METHYL ETHYL KETONE - Goop Troop

METHYL ETHYL KETONE (78-93-3)summary from the About the Chemicals section of Scorecard

Human Health Hazards Reference(s)Recognized: --Suspected: Cardiovascular or Blood Toxicant KLAA

Developmental Toxicant EPA-HEN EPA-SARA JANK

Gastrointestinal or Liver Toxicant OEHHA-99

Kidney Toxicant OEHHA-99

Neurotoxicant DAN EPA-HEN EPA-SARA

Reproductive Toxicant EPA-SARA

Respiratory Toxicant EPA-HEN OEHHA-AREL RTECS

Skin or Sense Organ Toxicant EPA-HEN OEHHA-AREL RTECS

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Hazard Rankings

More hazardous than most chemicals in 2 out of 10 ranking systems.

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Chemical Use Profile

This is a high volume chemical with production exceeding 1 million pounds annually in theU.S.Used in at least 13 industries.Used in consumer products, building materials or furnishings that contribute to indoor airpollution.

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Profile of Environmental Release and Waste Generation

For a list of the geographic areas, facilities, or industrial sectors which report the largestreleases or transfers of this chemical to the Toxics Release Inventory, select what you want:

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Regulatory Coverage

On at least 5 federal regulatory lists.

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Basic Testing to Identify Chemical Hazards

1 of 8 basic tests to identify chemical hazards has not been conducted on this chemical, or isnot publicly available.

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METHYL ETHYL KETONE

http://www.scorecard.org/chemical-profiles/summary.tcl?edf_substance_id=78%2d93%2d3 (1 of 2) [3/04/2001 7:56:07 PM]

Information Needed for Safety Assessment

Lacks at least some of the national data required for safety assessment.Scorecard has risk assessment data for this chemical.

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Links

Additional information about this chemical may be available elsewhere in Scorecard.

Other web sites specific to this chemical:

Agency for Toxic Substances and Disease Registry ToxFAQ■

CalEPA Air Resources Board Toxic Air Contaminant Summary■

EPA Health Effects Notebook for Hazardous Air Pollutants■

EPA Integrated Risk Information System Report■

EPA Office of Pollution Prevention and Toxics Chemical Fact Sheet■

EPA Office of Pollution Prevention and Toxics Chemical Fact Summary■

Environmental Writer Chemical Backgrounder■

IPCS International Chemical Safety Card■

International Toxicity Estimates for Risk (ITER) from the Toxicology Excellence forRisk Assessment

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National Toxicology Program Health and Safety Information Sheet■

New Jersey Fact Sheet■

If none of these sources meet your needs, you can try searching some other chemicaldatabase Web sites.

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METHYL ETHYL KETONE

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About the Chemicals: Data Descriptionsin the About the Chemicals section of Scorecard

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What types of industries are responsible for releasing a particular chemical to the environment or forgenerating the greatest amount of chemical waste? Based on company reports to the EPA Toxics ReleaseInventory, Scorecard shows you the manufacturing sectors that release the largest quantities of aparticular chemical or that generate the largest quantities as production-related waste.

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Is government doing anything to control a toxic chemical? Scorecard tells you if a chemical is coveredby federal environmental laws, or by California state laws (because California has unusually effectiveand innovative laws such as Proposition 65). It also tells you what chemicals are major environmentalhazards because they damage the ozone layer, contribute to global warming, or persist in theenvironment.

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Cardiovascular or Blood Toxicity Definitionfrom the Health Effects section of Scorecard

Cardiovascular and blood toxicity is defined as adverse effects on the cardiovascular or hematopoieticsystems that result from exposure to chemical substances. The cardiovascular system is composed of theheart and blood vessels; the hematopoietic system is composed of various blood cell types: erythrocytes(red blood cells), leukocytes (white blood cells), and platelets. Exposure to cardiovascular toxicants cancontribute to a variety of diseases, including elevated blood pressure (hypertension), hardening of thearteries (arteriosclerosis), abnormal heartbeat (cardiac arrhythmia),and decreased blood flow to the heart(coronary ischemia). Exposure to hematopoietic toxicants can reduce the oxygen carrying capacity of redblood cells, disrupt important immunological processes carried out by white blood cells, and inducecancer.

Because the cardiovascular system is complex, adverse effects resulting from exposure to chemicals canarise through a variety of mechanisms. Toxicants can contribute to cardiovascular disease by directlydamaging cardiac and blood vessel tissue, initiating arteriosclerotic plaque formation, stimulating theinflammatory response, or causing kidney-related hypertension. Lead, carbon disulfide, arsenic,cadmium, ozone, and vinyl chloride have been implicated in the etiology of cardiovascular disease.These chemicals may produce functional changes, such as cardiac arrhythmias, that can have serious andoften lethal consequences. They can also induce hypertension, a major cause of cardiac hypertrophy andheart failure. Several toxicants have been found to aggravate preexisting cardiovascular disease. Carbondisulfide and arsenic can irreversibly accelerate coronary heart disease.

The blood cells of the hematopoietic system can also be severely affected by chemical substances. Forexample, benzene, a component of motor fuel, is a hematopoietic toxin. Chronic exposure to benzenevapors leads to the decreased production of all types of blood cells (pancytopenia). The long-term effectof exposure to benzene is leukemia, a cancerous proliferation of white blood cells.

For further general information on chemicals and cardiovascular and blood toxicity, see the followingreferences:

Balazs, T., J. Hanig, and E. Herman. Toxic Responses of the Cardiovascular System. Chapter 14 inCasarett and Doull's Toxicology, edited by C. Klaassen, M. Amdur, and J. Doull. New York: PergamonPress, 1996.

Baskin, S. I. Principles of Cardiac Toxicology. Boca Raton, Fla.: CRC Press, 1991.

Smith, R. Toxic Responses of the Blood. Chapter 8 in Casarett and Doull's Toxicology, edited by C.Klaassen, M. Amdur, and J. Doull. New York: Pergamon Press, 1996.

Taylor, A. E. Cardiovascular Effects of Environmental Chemicals. Otolaryngology, Head and NeckSurgery. 114(2): 209-211. 1996.

Wilcosky, T. C. Solvent Exposure and Cardiovascular Disease. American Journal of Industrial Medicine.19:569-586 1991.

Cardiovascular or Blood Toxicity Definition

http://www.scorecard.org/health-effects/explanation.tcl?short_hazard_name=cardio (1 of 2) [3/04/2001 7:56:22 PM]

http://www.scorecard.org/health-effects

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references used to compile the list of cardiovascular or blood toxicants●

list of cardiovascular or blood toxicants●


Cardiovascular or Blood Toxicity Definition

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Cardiovascular or Blood Toxicity Referencesfrom the Health Effects section of Scorecard

There is no generally accepted source for an authoritative list of chemicals that are recognized to causecardiovascular or blood toxicity.

EDF's list of suspect cardiovascular and blood toxicants is compiled from the following sources:

AEGL: US EPA, National Advisory Committee for Acute Exposure Guideline Levels for HazardousSubstances. Notices. 62 Federal Register: 58839-58851 (October 30, 1997)

BENO: Benowitz, N.L. Cardiotoxicity in the Workplace. Occupational Medicine. 7(3): 465- 477. 1992.(Table 1: Chemical Toxins and Cardiovascular Disease).

CAA-AQC: US Environmental Protection Agency, Office of Research and Development. Air QualityCriteria for Ozone and Related Photochemical Oxidants, Volume III Washington, DC. July 1996.US Environmental Protection Agency, Office of Research and Development. Air Quality Criteria forOxides of Nitrogen, Volume III Washington, DC. August 1993.US Environmental Protection Agency, Office of Research and Development. Air Quality Criteria forParticulate Matter, Volume III Washington, DC. April 1996.US Environmental Protection Agency, Office of Research and Development. Air Quality Criteria forCarbon Monoxide. Washington, DC, December 1991.

CAPCOA: California Environmental Protection Agency and California Air Pollution Control OfficersAssociation. Air Toxics Hotspots Program Risk Assessment Guidance: Revised 1992 Risk AssessmentGuidance and Draft Evaluation of Acute Non-Cancer Health Effects. Office of Environmental HealthHazard Assessment, CalEPA, Berkeley, CA. December 1994 and January 1995.

CARB-TAC: California Air Resources Board. Toxic Air Contaminant Identification List Summaries andProposed Update to the Toxic Air Contaminant List. Air Resources Board, CalEPA, Sacramento, CA.January 1996 and December 1998. http://www.arb.ca.gov/toxics/tac/tac.htm.

EDF: See EDF's Custom Hazard Identification documentation.

EPA-HEN: US Environmental Protection Agency. Health Effects Notebook for Hazardous AirPollutants. Review Draft. December 1994. http://www. epa.gov/ttn/uatw/hapindex.html

EPA-TRI: US Environmental Protection Agency. Addition of Certain Chemicals; Toxic ChemicalRelease Reporting; Community Right to Know. Proposed and Final Rules. 59 Federal Register 1788 (Jan12, 1994); 59 Federal Register 61432 (November 30, 1994).

HEAST: EPA, Office of Research and Development. Health Effects Assessment Summary Tables.Electronic Handbook of Risk Assessment Values 9(6):6/30/00. Electronic Handbook Publishers,Redmond, WA. http://www.wolfenet.com/~sdwyer/ehrav.htm

KLAA: Klaassen, C., M. Amdur and J. Doull (eds.). Casarett and Doull's Toxicology. The Basic Scienceof Poisons, 5th Ed. Pergamon Press, NY. 1996. (Table 17-1: Cardiotoxicity of Key PharmaceuticalAgents, Table 17-2: Halogenated Hydrocarbons Reported to Have Arrhythmogenic Properties, Table

Cardiovascular or Blood Toxicity References

http://www.scorecard.org/health-effects/references.tcl?short_hazard_name=cardio (1 of 3) [3/04/2001 7:56:24 PM]


http://www.arb.ca.gov/toxics/tac/tac.htm

http://www.scorecard.org/health-effects/gen/cushazid.html

http://www.epa.gov/ttn/uatw/hapindex.html

http://www.wolfenet.com/~sdwyer/ehrav.htm

17-3: Cardiotoxicity of Selected Industrial Agents, Table 17-6: Vasculotoxic Agents: Heavy Metals,Table 17-7: Vasculotoxic Agents: Industrial and Environmental Agents, Table 17-8: VasculotoxicAgents: Gases).

KRIS: Kristensen, T. S. Cardiovascular Diseases and the Work Environment. Scandinavian Journal ofWork and Environmental Health. 15:245-264. 1989. (Table 5: Classification of possible risk factors forcardiovascular disease in the work environment).

LADO: LaDou, J. (ed.). Occupational Medicine. Appleton & Lange, Norwalk, CN. 1990. (Table 14-1:Chemicals associated with methemoglobinemia or oxidative hemolysis, Table 14-3: Toxic substancesassociated with acquired porphyria in humans, Table 14-4: Chemicals reported to cause aplastic anemiain an occupational setting, Table 14-5: Toxic agents associated with isolated thrombocytopenia, Table19-1: Classification of cardiovascular diseases and possible toxic causes).

MALA: Malachowsky, M.J. Health Effects of Toxic Substances. Government Institutes. Rockville, MD.1995. (Table 7-1: Chemicals affecting blood).

NJ-FS: New Jersey Department of Health Services. Right to Know Program, NJDOH, Trenton, NJ.http://www.state.nj.us/health/eoh/rtkweb/

OEHHA-2000: Office of Environmental Health Hazard Assessment, California EnvironmentalProtection Agency. Air Toxics Hot Spots Program Risk Assessment Guidelines, Part III. February, 2000(http://www.oehha.ca.gov/air/chronic_rels/22RELS2k.html) and May, 2000(http://www.oehha.ca.gov/air/chronic_rels/42kChREL.html)

OEHHA-99: Office of Environmental Health Hazard Assessment, California Environmental ProtectionAgency. Air Toxics Hot Spots Program Risk Assessment Guidelines, Part III, Draft Technical SupportDocument for the Determination of Noncancer Chronic Reference Exposure Levels. June 1999(http://www.oehha.ca.gov/air/chronic_rels/RAGSII.html) and October, 1999(http://www.oehha.ca.gov/air/chronic_rels/RAGSp3draft.html).

OEHHA-97: Office of Environmental Health Hazard Assessment, California Environmental ProtectionAgency. Draft Technical Support Document for the Determination of Noncancer Chronic ReferenceExposure Levels. October 1997. http://www.oehha.org/air/chronic_rels/GETRELS.html

OEHHA-AREL: Office of Environmental Health Hazard Assessment, California EnvironmentalProtection Agency. All acute reference exposure levels developed by OEHHA as of May 2000. May,2000. http://www.oehha.org/air/acute_rels/allAcRELs.html

RTECS: National Institute for Occupational Safety and Health's Registry of Toxic Effects of ChemicalSubstances. See EDF's Suspect Hazard Identification documentation.

STAC: Stacey, N.H. Occupational Toxicology. Taylor & Francis. 1995. (Table 3.16: Examples ofhaematopoietic injury from workplace exposure, Table 3.22: Workplace exposures implicated incardiovascular disease).



http://www.state.nj.us/health/eoh/rtkweb/

http://www.oehha.ca.gov/air/chronic_rels/22RELS2k.html

http://www.oehha.ca.gov/air/chronic_rels/42kChREL.html

http://www.oehha.ca.gov/air/chronic_rels/RAGSII.html

http://www.oehha.ca.gov/air/chronic_rels/RAGSp3draft.html

http://www.oehha.org/air/chronic_rels/GETRELS.html

http://www.oehha.org/air/acute_rels/allAcRELs.html

http://www.scorecard.org/health-effects/gen/sushazid.html

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definition of cardiovascular or blood toxicity●

list of cardiovascular or blood toxicants●




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Developmental Toxicity Definitionfrom the Health Effects section of Scorecard

Developmental toxicity is defined as adverse effects on the developing child that result from exposure tochemical substances. Sometimes called teratogens, developmental toxicants include agents that inducestructural malformations and other birth defects, low birth weight, metabolic or biological dysfunction,and psychological or behavioral deficits that become manifest as the child grows. Developmental toxicityis often considered to be a subcategory of reproductive toxicity, but is treated as a distinct healthendpoint in EDF's hazard identification system (see the separate definition of reproductive toxicity).

While developmental toxicity usually results from prenatal exposures to toxicants experienced by themother, it can also result from paternal exposures, or from postnatal exposures experienced by adeveloping child. Maternal exposure to toxic chemicals during pregnancy can disrupt the development ofor even cause the death of the fetus. Exposure of pregnant women to the developmental toxicantmercury, for example, has been shown to lower the birth weights of and cause severe brain damage intheir children. Among the adverse effects associated with maternal exposure to toluene are centralnervous system dysfunction, craniofacial and limb anomalies, and developmental delay. Dark brownpigmentation, shorter gestation time, and lower birth weight have been found in the children of womenexposed to polychlorinated biphenyls (PCBs) during their pregnancies.

Paternal exposure to toxicants can cause male reproductive toxicity, such as sterility, and may contributeto early fetal loss or birth defects. For example, the occupational exposure of men to vinyl chloride hasbeen associated with increased rates of spontaneous abortion in their wives. Early postnatal contact withtoxicants (through contaminated food or air) can affect normal development. Exposure to secondhandtobacco smoke, for example, increases an infant’s risk of contracting respiratory infections orsuccumbing to sudden infant death syndrome.

For further general information on chemicals and developmental toxicity, see the following references:

Manson, J. Teratogens. Chapter 7 in Casarett and Doull's Toxicology, edited by C. Klaassen, M. Amdur,and J. Doull. New York: Pergamon Press, 1996.

Schardein, J. Chemically Induced Birth Defects. New York; Dekker, 1985.

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references used to compile the list of developmental toxicants●

list of developmental toxicants●


Developmental Toxicity Definition

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Developmental Toxicity Referencesfrom the Health Effects section of Scorecard

P65: The most current and authoritative list of chemicals that are recognized to cause developmentaltoxicity is California's Proposition 65 . Substances are placed on the Proposition 65 list of chemicals"known to the state of California to cause reproductive toxicity" if an independent science advisory boardhas concluded they possess sufficient evidence of such toxicity in animals or humans, or if anauthoritative organization such as the National Toxicology Program have reached a similar conclusion,or if a federal regulatory agency requires a reproductive toxicity warning label. The Proposition 65 listidentifies whether a chemical is a developmental toxicant. The current Proposition 65 List ofReproductive Toxicants (February 2001) can be obtained fromhttp://www.oehha.ca.gov/prop65/prop65_list/Newlist.html.

A number of chemicals have toxicological evidence of developmental toxicity that currently does notsatisfy the sufficiency criteria used to list agents under Proposition 65, or that has not yet been finallyevaluated by hazard identification processes in the state of California or other authoritative agencies.EDF's list of suspect developmental toxicants is compiled from the following sources:

CAA-AQC: US Environmental Protection Agency, Office of Research and Development. Air QualityCriteria for Oxides of Nitrogen, Volume III Washington, DC. August 1993.US Environmental Protection Agency, Office of Research and Development. Air Quality Criteria forCarbon Monoxide. Washington, DC, December 1991.

EDF: See EDF's Custom Hazard Identification documentation.>


EPA-SARA: Roadmaps to Sources of Information on Chemicals Listed in the Emergency PlanningCommunity and Community Right-to-Know Act (Also Known as SARA Title 3), Section 313 ToxicRelease Inventory (for Microcomputers). (Report Number EPADFDK92040). 1991. Data file distributedin 2 diskettes by Office of Pollution, Prevention, and Toxics, Environmental Protection Agency,Washington, DC. NOTE: Datasource no longer being maintained by EPA; not currently available online.


JANK: Jankovic, J. A Screening Method for Occupational Reproductive Health Risk. AmericanIndustrial Hygiene Association Journal 57: 641-649. 1996.

NTP-R: Chapin, R.E. and R.A. Sloane. NIEHS/NTP Reproductive Assessment by Continuous Breeding:Evolving Study Design and Summaries of Ninety Studies. Environmental Health Perspectives 105,Supplement 1: 199-394. 1997.

OEHHA-2000: Office of Environmental Health Hazard Assessment, California EnvironmentalProtection Agency. Air Toxics Hot Spots Program Risk Assessment Guidelines, Part III. February, 2000

Developmental Toxicity References

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http://www.oehha.ca.gov/prop65/prop65_list/Newlist.html



(http://www.oehha.ca.gov/air/chronic_rels/22RELS2k.html) and May, 2000(http://www.oehha.ca.gov/air/chronic_rels/42kChREL.html)



P65-CAND: California EPA, Office of Environmental Health Hazard Assessment. Chemicals underconsideration for listing via the authoritative bodies mechanisms. September 29, 2000.http://www.oehha.ca.gov/prop65/CRNR_notices/admin_listing/requests_info/callin19b.htmlCalifornia EPA, Office of Environmental Health Hazard Assessment. Chemicals under consideration forlisting via the authoritative bodies mechanisms. June 2, 2000.http://www.oehha.ca.gov/prop65/crnr_notices/admin_listing/requests_info/callin19a.html

P65-MC: Hazard identification based on an extension of a Proposition 65 listing. Substance is either amember of a class that is a recognized Propositon 65 hazard, or is a class that contains a member that is arecognized Propositon 65 hazard. See EDF's Member Class Hazard Identification documentation.

P65-PEND: California EPA, Office of Environmental Health Hazard Assessment. Notice of Intent to ListChemicals. February 23, 2001.http://oehha.ca.gov/prop65/CRNR_notices/admin_listing/intent_to_list/noilnimodipine.htmlOffice of Environmental Health Hazard Assessment. Notice of Intent to List Chemicals. December29,2000. http://www.oehha.ca.gov/prop65/CRNR_notices/admin_listing/intent_to_list/noil19b1.htmlCalifornia EPA, Office of Environmental Health Hazard Assessment. Notice of Intent to List Chemicals.August 25, 2000.http://www.oehha.ca.gov/prop65/CRNR_notices/admin_listing/intent_to_list/noil19a1.htmlCalifornia EPA, Office of Environmental Health Hazard Assessment. Proposition 65 Notice of Intent toList Chemicals. October 29, 1999.http://www.oehha.org/prop65/CRNR_notices/admin_listing/intent_to_list/noilpk5B1.htmlCalifornia EPA, Office of Environmental Health Hazard Assessment. Proposition 65 Notice of Intent toList Chemicals. April 23, 1999.http://www.oehha.org/prop65/CRNR_notices/admin_listing/intent_to_list/noil14a.htmlCalifornia EPA, Office of Environmental Health Hazard Assessment. Proposition 65 Notice of Intent toList Chemicals. January 29,1999.http://www.oehha.org/prop65/CRNR_notices/admin_listing/intent_to_list/noil11a1.htmlCalifornia EPA, Office of Environmental Health Hazard Assessment. Proposition 65 Notice of Intent toList Chemicals. December 5, 1997.http://www.oehha.org/prop65/CRNR_notices/admin_listing/intent_to_list/noil1297.html








http://www.oehha.ca.gov/prop65/CRNR_notices/admin_listing/requests_info/callin19b.html

http://www.oehha.ca.gov/prop65/crnr_notices/admin_listing/requests_info/callin19a.html

http://www.scorecard.org/health-effects/gen/memclass.html

http://oehha.ca.gov/prop65/CRNR_notices/admin_listing/intent_to_list/noilnimodipine.html

http://www.oehha.ca.gov/prop65/CRNR_notices/admin_listing/intent_to_list/noil19b1.html

http://www.oehha.ca.gov/prop65/CRNR_notices/admin_listing/intent_to_list/noil19a1.html

http://www.oehha.org/prop65/CRNR_notices/admin_listing/intent_to_list/noilpk5B1.html

http://www.oehha.org/prop65/CRNR_notices/admin_listing/intent_to_list/noil14a.html

http://www.oehha.org/prop65/CRNR_notices/admin_listing/intent_to_list/noil11a1.html

http://www.oehha.org/prop65/CRNR_notices/admin_listing/intent_to_list/noil1297.html

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Gastrointestinal or Liver Toxicity Definitionsfrom the Health Effects section of Scorecard

Gastrointestinal and liver toxicity is defined as adverse effects on the structure and/or functioning of thegastrointestinal tract, liver, or gall bladder that result from exposure to chemical substances. The liverfunctions as a center for metabolism, processing chemicals we are exposed to so they can be utilized,detoxified, or excreted. While chemicals absorbed from the gastrointestinal tract are always processed bythe liver, toxicants that enter the body through other routes of exposure can also reach the liver via itsblood supply from the hepatic artery and the portal vein. The liver is frequently subject to injury inducedby chemicals, called hepatotoxins, because of its role as the body's principal site of metabolism.

Necrosis, or liver cell death, is a common effect of acute exposure to hepatotoxic chemicals likeberyllium, phosphorus, and urethane. The necrosis can be localized in specific areas of the liver or bemore widespread. The liver is usually able to recover from necrosis because of its remarkableregenerative capacity. Exposure to hepatotoxic substances can also cause fatty liver (steatosis), hepatitis,jaundice, cholestasis, chronic liver damage (cirrhosis), and cancer. Carbon tetrachloride and relatedchemicals, such as chloroform, are linked to steatosis, necrosis, and cirrhosis of the liver. The mostfrequent cause of cirrhosis, however, is the habitual consumption of large quantities of alcohol. Cancer ofthe liver has been associated with occupational exposures to arsenic, copper, and vinyl chloride.

The gastrointestinal, or digestive, tract is composed of the esophagus, stomach, pancreas, and small andlarge intestines. The gastrointestinal tract is the site of entry for chemicals that are ingested. Exposure tochemicals that are toxic to the digestive tract can cause anorexia, nausea, vomiting, abdominal cramps,and diarrhea. There are four major types of tissue response to gastrointestinal injury from toxic agents:ulceration, necrosis, inflammation, and proliferation, including cancer. Some chemicals that causegastrointestinal injury are halogenated aromatic hydrocarbons, including chlorobenzene andhexachlorobenzene, and such metals as lead, mercury, arsenic, and cadmium. Nitrosamines have beenshown to cause colon cancer in humans.

For further general information on chemicals and gastrointestinal and liver toxicity, see the followingreferences:

Britton, R. S. Metal-Induced Hepatotoxicity. Seminars in Liver Disease. 16(1): 3-12. 1996.

Plaa, G. Toxic Responses of the Liver. Chapter 10 in Casarett and Doull's Toxicology, edited by C.Klaassen, M. Amdur, and J. Doull. New York: Pergamon Press, 1996.

Rozman, K., ed. Gastrointestinal Toxicology. New York: Elsevier, 1986.

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Gastrointestinal or Liver Toxicity Definitions

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Gastrointestinal or Liver Toxicity Referencesfrom the Health Effects section of Scorecard

There is no generally accepted source for an authoritative list of chemicals that are recognized to causeliver or gastrointestinal toxicity.

EDF's list of suspect liver or gastrointestinal toxicants is compiled from the following sources:

CAA-AQC: US Environmental Protection Agency, Office of Research and Development. Air QualityCriteria for Ozone and Related Photochemical Oxidants, Volume III Washington, DC. July 1996.

CAPCOA: California Environmental Protection Agency and California Air Pollution Control OfficersAssociation. Air Toxics Hotspots Program Risk Assessment Guidance: Revised 1992 Risk AssessmentGuidance and Draft Evaluation of Acute Non-Cancer Health Effects. Office of Environmental HealthHazard Assessment, CalEPA, Berkeley, CA. December 1994 and January 1995.http://www.oehha.org/air/hot_spots/index.html


DIPA: DiPalma, J.A., J. Cunningham, J. Herrera, T. McCaffery, and D. Wolf. Occupational andIndustrial Toxin Exposures and the Gastrointestinal Tract. American Journal of Gastroenterology. 86(9):1107-1117. 1991. (Table 2: Selected Agents with Purported Digestive System Injury).

DOSS: Dossing, M. and P. Skinhoj. Occupational Liver Injury. Present State of Knowledge and FuturePerspectives. International Archives of Occupational and Environmental Health. 56:1-21. 1985. (Table 2:Chemically induced liver injury: morphologic features and examples of confirmed and suspectedcausative agents).





KLAA: Klaassen, C., M. Amdur and J. Doull (eds.). Casarett and Doull's Toxicology. The Basic Scienceof Poisons, 5th Ed. Pergamon Press, NY. 1996. (Table 13-2: Types of Hepatic Injury).

LADO: LaDou, J. (ed.). Occupational Medicine. Appleton & Lange, Norwalk, CT. 1990. (Table 20-1:Chemical Agents associated with occupational liver disease, Table 20-4: Agents causing acute hepatic

Gastrointestinal or Liver Toxicity References

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http://www.oehha.org/air/hot_spots/index.html





injury).

MALA: Malachowsky, M.J. Health Effects of Toxic Substances. Government Institutes. Rockville, MD1995. (Tables 7-2&3: Hepatotoxic Agents).







STAC: Stacey, N.H. Occupational Toxicology. Taylor & Francis. 1995. (Table 3.23: Clinicalmanifestations of chemical-induced gastrointestinal injury).

ZIMM: Zimmerman, H.J. and J.H. Lewis. Chemical- and Toxin- Induced Hepatotoxicity.Gastroenterology Clinics of North America. 24(4): 1027-1045. 1995. (Table 3: Forms of environmentalhepatic injury).

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Gastrointestinal or Liver Toxicity References

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Kidney Toxicity Definitionfrom the Health Effects section of Scorecard

Nephrotoxicity is defined as adverse effects on the kidney, ureter, or bladder that result from exposure tochemical substances. The kidney not only is the major excretory organ in the body, but also performsnonexcretory functions, such as regulating blood pressure and blood volume. Since the kidneys receiveapproximately 25 percent of cardiac output, any chemical in systemic circulation is delivered to them inrelatively high amounts. This makes the kidney unusually susceptible to the toxic effects of chemicals.Some nephrotoxic agents cause acute injury to the kidney, while others produce chronic changes that canlead to end-stage renal failure or cancer. The consequences of renal failure can be profound, sometimesresulting in permanent damage that requires dialysis or kidney transplantation.

Toxic injury to the kidney is known to occur as a result of occupational, accidental, or therapeuticexposure to certain chemicals. Renal toxicants include halogenated hydrocarbons, such as carbontetrachloride and trichloroethylene, and the heavy metals cadmium and lead.

For further general information on chemicals and kidney toxicity, see the following references:

Dixon, R. L., ed. Toxicology of the Kidney. Target Organ Toxicology Series. New York: Raven Press,1981.

Hook, J., and W. Hewitt. Toxic Responses of the Kidney. Chapter 11 in Casarett and Doull's Toxicology,edited by C. Klaassen, M. Amdur, and J. Doull. New York: Pergamon Press, 1996.

International Programme on Chemical Safety (IPCS). Principles and Methods for the Assessment ofNephrotoxicity Associated with Exposure to Chemicals. Environmental Health Criteria, no. 119. Geneva:World Health Organization, 199l.

Landrigan, P.J., R. A. Goyer, T. W. Clarkson, D. P. Sandler, J. H. Smith, M. J. Thun, and R. Wedeen.The Work-Relatedness of Renal Disease. Archives of Environmental Health. 39(3): 225-230. 1984.

Wedeen, R. P. Renal Disease of Occupational Origin. Occupational Medicine. 7(3):449-461. 1992.

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Kidney Toxicity Definition

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Kidney Toxicity Referencesfrom the Health Effects section of Scorecard

There is no generally accepted source for an authoritative list of chemicals that are recognized to causekidney toxicity.

EDF's list of suspect kidney toxicants is compiled from the following sources:

AEGL: US EPA, National Advisory Committee for Acute Exposure Guideline Levels for HazardousSubstances. Notices. 62 Federal Register: 58839-58851 (October 30, 1997).





KLAA: Klaassen, C., M. Amdur and J. Doull (eds.). Casarett and Doull's Toxicology. The Basic Scienceof Poisons, 5th Ed. Pergamon Press, NY. 1996. (Table 14-2: Examples of Nephrotoxic TherapeuticAgents, Table 14-3: Examples of Environmental Nephrotoxicants).

LAND: Landrigan, P.J., Goyer, R.A. Clarkson, T.W., Sandler, D.P., Smith, J.H., Thun, M.J., and R.Wedeen. The Work-Relatedness of Renal Disease. Archives of Environmental Health. 39(3): 225-230.1984. (Table 2: Estimated Numbers of Workers in the United States with Potential OccupationalExposures to Known or Suspect Nephrotoxins).



OEHHA-99: Office of Environmental Health Hazard Assessment, California Environmental ProtectionAgency. Air Toxics Hot Spots Program Risk Assessment Guidelines, Part III, Draft Technical SupportDocument for the Determination of Noncancer Chronic Reference Exposure Levels. June 1999(http://www.oehha.ca.gov/air/chronic_rels/RAGSII.html) and October, 1999

Kidney Toxicity References

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(http://www.oehha.ca.gov/air/chronic_rels/RAGSp3draft.html).



STAC: Stacey, N.H. Occupational Toxicology. Taylor & Francis. 1995. (Table 3.8: Examples ofworkplace exposures that have resulted in renal toxicity).

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Kidney Toxicity References

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http://www.scorecard.org/health-effects/chemicals.tcl?full_hazard_name=Kidney%20Toxicity&all_p=t



Neurotoxicity Definitionfrom the Health Effects section of Scorecard

Neurotoxicity is defined as adverse effects on the structure or functioning of the central and/or peripheralnervous system that result from exposure to chemical substances. Neurotoxicants can causemorphological changes that lead to generalized damage to nerve cells (neuronopathy), injury to axons(axonopathy), or destruction of the myelin sheath (myelinopathy). It is well established that exposure tocertain agricultural and industrial chemicals can damage the nervous system, resulting in neurologicaland behavioral dysfunction. Symptoms of neurotoxicity include muscle weakness, loss of sensation andmotor control, tremors, alterations in cognition, and impaired functioning of the autonomic nervoussystem

The central nervous system (CNS) is composed of the brain and spinal cord. It is responsible for thehigher functions of the nervous system (conditioned reflexes, learning, memory, judgment, and otherfunctions of the mind). Chemicals toxic to the CNS can induce confusion, fatigue, irritability, and otherbehavioral changes. Methyl mercury and lead are known CNS toxicants. Exposure to these metals canalso cause degenerative diseases of the brain (encephalopathy).

The peripheral nervous system (PNS) includes all the nerves not in the brain or spinal cord. These nervescarry sensory information and motor impulses. Damage to the nerve fibers of the PNS can disruptcommunication between the CNS and the rest of the body. The organic solvents carbon disulfide, n-hexane,and trichloroethylene can harm the PNS, resulting in weakness in the lower limbs, prickling ortingling in the limbs (paresthesia), and loss of coordination.

Exposure to chemical agents can trigger a wide range of adverse effects on the nervous system.Neurotoxic substances can alter the propagation of nerve impulses or the activity of neurotransmittersand can disrupt the maintenance of the myelin sheath or the synthesis of protein. As a result,neurotoxicological assessments require the administration of a battery of functional and observationaltests. Neurotoxicity in humans is most commonly measured by neurological tests that assess cognitive,sensory, and motor function.

For further general information on chemicals and neurotoxicity, see the following references:

International Programme on Chemical Safety (IPCS). Principles and Methods for the Assessment ofNeurotoxicity Associated with Exposure to Chemicals. Environmental Health Criteria, no. 60. Geneva:World Health Organization, 1986.

Needleman, H. L. Behavioral Toxicology. Environmental Health Perspectives. 103(Supplement 6):77-79. 1995.

Norton, S. Toxic Responses of the Central Nervous System. Chapter 13 in Casarett and Doull'sToxicology, edited by C. Klaassen, M. Amdur, and J. Doull. New York: Pergamon Press, 1996.

Office of Technology Assessment. Neurotoxicity: Identifying and Controlling Poisons of the NervousSystem. Washington, D.C.: Government Printing Office, 1990.

Neurotoxicity Definition

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Neurotoxicity Definition

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Neurotoxicity Referencesfrom the Health Effects section of Scorecard

There is no generally accepted source for an authoritative list of chemicals that are recognized to causeneurotoxicity.

EDF's list of suspect neurotoxicants is compiled from the following sources:


CAA-AQC: US Environmental Protection Agency, Office of Research and Development. Air QualityCriteria for Carbon Monoxide. Washington, DC, December 1991.



DAN: Nordic Council of Ministers and Danish National Institute of Occupational Health. NeurotoxicSubstances in the Working Environment (Danish ad hoc list). List originally published in NeurotoxicSubstances in the Work Environment, Danish Working Environment Service, At-report Nr. 13/1990.Suspect neurotoxicity identification now incorporated into 1998 Danish EPA All Chemicals List.http://www.mst.dk/udgiv/publications/2000/87-7909-501-1/pdf/87-7909-500-3.pdf.





EVAN: Evangelista, A.M. Behavioral Toxicology, Risk Assessment, and Chlorinated Hydrocarbons.Environmental. Health Perspectives. 104 (Supplement 2): 353-360. 1996. (Table 1: Comparison ofbehavioral toxicity of chlorinated hydrocarbons and related compounds).

Neurotoxicity References

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http://www.mst.dk/udgiv/publications/2000/87-7909-501-1/pdf/87-7909-500-3.pdf



FELD: Feldman, R.G. Role of the Neurologist in Hazard Identification and Risk Assessment.Environmental Health Perspectives. 104 (Supplement 2):227-237. 1996. (Table 1: Neurologic symptomsand associated exposures).


KLAA: Klaassen, C., M. Amdur and J. Doull (eds.). Casarett and Doull's Toxicology. The Basic Scienceof Poisons, 5th Ed. Pergamon Press, NY. 1996. (Tables 16-1: Compounds Associated with NeuronalInjury, Table 16-2: Compounds Associated with Axonal Injury, Table 16-3: Compounds Associated withInjury of Myelin).

LU: Lu, F.C. Basic Toxicology. 2nd Edition. 1991. (Appendix 16-1: Selected Neurotoxicants).

MASL: Massachusetts Department of Public Health. Commonwealth of Massachusetts. 105CMR670.000 Administrative Bulletin Concerning Massachusetts Substance List for "Right to Know" Law,M.G.L. 111F. 4/24/93. (Appendix A: Massachusetts Substance List)






STAC: Stacey, N.H. Occupational Toxicology. Taylor & Francis. 1995. (Table 3.9: Occupationaldiseases - brain and spinal cord, Table 3.10: Occupations associated with an excess of brain cancer,Table 3.11: Agents capable of producing brain cancer in experimental animals, Table 3.12: Occupationaldiseases - mental disorders, Table 3.14: Agents causing occupational neuropathy).

TANN: Tanner, C. Occupational and Environmental Causes of Parkinsonism. Occupational Medicine7(3): 5-3-513. (Table 2: Occupational and Environmental Causes of Parkinsonism).

ZAKR: Zakrzewski, S.F. Principles of Environmental Toxicology. American Chemical Society,











Washington, DC. 1997. (Table 7.4: TLV-TWA Values of Some Neurotoxins).

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Reproductive Toxicity Definitionfrom the Health Effects section of Scorecard

Reproductive toxicity is defined as adverse effects on the male and female reproductive systems thatresult from exposure to chemical substances. Reproductive toxicity may be expressed as alterations insexual behavior, decreases in fertility, or loss of the fetus during pregnancy. A reproductive toxicant mayinterfere with the sexual functioning or reproductive ability of exposed individuals from pubertythroughout adulthood. Developmental toxicity (adverse effects on the developing child, such as birthdefects) is often considered to be a subcategory of reproductive toxicity, but is treated as a distinct healthendpoint in EDF's hazard identification system (see the separate definition of developmental toxicity).

Toxicants that target the female reproductive system can cause a wide variety of adverse effects. Changesin sexual behavior, onset of puberty, cyclicity, fertility, gestation time, pregnancy outcome, and lactationas well as premature menopause are among the potential manifestations of female reproductive toxicity:all can disrupt a woman’s ability to successfully reproduce. Exposure to lead, for example, can result inmenstrual disorders and infertility. The toxicants carbon disulfide, mercury, and polychlorinatedbiphenyls (PBCs) have been shown to cause irregularities in the menstrual cycle. An increased rate ofspontaneous abortion has been found in hospital workers exposed to ethylene oxide.

Toxicants that target the male reproductive system can affect sperm count or shape, alter sexual behavior,and/or increase infertility. Carbon disulfide and the pesticides chlordecone (kepone), ethylene dibromide(EDB), and dibromochloropropane (DBCP) are examples of chemicals known to disrupt malereproductive health. These toxicants have lowered the sperm counts of exposed individuals. Occupationalexposure to DBCP has caused azoospermia (the total absence of sperm in the semen) and sterility.

For further general information on chemicals and reproductive toxicity, see the following references:

Dixon, R. Toxic Responses of the Reproductive System. Chapter 16 in Casarett and Doull's Toxicology,edited by C. Klaassen, M. Amdur, and J. Doull. New York: Pergamon Press, 1996.

US General Accounting Office. Reproductive and Developmental Toxicants, Regulatory Actions ProvideUncertain Protection (GAO/PEMD-92-3). Washington, D.C.: Government Printing Office, 1991.

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Reproductive Toxicity Definition

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http://www.scorecard.org/health-effects/chemicals.tcl?full_hazard_name=Reproductive%20Toxicity&all_p=t



Reproductive Toxicity Referencesfrom the Health Effects section of Scorecard

P65: The most current and authoritative list of chemicals that are recognized to cause reproductivetoxicity is California's Proposition 65 . Substances are placed on the Proposition 65 list of chemicals"known to the state of California to cause reproductive toxicity" if an independent science advisory boardhas concluded they possess sufficient evidence of such toxicity in animals or humans, or if anauthoritative organization such as the National Toxicology Program have reached a similar conclusion,or if a federal regulatory agency requires a reproductive toxicity warning label. The Proposition 65 listidentifies whether a chemical is a male or female reproductive toxicant. The current Proposition 65 Listof Reproductive Toxicants (February 2001) can be obtained fromhttp://www.oehha.ca.gov/prop65/prop65_list/Newlist.html.

A number of chemicals have toxicological evidence of reproductive toxicity that currently does notsatisfy the sufficiency criteria used to list agents under Proposition 65, or that has not yet been finallyevaluated by hazard identification processes in the state of California or other authoritative agencies.EDF's list of suspect reproductive toxicants is compiled from the following sources:

CAPCOA: California Environmental Protection Agency and California Air Pollution Control OfficersAssociation. Air Toxics Hotspots Program Risk Assessment Guidance: Revised 1992 Risk AssessmentGuidance and Draft Evaluation of Acute Non-Cancer Health Effects. Office of Environmental HealthHazard Assessment, CalEPA, Berkeley, CA. December 1994 and January 1995.http://www.oehha.org/air/acute_rels/acuterel.html





JANK: Jankovic, J. A Screening Method for Occupational Reproductive Health Risk. AmericanIndustrial Hygiene Association Journal. 57: 641-649. 1996.

KEMI-DAN: Hass U et al. Reproductive Toxicants in the Working Environment (In Danish.).Reproduktionsskadende kemiske stoffer i arbejdsmiljoet. AMI- rapport Nr. 35/1991. National Institute ofOccupational Health, Copenhagen, DK. 1991.

NTP-R: Chapin, R.E. and R.A. Sloane. NIEHS/NTP Reproductive Assessment by Continuous Breeding:

Reproductive Toxicity References

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http://www.oehha.ca.gov/prop65/prop65_list/Newlist.html

http://www.oehha.org/air/acute_rels/acuterel.html



Evolving Study Design and Summaries of Ninety Studies. Environmental Health Perspectives 105,Supplement 1: 199-394. 1997.




P65-CAND: California EPA, Office of Environmental Health Hazard Assessment. Chemicals underconsideration for listing via the authoritative bodies mechanisms. September 29, 2000.http://www.oehha.ca.gov/prop65/CRNR_notices/admin_listing/requests_info/callin19b.htmlCalifornia EPA, Office of Environmental Health Hazard Assessment. Chemicals under consideration forlisting via the authoritative bodies mechanisms. June 2, 2000.http://www.oehha.ca.gov/prop65/crnr_notices/admin_listing/requests_info/callin19a.html

P65-MC: Hazard identification based on an extension of a Proposition 65 listing. Substance is either amember of a class that is a recognized Propositon 65 hazard, or is a class that contains a member that is arecognized Propositon 65 hazard. See EDF's Member Class Hazard Identification documentation.

P65-PEND: California EPA, Office of Environmental Health Hazard Assessment. Notice of Intent to ListChemicals. Decmebr 29,2000.http://www.oehha.ca.gov/prop65/CRNR_notices/admin_listing/intent_to_list/noil19b1.htmlCalifornia EPA, Office of Environmental Health Hazard Assessment. Notice of Intent to List Chemicals.August 25, 2000.http://www.oehha.ca.gov/prop65/CRNR_notices/admin_listing/intent_to_list/noil19a1.htmlCalifornia EPA, Office of Environmental Health Hazard Assessment. Proposition 65 Notice of Intent toList Chemicals. April 23, 1999.http://www.oehha.org/prop65/CRNR_notices/admin_listing/intent_to_list/noil14a.htmlCalifornia EPA, Office of Environmental Health Hazard Assessment. Proposition 65 Notice of Intent toList Chemicals. March 19, 1999.http://www.oehha.org/prop65/CRNR_notices/admin_listing/intent_to_list/noilpkg1.htmlCalifornia EPA, Office of Environmental Health Hazard Assessment. Proposition 65 Notice of Intent toList Chemicals. December 5, 1997.http://www.oehha.org/prop65/CRNR_notices/admin_listing/intent_to_list/noil1297.html








http://www.oehha.ca.gov/prop65/CRNR_notices/admin_listing/requests_info/callin19b.html

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http://www.scorecard.org/health-effects/gen/memclass.html

http://www.oehha.ca.gov/prop65/CRNR_notices/admin_listing/intent_to_list/noil19b1.html

http://www.oehha.ca.gov/prop65/CRNR_notices/admin_listing/intent_to_list/noil19a1.html

http://www.oehha.org/prop65/CRNR_notices/admin_listing/intent_to_list/noil14a.html

http://www.oehha.org/prop65/CRNR_notices/admin_listing/intent_to_list/noilpkg1.html

http://www.oehha.org/prop65/CRNR_notices/admin_listing/intent_to_list/noil1297.html

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Respiratory Toxicity Definitionfrom the Health Effects section of Scorecard

Respiratory toxicity is defined as adverse effects on the structure or functioning of the respiratory systemthat result from exposure to chemical substances. The respiratory tract consists of the nasal passages,pharynx, trachea, bronchi, and lungs. The chief function of the respiratory system is to ensure theefficient and effective exchange of oxygen and carbon dioxide between the blood and the air. Respiratorytoxicants can produce a variety of acute and chronic pulmonary conditions, including local irritation,bronchitis, pulmonary edema, emphysema, and cancer.

It is well known that exposure to environmental and industrial chemicals can impair respiratory function.The air we breathe may contain toxic gases, vapors from solvents, aerosols, or particulate matter, all ofwhich can cause respiratory harm. For example, scientific evidence has shown that ozone and fineparticles pose a significant threat to respiratory health. Ground-level ozone, the main component insmog, causes breathing problems, aggravates asthma, and increases the severity and incidence ofrespiratory infections. More rarely, toxicants such as the herbicide paraquat may affect the respiratorytract after ingestion or dermal exposure.

Acute exposure to respiratory toxicants can trigger effects ranging from mild irritation to death byasphyxiation. Prolonged exposure to respiratory toxicants can cause structural damage to the lungs,resulting in chronic diseases such as pulmonary fibrosis, emphysema, and cancer. Pulmonary fibrosis is aserious lung disease in which airways become restricted or inflamed, leading to loss of elasticity anddifficulty in breathing. It can be caused by exposure to coal dust, aluminum, beryllium, and carbides oftungsten. Emphysema, a degenerative and potentially fatal disease, is characterized by the inability of thelungs to fully expand and contract. The most common cause of emphysema is heavy cigarette smoking,but the disease can also be induced by exposure to aluminum, cadmium oxide, ozone, and nitrogenoxides. In addition, several toxicants are known to cause respiratory cancer. Examples ofwell-established human lung carcinogens are cigarette smoke, asbestos, arsenic, and nickel.

For further general information on chemicals and respiratory toxicity, see the following references:

Menzel, D. B.,and M. Amdur. Toxic Responses of the Respiratory System. Chapter 15 in Casarett andDoull's Toxicology, edited by C. Klaassen, M. Amdur, and J. Doull. New York: Pergamon Press, 1996.

Schlesinger, R. B., and J. Graham. Health Effects of Atmospheric Acid Aerosols: A Model Problem inInhalation Toxicology and Air Pollution Risk Assessment (Symposium Overview). Fundamental andApplied Toxicology. 18: 17-24. 1992.

Vallyathan, V.,and X. Shi. The Role of Oxygen Free Radicals in Occupational and Environmental LungDisease. Environmental Health Perspectives. 105(Supplement 1): 165-177. 1997.

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Respiratory Toxicity Definition

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Respiratory Toxicity Referencesfrom the Health Effects section of Scorecard

There is no generally accepted source for an authoritative list of chemicals that are recognized to causerespiratory toxicity.

EDF's list of suspect respiratory toxicants is compiled from the following sources:


CAA-AQC: US Environmental Protection Agency, Office of Research and Development. Air QualityCriteria for Ozone and Related Photochemical Oxidants, Volume III Washington, DC. July 1996.US Environmental Protection Agency, Office of Research and Development. Air Quality Criteria forOxides of Nitrogen, Volume III Washington, DC. August 1993.US Environmental Protection Agency, Office of Research and Development. Air Quality Criteria forParticulate Matter and Sulfur Oxides, Volume III Washington, DC. December 1982.US Environmental Protection Agency, Office of Research and Development. Air Quality Criteria forParticulate Matter, Volume III Washington, DC. April 1996.


CARB-TAC: California Air Resources Board. Toxic Air Contaminant Identification List Summaries andProposed Update to the Toxic Air Contaminant List. Air Resources Board, CalEPA, Sacramento, CA.January 1996 and December 1998. http://www.arb.ca.gov/toxics/tac/tac.htm


EEC: European Economic Community. Sensitizing Substances in the EEC List of Dangerous Substances.Annex I to Council Directive 67/548/EEC.

EPA-HEN: US Environmental Protection Agency. Health Effects Notebook for Hazardous AirPollutants. Review Draft. December 1994. http://www.epa.gov/ttn/uatw/hapindex.html


FOTH: Foth, H. Role of the Lung in Accumulation and Metabolism of Xenobiotic compounds-Implications for Chemically Induced Toxicity. Critical Reviews in Toxicology. 25(2): 165- 205. 1995.(Table 1:Toxic Damage of Lung by Foreign Compounds).

KLAA: Klaassen, C., M. Amdur and J. Doull (eds.). Casarett and Doull's Toxicology. The Basic Scienceof Poisons, 5th Ed. Pergamon Press, NY. 1996. (Table 15-1: Industrial Toxicants that Produce Lung

Respiratory Toxicity References

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Disease).

LADO: LaDou, J. (ed.). Occupational Medicine. Appleton & Lange, Norwalk, CT. 1990. (Table 39-1:Major pollutants associated with adverse pulmonary effects).

LU: Lu, F.C. Basic Toxicology. 2nd Edition. 1991. (Appendix 11-1: Site of Action and PulmonaryDisease Produced by Selected Occupationally Inhaled Toxicants).

NEME: Nemery, B. Metal Toxicity and the Respiratory Tract. European Respiratory Journal. 3(2):202-219. 1990.(Table 1: Summary of pulmonary toxicity of metals).


NTP-HS: National Toxicology Program. Chemical Repository of Health and Safety Data.http://ntp-db.niehs.nih.gov/NTP_Reports/NTP_Chem_H&S/NTP_Chem8/Radian85-01- 8.txt






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Skin or Sense Organ Toxicity Definitionfrom the Health Effects section of Scorecard

Skin and sense organ toxicity is defined as adverse effects on the skin or sense organs that result fromexposure to chemical substances. The senses of smell, vision, hearing, and taste are referred to as thespecial senses. Sense organs may be injured by a variety of physical, chemical, and biological agents.The sense of smell can become impaired, for example, as a result of occupational exposure to the metalscadmium and nickel. A variety of chemicals that act both locally and systemically in the body can affectvision. Airborne chemicals such as inorganic irritant gases and vapors (ammonia, chlorine, hydrogensulfide, and sulfur dioxide) formaldehyde, and many organic solvents can cause external eye irritation,including conjunctivitis and keratitis, in some cases reducing visual acuity. Chemical substances caninduce auditory dysfunction as well. Occupational exposure to lead, for example, is associated withhearing loss.

The skin provides the body with a protective barrier, contains the nerves that support the sense of touch,and participates in the exchange of gases and liquids. When the skin is exposed to irritant compounds,symptoms of skin injury may occur: redness, inflammation, burning, and itching. Acute and chronic skindiseases that may result from contact with toxic agents include dermatitis, photosensitization, chloracne,urticaria, and cancer.

One of the most common chemically induced skin disorders is contact dermatitis, an inflammatoryreaction of the skin that is usually restricted to the exposed areas. Clinical signs may include reddening,edema, itching, or a burning sensation. Strongly alkaline and acidic substances such as sodiumhydroxide, sulfuric acid, and hydrofluoric acid are some of the irritants that can cause contact dermatitisand related disorders. A number of skin toxicants produce photosensitization, an abnormal reaction toultraviolet and/or visible radiation. Known photosensitizers include anthraquinone dyes, sulfanilamide,and coal tar derivatives (anthracene, pyridine, acridine, and phenanthrene). Chloracne is a severe andunusual form of acne that can be triggered by exposure to certain halogenated aromatic compounds, suchas polychlorinated dibenzo furans and dioxins. Finally, arsenic, coal tars, creosote oils, and ultravioletlight have been shown to induce skin cancer in humans.

For further general information on chemicals and skin and sense organ toxicity, see the followingreferences:

Adams, R. M. Occupational Skin Disease. 2 nd ed. Philadelphia: Saunders, 1990.

Emmett, E. A. Toxic Responses of the Skin. Chapter 15 in Casarett and Doull's Toxicology, edited by C.Klaassen, M. Amdur, and J. Doull. New York: Pergamon Press, 1996.

Kimmel, C. A. Dermal Toxicology. Archives of Toxicology. Supplement 15: 123-129. 1992.

Potts, A. Toxic Responses of the Eye. Chapter 17 in Casarett and Doull's Toxicology, edited by C.Klaassen, M. Amdur, and J. Doull. New York: Pergamon Press, 1996.

Shusterman, D. J., and J. Sheedy. Occupational and Environmental Disorders of the Special Senses.Occupational Medicine. 7(3): 515-542. 1992.

Skin or Sense Organ Toxicity Definition

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Skin or Sense Organ Toxicity Definition

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Skin or Sense Organ Toxicity Referencesfrom the Health Effects section of Scorecard

There is no generally accepted source for an authoritative list of chemicals that are recognized to causeskin or sensory organ toxicity.

EDF's list of suspect skin or sensory organ toxicants is compiled from the following sources:




EEC: European Economic Community. Sensitizing Substances in the EEC List of Dangerous Substances.Annex I to Council Directive 67/548/EEC.



HARV: Harvell, J., M. Bason and H. Maibach. Contact Urticaria and its Mechanisms. Food Chemistryand Toxicology 32(2): 103-112. 1994. (Table 2: Substances identified as capable of causing contacturticaria).

KLAA: Klaassen, C., M. Amdur and J. Doull (eds.). Casarett and Doull's Toxicology. The Basic Scienceof Poisons, 5th Ed. Pergamon Press, NY. 1996. (Tables 18-2: Selected Chemicals Causing Skin Burns,Table 18-3: Common Contact Allergens, Table 18- 6: Selected Phototoxic Agents, Table 18-8: Causes ofChloracne).

LADO: LaDou, J. (ed.). Occupational Medicine. Appleton & Lange, Norwalk, CN. 1990. (Table 17-1:Occupational phototoxic dermatitis: Causes and workers affected, Table 17-4: Common causes ofoccupational allergic contact dermatitis and typical occupational groups affected, Table 17-5: Establishedcauses of occupational vitiligo, Table 17-8: Occupational cutaneous carcinogens and occupations withsignificant exposure).

LOCK: Lock, E.A., and E. Harpur. Toxicology of Sensory System: A Perspective. Human andExperimental Toxicology. 11(6): 442-448. 1992. (Table 1: Chemicals that induce olfactory lesions inexperimental animals by either inhalation and/or non- inhalation routes).

LU: Lu, F.C. Basic Toxicology. Fundamentals, Target Organs, and Risk Assessment. 2nd Ed. 1991.(Appendix 15-1: Cataractogenic Chemicals).

Skin or Sense Organ Toxicity References

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NTP-HS: National Toxicology Program. Chemical Repository of Health and Safety Data. http://ntp-db.niehs.nih.gov/NTP_Reports/NTP_Chem_H&S/NTP_Chem8/Radian85 -01-8.txt

OOEHHA-2000: Office of Environmental Health Hazard Assessment, California EnvironmentalProtection Agency. Air Toxics Hot Spots Program Risk Assessment Guidelines, Part III. February, 2000(http://www.oehha.ca.gov/air/chronic_rels/22RELS2k.html) and May, 2000(http://www.oehha.ca.gov/air/chronic_rels/42kChREL.html)





TIMB: Timbrell, J.A. Introduction to Toxicology. Taylor and Francis, New York. 1995. (Table 5.1:Types of skin sensitizers).

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Hazard Rankingsfor METHYL ETHYL KETONE (78-93-3) from Scorecard

LeastHazardous Most

Hazardous Percentile 25% 50% 75% 100%

Human Health Rankings

Toxicity only

Ingestion Toxicity Weight (RSEI)

Inhalation Toxicity Weight (RSEI)

Human Health Effects Score (UTN)

Toxicity and exposure potential

Noncancer Risk Score - Air Releases (EDF)

Noncancer Risk Score - Water Releases (EDF)

Worker Exposure Hazard Score (IRCH)

Ecological Health Rankings

Toxicity only

Ecological Effects Score (UTN)

Toxicity and persistence

Environmental Hazard Value Score (IRCH)

Integrated Environmental Rankings

Combined human and ecological scores

Total Hazard Value Score (IRCH)

Total Hazard Value Score (UTN)


METHYL ETHYL KETONE -- Hazard Rankings

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http://www.scorecard.org/chemical-profiles/def/tox_only.html

http://www.scorecard.org/chemical-profiles/hazard-detail.tcl?edf_substance_id=78%2d93%2d3&short_list_name=tri%5fing

http://www.scorecard.org/chemical-profiles/hazard-detail.tcl?edf_substance_id=78%2d93%2d3&short_list_name=tri%5finh

http://www.scorecard.org/chemical-profiles/hazard-detail.tcl?edf_substance_id=78%2d93%2d3&short_list_name=utn%5fhuman

http://www.scorecard.org/chemical-profiles/def/tox_exp.html

http://www.scorecard.org/chemical-profiles/hazard-detail.tcl?edf_substance_id=78%2d93%2d3&short_list_name=tep%5fnonair

http://www.scorecard.org/chemical-profiles/hazard-detail.tcl?edf_substance_id=78%2d93%2d3&short_list_name=tep%5fnonwat

http://www.scorecard.org/chemical-profiles/hazard-detail.tcl?edf_substance_id=78%2d93%2d3&short_list_name=irch%5fhuman

http://www.scorecard.org/chemical-profiles/def/tox_only.html

http://www.scorecard.org/chemical-profiles/hazard-detail.tcl?edf_substance_id=78%2d93%2d3&short_list_name=utn%5feco

http://www.scorecard.org/chemical-profiles/def/tox_per.html

http://www.scorecard.org/chemical-profiles/hazard-detail.tcl?edf_substance_id=78%2d93%2d3&short_list_name=irch%5feco

http://www.scorecard.org/chemical-profiles/def/combined.html

http://www.scorecard.org/chemical-profiles/hazard-detail.tcl?edf_substance_id=78%2d93%2d3&short_list_name=irch%5finteg

http://www.scorecard.org/chemical-profiles/hazard-detail.tcl?edf_substance_id=78%2d93%2d3&short_list_name=utn%5finteg



High Production Volume (HPV) Chemicalsfrom Scorecard

DESCRIPTION

High production volume chemicals have annual production and/or importation volumes above 1 millionpounds. In the U.S., 2,979 chemicals (excluding polymers) out of approximately 70,000 chemicals incommerce are used in such substantial quantities. While there are no authoritative estimates of theamount of total chemical use in the U.S., 4.4 to 7.1 trillion pounds of HPV chemicals areproduced/imported annually.

The Organization for Economic Co-operation and Development (OECD) also maintains a list of 4,102HPV chemicals. The OECD list includes chemicals which have annual production volumes greater than1 thousand metric tonnes (2.2 million pounds) in more than one economically developed country.

REFERENCES

The U.S. list of HPV chemicals was generated from company reports of chemical use in 1990, submittedin response to the Toxic Substances Control Act Inventory Update Rule. Companies are only required toreport their chemical production/imports as a range. The EPA is currently working on updating theirHPV list using 1994 inventory reports.

Note that chemicals used as pesticides, food additive, drugs and cosmetics are not included in EPA'sHPV list.

EPA's High Production Volume Chemical Listhttp://www.epa.gov/opptintr/chemrtk/hpvchmlt.htm

OECD's High Production Volume Chemical Listhttp://www.oecd.org/ehs/hpv.htm


High Production Volume (HPV) Chemicals

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http://www.epa.gov/opptintr/chemrtk/hpvchmlt.htm

http://www.oecd.org/ehs/hpv.htm



Industrial Usesfor METHYL ETHYL KETONE (78-93-3) from Scorecard

This is a high volume chemical with production exceeding 1 million pounds annually in the U.S.

Which Industries Use This Chemical? How is the Chemical Used in This Industry?

Adhesives Manufacture Carpet adhesive solventsElectroplating Electroplating - Cold-cleaning SolventsElectroplating Electroplating - Vapor Degreasing SolventsLaboratory Chemicals Solvents - ExtractionMachinery Mfg and Repair Solvents - Machinery Manufacture and RepairMetal Degreasing Solvents - Metal DegreasingPaint Manufacture Solvents, Not Elsewhere ClassifiedPaint Stripping Solvents - Paint StrippingPaper Coating SolventsPesticide Mfg (Insecticides) Solvents - Insecticide ManufacturePrinting Solvents for FlexographyPrinting Solvents for Gravure PrintingReprographic Agents Diazotype Materials - Misc. ChemicalsRubber Manufacture Solvents - Rubber ManufactureWood Stains and Varnishes Varnish Solvents


METHYL ETHYL KETONE -- Industrial Uses

http://www.scorecard.org/chemical-profiles/uses.tcl?edf_substance_id=78%2d93%2d3 [3/04/2001 7:56:55 PM]

http://www.scorecard.org/chemical-profiles/def/chem_use.html



Consumer Productsthat contain METHYL ETHYL KETONE (78-93-3) from Scorecard

What kinds of consumer products may contain this chemical?

Acid nonhousehold metal cleaners (liquid)●

Aerosol paint concentrates●

Architectural coatings●

Auto, other transportation, and machinery refinish paints incl primers●

Automobile body polish and cleaners●

General performance sealants (PVAC, butyl, vinyl, etc.)●

Gravure inks●

Ground/traffic marking coatings●

Household hard surface cleaners (aerosol)●

Household hard surface cleaners (liquid)●

Household tints and dyes●

Industrial particleboard (furniture, fixtures, cabinets, etc.)●

Inks, writing and stamp pad inks (excl drawing and printing inks)●

Laundry starch preparations●

Lubricating oils●

Markers, fine point and broad tipped●

Misc. use aromatics●

Miscellaneous agricultural/pesticidal products●

Miscellaneous paint-related products●

Nail enamel and polish removers●

Nonstructural caulking compounds and sealants●

Other art materials incl clay, water & tempera colors, finger paint, etc.●

Other automotive chemicals●

Other industrial chemical specialty products●

Other manicuring preparations●

Other miscellaneous allied paint products, including brush cleaners●

Other specialty cleaning and sanitation products●

Paint and varnish removers●

Paint thinners●

Shoe polishes and cleaners●

Solvent thinned interior clear finishes●

Solvent thinned interior stains●

METHYL ETHYL KETONE -- Consumer Products

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Solvent thinned interior undercoaters and primers●

Specialty performance sealants●

Surfactants, finishing agents, and assistants●

Synthetic resin and rubber adhesives●

Waterproofing compounds●


METHYL ETHYL KETONE -- Consumer Products

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Scorecard's Source for Environmental Release andWaste Management Datafrom Scorecard

Scorecard's source for information about chemical releases and waste management from manufacturingfacilities is the U.S. Environmental Protection Agency's Toxics Release Inventory. The TRI database wasestablished by Section 313 of the Emergency Planning and Community Right-To-Know Act of 1986(EPCRA).

Under EPCRA, manufacturing facilities in specific industries are required to report their environmentalreleases and chemical waste management annually to EPA. Covered facilities must disclose their releasesof approximately 650 toxic chemicals and chemical categories to air, water, and land, as well as thequantities of chemicals they recycle, treat, burn, or otherwise dispose of on-site and off-site. The specificcategories of releases, transfers and overall waste generation reported to TRI are explained byScorecard's Definitions of Toxics Release Inventory Reporting Categories.

Scorecard's 1998 TRI data is derived from the reports of 23,500 manufacturing and federal facilities.Seven "new" industries (e.g., mining and electric power generation) were required to report their releaseand waste management data for the first time in 1998, substantially increasing the total amount ofchemicals tracked by TRI.

In 1998, facilities reported a total of 7.3 billion pounds of releases to air, land, water and undergroundinjection. "Original" industries (required to report to TRI prior to 1997) reported approximately 2.4billion pounds, or 32.6%, of the 7.3 billion pounds. Facilities in the new sectors reported almost 4.9billion pounds, or 67.4%, of the 7.3 billion pounds. Reporting from the new industries accounted for 91.7% of the land releases on-site, 38.8% of the air releases, 21.2 % of the releases to underground injectionwells, and 3.5% of the discharges to surface water.

THE LIMITS OF TRI DATA

While TRI is the most comprehensive national source of information about toxic chemical releases, it hascritical limitations:

1) TRI does not cover all toxic chemicals that have the potential to adversely affect human health or theenvironment.

2) TRI does not require reporting from many major sources of pollution releases.

3) TRI does not require companies to report the quantities of toxic chemicals used or the amounts thatremain in products.

4) TRI does not provide information about the exposures people may experience as a consequence ofchemical use.

WHAT NEW POLLUTION SOURCES ARE COVERED FOR THE FIRST TIME BY 1998 TRIDATA

Scorecard's Source for Environmental Release and Waste Management Data

http://www.scorecard.org/general/tri/tri_gen.html (1 of 2) [3/04/2001 7:56:58 PM]

http://www.scorecard.org/general/tri/tri_desc.html

http://www.scorecard.org/general/tri/tri_chem.html

http://www.scorecard.org/general/tri/tri_chem.html

http://www.scorecard.org/general/tri/tri_source.html

http://www.scorecard.org/general/tri/tri_use.html

http://www.scorecard.org/general/tri/tri_use.html

http://www.scorecard.org/general/tri/tri_exp.html

http://www.scorecard.org/general/tri/tri_exp.html

Seven "new" industries only began reporting to TRI in 1998, and now dominate most rankings based onenvironmental releases:

Metal miningCoal miningElectric utilitiesCommercial hazardous-waste treatmentPetroleum bulk terminalsChemical wholesalersSolvent recovery services

SCORECARD'S SOURCE FOR TRI DATA

All environmental release data in Scorecard are derived from the U.S. Environmental ProtectionAgency's public release of the 1998 TRI database. Issues related to the quality of 1998 TRI data used inScorecard are explained in How Reliable Are TRI Data?

MORE ON TRI

Other websites related to TRI:

U.S. EPA Toxics Release Inventory: Community Right-to-Know Homepage http://www.epa.gov/tri/

U.S. EPA Envirofacts Warehouse Toxics Release Inventory: TRI Overviewhttp://www.epa.gov/enviro/html/tris/tris_overview.html

RTK Net: The Right-to-Know Network http://www.rtk.net/trisearch.html


Scorecard's Source for Environmental Release and Waste Management Data

http://www.scorecard.org/general/tri/tri_gen.html (2 of 2) [3/04/2001 7:56:58 PM]

http://www.epa.gov/tri/tri98/index.htm

http://www.scorecard.org/general/tri/tri_data.html

http://www.epa.gov/tri/

http://www.epa.gov/enviro/html/tris/tris_overview.html

http://www.rtk.net/trisearch.html



States with Reported Total Environmental Releasesof METHYL ETHYL KETONE (78-93-3) from the About The Chemicals section of Scorecard

Ranked by (select your ranking criteria)

(explain)

TEXAS: 5,236,767 Pounds1.

OHIO: 3,282,734 Pounds2.

INDIANA: 3,077,335 Pounds3.

MISSISSIPPI: 2,684,597 Pounds4.

PENNSYLVANIA: 2,462,291 Pounds5.

NORTH CAROLINA: 2,447,000 Pounds6.

ALABAMA: 2,350,138 Pounds7.

VIRGINIA: 2,083,585 Pounds8.

ILLINOIS: 1,713,396 Pounds9.

MICHIGAN: 1,457,248 Pounds10.

WISCONSIN: 1,441,837 Pounds11.

LOUISIANA: 1,440,410 Pounds12.

GEORGIA: 1,437,893 Pounds13.

SOUTH CAROLINA: 1,319,978 Pounds14.

TENNESSEE: 1,287,971 Pounds15.

MISSOURI: 1,186,766 Pounds16.

OREGON: 1,062,273 Pounds17.

WASHINGTON: 1,043,965 Pounds18.

MINNESOTA: 875,818 Pounds19.

WEST VIRGINIA: 856,675 Pounds20.

ARKANSAS: 759,052 Pounds21.

KANSAS: 746,333 Pounds22.

CALIFORNIA: 743,640 Pounds23.

KENTUCKY: 649,014 Pounds24.

NEW YORK: 639,203 Pounds25.

OKLAHOMA: 638,767 Pounds26.

FLORIDA: 507,772 Pounds27.

NEW JERSEY: 483,762 Pounds28.

About The Chemicals: By State

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http://www.scorecard.org/chemical-profiles/rankings-explanations.tcl

http://www.scorecard.org/env-releases/state.tcl?state_name=TEXAS

http://www.scorecard.org/env-releases/state.tcl?state_name=OHIO

http://www.scorecard.org/env-releases/state.tcl?state_name=INDIANA

http://www.scorecard.org/env-releases/state.tcl?state_name=MISSISSIPPI

http://www.scorecard.org/env-releases/state.tcl?state_name=PENNSYLVANIA

http://www.scorecard.org/env-releases/state.tcl?state_name=NORTH%20CAROLINA

http://www.scorecard.org/env-releases/state.tcl?state_name=ALABAMA

http://www.scorecard.org/env-releases/state.tcl?state_name=VIRGINIA

http://www.scorecard.org/env-releases/state.tcl?state_name=ILLINOIS

http://www.scorecard.org/env-releases/state.tcl?state_name=MICHIGAN

http://www.scorecard.org/env-releases/state.tcl?state_name=WISCONSIN

http://www.scorecard.org/env-releases/state.tcl?state_name=LOUISIANA

http://www.scorecard.org/env-releases/state.tcl?state_name=GEORGIA

http://www.scorecard.org/env-releases/state.tcl?state_name=SOUTH%20CAROLINA

http://www.scorecard.org/env-releases/state.tcl?state_name=TENNESSEE

http://www.scorecard.org/env-releases/state.tcl?state_name=MISSOURI

http://www.scorecard.org/env-releases/state.tcl?state_name=OREGON

http://www.scorecard.org/env-releases/state.tcl?state_name=WASHINGTON

http://www.scorecard.org/env-releases/state.tcl?state_name=MINNESOTA

http://www.scorecard.org/env-releases/state.tcl?state_name=WEST%20VIRGINIA

http://www.scorecard.org/env-releases/state.tcl?state_name=ARKANSAS

http://www.scorecard.org/env-releases/state.tcl?state_name=KANSAS

http://www.scorecard.org/env-releases/state.tcl?state_name=CALIFORNIA

http://www.scorecard.org/env-releases/state.tcl?state_name=KENTUCKY

http://www.scorecard.org/env-releases/state.tcl?state_name=NEW%20YORK

http://www.scorecard.org/env-releases/state.tcl?state_name=OKLAHOMA

http://www.scorecard.org/env-releases/state.tcl?state_name=FLORIDA

http://www.scorecard.org/env-releases/state.tcl?state_name=NEW%20JERSEY

MASSACHUSETTS: 473,695 Pounds29.

IOWA: 361,406 Pounds30.

RHODE ISLAND: 311,987 Pounds31.

CONNECTICUT: 267,972 Pounds32.

PUERTO RICO: 251,541 Pounds33.

IDAHO: 241,395 Pounds34.

MARYLAND: 224,678 Pounds35.

NEBRASKA: 220,653 Pounds36.

NEW HAMPSHIRE: 194,686 Pounds37.

ARIZONA: 191,467 Pounds38.

COLORADO: 146,255 Pounds39.

UTAH: 92,705 Pounds40.

DELAWARE: 51,303 Pounds41.

SOUTH DAKOTA: 43,069 Pounds42.

NORTH DAKOTA: 39,172 Pounds43.

VERMONT: 26,747 Pounds44.

MAINE: 17,852 Pounds45.

MONTANA: 15,477 Pounds46.

NEVADA: 14,704 Pounds47.

NEW MEXICO: 4,250 Pounds48.

Note: if you don't like the way this page works or looks, you can click here to personalize the site.


About The Chemicals: By State

http://www.scorecard.org/chemical-profiles/rank-...mass&category=total_env&modifier=na&how_many=100 (2 of 2) [3/04/2001 7:57:00 PM]

http://www.scorecard.org/env-releases/state.tcl?state_name=MASSACHUSETTS

http://www.scorecard.org/env-releases/state.tcl?state_name=IOWA

http://www.scorecard.org/env-releases/state.tcl?state_name=RHODE%20ISLAND

http://www.scorecard.org/env-releases/state.tcl?state_name=CONNECTICUT

http://www.scorecard.org/env-releases/state.tcl?state_name=PUERTO%20RICO

http://www.scorecard.org/env-releases/state.tcl?state_name=IDAHO

http://www.scorecard.org/env-releases/state.tcl?state_name=MARYLAND

http://www.scorecard.org/env-releases/state.tcl?state_name=NEBRASKA

http://www.scorecard.org/env-releases/state.tcl?state_name=NEW%20HAMPSHIRE

http://www.scorecard.org/env-releases/state.tcl?state_name=ARIZONA

http://www.scorecard.org/env-releases/state.tcl?state_name=COLORADO

http://www.scorecard.org/env-releases/state.tcl?state_name=UTAH

http://www.scorecard.org/env-releases/state.tcl?state_name=DELAWARE

http://www.scorecard.org/env-releases/state.tcl?state_name=SOUTH%20DAKOTA

http://www.scorecard.org/env-releases/state.tcl?state_name=NORTH%20DAKOTA

http://www.scorecard.org/env-releases/state.tcl?state_name=VERMONT

http://www.scorecard.org/env-releases/state.tcl?state_name=MAINE

http://www.scorecard.org/env-releases/state.tcl?state_name=MONTANA

http://www.scorecard.org/env-releases/state.tcl?state_name=NEVADA

http://www.scorecard.org/env-releases/state.tcl?state_name=NEW%20MEXICO




Counties with Reported Total EnvironmentalReleasesof METHYL ETHYL KETONE (78-93-3) from the About The Chemicals section of Scorecard


in

(explain)

JEFFERSON, TX: 1,782,555 pounds1.

LOWNDES, MS: 1,557,600 pounds2.

WICHITA, TX: 917,582 pounds3.

JACKSON, OR: 897,100 pounds4.

COOK, IL: 875,475 pounds5.

LUCAS, OH: 791,337 pounds6.

HARRIS, TX: 784,325 pounds7.

VENANGO, PA: 693,020 pounds8.

LAKE, IN: 667,643 pounds9.

SUMTER, GA: 608,225 pounds10.

HOUSTON, AL: 591,198 pounds11.

ALCORN, MS: 582,320 pounds12.

DANE, WI: 556,619 pounds13.

BEDFORD (CITY), VA: 500,000 pounds14.

GRANVILLE, NC: 473,200 pounds15.

CALCASIEU, LA: 424,339 pounds16.

CADDO, LA: 419,351 pounds17.

KING, WA: 393,938 pounds18.

SNOHOMISH, WA: 381,982 pounds19.

LAUDERDALE, TN: 380,000 pounds20.

MCKEAN, PA: 362,355 pounds21.

SEDGWICK, KS: 359,521 pounds22.

TRUMBULL, OH: 352,648 pounds23.

BRUNSWICK, NC: 351,000 pounds24.

COLBERT, AL: 350,251 pounds25.

About The Chemicals: By County

http://www.scorecard.org/chemical-profiles/rank-...state_code=Entire%20United%20States&how_many=100 (1 of 4) [3/04/2001 7:57:02 PM]



http://www.scorecard.org/env-releases/county.tcl?fips_county_code=48245

























PORTER, IN: 297,763 pounds26.

KENT, MI: 289,514 pounds27.

WINCHESTER (CITY), VA: 287,874 pounds28.

JEFFERSON, WV: 280,000 pounds29.

SPARTANBURG, SC: 267,918 pounds30.

TULSA, OK: 267,705 pounds31.

HENNEPIN, MN: 259,366 pounds32.

TUSCALOOSA, AL: 256,227 pounds33.

MARSHALL, IN: 254,907 pounds34.

CUYAHOGA, OH: 248,640 pounds35.

SCHUYLKILL, PA: 247,640 pounds36.

YABUCOA, PR: 241,000 pounds37.

EAST BATON ROUGE, LA: 240,986 pounds38.

HEMPSTEAD, AR: 238,756 pounds39.

DALLAS, TX: 235,924 pounds40.

PROVIDENCE, RI: 232,701 pounds41.

BROWN, TX: 223,200 pounds42.

PAYETTE, ID: 220,095 pounds43.

LEE, AL: 219,349 pounds44.

MARION, AL: 211,600 pounds45.

VICTORIA, TX: 208,720 pounds46.

POLK, GA: 204,047 pounds47.

ST. LOUIS, MO: 203,273 pounds48.

FORSYTH, NC: 200,006 pounds49.

LOS ANGELES, CA: 193,509 pounds50.

GENESEE, MI: 189,046 pounds51.

JEFFERSON, AL: 188,566 pounds52.

COLORADO, TX: 185,754 pounds53.

HARDY, WV: 182,173 pounds54.

SANDUSKY, OH: 181,421 pounds55.

BLACKFORD, IN: 181,088 pounds56.

DE KALB, IN: 180,318 pounds57.

CLARK, IN: 178,335 pounds58.




































MCLEOD, MN: 176,000 pounds59.

ROCKLAND, NY: 175,683 pounds60.

COWLITZ, WA: 172,503 pounds61.

KALKASKA, MI: 170,653 pounds62.

GASTON, NC: 169,292 pounds63.

AIKEN, SC: 168,000 pounds64.

ST. CHARLES, MO: 164,970 pounds65.

VERNON, MO: 163,700 pounds66.

BLACK HAWK, IA: 162,081 pounds67.

ALLEGHENY, PA: 160,598 pounds68.

BERKS, PA: 158,937 pounds69.

OKLAHOMA, OK: 150,994 pounds70.

COSHOCTON, OH: 149,856 pounds71.

MARION, IL: 149,462 pounds72.

HENRY, VA: 148,195 pounds73.

YOUNG, TX: 147,700 pounds74.

GILES, VA: 145,661 pounds75.

YORK, SC: 144,126 pounds76.

HARRISON, TX: 143,781 pounds77.

HARFORD, MD: 143,411 pounds78.

GUILFORD, NC: 142,014 pounds79.

SMYTH, VA: 138,967 pounds80.

ORANGEBURG, SC: 138,500 pounds81.

ANDERSON, SC: 138,390 pounds82.

WYANDOTTE, KS: 138,290 pounds83.

NOBLE, IN: 136,602 pounds84.

ROANE, WV: 135,126 pounds85.

NOBLE, OH: 134,443 pounds86.

BUCKS, PA: 133,661 pounds87.

CALDWELL, NC: 132,926 pounds88.

ORANGE, CA: 132,421 pounds89.

DOUGLAS, IL: 132,400 pounds90.

NEW MADRID, MO: 130,675 pounds91.




































MIDDLESEX, NJ: 127,767 pounds92.

FRANKLIN, OH: 126,940 pounds93.

WAYNE, MI: 124,469 pounds94.

OAKLAND, MI: 123,689 pounds95.

PERRY, MO: 122,987 pounds96.

SURRY, NC: 122,111 pounds97.

PETERSBURG (CITY), VA: 121,303 pounds98.

ELKHART, IN: 118,970 pounds99.

MILWAUKEE, WI: 116,492 pounds100.

















Zip Codes with Reported Total EnvironmentalReleasesof METHYL ETHYL KETONE (78-93-3) from the About The Chemicals section of Scorecard


in

(explain)

77701 (TX): 1,625,250 pounds1.

39703 (MS): 1,540,000 pounds2.

76305 (TX): 917,372 pounds3.

97503 (OR): 897,100 pounds4.

43608 (OH): 670,250 pounds5.

46394 (IN): 652,340 pounds6.

31709 (GA): 608,225 pounds7.

36305 (AL): 589,150 pounds8.

38834 (MS): 582,320 pounds9.

24523 (VA): 500,000 pounds10.

53589 (WI): 492,977 pounds11.

27509 (NC): 473,200 pounds12.

70601 (LA): 424,339 pounds13.

38063 (TN): 380,000 pounds14.

16373 (PA): 374,136 pounds15.

28451 (NC): 351,000 pounds16.

71109 (LA): 350,601 pounds17.

44483 (OH): 348,869 pounds18.

60426 (IL): 335,000 pounds19.

16344 (PA): 318,884 pounds20.

77536 (TX): 301,890 pounds21.

22601 (VA): 287,874 pounds22.

25430 (WV): 280,000 pounds23.

98203 (WA): 278,244 pounds24.

16749 (PA): 266,355 pounds25.

About The Chemicals: By ZIP Code




http://www.scorecard.org/env-releases/zip-code.tcl?zip_code=77701

























46368 (IN): 261,112 pounds26.

35405 (AL): 256,227 pounds27.

17922 (PA): 247,640 pounds28.

00767 (PR): 241,000 pounds29.

71801 (AR): 238,756 pounds30.

29303 (SC): 235,070 pounds31.

76801 (TX): 223,200 pounds32.

83619 (ID): 220,095 pounds33.

36803 (AL): 219,349 pounds34.

70805 (LA): 214,872 pounds35.

35661 (AL): 214,083 pounds36.

46506 (IN): 213,182 pounds37.

35563 (AL): 211,600 pounds38.

77901 (TX): 208,720 pounds39.

30153 (GA): 198,301 pounds40.

49512 (MI): 186,639 pounds41.

26836 (WV): 182,173 pounds42.

74107 (OK): 182,002 pounds43.

27105 (NC): 181,606 pounds44.

43420 (OH): 181,421 pounds45.

47348 (IN): 181,088 pounds46.

47130 (IN): 178,335 pounds47.

55350 (MN): 176,000 pounds48.

10962 (NY): 171,900 pounds49.

98632 (WA): 171,623 pounds50.

49646 (MI): 170,653 pounds51.

78962 (TX): 168,008 pounds52.

29829 (SC): 168,000 pounds53.

64772 (MO): 163,700 pounds54.

50703 (IA): 162,081 pounds55.

46706 (IN): 157,618 pounds56.

77640 (TX): 156,800 pounds57.

43812 (OH): 149,856 pounds58.




































62801 (IL): 149,462 pounds59.

76450 (TX): 147,700 pounds60.

67210 (KS): 147,000 pounds61.

29730 (SC): 144,126 pounds62.

21078 (MD): 143,411 pounds63.

02919 (RI): 139,959 pounds64.

19543 (PA): 139,668 pounds65.

24354 (VA): 138,967 pounds66.

29115 (SC): 138,000 pounds67.

29625 (SC): 137,139 pounds68.

35660 (AL): 136,168 pounds69.

25276 (WV): 135,126 pounds70.

43724 (OH): 134,443 pounds71.

61919 (IL): 132,400 pounds72.

63873 (MO): 130,675 pounds73.

48439 (MI): 129,046 pounds74.

46701 (IN): 128,128 pounds75.

63775 (MO): 122,987 pounds76.

24089 (VA): 120,616 pounds77.

28056 (NC): 120,000 pounds78.

43612 (OH): 119,144 pounds79.

28633 (NC): 118,648 pounds80.

15144 (PA): 118,605 pounds81.

77522 (TX): 118,524 pounds82.

98034 (WA): 115,000 pounds83.

24124 (VA): 112,143 pounds84.

73145 (OK): 112,000 pounds85.

55414 (MN): 110,732 pounds86.

01075 (MA): 109,025 pounds87.

25401 (WV): 108,953 pounds88.

18629 (PA): 106,012 pounds89.

38901 (MS): 105,509 pounds90.

23804 (VA): 104,477 pounds91.




































44102 (OH): 103,905 pounds92.

47001 (IN): 103,420 pounds93.

42348 (KY): 103,002 pounds94.

28621 (NC): 101,607 pounds95.

63043 (MO): 100,189 pounds96.

77055 (TX): 99,307 pounds97.

28105 (NC): 98,790 pounds98.

63376 (MO): 98,570 pounds99.

75606 (TX): 96,581 pounds100.

















Facilities with Reported Total EnvironmentalReleasesof METHYL ETHYL KETONE (78-93-3) from the About the Chemicals section of Scorecard


in

from

(explain)

MOBIL OIL BEAUMONT REFY., BEAUMONT, TX: 1,625,000 Pounds1.

GENCORP, COLUMBUS, MS: 1,540,000 Pounds2.

TEXAS RECREATION CORP., WICHITA FALLS, TX: 917,372 Pounds3.

IMATION ENTERPRISES CORP., WHITE CITY, OR: 897,100 Pounds4.

TEXTILEATHER CORP., TOLEDO, OH: 670,250 Pounds5.

AMOCO OIL CO., WHITING REFY., WHITING, IN: 652,340 Pounds6.

SONY MAGNETIC PRODS. INC. OF AMERICA, DOTHAN, AL: 589,150 Pounds7.

IPC CORINTH DIV. INC., CORINTH, MS: 582,320 Pounds8.

RUBATEX CORP. PLANT2, BEDFORD, VA: 500,000 Pounds9.

UNIROYAL ENGINEERED PRODS., STOUGHTON, WI: 492,977 Pounds10.

ATHOL CORP., BUTNER, NC: 473,200 Pounds11.

CITGO PETROLEUM CORP., LAKE CHARLES, LA: 421,919 Pounds12.

ALLIEDSIGNAL/ASTOR CORP., EMLENTON, PA: 374,136 Pounds13.

TEXTRON AUTOMOTIVE CO., AMERICUS, GA: 360,110 Pounds14.

TECHNICAL COATING INTL. INC., LELAND, NC: 351,000 Pounds15.

PENNZOIL-QUAKER STATE CO. SHREVEPORT REFY., SHREVEPORT, LA:350,601 Pounds

16.

ALCAN ALUMINUM CORP., WARREN, OH: 347,639 Pounds17.

ALLIED TUBE & CONDUIT CORP., HARVEY, IL: 335,000 Pounds18.

PENNZOIL-QUAKER STATE CO. ROUSEVILLE REFY. & PACKAGING,ROUSEVILLE, PA: 318,884 Pounds

19.

O'SULLIVAN CORP., WINCHESTER, VA: 287,874 Pounds20.

IMATION ENTS. CORP. MIDDLEWAY PLANT PLANT, KEARNEYSVILLE,WV: 280,000 Pounds

21.

About the Chemicals: By Facility

http://www.scorecard.org/chemical-profiles/rank-f...ates&sic_2=All%20reporting%20sectors&how_many=100 (1 of 4) [3/04/2001 7:57:08 PM]



http://www.scorecard.org/env-releases/facility.tcl?tri_id=77701BMNTREASTE

http://www.scorecard.org/env-releases/facility.tcl?tri_id=39702DVRSTYORKV

http://www.scorecard.org/env-releases/facility.tcl?tri_id=76305TXSRC908NO

http://www.scorecard.org/env-releases/facility.tcl?tri_id=97503MCMPN8124P

http://www.scorecard.org/env-releases/facility.tcl?tri_id=43608DVRST3729T

http://www.scorecard.org/env-releases/facility.tcl?tri_id=46394MCLC%202815I

http://www.scorecard.org/env-releases/facility.tcl?tri_id=36301SNYMGHWY84

http://www.scorecard.org/env-releases/facility.tcl?tri_id=38834PCCRNGOLDI

http://www.scorecard.org/env-releases/facility.tcl?tri_id=24523RBTXCRAILR

http://www.scorecard.org/env-releases/facility.tcl?tri_id=53589NRYLP501SW

http://www.scorecard.org/env-releases/facility.tcl?tri_id=27509THLMN10022

http://www.scorecard.org/env-releases/facility.tcl?tri_id=70602CTGPTHIGHW

http://www.scorecard.org/env-releases/facility.tcl?tri_id=16373QKRSTHILLS

http://www.scorecard.org/env-releases/facility.tcl?tri_id=31709DVDSNRT6BO

http://www.scorecard.org/env-releases/facility.tcl?tri_id=28451TCHNC150BA

http://www.scorecard.org/env-releases/facility.tcl?tri_id=71109TLSPR3333M

http://www.scorecard.org/env-releases/facility.tcl?tri_id=44483LCNRL390GR

http://www.scorecard.org/env-releases/facility.tcl?tri_id=60426LLDTB16100

http://www.scorecard.org/env-releases/facility.tcl?tri_id=16344PNNZL2MAIN

http://www.scorecard.org/env-releases/facility.tcl?tri_id=22601SLLVN1944V

http://www.scorecard.org/env-releases/facility.tcl?tri_id=25414MNNSTPOBOX

BOEING COMMERCIAL AIRPLANE GROUP - EVERETT, EVERETT, WA:278,244 Pounds

22.

ALLIED-SIGNAL ASTOR CORP. MCKEAN PLANT, SMETHPORT, PA: 266,355Pounds

23.

SHELL CHEMICAL CO. DEER PARK, DEER PARK, TX: 266,231 Pounds24.

SEQUA COATINGS CORP., PRECOAT METALS DIV., PORTAGE, IN: 261,112Pounds

25.

JVC MAGNETICS AMERICA CO., TUSCALOOSA, AL: 256,227 Pounds26.

WOODGRAIN MILLWORK INC., AMERICUS, GA: 248,115 Pounds27.

GENCORP/AUBURN PLANT, AUBURN, PA: 247,640 Pounds28.

PUERTO RICO SUN OIL CO., YABUCOA, PR: 241,000 Pounds29.

BRENTWOOD IND. INC., HOPE, AR: 238,635 Pounds30.

REXAM INC. CUSTOM DIV., SPARTANBURG, SC: 235,070 Pounds31.

3M CO., BROWNWOOD, TX: 223,200 Pounds32.

WOODGRAIN MILLWORK INC., MILLWORK & PREFINISH DIVISIONS,FRUITLAND, ID: 220,095 Pounds

33.

QUANTEGY INC., OPELIKA, AL: 219,349 Pounds34.

REYNOLDS METALS CO. - ALLOYS PLANT, MUSCLE SHOALS, AL: 214,083Pounds

35.

BREMEN CORP., BREMEN, IN: 213,182 Pounds36.

3M, GUIN, AL: 211,600 Pounds37.

DU PONT VICTORIA PLANT, VICTORIA, TX: 207,900 Pounds38.

ENGINEERED FABRICS CORP., ROCKMART, GA: 198,301 Pounds39.

SR OF TENNESSEE, RIPLEY, TN: 193,950 Pounds40.

TENNESSEE ELECTROPLATING, RIPLEY, TN: 186,050 Pounds41.

AMERICAN WOODMARK CORP., MOOREFIELD, WV: 182,173 Pounds42.

AEROQUIP INOAC CO., FREMONT, OH: 181,421 Pounds43.

3M, HARTFORD CITY PLANT, HARTFORD CITY, IN: 181,088 Pounds44.

EXXON CO. USA BATON ROUGE REFY., BATON ROUGE, LA: 179,471 Pounds45.

3M HUTCHINSON, HUTCHINSON, MN: 176,000 Pounds46.

PAXAR CORP., ORANGEBURG, NY: 171,900 Pounds47.

WEYERHAEUSER CO., LONGVIEW, WA: 171,623 Pounds48.

ITW CODING PRODS., KALKASKA, MI: 170,653 Pounds49.

R. J. REYNOLDS TOBACCO CO., WINSTON-SALEM, NC: 170,006 Pounds50.



http://www.scorecard.org/env-releases/facility.tcl?tri_id=98203BNGCM3003W

http://www.scorecard.org/env-releases/facility.tcl?tri_id=16749QKRSTINTER

http://www.scorecard.org/env-releases/facility.tcl?tri_id=77536SHLLLHIGHW

http://www.scorecard.org/env-releases/facility.tcl?tri_id=46368NMLPRUSHWY

http://www.scorecard.org/env-releases/facility.tcl?tri_id=35405JVCMG1JVCR

http://www.scorecard.org/env-releases/facility.tcl?tri_id=31709WDGRNNEWIN

http://www.scorecard.org/env-releases/facility.tcl?tri_id=17922RNRFLHICKO

http://www.scorecard.org/env-releases/facility.tcl?tri_id=00767YBCSNROUTE

http://www.scorecard.org/env-releases/facility.tcl?tri_id=71801BRNTW118IN

http://www.scorecard.org/env-releases/facility.tcl?tri_id=29303RXHMN5670N

http://www.scorecard.org/env-releases/facility.tcl?tri_id=76804MCMPNCAMPB

http://www.scorecard.org/env-releases/facility.tcl?tri_id=83619WDGRN300NW

http://www.scorecard.org/env-releases/facility.tcl?tri_id=36803MPXCR2230M

http://www.scorecard.org/env-releases/facility.tcl?tri_id=35660RYNLDEAST2

http://www.scorecard.org/env-releases/facility.tcl?tri_id=46506CRTVF405NI

http://www.scorecard.org/env-releases/facility.tcl?tri_id=35563M%20%20%20%20HIGHW

http://www.scorecard.org/env-releases/facility.tcl?tri_id=77902DPNTVOLDBL

http://www.scorecard.org/env-releases/facility.tcl?tri_id=30153LRLNGGOODY

http://www.scorecard.org/env-releases/facility.tcl?tri_id=38063SRFTNOLDHI

http://www.scorecard.org/env-releases/facility.tcl?tri_id=38040TNNSSVIARR

http://www.scorecard.org/env-releases/facility.tcl?tri_id=26836MRCNWROUTE

http://www.scorecard.org/env-releases/facility.tcl?tri_id=43420STRLN1410M

http://www.scorecard.org/env-releases/facility.tcl?tri_id=47348M%20%20%20%200304S

http://www.scorecard.org/env-releases/facility.tcl?tri_id=70805XXNBT4050S

http://www.scorecard.org/env-releases/facility.tcl?tri_id=55350MMGMDHIGHW

http://www.scorecard.org/env-releases/facility.tcl?tri_id=10962PXRCR530RT

http://www.scorecard.org/env-releases/facility.tcl?tri_id=98632WYRHS3401I

http://www.scorecard.org/env-releases/facility.tcl?tri_id=49646CDNGP111WP

http://www.scorecard.org/env-releases/facility.tcl?tri_id=27105RJRYN1101R

UTEX IND. INC., WEIMAR, TX: 168,008 Pounds51.

AVONDALE MILLS INC.-WOODHEAD, GRANITEVILLE, SC: 168,000 Pounds52.

SUNOCO INC., TULSA, OK: 163,706 Pounds53.

3M NEVADA PLANT, NEVADA, MO: 163,700 Pounds54.

QUALITY MAT CO. INC., WATERLOO, IA: 162,081 Pounds55.

MOTIVA PORT ARTHUR REFY., PORT ARTHUR, TX: 156,800 Pounds56.

BOEING CO. - WICHITA DIV., WICHITA, KS: 147,000 Pounds57.

CYTEC FIBERITE INC., HAVRE DE GRACE, MD: 143,411 Pounds58.

TEXAS RECREATION CORP., GRAHAM, TX: 140,300 Pounds59.

REXAM DSI, JOHNSTON, RI: 139,959 Pounds60.

CHIYODA AMERICA INC., MORGANTOWN, PA: 139,668 Pounds61.

DECOLAM INC., ORANGEBURG, SC: 138,000 Pounds62.

VYTECH IND. INC., ANDERSON, SC: 137,139 Pounds63.

REYNOLDS METALS CO. - SHEFFIELD PLANT, SHEFFIELD, AL: 136,168Pounds

64.

BF GOODRICH AEROSPACE, SPENCER, WV: 135,126 Pounds65.

INTERNATIONAL CONVERTER INC., CALDWELL, OH: 134,443 Pounds66.

CELANESE ACETATE L.L.C. CELRIVER PLANT, ROCK HILL, SC: 132,724Pounds

67.

FABRIONICS INC., CAMARGO, IL: 132,400 Pounds68.

VEMCO INC., GRAND BLANC, MI: 129,046 Pounds69.

DEXTER AXLE CO., ALBION, IN: 128,128 Pounds70.

TG USA CORP., PERRYVILLE, MO: 122,987 Pounds71.

COURTAULDS PERFORMANCE FILMS INC. PLANT II, FIELDALE, VA:120,616 Pounds

72.

RANCH IND., GASTONIA, NC: 120,000 Pounds73.

CROWN CORK & SEAL CO. INC., TOLEDO, OH: 119,144 Pounds74.

MARION COMPOSITES, MARION, VA: 119,000 Pounds75.

PPG INDS. INC. SPRINGDALE COMPLEX, SPRINGDALE, PA: 118,605 Pounds76.

EXXON BAYTOWN REFY., BAYTOWN, TX: 117,022 Pounds77.

AMERICAN MILLWORK INC., KIRKLAND, WA: 115,000 Pounds78.

CELANESE ACETATE - CELCO PLANT, NARROWS, VA: 112,143 Pounds79.

U.S. AIR FORCE, TINKER AIR FORCE BASE, OKLAHOMA CITY, OK: 112,000Pounds

80.



http://www.scorecard.org/env-releases/facility.tcl?tri_id=78962TXNDS605UT

http://www.scorecard.org/env-releases/facility.tcl?tri_id=29829GRNTVNEWTO

http://www.scorecard.org/env-releases/facility.tcl?tri_id=74107SNRFN1700S

http://www.scorecard.org/env-releases/facility.tcl?tri_id=64772MNVDPHIGHW

http://www.scorecard.org/env-releases/facility.tcl?tri_id=50703QLTYM410RA

http://www.scorecard.org/env-releases/facility.tcl?tri_id=77640TXCRFNORTH

http://www.scorecard.org/env-releases/facility.tcl?tri_id=67277BNGML3801S

http://www.scorecard.org/env-releases/facility.tcl?tri_id=21078MRCNC1300R

http://www.scorecard.org/env-releases/facility.tcl?tri_id=76450TXSRC316NC

http://www.scorecard.org/env-releases/facility.tcl?tri_id=02919JMSRVGOLDS

http://www.scorecard.org/env-releases/facility.tcl?tri_id=19543DVNCDTHOUS

http://www.scorecard.org/env-releases/facility.tcl?tri_id=29115DCLMNFIVEC

http://www.scorecard.org/env-releases/facility.tcl?tri_id=29623STFFRPEARM

http://www.scorecard.org/env-releases/facility.tcl?tri_id=35660RYNLD501W2

http://www.scorecard.org/env-releases/facility.tcl?tri_id=25276BF%20%20%20ROANE

http://www.scorecard.org/env-releases/facility.tcl?tri_id=43724NRNDLNOBLE

http://www.scorecard.org/env-releases/facility.tcl?tri_id=29730HCHST2850C

http://www.scorecard.org/env-releases/facility.tcl?tri_id=61919FBRNCRT130

http://www.scorecard.org/env-releases/facility.tcl?tri_id=48439VMCNC10230

http://www.scorecard.org/env-releases/facility.tcl?tri_id=46701PHLPSCR75E

http://www.scorecard.org/env-releases/facility.tcl?tri_id=63775TGSCR2200P

http://www.scorecard.org/env-releases/facility.tcl?tri_id=24089MRTNPRTE68

http://www.scorecard.org/env-releases/facility.tcl?tri_id=28054RCHND6048S

http://www.scorecard.org/env-releases/facility.tcl?tri_id=43612TLDPL5201E

http://www.scorecard.org/env-releases/facility.tcl?tri_id=24354BRNSW150JO

http://www.scorecard.org/env-releases/facility.tcl?tri_id=15144PPGND125CO

http://www.scorecard.org/env-releases/facility.tcl?tri_id=77522XXNBY2800D

http://www.scorecard.org/env-releases/facility.tcl?tri_id=98034MRCNM11615

http://www.scorecard.org/env-releases/facility.tcl?tri_id=24124HCHSTRT460

http://www.scorecard.org/env-releases/facility.tcl?tri_id=73145TNKRR8745E

RIEKE CORP., AUBURN, IN: 111,618 Pounds81.

AMERICAN NATL. CAN CO. - PPMM, MINNEAPOLIS, MN: 110,732 Pounds82.

SWAN CORP., CENTRALIA, IL: 110,516 Pounds83.

STONE CONTAINER CORP., COSHOCTON, OH: 110,181 Pounds84.

REXAM GRAPHICS, SOUTH HADLEY, MA: 109,025 Pounds85.

BRENTWOOD INDS. INC., MARTINSBURG, WV: 108,953 Pounds86.

PROCTER & GAMBLE PAPER PRODS. CO., MEHOOPANY, PA: 106,012Pounds

87.

HEATCRAFT INC., GRENADA, MS: 105,509 Pounds88.

BRENCO INC., PETERSBURG, VA: 104,477 Pounds89.

AMERICAN NATL. CAN CO. - PPCO, CLEVELAND, OH: 103,905 Pounds90.

AURORA CASKET CO. INC., AURORA, IN: 103,420 Pounds91.

ARVIN ROLL COATER HAWESVILLE FACILITY, HAWESVILLE, KY: 103,002Pounds

92.

TRANSFORMER MATERIALS CO., MARYLAND HEIGHTS, MO: 99,070Pounds

93.

REXAM INC., CUSTOM DIV., MATTHEWS, NC: 98,790 Pounds94.

TRANSFORMER MATERIALS CO., SAINT PETERS, MO: 98,570 Pounds95.

PLASTENE SUPPLY CO., PORTAGEVILLE, MO: 98,180 Pounds96.

KITCHEN KOMPACT, JEFFERSONVILLE, IN: 98,000 Pounds97.

STEMCO INC., LONGVIEW, TX: 96,581 Pounds98.

AMERICAN REFINING GROUP INC., BRADFORD, PA: 96,000 Pounds99.

KEN-KOAT INC., HUNTINGTON, IN: 92,731 Pounds100.





http://www.scorecard.org/env-releases/facility.tcl?tri_id=46706RKCRP500WE

http://www.scorecard.org/env-releases/facility.tcl?tri_id=55414MRCNN15026

http://www.scorecard.org/env-releases/facility.tcl?tri_id=62801SWNCROLDRT

http://www.scorecard.org/env-releases/facility.tcl?tri_id=43812STNCN500N4

http://www.scorecard.org/env-releases/facility.tcl?tri_id=01075JMSRV28GAY

http://www.scorecard.org/env-releases/facility.tcl?tri_id=25401BRNTW2011I

http://www.scorecard.org/env-releases/facility.tcl?tri_id=18629PRCTRROUTE

http://www.scorecard.org/env-releases/facility.tcl?tri_id=38901HTCRFHIGHW

http://www.scorecard.org/env-releases/facility.tcl?tri_id=23804BRNCNPETER

http://www.scorecard.org/env-releases/facility.tcl?tri_id=44102MRCNN5300D

http://www.scorecard.org/env-releases/facility.tcl?tri_id=47001RRCSKUS50W

http://www.scorecard.org/env-releases/facility.tcl?tri_id=42348WRLDS45RIV

http://www.scorecard.org/env-releases/facility.tcl?tri_id=63043TRNSF11445

http://www.scorecard.org/env-releases/facility.tcl?tri_id=28105RXHMC700CR

http://www.scorecard.org/env-releases/facility.tcl?tri_id=63376TRNSF601AR

http://www.scorecard.org/env-releases/facility.tcl?tri_id=63873PLSTN101ME

http://www.scorecard.org/env-releases/facility.tcl?tri_id=47131KTCHNPOBOX

http://www.scorecard.org/env-releases/facility.tcl?tri_id=75606STMCN300IN

http://www.scorecard.org/env-releases/facility.tcl?tri_id=16701KNDLL77NKE

http://www.scorecard.org/env-releases/facility.tcl?tri_id=46750KNKTN1605R




Industrial Sectors with Reported TotalEnvironmental Releasesof METHYL ETHYL KETONE (78-93-3) by Industrial Sector (2-digit SIC) from the About theChemicals section of Scorecard


in

(explain)

30: Rubber And Misc. Plastics Products : 8,561,319 pounds1.

37: Transportation Equipment : 5,731,434 pounds2.

29: Petroleum And Coal Products : 5,336,062 pounds3.

34: Fabricated Metal Products : 4,557,156 pounds4.

22: Textile Mill Products : 3,959,913 pounds5.

28: Chemicals And Allied Products : 3,683,710 pounds6.

26: Paper And Allied Products : 3,211,672 pounds7.

36: Electronic & Other Electric Equipment : 1,672,577 pounds8.

24: Lumber And Wood Products : 1,620,634 pounds9.

33: Primary Metal Industries : 1,332,806 pounds10.

35: Industrial Machinery And Equipment : 1,183,339 pounds11.

38: Instruments And Related Products : 1,182,495 pounds12.

39: Miscellaneous Manufacturing Industries : 1,152,016 pounds13.

25: Furniture And Fixtures : 1,143,512 pounds14.

27: Printing And Publishing : 890,564 pounds15.

32: Stone, Clay, And Glass Products : 425,641 pounds16.

97: National Security And Intl. Affairs : 412,623 pounds17.

31: Leather And Leather Products : 315,222 pounds18.

21: Tobacco Products : 179,406 pounds19.

51: Wholesale Trade--Nondurable Goods : 168,910 pounds20.

17: Special Trade Contractors : 125,125 pounds21.

49: Electric, Gas, And Sanitary Services : 86,538 pounds22.

NA: Not reported : 66,268 pounds23.

23: Apparel And Other Textile Products : 54,214 pounds24.

About the Chemicals: By Industrial Sector (2-Digit SIC)





http://www.scorecard.org/chemical-profiles/rank-industrial-subsectors.tcl?how_many=100&type=mass&category=total%5fenv&modifier=na&fips_state_code=Entire%20United%20States&edf_substance_id=78%2d93%2d3&edf_chem_name=METHYL%20ETHYL%20KETONE&sic_2=30&sic_desc=Rubber%20And%20Misc%2e%20Plastics%20Products%0d

http://www.scorecard.org/chemical-profiles/rank-industrial-subsectors.tcl?how_many=100&type=mass&category=total%5fenv&modifier=na&fips_state_code=Entire%20United%20States&edf_substance_id=78%2d93%2d3&edf_chem_name=METHYL%20ETHYL%20KETONE&sic_2=37&sic_desc=Transportation%20Equipment%0d

http://www.scorecard.org/chemical-profiles/rank-industrial-subsectors.tcl?how_many=100&type=mass&category=total%5fenv&modifier=na&fips_state_code=Entire%20United%20States&edf_substance_id=78%2d93%2d3&edf_chem_name=METHYL%20ETHYL%20KETONE&sic_2=29&sic_desc=Petroleum%20And%20Coal%20Products%0d

http://www.scorecard.org/chemical-profiles/rank-industrial-subsectors.tcl?how_many=100&type=mass&category=total%5fenv&modifier=na&fips_state_code=Entire%20United%20States&edf_substance_id=78%2d93%2d3&edf_chem_name=METHYL%20ETHYL%20KETONE&sic_2=34&sic_desc=Fabricated%20Metal%20Products%0d

http://www.scorecard.org/chemical-profiles/rank-industrial-subsectors.tcl?how_many=100&type=mass&category=total%5fenv&modifier=na&fips_state_code=Entire%20United%20States&edf_substance_id=78%2d93%2d3&edf_chem_name=METHYL%20ETHYL%20KETONE&sic_2=22&sic_desc=Textile%20Mill%20Products%0d

http://www.scorecard.org/chemical-profiles/rank-industrial-subsectors.tcl?how_many=100&type=mass&category=total%5fenv&modifier=na&fips_state_code=Entire%20United%20States&edf_substance_id=78%2d93%2d3&edf_chem_name=METHYL%20ETHYL%20KETONE&sic_2=28&sic_desc=Chemicals%20And%20Allied%20Products%0d

http://www.scorecard.org/chemical-profiles/rank-industrial-subsectors.tcl?how_many=100&type=mass&category=total%5fenv&modifier=na&fips_state_code=Entire%20United%20States&edf_substance_id=78%2d93%2d3&edf_chem_name=METHYL%20ETHYL%20KETONE&sic_2=26&sic_desc=Paper%20And%20Allied%20Products%0d

http://www.scorecard.org/chemical-profiles/rank-industrial-subsectors.tcl?how_many=100&type=mass&category=total%5fenv&modifier=na&fips_state_code=Entire%20United%20States&edf_substance_id=78%2d93%2d3&edf_chem_name=METHYL%20ETHYL%20KETONE&sic_2=36&sic_desc=Electronic%20%26%20Other%20Electric%20Equipment%0d

http://www.scorecard.org/chemical-profiles/rank-industrial-subsectors.tcl?how_many=100&type=mass&category=total%5fenv&modifier=na&fips_state_code=Entire%20United%20States&edf_substance_id=78%2d93%2d3&edf_chem_name=METHYL%20ETHYL%20KETONE&sic_2=24&sic_desc=Lumber%20And%20Wood%20Products%0d

http://www.scorecard.org/chemical-profiles/rank-industrial-subsectors.tcl?how_many=100&type=mass&category=total%5fenv&modifier=na&fips_state_code=Entire%20United%20States&edf_substance_id=78%2d93%2d3&edf_chem_name=METHYL%20ETHYL%20KETONE&sic_2=33&sic_desc=Primary%20Metal%20Industries%0d

http://www.scorecard.org/chemical-profiles/rank-industrial-subsectors.tcl?how_many=100&type=mass&category=total%5fenv&modifier=na&fips_state_code=Entire%20United%20States&edf_substance_id=78%2d93%2d3&edf_chem_name=METHYL%20ETHYL%20KETONE&sic_2=35&sic_desc=Industrial%20Machinery%20And%20Equipment%0d

http://www.scorecard.org/chemical-profiles/rank-industrial-subsectors.tcl?how_many=100&type=mass&category=total%5fenv&modifier=na&fips_state_code=Entire%20United%20States&edf_substance_id=78%2d93%2d3&edf_chem_name=METHYL%20ETHYL%20KETONE&sic_2=38&sic_desc=Instruments%20And%20Related%20Products%0d

http://www.scorecard.org/chemical-profiles/rank-industrial-subsectors.tcl?how_many=100&type=mass&category=total%5fenv&modifier=na&fips_state_code=Entire%20United%20States&edf_substance_id=78%2d93%2d3&edf_chem_name=METHYL%20ETHYL%20KETONE&sic_2=39&sic_desc=Miscellaneous%20Manufacturing%20Industries%0d

http://www.scorecard.org/chemical-profiles/rank-industrial-subsectors.tcl?how_many=100&type=mass&category=total%5fenv&modifier=na&fips_state_code=Entire%20United%20States&edf_substance_id=78%2d93%2d3&edf_chem_name=METHYL%20ETHYL%20KETONE&sic_2=25&sic_desc=Furniture%20And%20Fixtures%0d

http://www.scorecard.org/chemical-profiles/rank-industrial-subsectors.tcl?how_many=100&type=mass&category=total%5fenv&modifier=na&fips_state_code=Entire%20United%20States&edf_substance_id=78%2d93%2d3&edf_chem_name=METHYL%20ETHYL%20KETONE&sic_2=27&sic_desc=Printing%20And%20Publishing%0d

http://www.scorecard.org/chemical-profiles/rank-industrial-subsectors.tcl?how_many=100&type=mass&category=total%5fenv&modifier=na&fips_state_code=Entire%20United%20States&edf_substance_id=78%2d93%2d3&edf_chem_name=METHYL%20ETHYL%20KETONE&sic_2=32&sic_desc=Stone%2c%20Clay%2c%20And%20Glass%20Products%0d

http://www.scorecard.org/chemical-profiles/rank-industrial-subsectors.tcl?how_many=100&type=mass&category=total%5fenv&modifier=na&fips_state_code=Entire%20United%20States&edf_substance_id=78%2d93%2d3&edf_chem_name=METHYL%20ETHYL%20KETONE&sic_2=97&sic_desc=National%20Security%20And%20Intl%2e%20Affairs%0d

http://www.scorecard.org/chemical-profiles/rank-industrial-subsectors.tcl?how_many=100&type=mass&category=total%5fenv&modifier=na&fips_state_code=Entire%20United%20States&edf_substance_id=78%2d93%2d3&edf_chem_name=METHYL%20ETHYL%20KETONE&sic_2=31&sic_desc=Leather%20And%20Leather%20Products%0d

http://www.scorecard.org/chemical-profiles/rank-industrial-subsectors.tcl?how_many=100&type=mass&category=total%5fenv&modifier=na&fips_state_code=Entire%20United%20States&edf_substance_id=78%2d93%2d3&edf_chem_name=METHYL%20ETHYL%20KETONE&sic_2=21&sic_desc=Tobacco%20Products%0d

http://www.scorecard.org/chemical-profiles/rank-industrial-subsectors.tcl?how_many=100&type=mass&category=total%5fenv&modifier=na&fips_state_code=Entire%20United%20States&edf_substance_id=78%2d93%2d3&edf_chem_name=METHYL%20ETHYL%20KETONE&sic_2=51&sic_desc=Wholesale%20Trade%2d%2dNondurable%20Goods%0d

http://www.scorecard.org/chemical-profiles/rank-industrial-subsectors.tcl?how_many=100&type=mass&category=total%5fenv&modifier=na&fips_state_code=Entire%20United%20States&edf_substance_id=78%2d93%2d3&edf_chem_name=METHYL%20ETHYL%20KETONE&sic_2=17&sic_desc=Special%20Trade%20Contractors%0d

http://www.scorecard.org/chemical-profiles/rank-industrial-subsectors.tcl?how_many=100&type=mass&category=total%5fenv&modifier=na&fips_state_code=Entire%20United%20States&edf_substance_id=78%2d93%2d3&edf_chem_name=METHYL%20ETHYL%20KETONE&sic_2=49&sic_desc=Electric%2c%20Gas%2c%20And%20Sanitary%20Services%0d

http://www.scorecard.org/chemical-profiles/rank-industrial-subsectors.tcl?how_many=100&type=mass&category=total%5fenv&modifier=na&fips_state_code=Entire%20United%20States&edf_substance_id=78%2d93%2d3&edf_chem_name=METHYL%20ETHYL%20KETONE&sic_2=NA&sic_desc=Not%20reported%0d

http://www.scorecard.org/chemical-profiles/rank-industrial-subsectors.tcl?how_many=100&type=mass&category=total%5fenv&modifier=na&fips_state_code=Entire%20United%20States&edf_substance_id=78%2d93%2d3&edf_chem_name=METHYL%20ETHYL%20KETONE&sic_2=23&sic_desc=Apparel%20And%20Other%20Textile%20Products%0d

73: Business Services : 17,918 pounds25.

87: Engineering & Management Services : 9,953 pounds26.

45: Transportation By Air : 8,800 pounds27.

96: Administration Of Economic Programs : 7,963 pounds28.

20: Food And Kindred Products : 4,647 pounds29.

76: Miscellaneous Repair Services : 3,778 pounds30.

42: Trucking And Warehousing : 10 pounds31.



About the Chemicals: By Industrial Sector (2-Digit SIC)


http://www.scorecard.org/chemical-profiles/rank-industrial-subsectors.tcl?how_many=100&type=mass&category=total%5fenv&modifier=na&fips_state_code=Entire%20United%20States&edf_substance_id=78%2d93%2d3&edf_chem_name=METHYL%20ETHYL%20KETONE&sic_2=73&sic_desc=Business%20Services%0d

http://www.scorecard.org/chemical-profiles/rank-industrial-subsectors.tcl?how_many=100&type=mass&category=total%5fenv&modifier=na&fips_state_code=Entire%20United%20States&edf_substance_id=78%2d93%2d3&edf_chem_name=METHYL%20ETHYL%20KETONE&sic_2=87&sic_desc=Engineering%20%26%20Management%20Services%0d

http://www.scorecard.org/chemical-profiles/rank-industrial-subsectors.tcl?how_many=100&type=mass&category=total%5fenv&modifier=na&fips_state_code=Entire%20United%20States&edf_substance_id=78%2d93%2d3&edf_chem_name=METHYL%20ETHYL%20KETONE&sic_2=45&sic_desc=Transportation%20By%20Air%0d

http://www.scorecard.org/chemical-profiles/rank-industrial-subsectors.tcl?how_many=100&type=mass&category=total%5fenv&modifier=na&fips_state_code=Entire%20United%20States&edf_substance_id=78%2d93%2d3&edf_chem_name=METHYL%20ETHYL%20KETONE&sic_2=96&sic_desc=Administration%20Of%20Economic%20Programs%0d

http://www.scorecard.org/chemical-profiles/rank-industrial-subsectors.tcl?how_many=100&type=mass&category=total%5fenv&modifier=na&fips_state_code=Entire%20United%20States&edf_substance_id=78%2d93%2d3&edf_chem_name=METHYL%20ETHYL%20KETONE&sic_2=20&sic_desc=Food%20And%20Kindred%20Products%0d

http://www.scorecard.org/chemical-profiles/rank-industrial-subsectors.tcl?how_many=100&type=mass&category=total%5fenv&modifier=na&fips_state_code=Entire%20United%20States&edf_substance_id=78%2d93%2d3&edf_chem_name=METHYL%20ETHYL%20KETONE&sic_2=76&sic_desc=Miscellaneous%20Repair%20Services%0d

http://www.scorecard.org/chemical-profiles/rank-industrial-subsectors.tcl?how_many=100&type=mass&category=total%5fenv&modifier=na&fips_state_code=Entire%20United%20States&edf_substance_id=78%2d93%2d3&edf_chem_name=METHYL%20ETHYL%20KETONE&sic_2=42&sic_desc=Trucking%20And%20Warehousing%0d




Regulatory Coverageof METHYL ETHYL KETONE (78-93-3) from Scorecard

Federal Regulatory Program Lists

Air Contaminants (Occupational and Safety Health Act)●

Hazardous Air Pollutants (Clean Air Act)●

Hazardous Constituents (Resource Conservation and Recovery Act)●

Hazardous Substances (Superfund)●

Toxic Release Inventory Chemicals

California State Regulatory Program Lists

●

California Air Toxics "Hot Spots" Chemicals (Assembly Bill 2588)●

California Toxic Air Contaminants (Assembly Bill 1807)●


METHYL ETHYL KETONE -- Regulatory Coverage

http://www.scorecard.org/chemical-profiles/regulation.tcl?edf_substance_id=78%2d93%2d3 [3/04/2001 7:57:12 PM]

http://www.scorecard.org/chemical-groups/one-list.tcl?short_list_name=ac

http://www.scorecard.org/chemical-groups/one-list.tcl?short_list_name=hap

http://www.scorecard.org/chemical-groups/one-list.tcl?short_list_name=hc

http://www.scorecard.org/chemical-groups/one-list.tcl?short_list_name=hs

http://www.scorecard.org/chemical-groups/one-list.tcl?short_list_name=tri

http://www.scorecard.org/chemical-groups/one-list.tcl?short_list_name=aths

http://www.scorecard.org/chemical-groups/one-list.tcl?short_list_name=tac



Basic Testing to Identify Chemical Hazardsfor METHYL ETHYL KETONE (78-93-3) from Scorecard

The U.S. EPA conducted a comprehensive review of publicly available chemical testing data in 1997 toexamine whether the basic information needed to identify chemical hazards is available for highproduction volume chemicals. EPA searched major chemical databases to determine if the following testshad been conducted on a chemical:

Acute toxicity●

Chronic toxicity●

Neurotoxicity●

Developmental or reproductive toxicity●

Mutagenicity●

Carcinogenicity●

Ecotoxicity●

Environmental fate●

The following basic tests to identify chemical hazards have either not been conducted or are not publiclyavailable:

Carcinogenicity●

More on the importance of basic toxicity testing

Reference

EPA. Chemical Hazard Data Availability Study: High Production Volume (HPV) Chemicals and SIDSTestingOffice of Pollution Prevention and Toxics, EPA,Washington, DC. 1998.


METHYL ETHYL KETONE -- Testing

http://www.scorecard.org/chemical-profiles/test-detail.tcl?edf_substance_id=78%2d93%2d3 [3/04/2001 7:57:14 PM]

http://www.scorecard.org/chemical-profiles/def/basic_det.html

http://www.epa.gov/opptintr/chemtest/hazchem.htm

http://www.epa.gov/opptintr/chemtest/hazchem.htm



Safety Assessment Datafor METHYL ETHYL KETONE (78-93-3) from Scorecard

Are Risk Assessment Values Available?

Health Risk of Concern Inhalation Ingestion

Cancer Not a recognized carcinogen Not a recognized carcinogenNoncancer Yes Yes

Are Exposure Data Available?

Type of Exposure

Inhalation - ambient air Monitoring data available in some statesInhalation - indoor air NoIngestion No

● See the data US EPA possesses for safety assessment.


METHYL ETHYL KETONE -- Safety Assessment Data

http://www.scorecard.org/chemical-profiles/safety-detail.tcl?edf_substance_id=78%2d93%2d3 [3/04/2001 7:57:15 PM]



http://www.scorecard.org/chemical-profiles/def/assess_exp.html#air

http://www.scorecard.org/chemical-profiles/national-risk-characterization.tcl?edf_substance_id=78%2d93%2d3



Scorecard Risk Characterization Datafor METHYL ETHYL KETONE (78-93-3) from Scorecard

Risk Assessment Values or Standards

Value Units Reference

Inhalation cancer risk value(potency)

Not a recognized orsuspect carcinogen

Inhalation noncancer risk value(reference concentration)

10000 ug/m3 OEHHA99-REL

National ambient air qualitystandard

Gap in regulatorycoverage

Ingestion cancer risk value(potency)

Not a recognized orsuspect carcinogen

Ingestion noncancer risk value(reference dose)

0.6 mg/kg-day IRIS-HEAST

National water quality standard 7.5 mg/L EPA-HA

See the data US EPA possesses for safety assessment.


METHYL ETHYL KETONE -- Scorecard Risk Characterization Data

http://www.scorecard.org/chemical-profiles/edf-risk-characterization.tcl?edf_substance_id=78%2d93%2d3 [3/04/2001 7:57:16 PM]

http://www.scorecard.org/chemical-profiles/def/rav_edf.html

http://www.scorecard.org/chemical-profiles/ref/rav_edf.html

http://www.scorecard.org/chemical-profiles/ref/rav_us.html

http://www.scorecard.org/chemical-profiles/ref/std.html

http://www.scorecard.org/chemical-profiles/national-risk-characterization.tcl?edf_substance_id=78%2d93%2d3



Chemical Classesfor METHYL ETHYL KETONE (78-93-3) from Scorecard

Note that METHYL ETHYL KETONE may be a member of thefollowing classes:

VOLATILE ORGANIC COMPOUNDS●


METHYL ETHYL KETONE -- Classes

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ToxFAQs

2-ButanoneCAS# 78-93-3

September 1995

2-ButanoneC4H8OStereo ImageXYZ File

NFPA Label Key

Material Safety Data Sheet(University of Utah)

Agency for Toxic Substances and Disease Registry

This fact sheet answers the most frequently asked health questions about 2-butanone. For moreinformation, you may call the ATSDR Information Center at 1-800-447-1544. This fact sheet is one ina series of summaries about hazardous substances and their health effects. This information isimportant because this substance may harm you. The effects of exposure to any hazardous substancedepend on the dose, the duration, how you are exposed, personal traits and habits, and whether otherchemicals are present.

SUMMARY: Exposure to 2-butanone occurs in the workplace or from using consumerproducts containing it. Mild irritations of the eyes, nose, and throat were seen in peoplewho breathed 2-butanone. This chemical has been found in at least 472 of 1,416 NationalPriorities List sites identified by the Environmental Protection Agency.

What is 2-butanone?(Pronounced 2-byoo'ta-no-n)

2-Butanone is a manufactured chemical but it is also present in the environment from natural sources. Itis a colorless liquid with a sharp, sweet odor. It is also known as methyl ethyl ketone (MEK).

ATSDR - ToxFAQs - 2-Butanone

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2-Butanone is produced in large quantities. Nearly half of its use is in paints and other coatings because itwill quickly evaporate into the air and it dissolves many substances. It is also used in glues and as acleaning agent.

2-Butanone occurs as a natural product. It is made by some trees and found in some fruits and vegetablesin small amounts. It is also released to the air from car and truck exhausts.

What happens to 2-butanone when it enters the environment?2-Butanone enters the air during production, use and transport, and from hazardous waste sites.●

In air, one-half of it will break down from sunlight in 1 day or less.●

It dissolves in water and is broken down more slowly to a simpler chemical form in about 2 weeks.●

It does not stick to soil and will travel through the soil to the groundwater.●

Some of the 2-butanone in soil or water will evaporate into the air.●

It does not deposit in the bottom of rivers or lakes.●

It is not expected to concentrate in fish or increase in the tissues of animals further up the foodchain.

●

How might I be exposed to 2-butanone?Breathing contaminated air from the production or use of paints, glues, coatings, or cleaningagents containing it

●

Breathing contaminated air near hazardous waste sites●

Breathing cigarette smoke●

Sniffing glues●

Drinking contaminated water from wells near manufacturing or hazardous waste sites●

Skin contact with the liquid during production or use.●

How can 2-butanone affect my health?

The known health effects to people from exposure to 2-butanone are irritation of the nose, throat, skin,and eyes. No one has died from breathing 2-butanone alone. If 2-butanone is breathed along with otherchemicals that damage health, it can increase the amount of damage that occurs.

Serious health effects in animals have been seen only at very high levels. When breathed, these effectsincluded birth defects, loss of consciousness, and death.

When swallowed, rats had nervous system effects including drooping eyelids and uncoordinated musclemovements. There was no damage to the ability to reproduce.

Mice who breathed low levels for a short time showed temporary behavioral effects. Mild kidney damagewas seen in animals that drank water with lower levels of 2-butanone for a short time.

There are no long-term studies with animals either breathing or drinking 2-butanone.

How likely is 2-butanone to cause cancer?

The Department of Health and Human Services has not classified 2-butanone as to its human



carcinogenicity.

The International Agency for Research on Cancer and the Environmental Protection Agency (EPA) havealso not classified 2-butanone as to its human carcinogenicity.

Two studies of workers exposed to 2-butanone and other chemicals did not find an increase in cancer. Noanimal studies are available that examine the potential for 2-butanone to cause cancer.

Is there a medical test to show whether I've been exposed to 2-butanone?

Tests are available to measure 2-butanone or its breakdown products in blood, breath, and urine. Thesetests are useful only to measure recent exposures because 2-butanone and its breakdown products leavethe body rapidly. These tests are not usually performed at your doctor's office, but your doctor can takeblood or urine samples and send them to a testing laboratory.

Has the federal government made recommendations to protect human health?

The EPA requires that discharges or spills into the environment of 5,000 pounds of more of 2-butanonebe reported.

The Occupational Safety and Health Administration (OSHA) set an occupational exposure limit of 200parts of 2-butanone per million parts of workplace air (200 ppm) for an 8-hour workday, 40-hourworkweek.

The American Conference of Governmental Industrial Hygienists (ACGIH) and the National Institute forOccupational Safety and Health (NIOSH) have established the same guidelines as OSHA for theworkplace.

GlossaryCarcinogenicity:

Ability to cause cancer.

Evaporate:

To change into a vapor or a gas.

PPM:

Parts per million.

Long-term:

Lasting one year or longer.

Short time:

Lasting 14 days or less.

References

Agency for Toxic Substances and Disease Registry (ATSDR). 1992. Toxicological profile for2-butanone. Atlanta, GA: U.S. Department of Health and Human Services, Public Health Service.

Where can I get more information?

ATSDR can tell you where to find occupational and environmental health clinics. Their specialists can



recognize, evaluate, and treat illnesses resulting from exposure to hazardous substances. You can alsocontact your community or state health or environmental quality department if you have any morequestions or concerns.

For more information, contact:Agency for Toxic Substances and Disease Registry

Division of Toxicology

1600 Clifton Road NE, Mailstop E-29

Atlanta, GA 30333

Phone: 1-800-447-1544

FAX: 404-639-6315

U.S. Department of Health and Human ServicesPublic Health ServiceAgency for Toxic Substances and Disease Registry

Link to ToxFAQs Home Page

Link to ATSDR Science Corner

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METHYL ETHYL KETONEMethyl ethyl ketone is a federal hazardous air pollutant and was identified as a toxic air contaminant inApril 1993 under AB 2728.

CAS Registry Number: 78-93-3

Structure: C2H5COCH3

Molecular Formula: C4H8O

DescriptionMethyl ethyl ketone is a flammable, colorless liquid with an acetone-like, sweet, pungent odor. It issoluble in four parts water and miscible with alcohol, ether, acetone, and benzene. It is lighter than waterand may be expected to float while rapidly dissolving (HSDB, 1991).

Physical Properties of Methyl Ethyl Ketone

Molecular Weight 72.10Boiling Point 79.6 oCMelting Point -86.35 oCFlash Point: -6 oC (21 oF) (closed cup)Vapor Pressure 90.6 mm Hg at 25 oCVapor Density 2.41 (air = 1)Density/Specific Gravity 0.805 at -20/4 oC (water = 1)Log/Octanol Partition Coefficient 0.29Henry's Law Constant 1.05 x 10-5 atm-m3/moleConversion Factor 1 ppm = 2.95 mg/m3

(HSDB, 1991; Merck, 1989; Sax, 1989; U.S. EPA, 1994a)

SOURCES AND EMISSIONS

A. Sources

Methyl ethyl ketone is used as a solvent for lacquers, adhesives, rubber cement, printing inks, and paintremovers, in cleaning solutions, as a catalyst, and as a carrier. Cigarette smoke and gasoline exhaust arealso sources of methyl ethyl ketone. Methyl ethyl ketone has been detected or quantified in motor vehicleexhaust by the Air Resources Board (ARB) (ARB, 1995e).

The primary stationary sources that have reported emissions of methyl ethyl ketone in California are

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millwork, veneer, and plywood manufacturers, manufacturers of wood furniture, and manufacturers ofrubber and plastic footwear (ARB, 1997b).

B. Emissions

The total emissions of methyl ethyl ketone from stationary sources in California are estimated to be atleast 290,000 pounds per year, based on data reported under the Air Toxics "Hot Spots" Program (AB2588) (ARB, 1997b).

C. Natural Occurrence

Methyl ethyl ketone occurs naturally in volcanos, forest fires, products of biological degradation, and is anatural component of food (Howard, 1990).

AMBIENT CONCENTRATIONSMethyl ethyl ketone is routinely monitored by the Air Resources Board statewide air toxics network. Thenetwork's mean concentration of methyl ethyl ketone from January 1996 to December 1996 is estimatedto be 0.32 micrograms per cubic meter (µg/m3) or 0.11 parts per billion (ppb) (ARB, 1997c).

The United States Environmental Protection Agency (U.S. EPA) has also compiled ambientconcentration data for methyl ethyl ketone from several locations throughout the United States from1972-87. A mean ambient concentration of 1.4 µg/m3 (0.47 ppb) was derived from these data (U.S. EPA,1993a).

INDOOR SOURCES AND CONCENTRATIONSNo information about the indoor sources and concentrations of methyl ethyl ketone was found in thereadily-available literature.

ATMOSPHERIC PERSISTENCEIf released to the atmosphere, methyl ethyl ketone will exist primarily in the gas phase. The dominanttropospheric loss process of methyl ethyl ketone appears to be reaction with the hydroxyl (OH) radical,with photolysis being unimportant. The calculated half-life and lifetime of methyl ethyl ketone due toreaction with the OH radical are 9 days and 13 days, respectively. The products of the OH radicalreaction are acetaldehyde, formaldehyde and, in the presence of nitrogen dioxide (NO2), peroxyacetylnitrate (PAN) (Atkinson, 1994).

AB 2588 RISK ASSESSMENT INFORMATIONAlthough methyl ethyl ketone is reported as being emitted in California from stationary sources no healthvalues (cancer or non-cancer) are listed in the California Air Pollution Control Officers Association Air


Toxics "Hot Spots" Program Revised 1992 Risk Assessment Guidelines for use in risk assessments(CAPCOA, 1993).

HEALTH EFFECTSProbable routes of human exposure to methyl ethyl ketone are inhalation, ingestion, and dermal contact(Sittig, 1991).

Non-Cancer: Exposure to methyl ethyl ketone vapors can cause eyes, nose, throat, and respiratory tractirritation. Methyl ethyl ketone is a central nervous system depressant. Methyl ethyl ketone enhances theneurotoxicity of n-hexane (U.S. EPA, 1994a).

The U.S. EPA has established a Reference Concentration (RfC) of 1.0 milligram per cubic meter formethyl ethyl ketone, based on decreased fetal birth weight in mice. The U.S. EPA estimates thatinhalation of this concentration or less, over a lifetime, would not likely result in the occurrence ofchronic, non-cancer effects. The U.S. EPA has established an oral Reference Dose (RfD) for methylethyl ketone of 0.6 milligrams per kilogram per day, based on decreased fetal birth weights in rats. TheU.S. EPA estimates that consumption of this dose or less, over a lifetime, would not likely result in theoccurrence of chronic, non-cancer effects (U.S. EPA, 1994a).

No information was located on adverse reproductive effects of methyl ethyl ketone in humans.Retardation of fetal development and fetal malformations were reported in mice exposed to methyl ethylketone by inhalation (U.S. EPA, 1994a).

Cancer: No information is available regarding carcinogenic effects in humans from exposure to methylethyl ketone. The U.S. EPA has placed methyl ethyl ketone in Group D: Not classifiable as a carcinogen,based on lack of data in humans and animals (U.S. EPA, 1994a). The International Agency for Researchon Cancer has not classified methyl ethyl ketone for carcinogenicity (IARC, 1987a).


METHYL ETHYL KETONE

Hazard Summary

CAUTION: Unless otherwise noted, the quantitative information on these fact sheets are from "EPAHealth Effects Notebook for Hazardous Air Pollutants-Draft", EPA-452/D-95-00, PB95-503579,December 1994." Please conduct a current literature search and check the appropriate current onlinedatabase for the most recent quantitative information.

Acute (short-term) exposure to methyl ethyl ketone in humans, via inhalation, results in irritationto the eyes, nose, and throat, and central nervous system depression.

●

Limited information is available on the chronic (long-term) effects of methyl ethyl ketone inhumans. Chronic inhalation studies in animals have reported effects on the central nervous system,liver, and respiratory system.

●

The Reference Concentration (RfC) for methyl ethyl ketone is 1.0 mg/m3.a The U.S. EnvironmentalProtection Agency (EPA) estimates that inhalation of this concentration or less, over a lifetime,would not likely result in the occurrence of chronic, noncancer effects.b

●

The Reference Dose (RfD) for methyl ethyl ketone is 0.6 mg/kg/d.c EPA estimates thatconsumption of this level or less, over a lifetime, would not likely result in the occurrence ofchronic, noncancer effects.

●

No information is available on the developmental or reproductive effects of methyl ethyl ketone inhumans. Reduction of fetal development and fetal malformations has been reported in miceexposed to methyl ethyl ketone in the air.

●

Limited data are available on the carcinogenic effects of methyl ethyl ketone. No human data areavailable and the only available animal study did not report skin tumors from dermal exposure tomethyl ethyl ketone. EPA has classified methyl ethyl ketone as a Group D, not classifiable as tohuman carcinogenicity.

●

a Milligrams per cubic meter is the unit of measurement for chemicals in air.b The RfC is not a direct estimator of risk, but rather a reference point to gauge the potential effects.Exceedance of the RfC does not imply that an adverse health effect would necessarily occur. As theamount and frequency of exposures exceeding the RfC increase, the probability that adverse health effectsmay be seen also increases.

METHYL ETHYL KETONE

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c Milligrams per kilogram per day is one way to measure the amount of the contaminant that is consumedin food.

Please Note: The main sources of information for this fact sheet are EPA's Health Effects Assessment forMethyl Ethyl Ketone and EPA's Integrated Risk Information System (IRIS), which contains information oninhalation chronic toxicity of methyl ethyl ketone and the RfC and oral chronic toxicity and the RfD.Other secondary sources include the Hazardous Substances Data Bank (HSDB), a database of summariesof peer-reviewed literature, and the Registry of Toxic Effects of Chemical Substances (RTECS), adatabase of toxic effects that are not peer reviewed.

Environmental/Occupational Exposure

Methyl ethyl ketone has been detected in both indoor and outdoor air. Methyl ethyl ketone can beproduced in outdoor air by the photooxidation of certain air pollutants, such as butane and otherhydrocarbons. (1)

●

Methyl ethyl ketone has been found in drinking water and surface water at a number of sites. (2)●

Exposure to methyl ethyl ketone could also occur at the workplace and through exposure tohousehold products containing the chemical. (1)

●

Assessing Personal Exposure

Levels of methyl ethyl ketone in the urine can be measured to determine exposure to the chemical.(1)

●

Health Hazard Information

Acute Effects:

Acute exposure to high concentrations of methyl ethyl ketone in humans produces irritation to theeyes, nose, and throat. (1,3,4)

●

Other effects reported from acute inhalation exposure in humans include central nervous systemdepression, headache, and nausea. (1,3,4)

●

Dermatitis has been reported in humans following dermal exposure to methyl ethyl ketone. (1)●

Tests involving acute exposure of animals, such as the LD50 test in rabbits, has shown methyl ethylketone to have high acute toxicity from dermal exposure, while the LD50 test in rats and mice hasshown the chemical to have moderate toxicity from ingestion. (5)

●

The LC50 test in rats has indicated low toxicity from methyl ethyl ketone exposure via inhalation.(5)

●

Chronic Effects (Noncancer):

Limited information is available on the chronic effects of methyl ethyl ketone in humans frominhalation exposure. One study reported nerve damage in individuals who sniffed a glue thinnercontaining methyl ethyl ketone and other chemicals. (1)

●

METHYL ETHYL KETONE


Slight effects on the central nervous system, liver, and respiratory system have been reported inchronic inhalation studies of methyl ethyl ketone in animals. (1)

●

The RfC for methyl ethyl ketone is 1 mg/m3 based on decreased fetal birth weight in mice. (6)●

EPA has medium confidence in the principal study on which the RfC is based because it is welldesigned and tested several exposure concentrations and several endpoints of toxicity although thereare insufficient data presented for possible respiratory effects; low confidence in the databasebecause there are no multigenerational studies and only one subchronic study and portal-of-entryeffects are not adequately address; and, consequently, confidence in the RfC is low. (6)

●

The RfD for methyl ethyl ketone is 0.6 mg/kg/d based on decreased fetal birth weight in rats. (6)●

EPA has low confidence in the study on which the RfD is based because lowering the high-dosegroup from 3.0 to 2.0% confounded determination of the critical effect; low confidence in thedatabase because of the lack of oral data for MEK itself and the absence of data in a second species;and, consequently, low confidence in the RfD. (6)

●

EPA's Office of Air Quality Planning and Standards, for a hazard ranking under Section 112(g) ofthe Clean Air Act Amendments, has evaluated methyl ethyl ketone for chronic toxicity and hasgiven it a composite score of 10 (scores range from 1 to 100, with 100 being the most toxic). Thesescores are nonlinear and are the product of two ratings: a rating based on the minimal-effect doseand a rating based on the type of effect. (9)

●

Reproductive/Developmental Effects:

No information on the reproductive or developmental effects of methyl ethyl ketone in humans waslocated.

●

An inhalation study in mice reported retardation of fetal development and fetal malformations inanimals exposed to methyl ethyl ketone. (4)

●

Cancer Risk:

No information on the carcinogenicity of methyl ethyl ketone in humans was located.●

No studies were available on the carcinogenicity of methyl ethyl ketone by the oral or inhalationroutes. In a dermal carcinogenicity study, skin tumors were not reported from methyl ethyl ketoneexposure. (1,6)

●

EPA has classified methyl ethyl ketone as a Group D, not classifiable as to human carcinogenicity,based on a lack of data concerning carcinogenicity in humans and animals. (6)

●

Physical Properties

Methyl ethyl ketone is a colorless volatile liquid that is soluble in water. (2)●

The odor threshold for methyl ethyl ketone is 5.4 ppm, with an acetone-like odor reported. (8)●

The chemical formula for methyl ethyl ketone is C4H8O and the molecular weight is 72.10 g/mol.(9)

●

The vapor pressure for methyl ethyl ketone is 95.1 mm Hg at 25 C, and it has a log octanol/waterpartition coefficient (Log Kow) of 0.261. (9)

●

METHYL ETHYL KETONE


Uses

The primary use of methyl ethyl ketone is as a solvent in processes involving gums, resins, celluloseacetate, and cellulose nitrate. (1)

●

Methyl ethyl ketone is also used in the synthetic rubber industry, in the production of paraffin wax,and in household products such as lacquer and varnishes, paint remover, and glues. (1)

●

Conversion Factors:To convert from ppm to mg/m3: mg/m3 = (ppm) × (molecular weight of the compound)/(24.45). For methyethyl ketone: 1 ppm = 2.95 mg/m3.

Health Data from Inhalation Exposure

Concentration (mg/m3) Health numbersa Regulatory, advisory numbersb Reference

100,000.0

--------10,000.0

LC50 (rat)

(23,500 mg/m3)

● 5

--------1,000.0

LOAEL (mice)(8,906 mg/m3)c

●

NOAEL (mice)(2,978 mg/m3)c

●

66

--------100.0

OSHA PEL and ACGIH TLV(STEL) (885 mg/m3)

●

OSHA PEL, ACGIH TLV, andNIOSH REL (590 mg/m3)

●

33

--------10.0

--------1.0

RfC (1 mg/m3)● 6

ACGIH STEL--American Conference of Governmental and Industrial Hygienists' short-term exposure

METHYL ETHYL KETONE


limit: 15-min time-weighted-average exposure that should not be exceeded at any time during a workdayeven if the 8-h time-weighted-average is within the threshold limit value.ACGIH TLV--American Conference of Governmental and Industrial Hygienists' threshold limit valueexpressed as a time-weighted average; the concentration of a substance to which most workers can beexposed without adverse effects.LC50 (Lethal Concentration50)--A calculated concentration of a chemical in air to which exposure for aspecific length of time is expected to cause death in 50% of a defined experimental animal population.LOAEL--Lowest-observed-adverse-effect level.NIOSH REL--National Institute of Occupational Safety and Health's recommended exposure limit;NIOSH-recommended exposure limit for an 8- or 10-h time-weighted-average exposure and/or ceiling.NOAEL--No-observed-adverse-effect level.OSHA PEL--Occupational Safety and Health Administration's permissible exposure limit expressed as atime-weighted average; the concentration of a substance to which most workers can be exposed withoutadverse effect averaged over a normal 8-h workday or a 40-h workweek.RfC--Reference concentration.

a Health numbers are toxicological numbers from animal testing or risk assessment values developed byEPA.b Regulatory numbers are values that have been incorporated in Government regulations, while advisorynumbers are nonregulatory values provided by the Government or other groups as advice.c The LOAEL and NOAEL are from the critical study used as the basis for the EPA RfC.

References

U.S. Environmental Protection Agency. Updated Health Effects Assessment for Methyl EthylKetone. EPA/600/8-89/093. Environmental Criteria and Assessment Office, Office of Health andEnvironmental Assessment, Office of Research and Development, Cincinnati, OH. 1990.

1.

U.S. Environmental Protection Agency. Health Advisory for Methyl Ethyl Ketone. Office ofDrinking Water, Washington, DC. 1987.

2.

E.J. Calabrese and E.M. Kenyon. Air Toxics and Risk Assessment. Lewis Publishers, Chelsea, MI.1991.

3.

U.S. Department of Health and Human Services. Hazardous Substances Data Bank (HSDB, onlinedatabase). National Toxicology Information Program, National Library of Medicine, Bethesda, MD.1993.

4.

U.S. Department of Health and Human Services. Registry of Toxic Effects of Chemical Substances(RTECS, online database). National Toxicology Information Program, National Library ofMedicine, Bethesda, MD. 1993.

5.

U.S. Environmental Protection Agency. Integrated Risk Information System (IRIS) on Methyl EthylKetone. Environmental Criteria and Assessment Office, Office of Health and EnvironmentalAssessment, Office of Research and Development, Cincinnati, OH. 1993.

6.

U.S. Environmental Protection Agency. Technical Background Document to Support RulemakingPursuant to the Clean Air Act--Section 112(g). Ranking of Pollutants with Respect to Hazard toHuman Health. EPA450/3-92-010. Emissions Standards Division, Office of Air Quality Planningand Standards, Research Triangle Park, NC. 1994.

7.

METHYL ETHYL KETONE


J.E. Amoore and E. Hautala. Odor as an aid to chemical safety: Odor thresholds compared withthreshold limit values and volatilities for 214 industrial chemicals in air and water dilution. Journalof Applied Toxicology, 3(6):272-290. 1983.

8.

U.S. Environmental Protection Agency. Assessment Tools for the Evaluation of Risk (ASTER,online database). Environmental Research Laboratory, Duluth, MN. 1993.

9.

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METHYL ETHYL KETONE


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Methyl ethyl ketone (MEK)CASRN 78-93-3

Contents

I.A. REFERENCE DOSE FOR CHRONIC ORAL EXPOSURE (RfD)

I.B. REFERENCE CONCENTRATION FOR CHRONIC

INHALATION EXPOSURE (RfC)

II. CARCINOGENICITY ASSESSMENT FOR LIFETIME EXPOSURE

VI. BIBLIOGRAPHY

VII. REVISION HISTORY

VIII. SYNONYMS

0071Methyl ethyl ketone (MEK); CASRN 78-93-3

Health assessment information on a chemical substance is included in IRIS only after a comprehensive review of chronic toxicity data by U.S. EPA health scientists from several Program Offices and the Office of Research and Development. The summaries presented in Sections I and II represent a consensus reached in the review process. Background information and explanations of the methods used to derive the values given in IRIS are provided in the Background Documents.

STATUS OF DATA FOR MEK

File On-Line 01/31/1987

Category (section) Status Last Revised----------------------------------------- -------- ------------

Oral RfD Assessment (I.A.) on-line 05/01/1993

Inhalation RfC Assessment (I.B.) on-line 07/01/1992

U.S. EPA IRIS Substance file - Methyl ethyl ketone (MEK); CASRN 78-93-3

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Carcinogenicity Assessment (II.) on-line 12/01/1989

_I. CHRONIC HEALTH HAZARD ASSESSMENTS FOR NONCARCINOGENICEFFECTS

__I.A. REFERENCE DOSE FOR CHRONIC ORAL EXPOSURE (RfD)

Substance Name -- Methyl ethyl ketone (MEK)CASRN -- 78-93-3Last Revised -- 05/01/1993

The oral Reference Dose (RfD) is based on the assumption that thresholds exist for certain toxic effects such as cellular necrosis. It is expressed in units of mg/kg-day. In general, the RfD is an estimate (with uncertainty spanning perhaps an order of magnitude) of a daily exposure to the human population (including sensitive subgroups) that is likely to be without an appreciable risk of deleterious effects during a lifetime. Please refer to the Background Document for an elaboration of these concepts. RfDs can also be derived for the noncarcinogenic health effects of substances that are also carcinogens. Therefore, it is essential to refer to other sources of information concerning the carcinogenicity of this substance. If the U.S. EPA has evaluated this substance for potential human carcinogenicity, a summary of that evaluation will be contained in Section II of this file.

___I.A.1. ORAL RfD SUMMARY

Critical Effect Experimental Doses* UF MF RfD-------------------- ----------------------- ----- --- ---------Decreased fetal NOAEL: 1771 mg/kg-day 3000 1 6E-1birth weight (1% 2-butanol solution) mg/kg-day

Multigeneration/ LOAEL: 3122 mg/kg-dayDevelopmental Rat (2% 2-butanol solution)Feeding Study

Cox et al., 1975

*Conversion Factors and Assumptions: Based on actual consumption data for the



NOAEL and regression analysis for the LOAEL of exposure to 2-butanol, a metabolic intermediate of methyl ethyl ketone.

___I.A.2. PRINCIPAL AND SUPPORTING STUDIES (ORAL RfD)

Cox, G.E., D.E. Bailey and K. Morgareidge. 1975. Toxicity studies in rats with 2-butanol including growth, reproduction and teratologic observations. Food and Drug Research Laboratories, Inc., Waverly, NY, Report No. 91MR R 1673.

The identification of the critical effect for methyl ethyl ketone (MEK), also referred to as 2-butanone, is based on its metabolic intermediate, 2-butanol. A detailed rationale for use of this intermediate of MEK can be found in Additional Comments/Studies.

Weanling FDRL-Wistar stock rats (30/sex/group) were given 2-butanol in drinking water at 0, 0.3, 1.0, or 3.0% solutions and a standard laboratory ration ad libitum. Weekly feed, fluid intakes and body weights were recorded to determine the efficiency of food utilization and to calculate the average daily intake of 2-butanol. The average daily intake of 2-butanol for males was 0, 538, 1644, and 5089 mg/kg-day and for females was 0, 594, 1771, and 4571 mg/kg-day for the 0, 0.3, 1.0, and 3.0% solutions, respectively. At the highest exposure level (3.0%), net weight gain was reduced compared with controls both in males (229 g vs. 269 g in controls) and females (130 g vs. 154 g in controls) during the 8 weeks of initial monitoring. However, no differences were found in the efficiency of food utilization.

After 9 weeks of exposure, parental matings were made with one male and one female from each of the respective treatment groups (P generation). Following birth of the first litter (F1A) of the parental generation, various reproduction and lactation responses were measured. This study design incorporated a multigeneration protocol with measurement of developmental toxicity endpoints. Significant effects were noted in the litters from the 3.0% 2-butanol dose group vs. the control group, including the number of pups/litter cast alive (8.46 vs. 10.3), the number of pups/litter alive at 4 days before culling (8.12 vs. 10.3), the number of pups/litter alive at 21 days (6.85 vs. 7.68), the mean body weight/pup after culling at 4 days (8.2 g vs. 10.3 g) and the mean body weight/pup at 21 days (28.4 g vs. 49.5 g).

Based on results found in the 3.0% (high-dose) 2-butanol F1A generation, the treatment of all high-dose parents and offspring was reduced to 2.0% 2-butanol for the remainder of the experimental protocol. Following a 2-week interim adaptation period to allow the F1A generation animals to attain a more normal weight, the P generation was subsequently remated to produce a second litter (F1B), and the F1A generation selected for an F2 mating. Therefore, a new high dose of 2.0% 2-butanol was calculated to be equivalent to 3384 mg/kg-day in males and 3122 mg/kg-day in females based on regression analysis of the 8 week water intake data. The F1B litters receiving 2.0% 2-butanol showed a slight reduction in average fetal weight compared with controls (3.74 g vs. 4.14 g in controls). Nidation, early fetal deaths, and late fetal deaths were not detectably affected. Skeletal findings also were reported for the F1B



generation. The 2.0% group showed apparent increases in missing sternebrae, wavy ribs, and incomplete vertebrae ossification when compared with both the 0.3 and 1.0% groups. However, because of the rather high incidence in the control group for these findings, these effects could not be determined to be compound-related. The 2.0% group also showed a reduction in the mean body weight per pup at day 4 following culling (9.48 g vs. 10.0 g in the control) and in the mean body weight at 21 days (34.9 vs. 41.1 g in the control). Although these reductions were not as great in the high dose (3.0%) F1A generation, the percent body weight reduction in the F1B high dose (2.0%) was doubled at 21 days (reductions of 5% at 4 days and 11% at 21 days). This generation showed the same doubling trend in fetal weight reduction as was reported in the F1A group exposed to 3.0% 2-butanol throughout (reductions of 21% at 4 days and 43% at 21 days). These results are also presented in abstract form by Gallo et al. (1977).

At the 2.0% level of the F2 generation, there were a number of histopathologic changes noted in the kidney of the male rats only. These changes were characterized by nonreactive tubular degeneration in the outer medullary zone, tubular cast formation, foci of tubular degeneration and regeneration, microcysts in the renal papilla, glomerular fibrosis, and focal epithelial calcification. These findings are consistent with the pattern of early stages of alpha 2u-globulin-associated rat nephrotoxicity as set forth by the Risk Assessment Forum (U.S. EPA, 1991). As per the Agency's guidance, it is not appropriate to use these specie-and sex-specific renal effects to establish a critical effect.

Administration of 2-butanol resulted in the occurrence of developmental effects. Decreased pup survivability and fetal weight were seen in the 3.0% group, and in the F1 offspring (F1A and F1B, whose parents received 3.05 and 2.0% 2-butanol, respectively). The decrease in fetal weight continued to be demonstrated in the F2 generation at the 2.0% level. Therefore, based on these developmental toxicologic endpoints, a LOAEL of 3122 mg/kg-day (2.0% solution) and a NOAEL of 1771 mg/kg-day (1.0% solution) are identified.

___I.A.3. UNCERTAINTY AND MODIFYING FACTORS (ORAL RfD)

UF -- Four uncertainty factors of 10 each were applied, one to account for interspecies extrapolation and intraspecies variability (extrapolation to sensitive human populations); one to adjust for subchronic to chronic extrapolation since long-term effects in the dams during the exposure period were not reported in the principal study; one for incompleteness of the data base, including a lack of both subchronic and chronic oral exposure studies for MEK; and one to account for the absence of data for a second rodent specie for either MEK or 2-butanol. As is usual practice, the application of four full areas of uncertainty generally results in a total uncertainty factor of 3000, given the interrelationship among and overlap between the various areas of uncertainty described above.

MF -- None



___I.A.4. ADDITIONAL STUDIES / COMMENTS (ORAL RfD)

Data on toxic effects in humans or laboratory animals following oral exposure to MEK are restricted to a limited number of acute studies. Oral LD50 values for MEK include 5522 and 2737 mg/kg in rats (Smyth et al., 1962 and Kimura et al., 1971, respectively) and 4,044 mg/kg in mice (Tanii et al., 1986). Single gavage doses of 15 mmol/kg MEK in corn oil (1082 mg/kg) produced no deaths or histological alterations in the livers of male Fischer 344 rats, but produced tubular necrosis in kidneys (Brown and Hewitt, 1984). Pre-administration of single gavage doses of MEK (or other ketonic solvents) enhanced the liver and kidney damage produced by a 0.5 mL/kg intraperitoneal dose of carbon tetrachloride (Brown and Hewitt, 1984). This MEK potentiation of carbon tetrachloride hepatotoxicity was also observed in similar experiments with male Sprague-Dawley rats (Dietz and Traiger, 1979).

At present there are insufficient oral exposure data of MEK from which to derive an oral RfD. Availability of oral exposure data of a metabolic intermediate of MEK, i.e., 2-butanol, was used to derive the RfD of MEK. The following is an explanation of the rationale for using the oral data of 2-butanol rather than attempting a route-to-route extrapolation of the available inhalation data for MEK.

Traiger and Bruckner (1976) have estimated that approximately 96% of an administered dose of 2-butanol is oxidized in vivo to MEK. The data from the Dietz et al. (1981) study support this estimation. Administration of 1776 mg/kg 2-butanol by gavage shows peak blood 2-butanol concentrations (0.59 mg/mL) within 2 hours; the compound is barely detectable after 16 hours. As the blood concentrations of 2-butanol fall, the peak concentrations of MEK (0.78 mg/mL) and 2,3-butanediol (0.21 mg/mL) occurred at 8 and 18 hours respectively. Ultimately, 2-butanol and MEK are metabolized through the same intermediates.

Additional metabolism of the ketone occurs by oxidation to hydroxylated intermediates such as 2,3-butanediol, all of which can be eliminated in the urine (DiVincenzo et al., 1977). DiVincenzo et al. (1976) have previously identified MEK, 2-butanol, and other oxidative metabolites of MEK in the serum of guinea pigs following administration of MEK.

A pharmacokinetic model was presented by Dietz et al. (1981) to describe the biotransformation of 2-butanol and MEK in rats when given a dose calculated to produce an equivalent calculated adjusted urinary concentration. When MEK is administered by gavage at a dose of 1690 mg/kg, the detection of the formation of 2-butanol and the oxidative metabolites corresponds to that previously reported in the guinea pig. By 18 hours post administration, MEK is barely detectable in the blood (peak concentration of 0.95 mg/mL at 4 hours), but a peak blood concentration (0.26 mg/mL) of the oxidative metabolite 2,3-butanediol can be detected. Peak blood concentrations of 2-butanol (0.033 mg/mL) occurred after 6 hours.

Although it is not known if the effects reported by Cox et al. (1975) are due to either 2-butanol directly or indirectly through another common metabolite, the weight of evidence of the available data argues for using the



butanol data as a surrogate approach to the development of the RfD for MEK. It is assumed in this surrogate approach that 2-butanol is not the active metabolite causing the effects reported by Cox, given the profile of metabolism for both 2-butanol and MEK. Therefore, it is appropriate to utilize data from the oral administration of 2-butanol in order to derive an RfD for MEK in lieu of appropriate oral data for MEK.

Decreased fetal body weight was also reported in pregnant mice exposed by inhalation to 0, 398, 1010, or 3020 ppm MEK (0, 1174, 2978, or 8906 mg/cu.m, respectively, assuming 25 C and 760 mm Hg) 7 hours/day during gestational days 6-15 (Schwetz et al., 1991; Mast et al., 1989). The only maternal effect observed was a concentration-related increase in relative liver and kidney weight. The difference was statistically significant in the dams exposed to 3020 ppm MEK. The biologic significance of this increase has not been ascertained. The decrease in fetal body weight was observed in the 3020-ppm group, however the difference was statistically significant only in the males. There was a statistically significant (p<0.05) trend with increasing concentration in the incidence of fetuses with misaligned sternebrae, but this trend was not apparent in the incidence of litters with misaligned sternebrae. Although increased incidence of fetuses and litters with malformations were observed in exposed groups compared with controls, the increases were not statistically significant. The observed fetal malformations (cleft palate, fused ribs, missing vertebrae and syndactyly) present in the exposed groups were not observed in concurrent or contemporary control groups of the same strain of mice. The Schwetz et al. (1991) study identified a NOAEL of 1126 ppm and a LOAEL of 3020 ppm for the occurrence of significant, developmental effects in mice including a decrease in fetal body weight, thereby corroborating the effects observed by Cox et al. (1975).

Sprague-Dawley rats were exposed to 0, 1126, or 2618 ppm MEK (0, 3320, or 7720 mg/cu.m, respectively, assuming 25 C and 760 mm Hg) 7 hours/day during gestational days 6-15 (Schwetz et al., 1974). The following endpoints were used to assess exposure-related effects: maternal (body weight, food intake, liver weight, SGOT levels, number of implantations/litter size) and fetal (examination for anomalies, incidence of fetal resorptions, fetal body measurements). No maternal effects or effect on the incidence of fetal resorptions were observed. A decrease in fetal body weight and crown-rump length were observed in the 1126 ppm offspring, however, these effects were not observed in the offspring of the rats exposed to 2618 ppm. There were no gross, soft tissue, or specific skeletal anomalies that occurred at a significantly increased incidence among litters of dams exposed to 1126 ppm MEK. However, the total number of litters containing fetuses with anomalous skeletons was significantly increased compared with controls. In the fetuses of the 2618-ppm group, there was a significantly increased number of fetuses and litters having gross anomalies (two acaudate fetuses with an imperforate anus and 2 brachygnathous fetuses). No single soft tissue anomaly occurred at a statistically significant increased incidence, but the total number of litters containing fetuses with soft tissue anomalies was significantly greater than in controls.

Groups of 25 pregnant Sprague-Dawley rats were exposed to 0, 412, 1002, or 3005 ppm MEK (0, 1215, 2956, or 8861 mg/cu.m, respectively, assuming 25 C and 760 mm Hg) 7 hours/day during gestational days 6-15 (Deacon et al., 1981). Decreased maternal body weight gain and increased water consumption were observed in the 3005 ppm group. No other maternal effects were noted. No



statistically significant differences in the incidence of external or soft-tissue alterations were observed among exposed fetuses. A significant decrease in the incidence of delayed ossification of interparietal bones of the skull and an increase in the incidence of extra lumbar ribs and in the occurrence of delayed ossification of cervical centra were noted at the 3005-ppm exposure level.

Data for humans and rats support the assumption that approximately 50% of inhaled MEK is absorbed. From measurements of environmental and exhaled air concentrations, Perbellini et al. (1984) calculated pulmonary retentions of about 70% in workers exposed to concentrations less than 300 ppm for 4 hours (most of the measurements were made at environmental concentrations at or below 100 ppm). From similar measurements, Liira et al. (1988) calculated a pulmonary retention of about 53% for male human volunteers exposed to 200 ppm for 4 hours. Kessler et al. (1988) reported a pulmonary retention of 40% for rats exposed to concentrations less than or equal to 180 ppm for up to about 14 hours.

Although a route-to-route extrapolation could be attempted from the inhalation data, a number of assumptions would need to be made with regard to the inhalation and oral absorption efficiencies making a route-to-route extrapolation limited at best. The developmental effects of MEK inhalation exposure are consistent with the developmental effects seen following oral exposure to 2-butanol and therefore make such an exercise plausible. However, the calculation of an inhalation absorption efficiency for MEK is problematic. The pulmonary retention values discussed above are calculated for exposures of 200 ppm (Liira et al., 1988) and 300 ppm (Perbellini et al., 1984) for a limited 4-hour exposure in humans. The pulmonary retention data of Kessler et al. (1988) using rats, although for a longer period of time (14 hours), was at a maximum concentration of 180 ppm. The calculation of the 40% pulmonary retention value is dependent upon a low concentration that is not limited by metabolic capacity but by transport to the metabolizing enzymes. This retention value, therefore, is valid only if related to normal physiologic processes. Inhalation effects of MEK are seen at concentrations an order of magnitude greater than was used to calculate the rat pulmonary retention value. The toxicity of MEK may be a result of challenges made to a saturable enzymatic detoxification mechanism. Therefore, it cannot be assumed that the pulmonary retention value will be the same at exposures of less than 180 ppm or at greater than 1800 ppm. For this reason, it is inappropriate to estimate the pulmonary retention value at these effect levels, thereby precluding derivation of an oral RfD based upon extrapolation from inhalation effects.

___I.A.5. CONFIDENCE IN THE ORAL RfD

Study -- LowData Base -- LowRfD -- Low

Confidence in the principal study is low. The multigeneration/ developmental study for 2-butanol defined a critical effect that is corroborated by inhalation exposure data. Although the study employed an



adequate number of animals and examined appropriate endpoints, lowering the high-dose group from 3.0 to 2.0% confounded determination of the critical effect. Confidence in the data base is low. This RfD is based on a multigeneration developmental study for a compound that is nearly completely converted to MEK in a short period of time. This compound exhibits similar developmental effects as seen by inhalation exposure to MEK. However, the lack of oral data for MEK itself and the absence of data in a second specie precludes any higher level for data base confidence. This assessment for MEK is based upon the strength of data supporting the use of the 2-butanol multigeneration study and the concurrence of developmental effects for inhalation exposure to MEK and assumes that 2-butanol was not responsible for the fetal toxicity. There is a lack of data on the metabolism of 2-butanol and MEK over time thereby decreasing the confidence in the use of this surrogate approach. Therefore, confidence in the RfD is low.

___I.A.6. EPA DOCUMENTATION AND REVIEW OF THE ORAL RfD

Source Document -- This risk assessment is not presented in any existing U.S. EPA document.

Other EPA Documentation -- U.S. EPA, 1984, 1985

Agency Work Group Review -- 06/24/1985, 07/08/1985, 05/16/1990, 07/17/1991,09/23/1992, 11/05/1992

Verification Date -- 11/05/1992

___I.A.7. EPA CONTACTS (ORAL RfD)

Please contact the Risk Information Hotline for all questions concerning this assessment or IRIS, in general, at (513)569-7254 (phone), (513)569-7159 (FAX) or [email protected] (internet address).

__I.B. REFERENCE CONCENTRATION FOR CHRONIC INHALATION EXPOSURE(RfC)

Substance Name -- Methyl ethyl ketone (MEK)



CASRN -- 78-93-3Last Revised -- 07/01/1992

The inhalation Reference Concentration (RfC) is analogous to the oral RfD and is likewise based on the assumption that thresholds exist for certain toxic effects such as cellular necrosis. The inhalation RfC considers toxic effects for both the respiratory system (portal-of-entry) and for effects peripheral to the respiratory system (extrarespiratory effects). It is expressed in units of mg/cu.m. In general, the RfC is an estimate (with uncertainty spanning perhaps an order of magnitude) of a daily inhalation exposure of the human population (including sensitive subgroups) that is likely to be without an appreciable risk of deleterious effects during a lifetime. Inhalation RfCs were derived according to the Interim Methods for Development of Inhalation Reference Doses (EPA/600/8-88/066F August 1989) and subsequently, according to Methods for Derivation of Inhalation Reference Concentrations and Application of Inhalation Dosimetry (EPA/600/8-90/066F October 1994). RfCs can also be derived for the noncarcinogenic health effects of substances that are carcinogens. Therefore, it is essential to refer to other sources of information concerning the carcinogenicity of this substance. If the U.S. EPA has evaluated this substance for potential human carcinogenicity, a summary of that evaluation will be contained in Section II of this file.

___I.B.1. INHALATION RfC SUMMARY

Critical Effect Exposures* UF MF RfC-------------------- ----------------------- ----- --- ----------Decreased fetal birth NOAEL: 2978 mg/cu.m 1000 3 1E+0weight (1010 ppm, nominal) mg/cu.m NOAEL(ADJ): 2978 mg/cu.mMouse Developmental NOAEL(HEC): 2978 mg/cu.mStudy LOAEL: 8906 mg/cu.m Schwetz et al., 1991; (3020 ppm, nominal) Mast et al., 1989 LOAEL(ADJ): 8906 mg/cu.m LOAEL(HEC): 8906 mg/cu.m

*Conversion Factors: MW = 72.1 Assuming 25 C and 760 mm Hg. NOAEL (mg/cu.m) = 1010 ppm x 72.1/24.45 = 2978 mg/cu.m. Currently, the approach for dose-response analysis of developmental endpoints does not duration-adjust exposure concentrations. NOAEL(ADJ) = NOAEL = 2978 mg/cu.m. The NOAEL(HEC) was calculated for a gas:extrarespiratory effect assuming periodicity was attained. Since the b:a lambda values are unknown for the experimental animal species (a) and human (h), a default value of 1.0 is used for this ratio. NOAEL(HEC) = NOAEL(ADJ) x (b:a lambda(a)/b:a lambda(h)) = 2978 mg/cu.m.

___I.B.2. PRINCIPAL AND SUPPORTING STUDIES (INHALATION RfC)



Schwetz, B.A., T.J. Mast, R.J. Weigel, J.A. Dill and R.E. Morrissey. 1991. Developmental toxicity of inhaled methyl ethyl ketone in mice. Fund. Appl. Toxicol. 16: 742-748.

Mast, T.J., J.A. Dill, J.J. Evanoff, R.L. Rommereim, R.J. Weigel and R.B. Westerberg. 1989. Inhalation developmental toxicology studies: Teratology study of methyl ethyl ketone in mice. Final Report. Prepared by Pacific Northwest Laboratory, Battelle Memorial Institute, for the National Toxicology Program, Washington, DC. PNL-6833 UC-408.

Pregnant Swiss mice were exposed to 0, 398, 1010 or 3020 ppm methyl ethyl ketone (0, 1174, 2978 or 8906 mg/cu.m, respectively, assuming 25 C and 760 mm Hg) 7 hours/day during gestational days 6-15. The Schwetz et al. (1991) and the Mast et al. (1989) reports are the same developmental mouse study presented in different formats and are hence considered as one single study. The number of dams exposed to methyl ethyl ketone ranged from 23-28 mice depending upon exposure group. The dams were killed on gestational day 18. The only maternal effect observed was a concentration-related increase in relative liver and kidney weight. The difference was statistically significant only in the dams exposed to 3020 ppm methyl ethyl ketone. The biological significance of this increase has not been ascertained. A decrease in fetal body weight was also observed in the 3020 ppm exposed group; however, the difference was significant only in the males. There was a significant (p<0.05) trend in the incidence of misaligned sternebrae present in fetuses but not reflected in a similar analysis of litters of the animals exposed to 3020 ppm. Additionally, although no significant increase of any single malformation was found, there were several malformations (cleft palate, fused ribs, missing vertebrae and syndactyly) present at low incidences in exposed groups.

Neither maternal nor developmental toxicity was observed at exposures at or less than 1010 ppm (2978 mg/cu.m). At 3020 ppm (8906 mg/cu.m), an equivocal maternal effect was reported; however, mild developmental effects (decreased fetal body weight and misaligned sternebrae) were found. Based on the absence of both maternal and developmental toxic effects, a NOAEL of 1126 ppm (HEC=2978 mg/cu.m) is established. The LOAEL is established at 3020 ppm (HEC=8906 mg/cu.m) based on the appearance of mild, but significant developmental effects.

Groups of 21-23 pregnant Sprague-Dawley rats were exposed to 0, 1126 or 2618 ppm methyl ethyl ketone (0, 3320 or 7720 mg/cu.m, respectively, assuming 25 C and 760 mm Hg) 7 hours/day during gestational days 6-15 (Schwetz et al., 1974). The following endpoints were used to assess exposure-related effects: maternal body weight, food intake, liver weight, SGOT levels, and number of implantations/litter size; and fetal anomalies, incidence of resorptions, and fetal body measurements.

No maternal effects or effects on the incidence of fetal resorptions were observed. A decrease in fetal body weight and crown-to-rump length was observed in the offspring exposed to 1126 ppm; however, these effects were not observed in the offspring of the rats exposed to 2618 ppm There were no gross, soft tissue or specific skeletal anomalies that occurred at a significantly increased incidence among litters of dams exposed to 1126 ppm methyl ethyl ketone. However, the total number of litters containing fetuses



with anomalous skeletons was increased significantly compared to controls. In the fetuses exposed to 2618 ppm methyl ethyl ketone, there was a significantly increased number of fetuses and litters having gross anomalies (two acaudate fetuses with an imperforate anus and two brachygnathous fetuses) compared to the incidence among controls. No single soft tissue anomaly occurred at a statistically significant increased incidence, but the total number of litters containing fetuses with soft tissue anomalies was significantly greater than in controls.

The study by Deacon et al. (1981) was conducted to determine the repeatability of the fetotoxic effects observed in the Schwetz et al. (1974) study. Groups of 25 pregnant Sprague-Dawley rats were exposed to 0, 412, 1002 or 3005 ppm methyl ethyl ketone (0, 1215, 2955 or 8861 mg/cu.m, respectively, assuming 25 C and 760 mm Hg) 7 hours/day during gestational days 6-15. Decreased maternal body weight gain and increased water consumption were observed in the group exposed to 3005 ppm. No other maternal effects were noted. No statistically significant differences in the incidence of external or soft-tissue alterations were observed among exposed fetuses. A significant decrease in the incidence of delayed ossification of interparietal bones of the skull and an increase in the incidence of extra lumbar ribs and in the occurrence of delayed ossification of cervical centra were noted at the 3005 ppm exposure level.

___I.B.3. UNCERTAINTY AND MODIFYING FACTORS (INHALATION RfC)

UF -- An uncertainty factor of 1000 reflects factors of 10 to account for interspecies extrapolation, sensitive individuals, and incomplete data base including a lack of chronic and reproductive toxicity studies.

MF -- A modifying factor of 3 was used to address the lack of unequivocal data for respiratory tract (portal-of-entry) effects.

___I.B.4. ADDITIONAL STUDIES/COMMENTS (INHALATION RfC)

Slight nose and throat irritation was observed in 10 human volunteers exposed to 100 ppm methyl ethyl ketone (HEC=295 mg/cu.m) for 5 minutes. Exposure to 300 ppm (HEC=885 mg/cu.m) was judged to be intolerable by the subjects (Nelson et al., 1943).

Male and female volunteers (12-13/sex) were exposed to 186 ppm (HEC=549 mg/cu.m, assuming 25 C and 760 mm Hg) for 4 hours. No statistically significant changes in neurobehavioral performance were observed (Dick et al., 1988).

Groups of male and female Fischer 344 rats (n=15) were exposed to 0, 1254, 2518 or 5041 ppm methyl ethyl ketone (0, 3698, 7425 or 14,865 mg/cu.m,



respectively, assuming 25 C and 760 mm Hg) 6 hours/day, 5 days/week for 90 days (Cavender et al., 1983; Toxigenics, 1981). For each exposure group, 10 animals were used for general histopathology and 5 animals for neuropathologic examination. Tissues examined included nasal cavity, trachea and bronchi, lung, liver and kidney. The prevalence of chronic respiratory disease in the pulmonary region was 100% across control and all exposure groups. There were also high prevalences of nasal inflammation, including submucosal lymphocytic infiltration and lumenal exudate, across control and all exposure groups. These latter lesions, however, varied slightly across the nasal cavity section examined and with exposure level tested. Although the authors suggest that the pulmonary lesions are secondary to mycoplasma infection, no infectious agent was cultured. In other investigations utilizing a model for Mycoplasma pulmonis, pulmonary lesions showed a concentration-response indicative of upper airway irritation (Broderson et al., 1976). The high prevalences of both the nasal and pulmonary lesions in this study preclude unequivocal interpretation regarding respiratory effects. No histopathologic alterations of other major tissues or of neuropathology were observed. An increase in absolute and relative liver weight and relative kidney weight was observed in the animals of both sexes exposed to 5041 ppm. An increase in serum alkaline phosphatase levels was also observed in the female rats exposed to 5041 ppm methyl ethyl ketone. At the highest concentration, females were found to have decreased absolute and increased relative brain weight, however, no pathological changes were observed in the medulla oblongata or the sciatic and tibial nerves. No functional tests (pulmonary or neurologic) were performed in these studies. Based on toxicity remote to the respiratory tract described above, this study provisionally identifies a NOAEL of 2518 ppm (HEC=1326 mg/cu.m) and a LOAEL of 5041 ppm (HEC=2654 mg/cu.m).

Groups of 5 male Wistar rats were exposed to 10,000 ppm methyl ethyl ketone (29,489 mg/cu.m, assuming 25 C and 760 mm Hg) 8 hours/day, 7 days/week for 15 weeks. Because of severe upper respiratory tract irritation, the concentration was lowered to 6000 ppm (17,693 mg/cu.m). The exposed rats died after 7 weeks of exposure; the cause of death was bronchopneumonia. Severe hindlimb weakness was observed in all animals given a methyl ethyl ketone/n-hexane mixture by the 9th week of exposure, which progressed to severe paresis. These effects were observed again when the experiment was repeated. However, these effects were not observed when methyl ethyl ketone was administered alone (Altenkirch et al., 1978).

A group of 25 adult rats (strain not given) was exposed to 235 ppm (693 mg/cu.m) 7 hours/day, 5 days/week for 12 weeks (LaBelle and Brieger, 1955). The dose duration-adjusted concentration is equivalent to 144 mg/cu.m. A control group was included, but the number of animals was not given. At the end of the study, 15 rats were examined microscopically (organs not given) and hematologically (hemoglobin, erythrocyte, leukocyte, neutrophil, lymphocyte, and monocyte counts). The remaining 10 rats were reserved for growth studies. No adverse effects were observed, but only a few critical parameters were measured for a single exposure concentration. Similarly, 15 guinea pigs were exposed to methyl ethyl ketone at the same concentration as were the rats. No adverse effects were reported for the exposed guinea pigs. However, this information is only presented qualitatively in the report. Furthermore, it was reported that the guinea pigs experienced a vitamin deficiency possibly contributing to two deaths during the exposure period.

Male Wistar rats (8/group) were exposed to 0 or 200 ppm methyl ethyl



ketone (0 or 590 mg/cu.m, assuming 25 C and 760 mm Hg) 12 hours/day, 7 days/week for 24 weeks. A slight increase in motor nerve conduction velocity and mixed nerve conduction velocity and a decrease in distal motor latency were observed at 4 weeks of exposure. However, no difference was observed after 4 weeks [NOEL(HEC)=295 mg/cu.m] (Takeuchi et al., 1983).

Groups of 12 Sprague-Dawley rats were continuously exposed to 1125 ppm methyl ethyl ketone (3318 mg/cu.m, assuming 25 C and 760 mm Hg) for 16-55 days. Pathological examination of the sciatic nerve and intrinsic foot muscles revealed no peripheral neuropathy [NOEL(HEC)=3318 mg/cu.m] (Saida et al., 1976).

Four baboons were exposed to 100 ppm methyl ethyl ketone (295 mg/cu.m, assuming 25 C and 760 mm Hg) continuously for 7 days. Operant conditioning behavior conducted during exposure was compared to pre-exposure test scores. The operant behavior selected was a match-to-sample discrimination task and the experimental protocol allowed the performance of each baboon during exposure to be compared to his performances during a clean air exposure in the same chamber immediately prior to each exposure. There was no significant effect on accuracy; however, there was a decrease in mean response time and response during delay (Geller et al., 1979). The authors (Geller et al., 1979) suggested that this could be an early manifestation of the incoordination and narcosis observed in guinea pigs after acute exposure to 10,000 ppm methyl ethyl ketone (29,489 mg/cu.m, assuming 25 C and 760 mm Hg) (Patty et al., 1935). However, it should be pointed out that each baboon in this study was exposed to four different chemicals of which methyl ethyl ketone was given second.

Swiss mice were exposed to various levels of methyl ethyl ketone. A decrease in the immobility developed in a behavioral despair swimming test was observed. A 50% decrease in immobility (ID50) was observed at 2065 ppm (6089 mg/cu.m, assuming 25 C and 760 mm Hg) (DeCeaurriz et al., 1983).

Although the role of methyl ethyl ketone in potentiating peripheral neuropathies caused by potent neurotoxins such as hexane and methyl n-butylketone is documented (Altenkirch et al., 1978; Saida et al., 1976), current experimental data indicate that, by itself, methyl ethyl ketone has little if any neurotoxic potential. Several studies examining neurotoxicity of methyl ethyl ketone have employed neurohistopathology to evaluate toxicity. No peripheral neurohistopathological changes were noted in rats exposed continuously to 1125 ppm methyl ethyl ketone for up to 5 months (Saida et al., 1976). No treatment-related central or peripheral neurohistopathology was observed in rats exposed for 90 days (6 hours/day, 5 days/week) to methyl ethyl ketone concentrations up to 5041 ppm (Toxigenics, 1981; also reported in Cavender et al., 1983). In a study combining experiments of methyl ethyl ketone and n-hexane, Altenkirch et al. (1978) reported that all 10 male rats exposed to 6000 ppm methyl ethyl ketone (8 hours/day, 7 days/week) died in the 7th week without neurological symptoms or pathology although central and extensive peripheral neurohistopathology was observed in animals concurrently exposed to n-hexane. The authors also reported that animals in all exposure groups (both methyl ethyl ketone and hexane) were somnolent during exposure. A few studies have attempted to examine neurological deficits through functional testing in addition to histopathology. Takeuchi et al. (1983) reported an alteration in nerve conduction velocities but only in the 4th week of a 24-week exposure to 200 ppm methyl ethyl ketone; the alteration was not



corroborated by histopathology and was in the opposite direction to that predicted by peripheral neurotoxins such as n-hexane. Results from other functional-deficit studies in humans (Dick et al., 1988) have been negative and in baboons (Geller et al., 1979), inconclusive, perhaps due to experimental design problems. At present, there is no convincing experimental evidence that methyl ethyl ketone, by itself, is neurotoxic to either experimental animals or humans other than possibly inducing CNS depression at high exposure levels.

___I.B.5. CONFIDENCE IN THE INHALATION RfC

Study -- MediumData Base -- LowRfC -- Low

Confidence in the principal study is medium. This and other developmental studies were well-designed and tested several exposure concentrations and several endpoints of toxicity. Although the principal and supporting studies corroborate an effect level for developmental toxicity endpoints, there are insufficient data presented for possible respiratory effects. Confidence in the data base is low. There are no multigenerational studies and only one subchronic study. Furthermore, these studies do not adequately address portal-of-entry effects given that short-term exposure to higher concentrations than that established for the LOAEL cause nasal and throat irritation in both human and experimental animal species. Reflecting medium confidence in the principal study and low confidence in the data base, confidence in the RfC is low.

___I.B.6. EPA DOCUMENTATION AND REVIEW OF THE INHALATION RfC

Source Document -- This is not presented in any existing U.S. EPA document

Other EPA Documentation -- None

Agency Work Group Review -- 04/21/1988, 05/26/1988, 03/22/1990, 05/16/1990,07/17/1991


___I.B.7. EPA CONTACTS (INHALATION RfC)

Please contact the Risk Information Hotline for all questions concerning this



assessment or IRIS, in general, at (513)569-7254 (phone), (513)569-7159 (FAX) or [email protected] (internet address).

_II. CARCINOGENICITY ASSESSMENT FOR LIFETIME EXPOSURE


Section II provides information on three aspects of the carcinogenic assessment for the substance in question; the weight-of-evidence judgment of the likelihood that the substance is a human carcinogen, and quantitative estimates of risk from oral exposure and from inhalation exposure. The quantitative risk estimates are presented in three ways. The slope factor is the result of application of a low-dose extrapolation procedure and is presented as the risk per (mg/kg)/day. The unit risk is the quantitative estimate in terms of either risk per ug/L drinking water or risk per ug/cu.m air breathed. The third form in which risk is presented is a drinking water or air concentration providing cancer risks of 1 in 10,000, 1 in 100,000 or 1 in 1,000,000. The rationale and methods used to develop the carcinogenicity information in IRIS are described in The Risk Assessment Guidelines of 1986 (EPA/600/8-87/045) and in the IRIS Background Document. IRIS summaries developed since the publication of EPA's more recent Proposed Guidelines for Carcinogen Risk Assessment also utilize those Guidelines where indicated (Federal Register 61(79):17960-18011, April 23, 1996). Users are referred to Section I of this IRIS file for information on long-term toxic effects other than carcinogenicity.

__II.A. EVIDENCE FOR CLASSIFICATION AS TO HUMAN CARCINOGENICITY

___II.A.1. WEIGHT-OF-EVIDENCE CLASSIFICATION

Classification -- D; not classifiable as to human carcinogenicity

Basis -- Based on no human carcinogenicity data and inadequate animal data.



___II.A.2. HUMAN CARCINOGENICITY DATA

None.

___II.A.3. ANIMAL CARCINOGENICITY DATA

Inadequate. No data were available to assess the carcinogenic potential of methyl ethyl ketone by the oral or inhalation routes. In a skin carcinogenesis study, two groups of 10 male C3H/He mice received dermal applications of 50 mg of a solution containing 25 or 29% methyl ethyl ketone in 70% dodecylbenzene twice a week for 1 year. No skin tumors developed in the group of mice treated with 25% methyl ethyl ketone. After 27 weeks, a single skin tumor developed in 1 of 10 mice receiving 29% methyl ethyl ketone (Horton et al., 1965).

___II.A.4. SUPPORTING DATA FOR CARCINOGENICITY

Methyl ethyl ketone was not mutagenic for Salmonella typhimurium strains TA98, TA100, TA1535, or TA1537 with or without rat hepatic homogenates (Florin et al., 1980; Douglas et al., 1980). Methyl ethyl ketone induced aneuploidy in the diploid D61, M strain of Saccharomyces cerevisiae (Zimmermann et al., 1985). Low levels of methyl ethyl ketone combined with low levels of nocodazole (another inducer of aneuploidy), also produced significantly elevated levels of aneuploidy in the system (Mayer and Goin, 1987).

__II.B. QUANTITATIVE ESTIMATE OF CARCINOGENIC RISK FROM ORALEXPOSURE

None.

__II.C. QUANTITATIVE ESTIMATE OF CARCINOGENIC RISK FROM INHALATIONEXPOSURE



None.

__II.D. EPA DOCUMENTATION, REVIEW, AND CONTACTS (CARCINOGENICITYASSESSMENT)

___II.D.1. EPA DOCUMENTATION

U.S. EPA. 1985. Health and Environmental Effects Profile for Methyl Ethyl Ketone. Prepared by the Office of Health and Environmental Assessment, Environmental Criteria and Assessment Office, Cincinnati, OH for the Office of Solid Waste and Emergency Response, Washington, DC.

U.S. EPA. 1988. Updated Health Effects Assessment for Methyl Ethyl Ketone. Prepared by the Office of Health and Environmental Assessment, Environmental Criteria and Assessment Office, Cincinnati, OH for the Office of Solid Waste and Emergency Response, Washington, DC.

The 1988 Updated Health Effects Assessment for Methyl Ethyl Ketone has received Agency review.

___II.D.2. REVIEW (CARCINOGENICITY ASSESSMENT)

Agency Work Group Review -- 05/30/1989


___II.D.3. U.S. EPA CONTACTS (CARCINOGENICITY ASSESSMENT)

Please contact the Risk Information Hotline for all questions concerning this assessment or IRIS, in general, at (513)569-7254 (phone), (513)569-7159 (FAX) or [email protected] (internet address).



_VI. BIBLIOGRAPHY


__VI.A. ORAL RfD REFERENCES

Brown, E.M. and W.R. Hewitt. 1984. Dose-response relationships in ketone-induced potentiation of chloroform hepato- and nephrotoxicity. Toxicol. Appl. Pharmacol. 76: 437-453.

Cox, G.E., D.E. Bailey and K. Morgareidge. 1975. Toxicity studies in rats with 2-butanol including growth, reproduction and teratologic observations. Food and Drug Research Laboratories, Inc., Waverly, NY, Report No. 91MR R 1673.

Deacon, M.M., M.D. Pilny, J.A. John et al. 1981. Embryo- and fetotoxicity of inhaled methyl ethyl ketone in rats. Toxicol. Appl. Pharmacol. 59: 620-622.

Dietz, F.K. and G.J. Traiger. 1979. Potentiation of CCl4 of hepatotoxicity in rats by a metabolite of 2-butanone: 2,3-butanediol. Toxicology. 14: 209-215.

Dietz, F.K., M. Rodriguez-Giaxola, G.J. Traiger, V.J. Stella and K.J. Himmelstein. 1981. Pharmacokinetics of 2-butanol and its metabolites in the rat. J. Pharmacokin. Biopharmacol. 9(5): 553-576.

DiVincenzo, G.D., C.J. Kaplan and J. Dedinas. 1976. Characterization of the metabolites of methyl n-butyl ketone, methyl iso-butyl ketone and methyl ethyl ketone in guinea pig serum and their clearance. Toxicol. Appl. Pharmacol. 36: 511-522.

DiVincenzo, G.D., M.L. Hamilton, C.J. Kaplan and J. Dedinas. 1977. Metabolic fate and disposition of 14C-labeled methyl n-butyl ketone in the rat. Toxicol. Appl. Pharmacol. 41: 547-560.

Gallo, M.A., B.L. Oser, G.E. Cox and D.E. Bailey. 1977. Studies on the long-term toxicity of 2-butanol. Toxicol. Appl. Pharmacol. 41: 135. (Abstract)

Kessler, W., B. Denk and J.G. Filser. 1988. Species-specific inhalation pharmacokinetics of 2-nitropropane. In: Biologically Based Methods for Cancer Risk Assessment, Series 159, C.C. Travis, Ed. NATO Advanced Science Institute. p. 123-140.



Kimura, E.T., D.M. Ebert and P.W. Dodge. 1971. Acute toxicity and limits of solvent residue for sixteen organic solvents. Toxicol. Appl. Pharmacol. 19: 699-704.

Liira, J., V. Riihimaki and P. Pfaffli. 1988. Kinetics of methyl ethyl ketone in man: Absorption, distribution and elimination in inhalation exposure. Int. Arch. Occup. Environ. Health. 60: 195-200.

Mast, T.J., J.A. Dill, J.J. Evanoff, R.L. Rommereim, R.J. Weigel and R.B. Westerberg. 1989. Inhalation developmental toxicology studies: teratology study of methyl ethyl ketone in mice. Final report. PNL-6833 UC-408. Prepared by Pacific Northwest Laboratory, Battelle Memorial Institute under Contract No. DE-AC06-76RLO 1830. National Institute of Environmental Health Sciences, National Toxicology Program under a Related Services Agreement with the U.S. Department of Energy. p. 240.

Perbellini, L., F. Brugnone, P. Mozzo, V. Cocheo and D. Caretta. 1984. Methyl ethyl ketone exposure in industrial workers. Uptake and kinetics. Int. Arch. Occup. Environ. Health. 54: 73-81.

Schwetz, B.A., B.K.J. Leong and P.J. Gehring. 1974. Embryo- and fetotoxicity of inhaled carbon tetrachloride, 1,1-dichloroethane and methyl ethyl ketone in rats. Toxicol. Appl. Pharmacol. 28: 452-464.

Schwetz, B.A., T.J. Mast, R.J. Weigel, J.A. Dill and R.E. Morrissey. 1991. Developmental toxicity of inhaled methyl ethyl ketone in Swiss mice. Fund. Appl. Toxicol. 16: 742-748.

Smyth, H.F., Jr., C.P. Carpenter, C.S. Weil, U.C. Pozzani and J.A. Striegel. 1962. Range-finding toxicity data: list VI. Am. Ind. Hyg. J. March-April: 95-107.

Tanii, H., H. Tsuji and K. Hashiomoto. 1986. Structure-toxicity relationship of monoketones. Toxicol. Lett. 30: 13-17.

Traiger, G.J. and J.V. Bruckner. 1976. The participation of 2-butanone in 2-butanol-induced potentiation of carbon tetrachloride hepatotoxicity. J. Pharmacol. Exp. Ther. 196: 493-500.

U.S. EPA. 1984. Health Assessment Document for Methyl Ethyl Ketone. Prepared by the Office of Health and Environmental Assessment, Environmental Criteria and Assessment Office, Cincinnati, OH for the Office of Solid Waste and Emergency Response, Washington, DC. (Final Draft)


U.S. EPA. 1991. Alpha 2u-globulin: Association with chemically induced renal toxicity and neoplasia in the male rat. Risk Assessment Forum. Washington, DC. EPA/625/3-91/019F.



__VI.B. INHALATION RfC REFERENCES

Altenkirch, H., G. Stoltenburg and H.M. Wagner. 1978. Experimental studies on hydrocarbon neuropathies induced by methyl-ethyl-ketone (MEK). J. Neurol. 219: 159-170.

Broderson, J.R., J.R. Lindsey and J.E. Crawford. 1976. The role of environmental ammonia in respiratory mycoplasmosis in rats. Am. J. Pathol. 85: 115-130.

Cavender, F.L., H.W. Casey, H. Salem, J.A. Swenberg and E.J. Gralla. 1983. A 90-day vapor inhalation toxicity study of methyl ethyl ketone. Fund. Appl. Toxicol. 3(4): 264-270.

Deacon, M.M., M.D. Pilny, J.A. John, et al. 1981. Embryo- and fetotoxicity of inhaled methyl ethyl ketone in rats. Toxicol. Appl. Pharmacol. 59: 620-622.

DeCeaurriz, J., J.P. Desiles, P. Bonnet, B. Marignac, J. Muller and J.P. Guenier. 1983. Concentration-dependent behavioral changes in mice following short-term inhalation exposure to various industrial solvents. Toxicol. Appl. Pharmacol. 67: 383-389.

Dick, R.B., W.D. Brown, J.V. Setzer, B.J. Taylor and R. Shukla. 1988. Effects of short duration exposures to acetone and methyl ethyl ketone. Toxicol. Lett. 43: 31-49.

Geller, I., E. Gause, H. Kaplan and R.J. Hartmann. 1979. Effects of acetone, methyl ethyl ketone and methyl isobutyl ketone on a match-to-sample task in the baboon. Pharmacol. Biochem. Behav. 11: 401-406.

LaBelle, C.W. and H. Brieger. 1955. The vapor toxicity of a composite solvent and its principal components. Am. Med. Assoc. Arch. Ind. Health. 12: 623-627.

Mast, T.J., J.A. Dill, J.J. Evanoff, R.L. Rommereim, R.J. Weigel and R.B. Westerberg. 1989. Inhalation developmental toxicology studies: Teratology study of methyl ethyl ketone in mice. Final Report. Prepared by Pacific Northwest Laboratory, Battelle Memorial Institute, for the National Toxicology Program, Washington, DC. PNL-6833 UC-408.

Nelson, K.W., J.F. Ege, M. Ross, L.E. Woodman and L. Silverman. 1943. Sensory response to certain industrial solvent vapors. J. Ind. Hyg. Toxicol. 25: 282-285.

Patty, F.A., H.H. Schrenk and W.P. Yant. 1935. Acute response of guinea pigs to vapors of some new commercial organic compounds. U.S. Public Health Reports. 50: 1217-1228.

Saida, K., J.R. Mendell and H.S. Weiss. 1976. Peripheral nerve changes



induced by methyl n-butyl ketone and potentiation by methyl ethyl ketone. J. Neuropath. Exp. Neurol. 35(3): 205-225.

Schwetz, B.A., B.K.J. Leong and P.J. Gehring. 1974. Embryo-\and fetotoxicity of inhaled carbon tetrachloride, 1,1-dichloroethane and methyl ethyl ketone in rats. Toxicol. Appl. Pharmacol. 28: 452-464.

Schwetz, B.A., T.J. Mast, R.J. Weigel, D.A. Dill and R.E. Morrissey. 1991. Developmental toxicity of inhaled methyl ethyl ketone in Swiss mice. Fund. Appl. Toxicol. 16: 742-748.

Takeuchi, Y., Y. Ono, N. Hisanaga et al. 1983. An experimental study of the combined effects of n-hexane and methyl ethyl ketone. Br. J. Ind. Med. 40: 199-203.

Toxigenics. 1981. 90-Day vapor inhalation toxicity study of methyl ethyl ketone in albino rats. Submitted to Chemical Industry Institute of Toxicology, Research Triangle Park, NC. Doc. ID 878212064, Microfiche No. 205953.

__VI.C. CARCINOGENICITY ASSESSMENT REFERENCES

Douglas, G.R., E.R. Nestmann, J.L. Betts, et al. 1980. Mutagenic activityin pulp mill effluents. Water chlorination: Environ. Impact Health Effects. 3: 865-880.

Florin, I., L. Rutberg, M. Curvall and C.R. Enzell. 1980. Screening of tobacco smoke constituents for mutagenicity using the Ames test. Toxicology. 18: 219-232.

Horton, A.W., E.L. Bingham, M.J.G. Burton and R. Tye. 1965. Carcinogenesis of the skin. III. The contribution of elemental sulfur and of organic sulfur compounds. Cancer Res. 25: 1759-1763.

Mayer, V.W. and C.J. Goin. 1987. Effects of chemical combinations on the induction of aneuploidy in Saccharomyces cerevisiae. Mutat. Res. 187(1):21-30.


U.S. EPA. 1988. Updated Health Effects Assessment for Methyl Ethyl Ketone. Prepared by the Office of Health and Environmental Assessment, Environmental Criteria and Assessment Office, Cincinnati, OH for the Office of Solid Waste and Emergency Response, Washington, DC.



Zimmermann, F.K., V.M. Mayer, I. Scheel and M.A. Resnick. 1985. Acetone, methyl ethyl ketone, ethyl acetate, acetonitrile and other polar aprotic solvents are strong inducers of aneuploidy in Saccharomyces cerevisiae. Mutat. Res. 149(3): 339-351.

_VII. REVISION HISTORY

Substance Name -- Methyl ethyl ketone (MEK)CASRN -- 78-93-3

-------- -------- --------------------------------------------------------Date Section Description-------- -------- --------------------------------------------------------03/31/1987 I.A.6. Documentation corrected03/01/1988 I.A.2. Paragraph 2 clarified07/01/1989 II. Carcinogen assessment now under review07/01/1989 VI. Bibliography on-line12/01/1989 II. Carcinogen assessment on-line12/01/1989 VI.C. Carcinogen references added04/01/1990 I.B. Inhalation RfC now under review06/01/1990 I.A. Oral RfD summary noted as pending change06/01/1990 IV.F.1. EPA contact changed08/01/1991 I.A. Withdrawn pending further review08/01/1991 VI.A. Oral RfD references withdrawn01/01/1992 IV. Regulatory Action section on-line07/01/1992 I.B. Inhalation RfC on-line07/01/1992 VI.B. Inhalation RfC references on-line08/01/1992 VI.B. Inhalation RfC references clarified10/01/1992 I.A. Work group review date added12/01/1992 I.A. Work group review date added05/01/1993 I.A. Oral RfD summary replaced; RfD changed05/01/1993 VI.A. Oral RfD references replaced06/01/1993 VI.C. Minor correction04/01/1997 III.,IV., Drinking Water Health Advisories, EPA Regulatory Actions, and V. Supplementary Data were removed from IRIS on or before April 1997. IRIS users were directed to the appropriate EPA Program Offices for this information.



VIII. SYNONYMS


78-93-3aethylmethylketon2-butanonebutanone-2ethyl methyl cetoneethylmethylketonethyl methyl ketoneketone, ethyl methylmeetcoMEKmethyl acetoneMethyl Ethyl KetonemetiletilchetonemetyloetyloketonRCRA waste number U159UN 1193UN 1232.

Last updated: 5 May 1998URL: http://www.epa.gov/iris/subst/0071.htm



http://www.epa.gov/ngispgm3/iris/index.html

http://www.epa.gov/ngispgm3/iris/subst/index.html


http://www.epa.gov/ngispgm3/iris/search.htm

http://www.epa.gov/ncea/

http://www.epa.gov/ord/

http://www.epa.gov/

OPPT Chemical Fact Sheet EPA 749-F-94-015

CHEMICALS IN THE ENVIRONMENT: METHYL ETHYL KETONE (CAS NO. 78-93-3) prepared by OFFICE OF POLLUTION PREVENTION AND TOXICS U.S. ENVIRONMENTAL PROTECTION AGENCY September 1994

_______________________________________________________________________

Chemicals can be released to the environment as a result of theirmanufacture, processing, and use. EPA has developed informationsummaries on selected chemicals to describe how you might be exposed tothese chemicals, how exposure to them might affect you and theenvironment, what happens to them in the environment, who regulatesthem, and whom to contact for additional information. EPA is committedto reducing environmental releases of chemicals through source reductionand other practices that reduce creation of pollutants._______________________________________________________________________

WHAT IS METHYL ETHYL KETONE, HOW IS IT USED, AND HOW MIGHT I BE EXPOSED?

Methyl ethyl ketone (also called MEK and 2-butanone) is a colorless,flammable liquid. It occurs naturally in certain foods and beverages. It is produced in large amounts (estimated to be 500 million pounds in1992) by three companies in the United States. US demand for MEK islikely to decrease gradually until makers of protective surface coatingsbegin using other substances. Once companies make this change, USdemand for MEK is likely to fall more rapidly. The largest users of MEKare companies that add it to protective surface coatings. Othercompanies add MEK to adhesives, printing inks, paint removers, andspecial lubricating oils. Companies also use MEK to make otherchemicals, including those used as drugs and cosmetics. Small amountsof MEK are used to sterilize surgical instruments, hypodermic needles,syringes, and dental instruments. It is also used to extract vegetableoil.

Exposure to MEK can occur in the workplace or in the environmentfollowing releases to air, water, land, or groundwater. Exposure canalso occur when people use certain paints, paint removers, or adhesives. Methyl ethyl ketone enters the body when breathed in with contaminatedair or when consumed with contaminated food or water. It can also beabsorbed through skin contact. It is not likely to remain in the bodydue to its breakdown and removal in expired air and in urine.

WHAT HAPPENS TO METHYL ETHYL KETONE IN THE ENVIRONMENT?

Methyl ethyl ketone evaporates when exposed to air. It dissolveswhen mixed with water. Most direct releases of MEK to the environmentare to air. It can also evaporate from water and soil exposed to air. Once in air, it is expected to break down to other chemicals. Microorganisms that live in water and in soil can also break down MEK. Because it is a liquid that does not bind well to soil, MEK that makesits way into ground can move through the ground and enter groundwater. Plants and animals are not likely to store methyl ethyl ketone.

HOW DOES METHYL ETHYL KETONE AFFECT HUMAN HEALTH AND THE ENVIRONMENT?

Effects of methyl ethyl ketone on human health and the environmentdepend on how much MEK is present and the length and frequency of

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exposure. Effects also depend on the health of a person or thecondition of the environment when exposure occurs.

Breathing MEK for short periods of time, such as when painting in apoorly vented area, can adversely affect the nervous system. Effectsrange from headaches, dizziness, nausea, and numbness in fingers andtoes to unconsciousness. MEK vapor irritates the eyes, the nose, andthe throat. Direct, prolonged contact with liquid methyl ethyl ketoneirritates the skin and damages the eyes. These effects are not expectedto occur at levels of MEK that are normally found in the environment.

Human health effects associated with breathing or otherwise consumingsmaller amounts of methyl ethyl ketone over long periods of time are notknown. Workers have developed dermatitis, upset stomachs, loss ofappetite, headaches, dizziness, and weakness as a result of repeatedexposure to MEK. Laboratory studies show that exposure to large amountsof MEK in air causes animals to give birth to smaller offspring. Studies also show that repeat exposure to large amounts of MEK in aircauses adverse liver and kidney effects in animals.

Methyl ethyl ketone by itself is not likely to cause environmentalharm at levels normally found in the environment. MEK can contribute tothe formation of photochemical smog when it reacts with other volatileorganic carbon substances in air.

WHAT EPA PROGRAM OFFICES REGULATE METHYL ETHYL KETONE, AND UNDER WHAT LAWSIS IT REGULATED?__________________________________________________________________________ EPA OFFICE LAW PHONE NUMBER__________________________________________________________________________ Pollution Prevention Toxic Substances Control Act (202) 554-1404 & Toxics Emergency Planning and Community Right-to-Know Act (EPCRA) Regulations (Sec. 313) (800) 535-0202 Toxics Release Inventory data (202) 260-1531 Air Clean Air Act (919) 541-0888 Solid Waste & Comprehensive Environmental Emergency Response Response, Compensation, and Liability Act (Superfund)/ Resource Conservation and Recovery Act / EPCRA (Sec. 304/311/312) (800) 535-0202 Water Safe Drinking Water Act (800) 426-4791

A technical support document can be requested from the TSCA AssistanceInformation Service, (202) 554-1404.

WHAT OTHER FEDERAL AGENCIES OR GROUPS CAN I CONTACT FOR INFORMATION ONMETHYL ETHYL KETONE?__________________________________________________________________________ AGENCY/GROUP PHONE NUMBER__________________________________________________________________________ Agency for Toxic Substances and Disease Registry (404) 639-6000 American Conference of Governmental Industrial Hygienists (513) 742-2020 Consumer Product Safety Commission (301) 504-0994 Food and Drug Administration (301) 443-3170 National Institute for Environmental Health Sciences (EnviroHealth Clearinghouse) (800) 643-4794 National Institute for Occupational Safety and Health (NIOSH) (800) 356-4674



Occupational Safety and Health Administration (Check your local phone book under U.S. Department of Labor)



EPA 749-F-94-015a

CHEMICAL SUMMARY FOR METHYL ETHYL KETONE prepared by OFFICE OF POLLUTION PREVENTION AND TOXICS U.S. ENVIRONMENTAL PROTECTION AGENCY September 1994

This summary is based on information retrieved from a systematic search limited to secondary sources (see Appendix A). These sources include online databases, unpublished EPA information, government publications, review documents, and standard reference materials. No attempt has been made to verify information in these databases and secondary sources.

I. CHEMICAL IDENTITY AND PHYSICAL/CHEMICAL PROPERTIES

The chemical identity and physical/chemical properties of methylethyl ketone are summarized in Table 1.

TABLE 1. CHEMICAL IDENTITY AND CHEMICAL/PHYSICAL PROPERTIES OF METHYL ETHYL KETONE _______________________________________________________________________

Characteristic/Property Data Reference_______________________________________________________________________

CAS No. 78-93-3 Common Synonyms 2-Butanone, MEK Verschueren 1983Molecular Formula C4H80 Chemical Structure O || CH3-C-CH2-CH3 Physical State liquid Budavari 1989Molecular Weight 72.10 Budavari 1989Melting Point -86øC Budavari 1989Boiling Point 79.6øC Budavari 1989Water Solubility 353 g/L @ 10øC; 190 g/L @ 90øC Verschueren 1983Specific gravity 0.805 @ 20/4øC Verschueren 1983Vapor Density (air = 1) 2.41 Verschueren 1983KOC 4.5 -50 (estimated) U.S. EPA 1989Log KOW 0.29 (estimated) U.S. EPA 1989Vapor Pressure 77.5 mm Hg @ 20øC Verschueren 1983 98.0 mm Hg @ 25øC U.S. EPA 1985Reactivity Liquid and vapor are flammable. U.S. Air Force 1989Flash Point -6øC (closed cup) Budavari 1989Henry's Law Constant 4.16 to 6.11 X 10-5 atm-m3/mol @ 25øC (estimated) U.S. EPA 1985Fish Bioconcentration Factor <1 (estimated) U.S. EPA 1985Odor Threshold 5 to 10 ppm (in air) U.S. Air Force1989Conversion Factors 1 ppm = 2.94 mg/m3 1 mg/m3 = 0.34 ppm Verschueren 1983_______________________________________________________________________

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II. PRODUCTION, USE, AND TRENDS

A. Production

There are three methyl ethyl ketone producers in the United States. Table 2 lists producers, plant locations, and plant capacities. Annual US capacity is approximately 545 million pounds. In 1992, an estimated 494 million pounds of methyl ethyl ketone were produced in the US. During that same year, 55 million pounds were imported into the US and 112 million pounds were exported (Mannsville 1993).

B. Use

Methyl ethyl ketone is used in a number of industrial applications.

The primary use of methyl ethyl ketone, accounting for approximately 63 percent of all use, is as a solvent in protective coatings. It is also used as a solvent in adhesives; printing inks; paint removers; in the production of magnetic tapes; and in dewaxing lubricating oil. Methyl ethyl ketone is used as a chemical intermediate in several reactions, including condensation; halogenation; ammonolysis; and oxidation. Small amounts of methyl ethyl ketone are also used as a sterilizer for surgical instruments, hypodermic needles, syringes, and dental instruments; as an extraction solvent for hardwood pulping and vegetable oil; and as a solvent in pharmaceutical and cosmetic production (Mannsville 1993; HSDB 1994). Table 3 shows the estimated 1992 US end-use pattern for methyl ethyl ketone.

C. Trends

Demand for methyl ethyl ketone is expected to decrease gradually until alternative, low volatile organic carbon (VOC) coating technologies are readily available (Mannsville 1993). Once such alternatives are available, demand is expected to decrease more rapidly.

TABLE 2. United States Producers of Methyl Ethyl Ketone_______________________________________________________________________Company Plant Location Plant Capacity (in millions of pounds)_______________________________________________________________________

Exxon Chemical Baton Rouge, LA 230Hoechst Celanese Pampa, TX 85Shell Chemical Norco, LA 230_______________________________________________________________________Source: Mannsville 1993.

TABLE 3. Estimated 1992 United States End-Use Pattern of Methyl Ethyl Keton _______________________________________________________________________

Use of Methyl Ethyl Ketone Percentage of US (typical Standard Industrial Methyl Ethyl Ketone UseClassification (SIC) Code) (see end note 1) _________________________________________________________________________

Protective coatings solvent



(production, SIC 2851) 63%Adhesives solvent (production, SIC 2891) 13%Magnetic tapes (production, SIC 3652, 3695) 10%Lubricating oil dewaxing (production, SIC 2992) 5%Chemical intermediate (production, SIC 2865, 2869) 4%Printing inks (production, SIC 2893) 3%Miscellaneous (no applicable SIC Code(s)) 2%_______________________________________________________________________Source: Mannsville 1993.

III. ENVIRONMENTAL FATE

A. Environmental Release

Of the total methyl ethyl ketone released to the environment almost all eventually enters the air. Methyl ethyl ketone is released into the environment from industrial and domestic uses. The largest man made sources of methyl ethyl ketone release are from its primary use as a solvent for coatings, resins, and adhesives (U.S. EPA 1985). Methyl ethyl ketone has been found in cigarette smoke (500 ppm) and in gasoline engine exhaust (<0.1-1.0 ppm) (Verschueren 1983). Its use as a solvent in polyvinyl chloride pipe joint cement has introduced the chemical into drinking water (4.5 ppm, 6 months after installation) (HSDB 1994). It occurs naturally and has been found in a number of foods and beverages including swiss cheese (0.3 ppm), cream (0.154-0.177 ppm), barley, bread, honey, oranges, black tea, rum, non-alcoholic beverages (70 ppm), and ice cream (270 ppm) (HSDB 1994).

In 1992, releases of methyl ethyl ketone to environmental media, as reported to the Toxic Chemical Release Inventory by certain types of US industries totaled about 91.3 million pounds. Of this amount, a total of 90.5 million pounds (99%) was released to the atmosphere, 153 thousand pounds were released to surface water, 365 thousand pounds to underground injection, and 242 thousand pounds were released to land (TRI92 1994).

Although the atmospheric concentration of methyl ethyl ketone increases during episodes of severe photochemical smog (up to 14 ppb in Los Angeles, CA during a photochemical pollution episode), ambient concentrations are usually below the detection limit (0.01 ppb) in most urban areas. Air levels averaging 64 ppb have been measured near industrial sources of the chemical, and a concentration of 94 ppm has been measured in the vicinity of a chemical reclamation plant (HSDB 1994). Methyl ethyl ketone was detected in less than 5% of groundwater samples in a federal survey of drinking water supplies, and in only one (found at a level of 23 ppb) of 204 sites from 14 heavily industrialized river basins in the United States. The chemical has been detected in clouds, fog, and ice fog in California (trace-0.47 ppm in positive samples), but not detected in rain. It was found in rain in Japan. It was also detected in the trench leachate from two low-level radioactive disposal sites (HSDB 1994).

B. Transport

Methyl ethyl ketone is not expected to be retarded by adsorption to soils rich in organic material [estimated Koc = 4.5-50 (U.S. EPA 1989)]; therefore, it is expected to be mobile in soil and,



subject to leaching from landfills. The relatively high vapor pressure [98.0 mm Hg @ 25øC (U.S. EPA 1985)] and estimated Henry's Law constant (4.16-6.11 x 10-5 atm m3/mol @ 25øC) indicate that it can volatilize from moist and dry soil (HSDB 1994). It does not adsorb significantly to suspended solids, and will volatilize to the atmosphere from surface waters (HSDB 1994; U.S. EPA 1985).

C. Transformation/Persistence

1. Air - The main degradation pathway for methyl ethyl ketone in the atmosphere is reaction with photochemically produced hydroxyl radicals, primarily producing acetaldehyde. The half- life of methyl ethyl ketone from the reaction with hydroxyl radicals has been estimated to be about 2.3 days (HSDB 1994). Direct photolysis with a calculated half-life of about 15.4 hours at a solar zenith angle of 30ø is expected to occur (U.S. EPA 1985). Deposition by rain or fog may play a minor role in transporting methyl ethyl ketone from the atmosphere. It has also been shown to be reactive in smog chamber studies (U.S. EPA 1985).

2. Soil - In wet or dry soil, methyl ethyl ketone will volatilize to air and may undergo photolysis on the soil surface (U.S. EPA 1985). It is also highly mobile and may be leached from the soil by water, and has been shown to be degradated by cultures of soil bacteria (U.S. EPA 1985).

3. Water - The most important fate process for methyl ethyl ketone in water is volatilization (estimated half-times of 3 and 12 days, for rivers and lakes, respectively). Complete aerobic biodegradation of methyl ethyl ketone has been reported in about 5-10 days following inoculation with sewage or polluted surface water. Longer times were required for degradation in marine water. Anaerobic degradation occurred after an acclimation period of about one week (HSDB 1994). Direct photolysis near the surface is also thought to be a possible mechanism, but was not measured (HSDB 1994). It is not expected to undergo chemical hydrolysis or to be bound to sediment or suspended organic matter (HSDB 1994). 4. Biota - Methyl ethyl ketone is not expected to bioconcentrate in fish or aquatic organisms; its estimated fish bioconcentration factor is less than 1 (U.S. EPA 1985).

IV. HUMAN HEALTH EFFECTS

A. Pharmacokinetics

1. Absorption - Studies in humans and animals have demonstrated that methyl ethyl ketone can be absorbed via the lungs, the skin, and the gastrointestinal system. The concentration of methyl ethyl ketone in the atmosphere has been correlated with the alveolar concentration (70% alveolar retention) and blood levels in humans (U.S. EPA 1985). Pulmonary absorption values range from 41.1% to 55.8% (WHO 1993). The relative uptake through the lungs by humans was about 53% through a 4 hour exposure at 200 ppm (HSDB 1994; WHO 1993). Oral studies in rats have demonstrated that the peak blood level of methyl ethyl ketone (0.95 mg/mL) was reached in 4 hours following oral



administration of the chemical in water (1690 mg/kg) (U.S. EPA 1985). Methyl ethyl ketone can also be absorbed through intact human skin. A steady state concentration in expired air was reached in 2-3 hours following exposure of the palmar surface of the forearm of volunteers (Krasavage et al. 1982). Absorption is more rapid through moist skin than through dry skin, and the rate of percutaneous absorption has been estimated to range from 5 to 10 micrograms/cm2/min (WHO 1993).

2. Distribution - The relative solubility of methyl ethyl ketone in various human tissues and organs compared to blood (tissue/blood partition coefficient) was shown to be similar in the kidney, liver, brain, heart, and lung and in fat and muscle tissue. This indicates a potential for even and widespread distribution of methyl ethyl ketone in human tissues (U.S. EPA 1985). It has also been shown to cross the placenta and enter the human fetus (WHO 1993).

3. Metabolism - Experiments with guinea pigs and rats have shown that methyl ethyl ketone is metabolized by oxidative hydroxylation, forming 3-hydroxy-2-butanone, which is further reduced to 2,3-butanediol. Methyl ethyl ketone is also reversibly reduced to 2-butanol (U.S. EPA 1985). 4. Excretion - The half-life of methyl ethyl ketone in the blood of guinea pigs was reported to be 270 minutes, following intraperitoneal injection of 450 mg/kg. The clearance time was 12 hours (U.S. EPA 1985). It has been estimated that humans eliminate 30 to 40% of methyl ethyl ketone intake in expired air (HSDB 1994). The unchanged chemical and its metabolite, 3-hydroxy-2-butanone were measured in the urine of workers occupationally exposed to 8 to 272 mg/m3. The metabolite was only identified in workers exposed to the higher levels, and was correlated with the level of exposure and the urinary concentration of methyl ethyl ketone (U.S. EPA 1985). The plasma half-time in humans has be estimated at 49-96 minutes with an apparent clearance rate of 0.6 L/minute (ATSDR 1992). B. Acute Toxicity

Acute exposure to moderate to high doses of methyl ethyl ketone can cause headaches, nausea, and irritation of the eyes and respiratory tract; high doses can also result in narcosis. Eye contact with liquid methyl ethyl ketone can cause corneal injury. 1. Humans - Volunteers complained of mild nose and throat irritation when exposed to 100 ppm. The irritation became objectionable when the concentration was raised to 300 ppm (ATSDR 1992). Workers occupationally exposure to an atmosphere containing 300 to 500 ppm (126 to 210 mg/kg/day) (see end note 2) complained of headaches, nausea, and respiratory tract irritation. Momentary exposure to 33,000 or 100,000 ppm caused intolerable irritation of the eyes, nose and throat (Krasavage et al. 1982). Workers exposed either by inhalation (300-600 ppm) or by skin contact to methyl ethyl ketone developed numbness in the extremities and dermatitis. High concentrations can result in central nervous system depression (see Section IV.G.1.). Eye contact with liquid methyl ethyl ketone causes painful irritation, and can result in corneal injury (Krasavage et al. 1982; HSDB 1994).



2. Animals - Oral LD50 values of 2737 and 4050 mg/kg were reported for rats and mice, respectively. Inhalation LC50 values of 23,500 mg/m3/8 hours for rats and 40,000 mg/m3/2 hours for mice were reported (U.S. EPA 1985). Guinea pigs exposed to 10,000 ppm methyl ethyl ketone developed liver and kidney congestion, but no effects were seen at 3500 ppm (ATSDR 1992). C. Subchronic/Chronic Effects

Human studies have indicated that extended or repeated exposure to relatively high concentrations of methyl ethyl ketone can result in adverse central nervous system effects. Animal studies indicate that extended or repeated inhalation exposure to relatively high concentrations of methyl ethyl ketone can result in hepatic and renal toxicity.

1. Humans - Dermatitis, gastrointestinal upset, loss of appetite and weight, and neurological problems (see Section IV.G.1.) were reported by individuals occupationally exposed to methyl ethyl ketone, apparently in the absence of other solvents (WHO 1993). Neurological problems were also reported by workers chronically exposed to 300-600 ppm of the chemical (WHO 1993). All other available studies describing subchronic/chronic occupational exposure involved a mixture of organic solvents that contained methyl ethyl ketone. A variety of nervous system effects were consistently described after prolonged exposure to these mixtures (see Section IV.G.1.) (WHO 1993).

2. Animals - Male and female Fischer 344 rats were exposed to 0, 1250, 2500, or 5000 ppm methyl ethyl ketone by inhalation 6 hours/day, 5 days/week, for 90 days. No treatment related differences in food consumption, in eye effects, in neurological functioning, or in histopathologies were reported (U.S. EPA 1985). Increased serum alanine amino transferase in females was the only effect at 2500 ppm; increased absolute and relative liver weight were seen in both sexes at 5000 ppm. Females also developed decreased relative brain weight, and increased blood levels of alkaline phosphatase, glucose, and potassium at 5000 ppm. The mean body weights of both sexes were decreased at 5000 ppm, but increased at the other dose levels compared to the controls.

In another inhalation study Fischer 344 rats were exposed by inhalation to 5041 ppm (14,870 mg/m3), 2518 ppm, or 1254 ppm methyl ethyl ketone for 6 hours/ day, 5 days/week for 90 days. No significant effects on food consumption, eyes, or morphology were observed (WHO 1993). Increased absolute and relative liver weight, decreased body weight, increased relative kidney weight, decreased relative brain and spleen weights, and increased mean corpuscular hemoglobin were reported at the high dose. Increased body weights were reported at the low and intermediate dose.

Male rats exposed to 10,000 ppm methyl ethyl ketone 8 hours/day, 7 days/week developed severe irritation in the upper respiratory tract within a few days and died during the 7th week of exposure of bronchopneumonia (ATSDR 1992).

D. Carcinogenicity

There is inadequate information to evaluate the carcinogenicity of



methyl ethyl ketone in humans and in laboratory animals. 1. Humans - No excess cancer incidence was found in an epidemiological study of 446 male workers in two methyl ethyl ketone dewaxing plants. The deaths observed were below the expected, and overall deaths from cancer were also below the expected. An increase in tumors of the buccal cavity and pharynx was seen but the numbers were small (2 observed, 0.13 expected) and lung cancers were significantly decreased (1 observed, 6.02 expected) (ATSDR 1992; WHO 1993). The overall cancer-related mortality was less than expected in another epidemiological study of 1008 male oil refinery workers exposed to 1-4 ppm methyl ethyl ketone. There were no increases in buccal and pharyngeal cancers seen in this study (ATSDR 1992).

2. Animals - Methyl ethyl ketone was applied to the skin of mice twice weekly for one year (50 mg/dose). No tumors were reported (U.S. EPA 1989). No information on the carcinogenicity of methyl ethyl ketone by other routes of administration were found in the secondary sources searched.

E. Genotoxicity

Results from four out of the five short term mutagenicity assays, requested by and submitted to EPA under the Toxic Substances Control Act (TSCA), indicate methyl ethyl ketone is not mutagenic. Methyl ethyl ketone is negative in the Ames test (in Salmonella typhimurium strains TA98, TA100, TA1535, and TA1537 with or without S-9 metabolic activation); the mouse lymphoma test; the cell transformation assay; and the mouse micronucleus test. Results from the Section 4 unscheduled DNA test was concluded to be positive (Cimino 1985).

Most of the information from other secondary sources also indicate that methyl ethyl ketone is not genotoxic. Methyl ethyl ketone was negative in E. coli tester strains WP2 and WP2uvrA (WHO 1993). It was negative in the mitotic gene conversion assay in S. cerevisiae tester strain JD1 (WHO 1993). It was negative in the micronucleus test in both CD1 mice and Chinese hamsters (WHO 1993). It was a strong inducer of aneuploidy in S. cerevisiae strain D61.M (U.S. EPA 1989).

F. Developmental/Reproductive Toxicity

Animal studies indicate that exposure to high methyl ethyl ketone concentrations in air breathed during pregnancy can cause fetal toxicity and possibly adverse developmental effects. EPA has derived an oral reference dose (RfD) (see end note 3) of 0.6 mg/kg/day, based on developmental effects of a metabolite (2-butanol) of MEK. EPA has derived an inhalation reference concentration (RfC) (see end note 4) of 1 mg/m3 for methyl ethyl ketone, based on its developmental effects.

1. Humans - No information on the developmental/reproductive toxicity of methyl ethyl ketone was found in the secondary sources searched.

2. Animals - Since there are no appropriate oral studies on methyl ethyl ketone, the U.S. EPA (1994) calculated a chronic oral RfD for methyl ethyl ketone of 0.6 mg/kg/day, based on decreased birth weights seen in a multigeneration study with its metabolic intermediate, 2-butanol. Male and female Wistar rats (30/sex/



group) were given 2-butanol in drinking water at 0, 0.3, 1.0, or 3.0% nine weeks before mating through gestation and lactation. The high dose was reduced to 2.0% for the second generation. Decreased fetal weight and decreased pup survivability were reported for the first generation at 3.0% 2-butanol. Decreased fetal weight was seen in the second generation at 2.0%. Increases in the incidences of missing sternebrae, wavy ribs, and incomplete vertebrae ossification at 2%, compared to the 1.0 and 0.3% groups, were seen. However, because of high incidences of these developmental effects in the control group, they could not be determined to be treatment related. The 1.0% dose, equivalent to 1771 mg/kg/ day, was identified as a no-adverse-effect-level (NOAEL), and the 2.0% dose was identified as a lowest-adverse-effect-level (LOAEL) (U.S. EPA 1994).

The U.S. EPA (1994) calculated a chronic inhalation reference concentration (RfC) of 1.0 mg/m3 for methyl ethyl ketone, based on decreased fetal birth weight seen in a mouse inhalation study. Pregnant mice were exposed by inhalation to atmospheric concentrations of 0, 398, 1010, or 3020 ppm methyl ethyl ketone 7 hours/day during days 6-15 of gestation. Decreased fetal body weight was seen at 3020 ppm. There was an increased incidence of fetuses and litters with malformations in the treated groups, but the increases were not statistically significant. A NOAEL of 1010 ppm and a LOAEL of 3020 ppm were identified (U.S. EPA 1994).

Groups of 25 pregnant Sprague-Dawley rats were exposed to air concentrations of 400, 1000, or 3000 ppm methyl ethyl ketone 7 hours/day during days 6-15 of gestation. The control group contained 35 rats. Maternal body weight gain was decreased and water consumption was increased in dams receiving 3000 ppm. There were no treatment related effects on the pregnancy rate, the number of implantations per litter, or the percent live fetuses. A total of five fetuses with at least one external or soft tissue malformation were reported, but were distributed in all groups including the control. Increased incidences of delayed ossification and extra ribs at the 3000 ppm dose were attributed to fetal toxicity (U.S. EPA 1989).

G. Neurotoxicity

Neurological effects, observed in humans and animals exposed to high concentrations of methyl ethyl ketone, appear to be reversible. Concentrations high enough to cause central nervous system depression also cause severe pulmonary irritation.

1. Humans - American workers exposed to 300-600 ppm methyl ethyl ketone reported numbness in the fingers and toes. Italian workers chronically exposed to the chemical developed reduced nerve conduction velocities, headaches, dizziness, and muscle hypotrophy (WHO 1993).

Most reports involving human exposure to methyl ethyl ketone describe effects seen after exposure to mixtures of solvents. Methyl ethyl ketone has been shown to potentiate the effects of other solvents, especially n-hexane (U.S. EPA 1989). Workers exposed to a mixture containing methyl ethyl ketone (39 ppm), n-hexane (90 ppm), cyclohexane (92 ppm), and ethyl acetate (57 ppm) complained of sleepiness, dizziness weakness, paraesthesia, and hypo-aesthesia (WHO 1993). Reductions in the maximal motor and distal sensory nerve conduction velocities in



the median and ulnar nerves and decreased maximal motor nerve conduction velocity in the peroneal nerve were reported after 2-8 years exposure to a mixture containing methyl ethyl ketone (60 ppm), n-hexane (196 ppm), cyclohexane (170 ppm) and ethyl acetate (100 ppm). The latency of sensory peak action potentials were increased and the amplitude of peripheral nerve action potentials were decreased. The effects were attributed to n-hexane, possibly potentiated by methyl ethyl ketone (WHO 1993).

2. Animals - Wistar rats exposed to 200 ppm (roughly equivalent to 244 mg/kg/dy) methyl ethyl ketone 12 hours/day, 7 days/week, for 24 weeks exhibited transient increases in motor nerve conduction velocities and decreased distal motor latency. These effects were observed after four weeks of exposure but not after 12 weeks (U.S. EPA 1989). Transient behavioral changes were reported in baboons exposed to 100 ppm for 7 days. Intravenous infusion of 5 mg/kg methyl ethyl ketone per hour into Sprague- Dawley rats resulted in depression of the vestibulo-oculomotor reflex. Depression of the central nervous system followed with continued infusion (WHO 1993). No neuropathology or histological changes were found in several experiments in chickens, cats, rats, and mice exposed to atmospheres containing up to 1500 ppm for up to 12 weeks. Exposure to high concentrations results in narcosis.

Guinea pigs exposed to an atmospheric concentration of 10,000 ppm experience narcosis in four to five hours; however, irritation of the eyes and nose develops within four minutes (Krasavage et al. 1982).

V. ENVIRONMENTAL EFFECTS The toxicity of methyl ethyl ketone in aquatic organisms is low; toxicity values are greater than 100 mg/L. It also has low toxicity in terrestrial rodents for inhalation exposure.

A. Toxicity to Aquatic Organisms

24 Hour LC50 values for fish are: >5000 mg/L for Carassius auratus (goldfish); >400 mg/L for Cyprinodon variegatus (sheepshead minnow); and 5640 mg/L for Lepomis macrochirus (bluegill) (AQUIRE 1994). 96 Hours LC50 values for fish include: 3200 mg/L for Pimephales promelas (fathead minnow); 5600 mg/L for Gambusia affinis (mosquito fish); and 4467 mg/L for Lepomis macrochirus (bluegill) (WHO 1993). 24 Hour LC50 values of 8890 mg/L for Daphnia magna (water flea) and 1950 mg/L for Artemia salina (brine shrimp) were reported (WHO 1993).

B. Toxicity to Terrestrial Organisms

The toxicity information reported for rats and rabbits (see sections IV.B.2. and IV.C.2.) suggests that no adverse effects would be seen at expected environmental concentrations.

C. Abiotic Effects

Methyl ethyl ketone is known to contribute to photochemical smog episodes (Federal Register 1992). Smog chamber studies indicate that methyl ethyl ketone is of intermediate reactivity with degradation rates ranging from 1.5% in one hour to 33% in 6.5 hour (HSDB 1994).



VI. EPA/OTHER FEDERAL ACTIVITY

Voluntary reduction of methyl ethyl ketone environmental releases has occurred since 1991, as a result of a joint industry/EPA pollution prevention initiative known as the 33/50 program. The 1990 Clean Air Act Amendments list methyl ethyl ketone as a hazardous air pollutant. Occupational exposure to methyl ethyl ketone is regulated by the Occupational Safety and Health Administration (OSHA). The permissible exposure limit (PEL) is 200 parts per million parts of air (ppm) as an 8-hour time-weighted average (TWA) (29 CFR 1910.1000) (Mannsville 1993).

Federal agencies/other groups that can provide additional information on methyl ethyl ketone are listed in Table 4 and 5.

TABLE 4. EPA OFFICES AND CONTACT NUMBERS FOR INFORMATION ON METHYL ETHYL KETONE________________________________________________________________________EPA OFFICE LAW PHONE NUMBER________________________________________________________________________Pollution Prevention Toxic Substances Control Act & Toxics (Sec. 4/8A/8D) (202) 554-1404 Emergency Planning and Community Right-to-Know Act (EPCRA) Regulations (Sec. 313) (800) 535-0202 Toxics Release Inventory data (202) 260-1531Air Clean Air Act (919) 541-0888Solid Waste & Comprehensive Environmental Emergency Response Response, Compensation, and Liability Act (Superfund)/ Resource Conservation and Recovery Act / EPCRA (Sec. 304/311/312) (800) 535-0202Water Safe Drinking Water Act (800) 426-4791________________________________________________________________________

TABLE 5. OTHER FEDERAL OFFICE/OTHER GROUP CONTACT NUMBERS FOR INFORMATION ON METHYL ETHYL KETONE__________________________________________________________________________

Other Agency/Department/Other Group Contact Number ___________________________________________________________________________

Agency for Toxic Substances & Disease Registry (404) 639-6000American Conference of Governmental Industrial Hygienists Recommended TLV-TWA: 200 ppm; TLV-STEL 300 ppm (see end note 7) (ACGIH 1991) (513) 742-2020Consumer Product Safety Commission (301) 504-0994Food & Drug Administration (301) 443-3170National Institute for Environmental Health Sciences (EnviroHealth Clearinghouse) (800) 643-4794National Institute for Occupational Safety & Health Recommended TWA: 200 ppm; STEL 300 ppm; IDLH, 3000 ppm (see end note 5) (NIOSH 1992) (800) 356-4674Occupational Safety & Health Administration Check local phone Permissible TWA: 200 ppm book for phone (see end note 6) (OSHA 1993) number under Department of Labor



___________________________________________________________________________

VII. END NOTES

1. Standard Industrial Classification code is the statistical classifica-tion standard for all Federal economic statistics. The code provides a convenient way to reference economic data on industries of interest to the researcher. SIC codes presented here are not intended to be an exhaustive listing; rather, the codes listed should provide an indication of where a chemical may be most likely to be found in commerce.

2. Calculated using the factor, 2.94 (Verschueren 1983), to convert ppmto mg/m3, which is multiplied by 0.1429 (the occupational 8-hourbreathing rate, 10 m3, divided by the assumed adult body weight, 70 kg)to obtain the dose in mg/kg/day assuming 100% absorption (U.S. EPA 1988).

3. The RfD is an estimate (with uncertainty spanning perhaps an order ofmagnitude) of the daily exposure level for the human population, including sensitive subpopulations, that is likely to be without an appreciable risk of deleterious effects during the time period of concern.

4. An inhalation reference concentration is an estimate (with uncertainty spanning perhaps an order of magnitude) of the exposure level for the human population, including sensitive populations, that is likely to be without an appreciable risk of deleterious effects during the time period of concern.

5. TWA, occupational, Time Weighted Average; STEL, occupational, ShortTerm Exposure Limit, 15 min.; IDLH, Immediate Danger to Life and Health.

6. PEL-TWA, Permissible Exposure Limit-Time Weighted Average

7. TLV-TWA, Threshold Limit Value-Time Weighted Average; TLV-STEL,Threshold Limit Value-Short Term Exposure Limit

VIII. CITED REFERENCES

ACGIH. 1991. Documentation of the Threshold Limit Values and Biological Exposure Indices, Sixth edition. American Conference of Governmental Industrial Hygienists, Inc., Cincinnati, OH.

AQUIRE. 1994. Aquatic Information Retrieval online data base. ChemicalInformation Systems, Inc., a subsidiary of Fein-Marquart Assoc.Retrieved Aug, 1994.

ATSDR. 1992. Agency for Toxic Substances and Disease Registry. Toxicological Profile for 2-Butanone. U.S. Department of Health andHuman Services, Public Health Service. Atlanta, GA.

Budavari S, O'Neil MJ, Smith A, Heckelman PE (Eds.). 1989. The MerckIndex, 11th ed. Merck & Co., Inc., Rahway, N.J., p. 820.

Cimino. 1985. Review of Mutagenicity Test Data on MIBK and MEK.Memorandum from M. Cimino (Toxic Effects Branch) to J. Kariya (ChemicalReview and Evaluation Branch), Office of Toxic Substances, Washington,D.C. January 23, 1985.

Federal Register. 1992. Part 51 - Requirements for Preparation, Adoption, and Submittal of Implementation Plans. Fed. Reg. 57:3945.



HSDB. 1994. Hazardous Substances Data Bank. MEDLARS Online InformationRetrieval system, National Library of Medicine. Retrieved 8/3/94.

Krasavage, W.J., J.L. O'Donoghue and G.D. Divincenzo. 1982. Ketones.in: Clayton GD, Clayton FE. 1981-1982. Patty's Industrial Hygiene andToxicology, 3rd ed., Vol. 2C. John Wiley & Sons, New York, pp. 4747-4751.

Mannsville, 1993. Chemical Products Synopsis, Methyl Ethyl Ketone.Mannsville Chemical Products Corporation, 1993.

NIOSH (National Institute for Occupational Safety and Health). 1992.NIOSH Recommendations for Occupational Safety and Health, Compendium ofPolicy Documents and Statements. Cincinnati OH. U.S. Department ofCommerce, National Technical Information Service, PB92-162536, Table 1.

OSHA. 1993. Occupational Safety and Health Administration. AirContaminants Rule, Table Z-1, Limits for Air Contaminants. 29 CFR part1910, Part V, p. 35345.

TRI92. 1994. 1992 Toxics Release Inventory, Public Data Release. U.S.EPA, Office of Pollution Prevention and Toxics (7408).

U.S. Air Force. 1989. Methyl Ethyl Ketone. in: The InstallationRestoration Toxicology Guide, Vols. 1-5. Wright-Patterson Air ForceBase, OH. pp: 41-1 - 41-31.

U.S. EPA. 1985. Health and Environmental Effects Profile for MethylEthyl Ketone. U.S. Environmental Protection Agency, Office of SolidWaste and Emergency Response, Environmental Criteria and AssessmentOffice, Office of Health and Environmental Assessment, Cincinnati, OH.ECAO-CIN-P143.

U.S. EPA. 1988. U.S. Environmental Protection Agency. Methodology forEvaluating Potential Carcinogenicity in Support of Reportable QuantityAdjustments Pursuant to CERCLA Section 102. Carcinogen Assessment Group,Office of Health and Environmental Assessment, U.S. EPA, Washington,D.C., pp. 21, 22. OHEA-C-073.

U.S. EPA. 1989. Updated Health Effects Assessment for Methyl EthylKetone. U.S. Environmental Protection Agency, Office of Solid Waste andEmergency Response, Environmental Criteria and Assessment Office, Officeof Health and Environmental Assessment, Cincinnati, OH. ECAO-CIN-H003a.

U.S. EPA. 1994. Integrated Risk Information System (IRIS) Online.Coversheet for Methyl ethyl ketone. Office of Health and EnvironmentalAssessment, U.S. EPA, Cincinnati, OH. Retrieved 8/94.

Verschueren, K. 1983. Methyl ethyl ketone. in: Handbook ofEnvironmental Data on Organic Chemicals, Second Edition. Van NostrandReinhold Co., New York, pp: 850-852.

WHO (World Health Organization). 1993. Environmental Health Criteria143, Methyl Ethyl Ketone. First draft prepared by R.B. Williams, U.S.EPA. Sponsored by the United Nations Environment Programme, theInternational Labour Organization, and the World Health Organization.WHO, Geneva.

APPENDIX A. SOURCES SEARCHED FOR FACT SHEET PREPARATION

ACGIH. 1991. Documentation of the Threshold Limit Values and



Biological Exposure Indices, Sixth edition. American Conference ofGovernmental Industrial Hygienists, Inc., Cincinnati, OH.

AQUIRE. 1994. IPA ERL-Duluth's Aquatic Ecotoxicology Data Systems. U.S.EPA, Duluth, MN.

ATSDR. 1989-1994. Agency for Toxic Substances and Disease Registry. Toxicological Profiles. Chamblee, GA: ATSDR.

BIODEG. 1994. Syracuse Research Corporation's Environmental Fate DataBases. Syracuse Research Corporation, Syracuse, NY.

Budavari S, O'Neil MJ, Smith A, Heckelman PE (Eds.). 1989. The MerckIndex, 11th ed. Rahway, N.J.: Merck & Co., Inc.

CHEMFATE. 1994. Syracuse Research Corporation's Environmental Fate DataBases. Syracuse Research Corporation, Syracuse, NY.

Clayton GD, Clayton FE. 1981-1982. Patty's Industrial Hygiene andToxicology, 3rd ed., Vol. 2C. New York: John Wiley & Sons.

GENETOX. 1994. U.S. EPA GENETOX Program, computerized database.

HSDB. 1994. Hazardous Substances Data Bank. MEDLARS Online Information Retrieval System, National Library of Medicine.

IARC. 1979-1994. International Agency for Research on Cancer. IARCMonographs on the Evaluation of Carcinogenic Risk of Chemicals to Man.Lyon: IARC.

NIOSH (National Institute for Occupational Safety and Health). 1992.

NIOSH Recommendations for Occupational Safety and Health. Compendium ofPolicy Documents and Statements. Cincinnati, OH: NIOSH.

NTP. 1994. National Toxicology Program. Toxicology and CarcinogenesisStudies. Tech Rep Ser.

NTP. 1994. National Toxicology Program. Management Status Report. Produced from NTP Chemtrack system. April 8, 1994. National ToxicologyProgram, Research Triangle Park, NC.

OSHA. 1994. Occupational Safety and Health Administration. Table Z-2. Limits for Air Contaminants.

RTECS. 1994. Registry of Toxic Effects of Chemical Substances.

MEDLARS Online Information Retrieval System, National Library ofMedicine.

TRI92. 1994. 1992 Toxics Release Inventory, Public Data Release. U.S.

EPA, Office of Pollution Prevention and Toxics (7408).U.S. Air Force. 1989. The Installation Restoration Toxicology Guide,Vols. 1-5. Wright-Patterson Air Force Base, OH.

U.S. EPA (U.S. Environmental Protection Agency). 1991. Table 302.4List of Hazardous Substances and Reportable Quantities 40 CFR, part302.4:3-271.

U.S. EPA. Most current. Drinking Water Regulations and Health



Advisories. Office of Drinking Water, U.S. Environmental ProtectionAgency, Washington, D.C.

U.S. EPA. Most Current. Health Effects Assessment Summary Tables. Cincinnati, OH: Environmental Criteria and Assessment Office, U.S.EPA.

U.S. EPA reviews such as Health and Environmental Effects Documents,Health and Environmental Effect Profiles, and Health and EnvironmentalAssessments.

U.S. EPA. 1994. Integrated Risk Information System (IRIS) Online. Cincinnati, OH: Office of Health and Environmental Assessment.



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International Chemical Safety Cards

METHYL ETHYL KETONE ICSC: 0179

METHYL ETHYL KETONEEthyl methyl ketone

2-ButanoneMEK

Methyl acetoneC4H8O / CH3COCH2CH3

Molecular mass: 72.1

CAS # 78-93-3RTECS # EL6475000ICSC # 0179UN # 1193EC # 606-002-00-3

TYPES OFHAZARD/

EXPOSURE

ACUTE HAZARDS/SYMPTOMS PREVENTION FIRST AID/

FIRE FIGHTING

FIRE Highly flammable. NO open flames, NO sparks, andNO smoking.

Powder, AFFF, foam, carbondioxide.

EXPLOSION

Vapour/air mixtures areexplosive.

Closed system, ventilation,explosion-proof electricalequipment and lighting. Do NOTuse compressed air for filling,discharging, or handling. Usenon-sparking handtools.

In case of fire: keep drums,etc., cool by spraying withwater.

EXPOSURE

● INHALATION Cough. Dizziness. Drowsiness.Headache. Nausea. Vomiting.

Ventilation, local exhaust, orbreathing protection.

Fresh air, rest. Refer formedical attention.

● SKINProtective gloves. Remove contaminated

clothes. Rinse skin withplenty of water or shower.

● EYES

Redness. Pain. Safety goggles. First rinse with plenty ofwater for several minutes(remove contact lenses ifeasily possible), then take to adoctor.

International Chemical Safety Cards (WHO/IPCS/ILO)

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● INGESTIONUnconsciousness. (Further seeInhalation).

Do not eat, drink, or smoke duringwork.

Rinse mouth. Give plenty ofwater to drink. Refer formedical attention.

SPILLAGE DISPOSAL STORAGE PACKAGING &LABELLING

Collect leaking and spilled liquid insealable containers as far as possible.Absorb remaining liquid in sand orinert absorbent and remove to safeplace. Do NOT wash away into sewer.(extra personal protection:self-contained breathing apparatus).

Fireproof. Separated from strongoxidants, strong acids. Cool. Wellclosed.

F symbolXi symbolR: 11-36/37S: (2-)9-16-25-33UN Hazard Class: 3UN Packing Group: II

SEE IMPORTANT INFORMATION ON BACK

ICSC: 0179Prepared in the context of cooperation between the International Programme on Chemical Safety & theCommission of the European Communities © IPCS CEC 1993 No modifications to the International versionhave been made except to add the OSHA PELs, NIOSH RELs and IDLH values.

International Chemical Safety Cards

METHYL ETHYL KETONE ICSC: 0179

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PHYSICAL STATE; APPEARANCE:COLOURLESS LIQUID , WITHCHARACTERISTIC ODOUR.

PHYSICAL DANGERS:The vapour is heavier than air and may travelalong the ground; distant ignition possible.

CHEMICAL DANGERS:Reacts violently with strong oxidants andinorganic acids, causing fire and explosionhazard. Attacks some plastics.

OCCUPATIONAL EXPOSURE LIMITS(OELs):TLV (as TWA): 200 ppm; 590 mg/m3; asSTEL: 300 ppm; 885 mg/m3 (ACGIH 1997).MAK: 200 ppm; 590 mg/m3; D (1992)OSHA PEL: TWA 200 ppm (590 mg/m3)NIOSH REL: TWA 200 ppm (590 mg/m3) ST300 ppm (885 mg/m3)NIOSH IDLH: 3000 ppm

ROUTES OF EXPOSURE:The substance can be absorbed into the bodyby inhalation and by ingestion.

INHALATION RISK:A harmful contamination of the air can bereached rather quickly on evaporation of thissubstance at 20°C.

EFFECTS OF SHORT-TERMEXPOSURE:The substance irritates the eyes and therespiratory tract. The substance may causeeffects on the central nervous system.Exposure far above the OEL may result inunconsciousness.

EFFECTS OF LONG-TERM ORREPEATED EXPOSURE:The liquid defats the skin. Animal tests showthat this substance possibly causes toxic effectsupon human reproduction.



PHYSICALPROPERTIES

Boiling point: 80°CMelting point: -86°CRelative density (water = 1): 0.8Solubility in water, g/100 ml at 20°C: 29Vapour pressure, kPa at 20°C: 10.5Relative vapour density (air = 1): 2.41

Relative density of the vapour/air-mixture at20°C (air = 1): 1.1Flash point: -9°C (c.c.)Auto-ignition temperature: 505°CExplosive limits, vol% in air: 1.8-11.5Octanol/water partition coefficient as log Pow:0.29

ENVIRONMENTALDATA

N O T E S

The odour warning when the exposure limit value is exceeded is insufficient.

Transport Emergency Card: TEC (R)-88.NFPA Code: H1; F3; R0.

ADDITIONAL INFORMATION

ICSC: 0179 METHYL ETHYL KETONE© IPCS, CEC, 1993

IMPORTANT LEGAL NOTICE:

Neither NIOSH, the CEC or the IPCS nor any person acting on behalf of NIOSH,the CEC or the IPCS is responsible for the use which might be made of thisinformation. This card contains the collective views of the IPCS Peer ReviewCommittee and may not reflect in all cases all the detailed requirements includedin national legislation on the subject. The user should verify compliance of thecards with the relevant legislation in the country of use. The only modificationsmade to produce the U.S. version is inclusion of the OSHA PELs, NIOSH RELsand IDLH values.



http://www.cdc.gov/niosh/images/13.gif

Level 1

Chemical Name: Methyl Ethyl Ketone

CAS Registry Number: 78-93-3

Click on red circle(s) to obtain data.

Risk Value ATSDRHealthCanada

ITER RIVM U.S.EPA WHO/IPCS

NoncancerOral

CancerOral

NoncancerInhalation

CancerInhalation

Glossary of ITER definitions

ITER Instructions

All contents © 1997 - 2001 Concurrent Technologies Corporation and TERA.All rights reserved.

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NTP CHEMICAL REPOSITORY (RADIAN CORPORATION, AUGUST 29, 1991) METHYL ETHYL KETONE

-IDENTIFIERS ===========

*CATALOG ID NUMBER: 001254

*CAS NUMBER: 78-93-3

*BASE CHEMICAL NAME: METHYLETHYLKETONE

*PRIMARY NAME: METHYL ETHYL KETONE

*CHEMICAL FORMULA: C4H8O

*STRUCTURAL FORMULA: CH3COCH2CH3

*WLN: 2V1

*SYNONYMS: 2-BUTANONE BUTANONE ETHYL METHYL KETONE KETONE, ETHYL METHYL METHYL ACETONE MEK MEETCO RCRA WASTE NUMBER U159 UN 1193 UN 1232

-PHYSICAL CHEMICAL DATA ======================

*PHYSICAL DESCRIPTION: LITERATURE: Clear colorless liquid REPOSITORY: Clear colorless liquid

*MOLECULAR WEIGHT: 72.11

*SPECIFIC GRAVITY: 0.805 @ 20/4 C [031,055,062,421]

*DENSITY: 0.806 g/mL @ 20 C [371]

*MP (DEG C): -86.3 C [017,047,371]

*BP (DEG C): 79.6 C [017,031,055,205,371]

*SOLUBILITIES: WATER : >=100 mg/mL @ 19 C (RAD)

DMSO : >=100 mg/mL @ 19 C (RAD)

95% ETHANOL : >=100 mg/mL @ 19 C (RAD)

METHANOL : Not available

ACETONE : >=100 mg/mL @ 19 C (RAD)


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TOLUENE : Not available

OTHER SOLVENTS: Benzene: Miscible [031,205] Ether: Miscible [031,205] Industrial organic solvents: Soluble [421] Oils: Miscible [062]

*VOLATILITY: Vapor pressure: 77.5 mm Hg @ 20 C [055,421,430]; 100 mm Hg @ 25.0 C [038] Vapor density : 2.42 [043]

*FLAMMABILITY(FLASH POINT): This chemical has a flash point of -3 C (26 F) [205,269,275]. It is flammable. Fires involving this material can be controlled with a dry chemical, carbon dioxide or Halon extinguisher. A water spray may also be used [036,269,451]. The autoignition temperature is 515 C (960 F) [036,043,051,062, 421].

*UEL: 10% [036,051,062] LEL: 1.8% [043,058,066,430]

*REACTIVITY: This chemical is incompatible with strong oxidizers [058,269,346]. It is also incompatible with chlorosulfonic acid, oleum, hydrogen peroxide, and nitric acid [043]. It can react with potassium tert-butoxide and with chloroform [043,066]. It can also react with bases and strong reducing agents [269]. Vigorous reactions occur with chloroform in the presence of bases, and explosive peroxides are formed with (hydrogen peroxide + nitric acid) [036]. It is also incompatible with 2-propanol [066].

*STABILITY: This chemical is stable under normal laboratory conditions. Solutions of this chemical in water, DMSO, 95% ethanol or acetone should be stable for 24 hours under normal lab conditions (RAD).

*OTHER PHYSICAL DATA: Specific gravity: 0.7997 @ 25/4 C; 0.8255 @ 20/4 C [062] Specific gravity: 0.80615 @ 20/20 C [043,051] Boiling point: 30 C @ 119 mm Hg [017] Refractive index: 1.3788 @ 20 C [047]; 1.3814 @ 15 C [026] Fragrant, mint-like, moderately sharp odor [346] Odor threshold: 2 ppm [055,430] log P octanol: 0.26 [055] Specific heat: 0.549 cal/g [062] Viscosity: 0.40 centipoise @ 25 C [062] Constant boiling mixture with water (88.7%) with a boiling point of 73.4 C [[031] Lambda max: 400-350 nm, 340 nm, 330 nm (A=0.01, 0.10, 1.0) [275]

-TOXICITY ========

*NIOSH REGISTRY NUMBER: EL6475000

*TOXICITY: typ. dose mode specie amount units other TCLo ihl hmn 100 ppm/5M LC50 ihl mus 40 gm/m3/2H LC50 ihl rat 23500 mg/m3/8H LDLo ipr gpg 2000 mg/kg



LD50 ipr mus 616 mg/kg LD50 orl mus 4050 mg/kg LD50 orl rat 2737 mg/kg LD50 skn rbt 6480 mg/kg LC50 ihl mam 38 gm/m3 LD50 ipr rat 607 mg/kg

*AQTX/TLM96: over 1000 ppm

*SAX TOXICITY EVALUATION: THR: Moderately toxic by ingestion, skin contact and intraperitoneal routes. Human systemic effects by inhalation. An experimental teratogen. Experimental reproductive effects. A strong irritant. Human eye irritation @ 350 ppm. Affects peripheral nervous system and central nervous system.

*CARCINOGENICITY: Not available

*MUTATION DATA: test lowest dose | test lowest dose ----------- ----------------- | ----------- ----------------- sln-smc 33800 ppm |

*TERATOGENICITY: Reproductive Effects Data: TCLo: ihl-rat 3000 ppm/7H (6-15D preg) TCLo: ihl-rat 1000 ppm/7H (6-15D preg)

*STANDARDS, REGULATIONS & RECOMMENDATIONS: OSHA: Federal Register (1/19/89) and 29 CFR 1910.1000 Subpart Z Transitional Limit: PEL-TWA 200 ppm [610] Final Limit: PEL-TWA 200 ppm; STEL 300 ppm [610] ACGIH: TLV-TWA 200 ppm; STEL 300 ppm [015,415,421,610] NIOSH Criteria Document: Recommended Exposure Limit to this compound-air: TWA 200 ppm [610] NFPA Hazard Rating: Health (H): 1 Flammability (F): 3 Reactivity (R): 0 H1: Materials only slightly hazardous to health (see NFPA for details). F3: Materials which can be ignited under almost all normal temperature conditions (see NFPA for details). R0: Materials which are normally stable even under fire exposure conditions and which are not reactive with water (see NFPA for details).

*OTHER TOXICITY DATA: Skin and Eye Irritation Data: eye-hmn 350 ppm skn-rbt 500 mg/24H MOD skn-rbt 402 mg/24H MLD skn-rbt 13780 ug/24H open MLD eye-rbt 80 mg Review: Toxicology Review Standards and Regulations: DOT-Hazard: Flammable liquid; Label: Flammable liquid Status: EPA Genetox Program 1988, Inconclusive: B subtilis rec assay EPA TSCA Chemical Inventory, 1986 EPA TSCA 8(a) Preliminary Assessment Information, Final Rule EPA TSCA Test Submission (TSCATS) Data Base, January 1989 NIOSH Analytical Methods: see 2-Butanone, 2500 NIOSH Analytical Methods: see 2-Butanone, Ethanol, and Toluene in blood, 8002



Meets criteria for proposed OSHA Medical Records Rule

-OTHER DATA (Regulatory) =======================

*PROPER SHIPPING NAME (IATA): Ethyl methyl ketone

*UN/ID NUMBER: UN1193

*HAZARD CLASS: 3 SUBSIDIARY RISK: None PACKING GROUP: II

*LABELS REQUIRED: Flammable liquid

*PACKAGING: PASSENGER: PKG. INSTR.: 305, Y305 MAXIMUM QUANTITY: 5 L, 1 L CARGO : PKG. INSTR.: 307 MAXIMUM QUANTITY: 60 L

*SPECIAL PROVISIONS: None

*USES: This compound is used as a solvent in nitrocellulose coating and vinyl film manufacture, in smokeless powder manufacture, in cements and adhesives, dewaxing of lubricating oils, "Glyptal" resins, paint removers, organic synthesis, cleaning fluids, acrylic coatings; intermediate in drug manufacture; manufacture of colorless synthetic resins; swelling agent of resins; intermediate in the manufacture of ketones and amines; and printing catalyst and carrier.

*COMMENTS: Not available

-HANDLING PROCEDURES ===================

*ACUTE/CHRONIC HAZARDS: This compound may be harmful by inhalation, ingestion or skin absorption. It is a severe irritant of the skin and eyes [269]. It is also an irritant of the mucous membranes and upper respiratory tract [151,269]. When heated to decomposition it emits toxic fumes of carbon monoxide and carbon dioxide [269].

*MINIMUM PROTECTIVE CLOTHING: Not available

*RECOMMENDED GLOVE MATERIALS: Permeation Test Results For The Neat (Undiluted) Chemical: The permeation test results for the neat (undiluted) chemical are given below. The breakthrough times of this chemical are given for each glove type tested. The table is a presentation of actual test results, not specific recommendations or suggestions. Avoid glove types which exhibit breakthrough times of less than the anticipated task time plus an adequate safety factor. If this chemical makes direct contact with your glove, or if a tear, puncture or hole develops, replace them at once.

Glove Type Model Number Thickness Breakthrough Time Butyl rubber North B-174 0.61 mm 480 min PVA Edmont 25-545 0.69 mm 320 min Neoprene Edmont 29-870 0.51 mm 10 min Latex Ackwell 5-109 0.13 mm 1 min

*RECOMMENDED RESPIRATOR: When working with this chemical, wear a NIOSH-approved full face chemical cartride respirator equipped with the appropriate organic vapor



cartridges. If that is not available, a half face respirator similarly equipped plus airtight goggles can be substituted. However, please note that half face respirators provide a substantially lower level of protection than do full face respirators.

*OTHER: Not available

*STORAGE PRECAUTIONS: You should store this chemical in an explosion-proof refrigerator and keep it away from oxidizing materials. STORE AWAY FROM SOURCES OF IGNITION.

*SPILLS AND LEAKAGE: If you spill this chemical, FIRST REMOVE ALL SOURCES OF IGNITION. Then, use absorbent paper to pick up all liquid spill material. Seal the absorbent paper, as well as any of your clothing which may be contaminated, in a vapor- tight plastic bag for eventual disposal. Wash any surfaces you may have contaminated with a soap and water solution. Do not reenter the contaminated area until the Safety Officer (or other responsible person) has verified that the area has been properly cleaned.

*DISPOSAL AND WASTE TREATMENT: Not available

-EMERGENCY PROCEDURES ====================

*SKIN CONTACT: IMMEDIATELY flood affected skin with water while removing and isolating all contaminated clothing. Gently wash all affected skin areas thoroughly with soap and water. If symptoms such as redness or irritation develop, IMMEDIATELY call a physician and be prepared to transport the victim to a hospital for treatment.

*INHALATION: IMMEDIATELY leave the contaminated area; take deep breaths of fresh air. If symptoms (such as wheezing, coughing, shortness of breath, or burning in the mouth, throat, or chest) develop, call a physician and be prepared to transport the victim to a hospital. Provide proper respiratory protection to rescuers entering an unknown atmosphere. Whenever possible, Self-Contained Breathing Apparatus (SCBA) should be used; if not available, use a level of protection greater than or equal to that advised under Respirator Recommendation.

*EYE CONTACT: First check the victim for contact lenses and remove if present. Flush victim's eyes with water or normal saline solution for 20 to 30 minutes while simultaneously calling a hospital or poison control center. Do not put any ointments, oils, or medication in the victim's eyes without specific instructions from a physician. IMMEDIATELY transport the victim after flushing eyes to a hospital even if no symptoms (such as redness or irritation) develop.

*INGESTION: DO NOT INDUCE VOMITING. Volatile chemicals have a high risk of being aspirated into the victim's lungs during vomiting which increases the medical problems. If the victim is conscious and not convulsing, give 1 or 2 glasses of water to dilute the chemical and IMMEDIATELY call a hospital or poison control center. IMMEDIATELY transport the victim to a hospital. If the victim is convulsing or unconscious, do not give anything by mouth,



ensure that the victim's airway is open and lay the victim on his/her side with the head lower than the body. DO NOT INDUCE VOMITING. IMMEDIATELY transport the victim to a hospital.

*SYMPTOMS: Symptoms of exposure to this compound may include severe irritation of the eyes, irritation of the skin and upper respiratory tract, headache, dizziness and nausea [058,269]. Other symptoms may include weakness, fatigue, possible respiratory arrest, diarrhea, vomiting, stomach and/or intestinal irritation and unconsciousness [058]. It may cause irritation of the nose and throat, diminished vision, mild vertigo and narcosis [430]. It may also cause central nervous system effects and neuropathy [301]. It may irritate the mucous membranes [151]. Prolonged exposure may produce central nervous system depression [430]. Repeated exposure is reported to cause permanent brain and nervous system damage [058]. Eye contact may result in slight conjunctival hyperemia developing to severe anterior uveitis [099]. It may also result in corneal injury. Prolonged skin contact may defat the skin and produce dermatitis [430]. A drop in rabbit eyes has produced moderate reversible injury [099].

-SOURCES =======

*SOURCES: [015] Lewis, R.J., Sr. and R.L. Tatken, Eds. Registry of Toxic Effects of Chemical Substances. On-line Ed. National Institute for Occupational Safety and Health. Cincinnati, OH. EL6475000. March 28,1989.

[017] Weast, R.C., M.J. Astle, and W.H. Beyer, Eds. CRC Handbook of Chemistry and Physics. 67th Ed. CRC Press, Inc. Boca Raton, FL. 1986. p. C-353, #9161.

[028] Buckingham, J., Ed. Dictionary of Organic Compounds. 5th Ed. Supplement 3. Chapman and Hall. New York. 1985. p. 80, #B-30351.

[031] Windholz, M., Ed. The Merck Index. 10th Ed. Merck and Co. Rahway, NJ. 1983. p. 870, #5945.

[036] Bretherick, L., Ed. Hazards in the Chemical Laboratory. 4th Ed. The Royal Society of Chemistry. London. 1986. p. 212.

[038] Stull, D.R. Vapor pressure of pure substances: Organic Compounds. Industrial and Engineering Chem. 39(4):517-550. 1947. p. 521.

[039] Boublik, T., V. Fried and E. Hala. The Vapor Pressures of Pure Substances. p. 163.

[043] Sax, N.I. and Richard J. Lewis, Sr. Dangerous Properties of Industrial Materials. 7th Ed. Van Nostrand Reinhold. New York. 1989. Vol. II, pp. 594-595, #BOV250.

[047] Weast, R.C. and M.J. Astle, Eds. CRC Handbook of Data on Organic Compounds. CRC Press, Inc. Boca Raton, FL. 1985. Vol. I, p. 334, #B03665.

[051] Sax, N. Irving, Ed. Dangerous Properties of Industrial Materials Report. Bi-monthly Updates. Van Nostrand Reinhold Company, Inc. New York. March/April 1981. Vol. 1, No. 4, pp. 85-87.



[053] Arthur D. Little, Inc. Health and Safety Package for Methyl ethyl ketone. Arthur D. Little, Inc. Cambridge, MA. April 2, 1985.

[055] Verschueren, K. Handbook of Environmental Data on Organic Chemicals. 2nd Ed. Van Nostrand Reinhold. New York. 1983. pp. 850-852.

[058] Information Handling Services. Material Safety Data Sheets Service. Microfiche Ed. Bimonthly Updates. April/May 1989. #2231-087 A-13.

[062] Sax, N.I. and R.J. Lewis Sr., Eds. Hawley's Condensed Chemical Dictionary. 11th Ed. Van Nostrand Reinhold. New York. 1987. p. 769.

[066] Bretherick, L. Handbook of Reactive Chemical Hazards. 3rd Ed. Butterworths. London. 1985. pp. 132, 379, 446-447, 456, 1158, 1729.

[082] U.S. Environmental Protection Agency, Office of Toxic Substances. Toxic Substances Control Act Chemical Substance Inventory: 1985 Edition. 5 Vols. U.S. Environmental Protection Agency. Washington, D.C. January 1986. Listed.

[099] Grant, W. Morton, M.D. Toxicology of the Eye. 3rd Ed. Charles C. Thomas, Publisher. Springfield, IL. 1986. pp. 617-618.

[107] Occupational Health Services, Inc. Hazardline. Occupational Health Services, Inc. New York. Listed.

[110] Oak Ridge National Laboratory. Environmental Mutagen Information Center (EMIC), Bibliographic Data Base. Oak Ridge National Laboratory. Oak Ridge, TN. Listed.

[120] Oak Ridge National Laboratory. Environmental Teratogen Information Center (ETIC), Bibliographic Data Base. Oak Ridge National Laboratory. Oak Ridge, TN. Listed.

[151] Gosselin, R.E., H.C. Hodge, and R.P. Smith. Clinical Toxicology of Commercial Products. 5th Ed. Williams and Wilkins, Co. Baltimore. 1984. p. II-185, #476.

[195] Estrin, F.E., P.A. Crosley and C.R. Haynes, Eds. CFTA Cosmetic Ingredient Dictionary. 3rd Ed. The Cosmetic, Toiletry and Fragrance Assn. Inc. Washington. 1982. p. 163.

[205] Dean, John A., Ed. Lange's Handbook of Chemistry. 13th Ed. McGraw-Hill Book Company. New York. 1985. p. 7-182, #b654.

[269] Lenga, Robert E. The Sigma-Aldrich Library of Chemical Safety Data. Edition 1. Sigma-Aldrich Corporation. Milwaukee, WI. 1985. p. 305, #B.

[275] Aldrich Chemical Company. Aldrich Catalog/Handbook of Fine Chemical. Aldrich Chemical Co., Inc. Milwaukee, WI. 1988. p. 265, #27,069-5.

[295] Reynolds, James E.F., Ed. Martindale The Extra Pharmacopoeia. 28th Ed. The Pharmaceutical Press. London. 1982. p. 1450.



[301] Dreisbach, R.H. Handbook of Poisoning: Prevention, Diagnosis and Treatment. 11th Ed. Lange Medical Publications. Los Altos, CA. 1983. p. 198.

[326] Office of the Federal Register National Archives and Records Administration. Code of Federal Regulations, Title 29, Labor, Parts 1900 to 1910. U.S. Government Printing Office. Washington. 1987. p. 678.

[346] Sittig, M. Handbook of Toxic and Hazardous Chemicals and Carcinogens. 2nd Ed. Noyes, Publications. Park Ridge, NJ. 1985. pp. 601-602.

[371] U.S. Coast Guard, Department of Transportation. CHRIS Hazardous Chemical Data. U.S. Coast Guard. Washington, D.C. 1985. Volume 2.

[401] Nutt, A. R. Toxic Hazards of Rubber Chemicals. Elsevier Applied Science Publishers. New York. 1984. p. 123.

[415] American Conference of Governmental Industrial Hygienists. Threshold Limit Values and Biological Exposure Indices for 1988-1989. American Conference of Governmental Industrial Hygienists. Cincinnati, OH. 1988. p. 27.

[421] American Conference of Governmental Industrial Hygienists. Documentation of the Threshold Limit Values. 5th Ed. American Conference of Governmental Industrial Hygienists. Cincinnati, OH. 1986. p. 395

[430] Clayton, G.D. and F.E. Clayton, Eds. Patty's Industrial Hygiene and Toxicology. Vol. 2. Third Revised Edition. John Wiley and Sons. New York. 1981. Vol. IIC, pp. 4722-4723, 4728- 4733.

[451] National Fire Protection Association. Fire Protection Guide on Hazardous Materials. 9th Ed. National Fire Protection Association. Quincy, MA. 1986. p. 325M-69.

[545] Office of the Federal Register National Archives and Records Administration. Federal Register, Dept. of Labor, Part III. U.S. Government Printing Office. Washington. January 19, 1989. p. 2926.

[610] Clansky, Kenneth B., Ed. Suspect Chemicals Sourcebook: A Guide to Industrial Chemicals Covered Under Major Federal Regulatory and Advisory Programs. Roytech Publications, Inc. Burlingame, CA. 1990. Section 3, p. 21.

[620] United States National Toxicology Program. Chemical Status Report. NTP Chemtrack System. Research Triangle Park, NC. November 6, 1990. Listed.

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New Jersey Department of Health and Senior Services

HAZARDOUS SUBSTANCE FACT SHEET

Common Name: METHYL ETHYL KETONE

CAS Number: 78-93-3DOT Number: UN 1193-------------------------------------------------------------------------

HAZARD SUMMARY* Methyl Ethyl Ketone can affect you when breathed in

and by passing through your skin.* Methyl Ethyl Ketone can irritate the skin causing a rash

and burning feeling on contact. Repeated exposure cancause drying and cracking of the skin.

* Contact can severely irritate and burn the eyes, leading topermanent damage.

* Exposure to the vapor can irritate the eyes, nose, mouth,and throat causing coughing and wheezing.

* Exposure can cause dizziness, lightheadedness, headache,nausea, blurred vision, and may cause you to pass out.

* Repeated exposure can damage the nervous system andmay affect the brain.

* Methyl Ethyl Ketone is a FLAMMABLE LIQUID.

IDENTIFICATIONMethyl Ethyl Ketone is a colorless liquid with a fragrant,mint-like odor. It is used as a solvent and in making plastics,textiles, and paints.

REASON FOR CITATION* Methyl Ethyl Ketone is on the Hazardous Substance List

because it is regulated by OSHA and cited by ACGIH,DEP, DOT, NIOSH, NFPA, HHAG and EPA.

* Definitions are provided on page 5.

HOW TO DETERMINE IF YOU ARE BEINGEXPOSEDThe New Jersey Right to Know Act requires most employersto label chemicals in the workplace and requires publicemployers to provide their employees with information andtraining concerning chemical hazards and controls. Thefederal OSHA Hazard Communication Standard, 1910.1200,requires private employers to provide similar training andinformation to their employees.

* Exposure to hazardous substances should be routinelyevaluated. This may include collecting air samples.Under OSHA 1910.20, you have a legal right to obtaincopies of sampling results from your employer.

* If you think you are experiencing any work-related healthproblems, see a doctor trained to recognize occupationaldiseases. Take this Fact Sheet with you.

RTK Substance number: 1258Date: February 1989 Revision: September 1996-------------------------------------------------------------------------

* ODOR THRESHOLD = 5.4 ppm.* The range of accepted odor threshold values is quite

broad. Caution should be used in relying on odor alone asa warning of potentially hazardous exposures.

WORKPLACE EXPOSURE LIMITSOSHA: The legal airborne permissible exposure limit

(PEL) is 200 ppm averaged over an 8-hourworkshift.

NIOSH: The recommended airborne exposure limit is200 ppm averaged over a 10-hour workshift and300 ppm not to be exceeded during any 15minute work period.

ACGIH: The recommended airborne exposure limit is200 ppm averaged over an 8-hour workshift and300 ppm as a STEL (short term exposure limit).

* The above exposure limits are for air levels only. Whenskin contact also occurs, you may be overexposed, eventhough air levels are less than the limits listed above.

WAYS OF REDUCING EXPOSURE* Where possible, enclose operations and use local exhaust

ventilation at the site of chemical release. If local exhaustventilation or enclosure is not used, respirators should beworn.

* Wear protective work clothing.* Wash thoroughly immediately after exposure to Methyl

Ethyl Ketone and at the end of the workshift.* Post hazard and warning information in the work area. In

addition, as part of an ongoing education and trainingeffort, communicate all information on the health andsafety hazards of Methyl Ethyl Ketone to potentiallyexposed workers.

METHYL ETHYL KETONE page 2 of 6

This Fact Sheet is a summary source of information of allpotential and most severe health hazards that may result fromexposure. Duration of exposure, concentration of thesubstance and other factors will affect your susceptibility toany of the potential effects described below.---------------------------------------------------------------------------

HEALTH HAZARD INFORMATION

Acute Health EffectsThe following acute (short-term) health effects may occurimmediately or shortly after exposure to Methyl EthylKetone:

* Methyl Ethyl Ketone can irritate the skin causing a rashand burning feeling on contact.

* Contact can severely irritate and burn the eyes, leading topermanent damage.

* Exposure to the vapor can irritate the eyes, nose, mouth,and throat causing coughing and wheezing.

* Exposure can cause dizziness, lightheadedness, headache,nausea, blurred vision, and may cause you to pass out.

Chronic Health EffectsThe following chronic (long-term) health effects can occur atsome time after exposure to Methyl Ethyl Ketone and canlast for months or years:

Cancer Hazard* According to the information presently available to the

New Jersey Department of Health and Senior Services,Methyl Ethyl Ketone has not been tested for its ability tocause cancer in animals.

Reproductive Hazard* There is limited evidence that Methyl Ethyl Ketone is a

teratogen in animals. Until further testing has been done,it should be treated as a possible teratogen in humans.

Other Long-Term Effects* Repeated exposure can damage the nervous system and

may affect the brain. Effects may include reducedmemory and concentration, personality changes(withdrawal, irritability), fatigue, sleep disturbances,reduced coordination, and/or effects on nerves supplyinginternal organs (autonomic nerves) and/or nerves to thearms and legs (weakness, "pins and needles").

* Repeated exposure can cause drying and cracking of theskin.

MEDICAL

Medical TestingIf symptoms develop or overexposure is suspected, thefollowing may be useful:

* Interview for brain effects, including recent memory,mood (irritability, withdrawal), concentration, headaches,malaise and altered sleep patterns. Consider cerebellar,autonomic and peripheral nervous system evaluation.Positive and borderline individuals should be referred forneuropsychological testing.

Any evaluation should include a careful history of past andpresent symptoms with an exam. Medical tests that look fordamage already done are not a substitute for controllingexposure.

Request copies of your medical testing. You have a legalright to this information under OSHA 1910.20.

Mixed ExposuresMethyl Ethyl Ketone in combination with Methyl ButylKetone and possibly other solvents can damage the nervoussystem.

WORKPLACE CONTROLS AND PRACTICES

Unless a less toxic chemical can be substituted for ahazardous substance, ENGINEERING CONTROLS are themost effective way of reducing exposure. The best protectionis to enclose operations and/or provide local exhaustventilation at the site of chemical release. Isolatingoperations can also reduce exposure. Using respirators orprotective equipment is less effective than the controlsmentioned above, but is sometimes necessary.

In evaluating the controls present in your workplace,consider: (1) how hazardous the substance is, (2) how muchof the substance is released into the workplace and (3)whether harmful skin or eye contact could occur. Specialcontrols should be in place for highly toxic chemicals or whensignificant skin, eye, or breathing exposures are possible.

In addition, the following controls are recommended:

* Where possible, automatically pump liquid Methyl EthylKetone from drums or other storage containers to processcontainers.

* Specific engineering controls are recommended for thischemical by NIOSH. Refer to the NIOSH criteriadocument: Ketones #78-173.


Good WORK PRACTICES can help to reduce hazardousexposures. The following work practices are recommended:

* Workers whose clothing has been contaminated byMethyl Ethyl Ketone should change into clean clothingpromptly.

* Contaminated work clothes should be laundered byindividuals who have been informed of the hazards ofexposure to Methyl Ethyl Ketone.

* Eye wash fountains should be provided in the immediatework area for emergency use.

* If there is the possibility of skin exposure, emergencyshower facilities should be provided.

* On skin contact with Methyl Ethyl Ketone, immediatelywash or shower to remove the chemical. At the end of theworkshift, wash any areas of the body that may havecontacted Methyl Ethyl Ketone, whether or not knownskin contact has occurred.

* Do not eat, smoke, or drink where Methyl Ethyl Ketoneis handled, processed, or stored, since the chemical can beswallowed. Wash hands carefully before eating, drinking,smoking or using the toilet.

PERSONAL PROTECTIVE EQUIPMENT

WORKPLACE CONTROLS ARE BETTER THANPERSONAL PROTECTIVE EQUIPMENT. However, forsome jobs (such as outside work, confined space entry, jobsdone only once in a while, or jobs done while workplacecontrols are being installed), personal protective equipmentmay be appropriate.

The following recommendations are only guidelines and maynot apply to every situation.

Clothing* Avoid skin contact with Methyl Ethyl Ketone. Wear

solvent-resistant gloves and clothing. Safety equipmentsuppliers/manufacturers can provide recommendations onthe most protective glove/clothing material for youroperation.

* All protective clothing (suits, gloves, footwear, headgear)should be clean, available each day, and put on beforework.

* ACGIH recommends the use of Butyl Rubber materials inprotective clothing.

Eye Protection* Wear splash-proof chemical goggles and face shield when

working with liquid, unless full facepiece respiratoryprotection is worn.

Respiratory ProtectionIMPROPER USE OF RESPIRATORS IS DANGEROUS.Such equipment should only be used if the employer has awritten program that takes into account workplace conditions,requirements for worker training, respirator fit testing andmedical exams, as described in OSHA 1910.134.

* Where the potential exists for exposures over 200 ppm,use a MSHA/NIOSH approved full facepiece respiratorwith an organic vapor cartridge/canister. More protectionis provided by a full facepiece respirator than by a half-mask respirator, and even greater protection is providedby a powered-air purifying respirator.

* If while wearing a filter, cartridge or canister respirator,you can smell, taste, or otherwise detect Methyl EthylKetone, or in the case of a full facepiece respirator youexperience eye irritation, leave the area immediately.Check to make sure the respirator-to-face seal is stillgood. If it is, replace the filter, cartridge, or canister. Ifthe seal is no longer good, you may need a new respirator.

* Be sure to consider all potential exposures in yourworkplace. You may need a combination of filters,prefilters, cartridges, or canisters to protect againstdifferent forms of a chemical (such as vapor and mist) oragainst a mixture of chemicals.

* Where the potential for high exposures exists, use aMSHA/NIOSH approved supplied-air respirator with afull facepiece operated in a pressure-demand or otherpositive-pressure mode. For increased protection use incombination with an auxiliary self-contained breathingapparatus operated in a pressure-demand or otherpositive-pressure mode.

* Exposure to 3,000 ppm is immediately dangerous to lifeand health. If the possibility of exposure above3,000 ppm exists, use a MSHA/NIOSH approved self-contained breathing apparatus with a full facepieceoperated in a pressure-demand or other positive-pressuremode.

HANDLING AND STORAGE

* Prior to working with Methyl Ethyl Ketone you shouldbe trained on its proper handling and storage.

* Methyl Ethyl Ketone must be stored to avoid contactwith STRONG OXIDIZERS (such as CHLORINE,BROMINE and FLUORINE) since violent reactionsoccur.

* Store in tightly closed containers in a cool, well-ventilatedarea away from HEAT, SPARKS or FLAME.


* Sources of ignition, such as smoking and open flames, areprohibited where Methyl Ethyl Ketone is used, handled,or stored in a manner that could create a potential fire orexplosion hazard.

* Metal containers involving the transfer of Methyl EthylKetone should be grounded and bonded. Drums must beequipped with self-closing valves, pressure vacuum bungs,and flame arresters.

* Use only non-sparking tools and equipment, especiallywhen opening and closing containers of Methyl EthylKetone.

QUESTIONS AND ANSWERS

Q: If I have acute health effects, will I later get chronichealth effects?

A: Not always. Most chronic (long-term) effects resultfrom repeated exposures to a chemical.

Q: Can I get long-term effects without ever having short-term effects?

A: Yes, because long-term effects can occur from repeatedexposures to a chemical at levels not high enough tomake you immediately sick.

Q: What are my chances of getting sick when I have beenexposed to chemicals?

A: The likelihood of becoming sick from chemicals isincreased as the amount of exposure increases. This isdetermined by the length of time and the amount ofmaterial to which someone is exposed.

Q: When are higher exposures more likely?A: Conditions which increase risk of exposure include

physical and mechanical processes (heating, pouring,spraying, spills and evaporation from large surface areassuch as open containers), and "confined space"exposures (working inside vats, reactors, boilers, smallrooms, etc.).

Q: Is the risk of getting sick higher for workers than forcommunity residents?

A: Yes. Exposures in the community, except possibly incases of fires or spills, are usually much lower thanthose found in the workplace. However, people in thecommunity may be exposed to contaminated water aswell as to chemicals in the air over long periods.Because of this, and because of exposure of children orpeople who are already ill, community exposures maycause health problems.

Q: Can men as well as women be affected by chemicals thatcause reproductive system damage?

A: Yes. Some chemicals reduce potency or fertility in bothmen and women. Some damage sperm and eggs,possibly leading to birth defects.

Q: Who is at the greatest risk from reproductive hazards?A: Pregnant women are at greatest risk from chemicals that

harm the developing fetus. However, chemicals mayaffect the ability to have children, so both men andwomen of childbearing age are at high risk.

Q: Should I be concerned if a chemical is a teratogen inanimals?

A: Yes. Although some chemicals may affect humansdifferently than they affect animals, damage to animalssuggests that similar damage can occur in humans.

---------------------------------------------------------------------------The following information is available from:

New Jersey Department of Health and Senior ServicesOccupational Disease and Injury ServicesTrenton, NJ 08625-0360(609) 984-1863

Industrial Hygiene InformationIndustrial hygienists are available to answer your questionsregarding the control of chemical exposures using exhaustventilation, special work practices, good housekeeping, goodhygiene practices, and personal protective equipmentincluding respirators. In addition, they can help to interpretthe results of industrial hygiene survey data.

Medical EvaluationIf you think you are becoming sick because of exposure tochemicals at your workplace, you may call a Department ofHealth and Senior Services physician who can help you findthe services you need.

Public PresentationsPresentations and educational programs on occupationalhealth or the Right to Know Act can be organized for laborunions, trade associations and other groups.

Right to Know Information ResourcesThe Right to Know Infoline (609) 984-2202 can answerquestions about the identity and potential health effects ofchemicals, list of educational materials in occupationalhealth, references used to prepare the Fact Sheets, preparationof the Right to Know survey, education and trainingprograms, labeling requirements, and general informationregarding the Right to Know Act. Violations of the lawshould be reported to (609) 984-2202.---------------------------------------------------------------------------


DEFINITIONS

ACGIH is the American Conference of GovernmentalIndustrial Hygienists. It recommends upper limits (calledTLVs) for exposure to workplace chemicals.

A carcinogen is a substance that causes cancer.

The CAS number is assigned by the Chemical AbstractsService to identify a specific chemical.

A combustible substance is a solid, liquid or gas that willburn.

A corrosive substance is a gas, liquid or solid that causesirreversible damage to human tissue or containers.

DEP is the New Jersey Department of EnvironmentalProtection.

DOT is the Department of Transportation, the federal agencythat regulates the transportation of chemicals.

EPA is the Environmental Protection Agency, the federalagency responsible for regulating environmental hazards.

A fetus is an unborn human or animal.

A flammable substance is a solid, liquid, vapor or gas thatwill ignite easily and burn rapidly.

The flash point is the temperature at which a liquid or solidgives off vapor that can form a flammable mixture with air.

HHAG is the Human Health Assessment Group of the federalEPA.

IARC is the International Agency for Research on Cancer, ascientific group that classifies chemicals according to theircancer-causing potential.

A miscible substance is a liquid or gas that will evenlydissolve in another.

mg/m3 means milligrams of a chemical in a cubic meter ofair. It is a measure of concentration (weight/volume).

MSHA is the Mine Safety and Health Administration, thefederal agency that regulates mining. It also evaluates andapproves respirators.

A mutagen is a substance that causes mutations. A mutationis a change in the genetic material in a body cell. Mutationscan lead to birth defects, miscarriages, or cancer.

NAERG is the North American Emergency ResponseGuidebook. It was jointly developed by Transport Canada,the United States Department of Transportation and theSecretariat of Communications and Transportation ofMexico. It is a guide for first responders to quickly identifythe specific or generic hazards of material involved in atransportation incident, and to protect themselves and thegeneral public during the initial response phase of theincident.

NCI is the National Cancer Institute, a federal agency thatdetermines the cancer-causing potential of chemicals.

NFPA is the National Fire Protection Association. Itclassifies substances according to their fire and explosionhazard.

NIOSH is the National Institute for Occupational Safety andHealth. It tests equipment, evaluates and approvesrespirators, conducts studies of workplace hazards, andproposes standards to OSHA.

NTP is the National Toxicology Program which testschemicals and reviews evidence for cancer.

OSHA is the Occupational Safety and Health Administration,which adopts and enforces health and safety standards.

PEOSHA is the Public Employees Occupational Safety andHealth Act, a state law which sets PELs for New Jersey publicemployees.

ppm means parts of a substance per million parts of air. It isa measure of concentration by volume in air.

A reactive substance is a solid, liquid or gas that releasesenergy under certain conditions.

A teratogen is a substance that causes birth defects bydamaging the fetus.

TLV is the Threshold Limit Value, the workplace exposurelimit recommended by ACGIH.

The vapor pressure is a measure of how readily a liquid or asolid mixes with air at its surface. A higher vapor pressureindicates a higher concentration of the substance in air andtherefore increases the likelihood of breathing it in.

page 6 of 6>>>>>>>>>>>>>>>>> E M E R G E N C Y I N F O R M A T I O N <<<<<<<<<<<<<<<<<

Common Name: METHYL ETHYL KETONEDOT Number: UN 1193NAERG Code: 127CAS Number: 78-93-3

Hazard rating NJ DOH NFPA

FLAMMABILITY - 3

REACTIVITY - 0

POISONOUS GASES ARE PRODUCED IN FIRECONTAINERS MAY EXPLODE IN FIRE

Hazard Rating Key: 0=minimal; 1=slight; 2=moderate;3=serious; 4=severe

FIRE HAZARDS

* Methyl Ethyl Ketone is a FLAMMABLE LIQUID.* Use dry chemical, CO2, or alcohol foam extinguishers.

Water should be used to keep fire-exposed containers cool.* POISONOUS GASES ARE PRODUCED IN FIRE.* Vapors may travel to a source of ignition and flash back.* CONTAINERS MAY EXPLODE IN FIRE.* If employees are expected to fight fires, they must be trained

and equipped as stated in OSHA 1910.156.

SPILLS AND EMERGENCIES

If Methyl Ethyl Ketone is spilled or leaked, take the followingsteps:

* Evacuate and isolate the area of the spill or leak, andrestrict persons not wearing protective equipment from areaof spill or leak until clean-up is complete.

* Remove all ignition sources.* Ventilate area of spill or leak.* Absorb liquids in vermiculite, dry sand, earth, or a similar

material and deposit in sealed containers.* Keep Methyl Ethyl Ketone out of a confined space, such as

a sewer, because of the possibility of an explosion, unlessthe sewer is designed to prevent the build-up of explosiveconcentrations.

* It may be necessary to contain and dispose of Methyl EthylKetone as a HAZARDOUS WASTE. Contact yourDepartment of Environmental Protection (DEP) or yourregional office of the federal Environmental ProtectionAgency (EPA) for specific recommendations.

* If employees are required to clean-up spills, they must beproperly trained and equipped. OSHA 1910.120(q) may beapplicable.

=============================================FOR LARGE SPILLS AND FIRES immediately call your firedepartment. You can request emergency information from thefollowing:

CHEMTREC: (800) 424-9300NJDEP HOTLINE: (609) 292-7172=============================================

HANDLING AND STORAGE (See page 3)

FIRST AID

In NJ, POISON INFORMATION 1-800-962-1253

Eye Contact* Immediately flush with large amounts of water for at least

15 minutes, occasionally lifting upper and lower lids. Seekmedical attention.

Skin Contact* Quickly remove contaminated clothing. Immediately wash

area with large amounts of water. Seek medical attention.

Breathing* Remove the person from exposure.* Begin rescue breathing if breathing has stopped and CPR if

heart action has stopped.* Transfer promptly to a medical facility.

PHYSICAL DATA

Vapor Pressure: 70.6 mm Hg at 68oF (20oC)

Flash Point: 21oF (-6.1oC)

Water Solubility: Soluble

OTHER COMMONLY USED NAMES

Chemical Name:2-ButanoneOther Names:MEK; Ethyl Methyl Ketone; Butanone

-----------------------------------------------------------------------------Not intended to be copied and sold for commercialpurposes.-----------------------------------------------------------------------------NEW JERSEY DEPARTMENT OF HEALTH AND SENIOR SERVICESRight to Know ProgramPO Box 368, Trenton, NJ 08625-0368(609) 984-2202-----------------------------------------------------------------------------

Web Sitesthat offer searchable chemical databases, recommended by Scorecard

If you want more detailed information about a chemical than Scorecard provides, there are severalon-line and library resources Scorecard recommends for further research.

ON-LINE CHEMICAL DATABASES

CambridgeSoft Chemfinderhttp://chemfinder.camsoft.com/

Chemfinder gives basic physico-chemical data and molecular structures for chemicals, and provides linksto international data sources addressing specific chemicals.

Hazardous Substances Data Bankhttp://toxnet.nlm.nih.gov/

HSDB focuses on the toxicology of potentially hazardous chemicals, and includes peer-reviewedinformation on human exposure, industrial hygiene, emergency handling procedures, environmental fate,and regulatory requirements.

University of Akron Hazardous Chemicals Databasehttp://ull.chemistry.uakron.edu/erd/

The Hazardous Chemicals Database provides physical data on chemicals and links to Department ofTransportation safety guides that are valuable for emergency response.

BIBLIOGRAPHIC RESOURCES ON CHEMICAL TOXICITY

Scorecard provides qualitative summaries of the health hazards posed by a chemical (e.g., it is asuspected neurotoxicant), but not direct access to supporting toxicological data. These scientific studiesare abstracted in several toxicity databases, which are available in libraries, from commercial vendors,and sometimes on-line. The major toxicity databases include:

The Registry of Toxic Effects of Chemicals Substances (RTECS)RTECS is a database of toxicological information compiled by the National Institute for OccupationalSafety and Health. It contains summary information about the types of health effects chemicals can causeand the concentrations at which toxicity is known to occur. It is available from several commercialvendors at http://www.cdc.gov/niosh/rtecs.html, and can often be found at major public or universitylibraries.

TOXLINEFree access to the National Library of Medicine's toxicology-specific database of abstracts, referencejournal articles, and reports is available at http://www.medscape.com/misc/FormToxlineInfLive.html

Web Sites

http://www.scorecard.org/chemical-profiles/o...93%2d3&edf_chem_name=METHYL%20ETHYL%20KETONE (1 of 2) [3/04/2001 7:59:21 PM]

http://www.scorecard.org/index.tcl

http://chemfinder.camsoft.com/

http://ull.chemistry.uakron.edu/erd/

http://www.cdc.gov/niosh/rtecs.html

http://www.medscape.com/misc/FormToxlineInfLive.html

MEDLINEFree access to the National Library of Medicine's MEDLINE database of more than 9 million referencesto articles published in 3800 biomedical journals is available athttp://www.nlm.nih.gov/databases/freemedl.html. Two Web-based products, PubMed and InternetGrateful Med, provide this access. Medline can also be accessed athttp://www.medscape.com/misc/FormMedlineInfLive.html


Web Sites

http://www.scorecard.org/chemical-profiles/o...93%2d3&edf_chem_name=METHYL%20ETHYL%20KETONE (2 of 2) [3/04/2001 7:59:21 PM]

http://www.nlm.nih.gov/databases/freemedl.html

http://www.medscape.com/misc/FormMedlineInfLive.html



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HSDB

Item 1 of 140

Best Sections1 Synonyms

2 Synonyms

3 Synonyms

4 Synonyms

5EnvironmentalFate/Exposure Summary

6 Atmospheric Concentrations

7 Effluent Concentrations

8Probable Routes of HumanExposure

9Environmental WaterConcentrations

10 Environmental Fate

11EnvironmentalBiodegradation

12Volatilization fromWater/Soil


14Sediment/SoilConcentrations

15 Food Survey Values

16 Effluent Concentrations




20Environmental AbioticDegradation

21 Interactions

22 TSCA Test Submissions

23Emergency MedicalTreatment

24 Interactions



27 Soil Adsorption/Mobility


29 Plant Concentrations


METHYL ETHYL KETONECASRN: 78-93-3For other data, click on the Table of Contents

Best SectionsSynonyms :

ETHYLMETHYLKETON (DUTCH)**PEER REVIEWED**

Synonyms :

AETHYLMETHYLKETON (GERMAN)**PEER REVIEWED**

Synonyms :

METILETILCHETONE (ITALIAN)**PEER REVIEWED**

Synonyms :

METYLOETYLOKETON (POLISH)**PEER REVIEWED**

Environmental Fate/Exposure Summary :

Methyl ethyl ketone's production and use as a solvent for coatings, resins, rubbers, plastics,pharmaceuticals, adhesives and rubber cements will result in its release to the environmentthrough various waste streams. Its use as a starting material or intermediate in the manufactureof chemical products will also lead to its release to the environment. Methyl ethyl ketoneoccurs naturally as a metabolic byproduct of plants and animals and is released into theatmosphere by volcanoes and forest fires. Based on an experimental vapor pressure of 91 mmHg at 25 deg C, methyl ethyl ketone is expected to exist solely as a vapor in the ambientatmosphere. Vapor-phase methyl ethyl ketone is degraded in the atmosphere by reaction withphotochemically-produced hydroxyl radicals with an estimated atmospheric half-life of about 14days. This compound is also expected to undergo photolysis in the atmosphere by naturalsunlight. Photochemical degradation of methyl ethyl ketone by natural sunlight is expected tooccur at approximately 1/5 the rate of degradation by photochemically produced hydroxyradicals. Methyl ethyl ketone is expected to have very high mobility in soils based uponmeasured Koc values of 29 and 34 obtained in silt loams. Volatilization from dry soil surfaces isexpected based upon the vapor pressure of this compound. Volatilization from moist soilsurfaces is also expected based upon the measured Henry's Law constant of 4.7X10-5 atm-cum/mol. The volatilization half-life of methyl ethyl ketone from silt and sandy loams wasmeasured as 4.9 days. This compound is expected to biodegrade under aerobic and anaerobicconditions. In water, methyl ethyl ketone is not expected to adsorb to suspended solids orsediment based upon its measured Koc values. Volatilization from water surfaces is expected tobe an important environmental fate process given its Henry's Law constant. Estimated half-livesfor a model river and model lake are 19 and 197 hours, respectively. Bioconcentration in aquaticorganisms is considered low based upon an estimated BCF value of 1. Occupational exposuremay be through inhalation and dermal contact with this compound at workplaces where methylethyl ketone is produced or used. The general population may be exposed to methyl ethylketone through the use of commercially available products containing this compound such aspaints, adhesives, and rubber cements. Exposure will also arise from inhalation of ambient airand ingestion of drinking water and food that contains methyl ethyl ketone. (SRC)

HSDB Search Results - Frameset

http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:1 (1 of 24) [21/04/2001 9:09:05 AM]

javascript:openDetail()


32 Milk Concentrations

33 Interactions

34Absorption, Distribution &Excretion



37 Interactions


39Non-Human ToxicityExcerpts

40 Special Reports


42 Clinical Laboratory Methods


44 Consumption Patterns

45 Consumption Patterns


47Analytic LaboratoryMethods


49 FDA Requirements

50 FDA Requirements

51 FDA Requirements

52 FIFRA Requirements

53 U. S. Production



56 Atmospheric Standards

57 Threshold Limit Values



60 Body Burden

61 Body Burden


63 Human Toxicity Excerpts


65 Interactions

**PEER REVIEWED**

Atmospheric Concentrations :

URBAN/SUBURBAN: Methyl ethyl ketone was detected at a mean concn of 1.5 ppb inBoston, MA(1). Methyl ethyl ketone was detected at mean concns of 1.35 ppb in Boston, MA,and 5.1 ppb in Houston, TX(2). The average concn of methyl ethyl ketone at 25 urbanlocations in the US was 1.4 ug/cu m(3). Methyl ethyl ketone was detected at a mean concn of1.67 ppb in Los Angeles, CA(4) and in the Caldecott Tunnel in San Francisco, CA at a concn of1.67 mg/l(5). Methyl ethyl ketone was detected at average concns of 0.222-1.366 ppb inGrenoble, France(6). An average concn of 0.638 ppb of methyl ethyl ketone was obtained from714 atmospheric samples in the US(7).[(1) Reiss R et al; J Air Waste Manage Assoc 45: 811-22(1995)(2) Kelly TJ et al; Environ Sci Technol 27: 1146-53 (1993) (3)Kelly TJ et al; Ambient concn summaries for Clean Air Act. TitleIII. Hazardous Air Pollutants. USEPA Contract No 68-D80082USEPA/600/R-94/090 (1993) (4) Grosjean E et al; Environ SciTechnol 30: 2687-2703 (1996) (5) Kirschstetter TW et al; EnvironSci Technol 30: 661-70 (1996) (6) Foster P et al; Pollut Atmos:175-91 (1991) (7) Shah JJ, Heyerdahl EK; Environ Sci Technol 22:1381-88 (1988)]**PEER REVIEWED**

Effluent Concentrations :

Methyl ethyl ketone was detected in the effluent of a municipal landfill in Quebec, Ontario atconcns of 5,200 ppb and 3092 ppb(1). Methyl ethyl ketone was identified, not quantified in theemissions of a waste incinerator in West Germany(2), automobiles(3) and common householdwaste(4-7). Methyl ethyl ketone was detected in the effluent from a solid waste compostingplant at concns of 130 ug/cu m (background air), 25,500 ug/cu m(tipping area), 1,400 ug/cu m(shredder), 9,400 ug/cu m(indoor air), 36,000 ug/cu m (digester), 4,300 ug/cu m(fresh compost),8,700 ug/cu m(middle age compost), 14,500 ug/cu m(old compost) and 1,400 ug/cu m(curingregion)(8). Methyl ethyl ketone was identified, not quantified, in the emissions of 200 out of1,026 common household products(9). Methyl ethyl ketone was detected in the emissions of aphotocopying machine at rates of less than 100 ug/hr to 380 ug/hr(10). Methyl ethyl ketonewas detected at a concn of 974 ug/cu m in the emissions of active compost at a compostingfacility in Virginia(11).[(1) Brosseau, Heitz M; Atmos Environ 25A: 1473-77 (1994) (2)Jay K, Stieglitz L; Chemosphere 30: 1249-60 (1995) (3) Harley RAet al; Environ Sci Technol 26: 2395-2408 (1992) (4) Wilkins CK,Larsen K; J High Resol Chromatogr 18: 373-77 (1995) (5) WilkinsK, Larsen K; Chemosphere 31: 3225-36 (1995) (6) Wilkins K,Larsen K; Chemosphere 32: 2049-55 (1996) (7) Wilkins K;Chemosphere 29: 47-53 (1994) (8) Eitzer BD; Environ Sci Technol29: 896-902 (1995) (9) Sack TM et al; Atmos Environ 26A: 1063-70(1992)(10) Leovic KW et al; J Air Waste Manage Assoc 46: 821-29(1996) (11) Vandurme GP et al; Water Environ Res 64: 19-27(1992)]**PEER REVIEWED**

Probable Routes of Human Exposure :

NIOSH (NOES Survey 1981-1983) has statistically estimated that 1,221,857 workers (201,308of these are female) are potentially exposed to methyl ethyl ketone in the US(1). Occupationalexposure may be through inhalation and dermal contact with this compound at workplaceswhere methyl ethyl ketone is produced or used(SRC). The 8 hour TWA exposure to methylethyl ketone was 45.4 ppm in a survey of 50 occupationally exposed male subjects working in amagnetic videotape producing factory(2). These workers had average concns of methyl ethylketone of 2 ppm and 1.4 mg/l in breath and blood samples respectively(2). The mean concn ofmethyl ethyl ketone in the breathing zones of 47 US plants using polyurethane coatings was4.33 ppm(3). Methyl ethyl ketone was detected in the breathing zones in 20 of 70 samples(mean concn 12 mg/cu m) obtained from autobody shops and spray paint shops in Australia(4).[(1) NIOSH; National Occupational Exposure Survey (NOES) (1983)(2) Sia Gl et al; Environ Monit Assess 19: 401-11 (1991) (3)





68 Metabolism/Metabolites





73 Disposal Methods

74 Disposal Methods


76 Preventive Measures


78 Sampling Procedures

79 Sampling Procedures

80 RCRA Requirements

81 TSCA Requirements

82 Atmospheric Standards


84Other Chemical/PhysicalProperties


86 Acceptable Daily Intakes


88 Special Reports

89 Interactions

90Other Chemical/PhysicalProperties



93Absorption, Distribution &Excretion


95 Special Reports

96 Plant Concentrations

97EnvironmentalBioconcentration

98 Clinical Laboratory Methods


100EnvironmentalBiodegradation

101 Natural Pollution Sources

102 Mechanism of Action

Myer HE et al; Am Ind Hyg Assoc J 54: 663-70 (1993) (4) WinderC, Turner PJ; Ann Occup Hyg 36: 385-94 (1992)]**PEER REVIEWED**

Environmental Water Concentrations :

GROUNDWATER: Methyl ethyl ketone was detected in groundwater at a coal strip-mine inOhio at a concn of 650 mg/l(1). Methyl ethyl ketone was identified, not quantified, in on-siteand off-site groundwater near a landfill in New Jersey(2). Methyl ethyl ketone was detected inthe groundwater of a coal strip-mine in Lackawanne, PA at a maximum concn of 29,000 ppb(3).Methyl ethyl ketone was detected at an average concn of 12 ug/l in the groundwater of 19 solidwaste disposal facilities in Wisconsin(4) and in the range of 0-91 ug/l in the groundwater of alandfill located in New Castle, DE(5). Methyl ethyl ketone was detected at an average concn of60 ug/l in the groundwater of a chemical manufacturing facility in Alabama(6).[(1) USEPA; Superfund Record of Decision : Summit National Site,Deerfield OH. USEPA/ROD/R85-88/068 (1988) (2) USEPA; SuperfundRecord of Decision: Lipari Landfill Mantau Township, NJ.USEPA/ROD/RO2-88/074 (1988) (3) ATSDR; Health assessment forBeacon Heights Landfill National Priorities List (NPL) Site,Beacon Falls, Connecticut, Region 1. CERCLIS NO. CTD001145671.Agency for Toxic Substances and Disease Registry PB90-135971(1990) (4) Battista JR, Connelly JP; VOC contamination atselected Wisconsin landfills - sampling results and policyimplications. Wisc Dept of Natural Resources, Madison, WI.Publ-SW-094 (1989) (5) ATSDR; Health assessment for TyboutsCorner land (Tybouts) National Priorities List (NPL) site,Wilmington, New Castle County, Deleware, Region 3. CERCLIS NO.DED000606079. Agency for Toxic Substances and Disease RegistryPB90-144387 (1989) (6) USEPA; Superfund Record of Decision:Ciba-Geigy (Mcintosh Plant), AL. USEPA/ROD/R04-89/056(1989)]**PEER REVIEWED**

Environmental Fate :

TERRESTRIAL FATE: Measured Koc values of 29 and 34 were obtained for methyl ethylketone in silt loams(1). Based on a recommended classification scheme(2), methyl ethylketone is expected to have very high mobility in soil(SRC). Volatilization of methyl ethylketone from dry soil surfaces is expected based upon an experimental vapor pressure of 91 mmHg at 25 deg C(3). Volatilization from moist soil surfaces(SRC) is also expected given themeasured Henry's Law constant of 4.7X10-5 atm-cu m/mole(4). The volatilization half-life ofmethyl ethyl ketone from silt and sandy loams was measured as 4.9 days(5). Methyl ethylketone is expected to biodegrade under both aerobic and anaerobic conditions as indicated bynumerous screening tests(6-9).[(1) Walton BT et al; J Environ Qual 21: 552-58 (1992) (2) SwannRL et al; Res Rev 85: 23 (1983) (3) Alarie Y et al; Toxicol ApplPharmacol 134: 92-99 (1995) (4) Bhattacharaya SK et al; WaterRes 30: 3099-3105 (1996) (5) Anderson TA et al; J Environ Qual20: 420-24 (1991) (6) Bridie Al, et al; Water Res 13: 627-30(1979) (7) Price KS et al; J Water Pollut Control Fed 46: 63-77(1974) (8) Bhattacharaya SK et al; Wat Res 30: 3099-3105 (1996)(9) Suflita JM, Mormile MR; Environ Sci Technol 27: 976-78(1993)]**PEER REVIEWED**

Environmental Biodegradation :

Using standard BOD and COD dilution techniques and a sewage inoculum, a theoretical BODof 83% and a theoretical COD of 95% was reported over a 5 day incubation period(1). Thepercent theoretical BOD of methyl ethyl ketone in freshwater was reported as 76%, 82%, 84%and 89% over 5, 10 15 and 20 day incubation periods respectively(2). The percent theoreticalBOD of methyl ethyl ketone in synthetic saltwater was reported as 32%, 62%, 63% and 69%over 5, 10 15 and 20 day incubation periods respectively(2). 92-95% biodegradation wasreported when 0.25 mg/l of methyl ethyl ketone was fed through an activated sludge from awastewater treatment plant over a 3 week incubation period(3). The percent theoretical methane



103 Biological Half-Life



106Hazardous Reactivities &Incompatibilities

107 Cleanup Methods

108 Allowable Tolerances



111 Artificial Pollution Sources

Table of ContentsFULL RECORD

Human Health Effects

Evidence forCarcinogenicity

Human Toxicity Excerpts

Skin, Eye and RespiratoryIrritations

Probable Routes of HumanExposure

Body Burden

Emergency MedicalTreatment


Antidote and EmergencyTreatment

Animal Toxicity Studies


Non-Human ToxicityExcerpts

Non-Human Toxicity Values

Ecotoxicity Values

TSCA Test Submissions

Metabolism/Pharmacokinetics

Metabolism/Metabolites

Absorption, Distribution &Excretion

Biological Half-Life

Mechanism of Action

Interactions

Pharmacology

recovery of methyl ethyl ketone in an anaerobic aquifer was 89% over a 3 week incubationperiod following a 15 day acclimation period(4).[(1) Bridie Al, et al; Water Res 13: 627-30 (1979) (2) Price KSet al; J Water Pollut Control Fed 46: 63-77 (1974) (3)Bhattacharaya SK et al; Wat Res 30: 3099-3105 (1996) (4) SuflitaJM, Mormile MR; Environ Sci Technol 27: 976-78 (1993)]**PEERREVIEWED**

Volatilization from Water/Soil :

The Henry's Law constant for methyl ethyl ketone was measured as 4.7X10-5 atm-cum/mole(SRC) at 25 deg C(1). This value indicates that methyl ethyl ketone will volatilize fromwater surfaces(2,SRC). Based on this Henry's Law constant, the volatilization half-life from amodel river (1 m deep, flowing 1 m/sec, wind velocity of 3 m/sec) is estimated as approximately19 hours(2,SRC). The volatilization half-life from a model lake (1 m deep, flowing 0.05 m/sec,wind velocity of 0.5 m/sec) is estimated as approximately 197 hours(2,SRC). Methyl ethylketone is expected to volatilize from dry soil surfaces given its experimental vapor pressure of91 mm Hg at 25 deg C(3,SRC). The volatilization half-life of methyl ethyl ketone from silt andsandy loams was measured as 4.9 days(4).[(1) Bhattacharaya SK et al; Water Res 30: 3099-3105 (1996) (2)Lyman WJ et al; Handbook of Chemical Property EstimationMethods. Washington DC: Amer Chem Soc pp. 15-1 to 15-29 (1990)(3) Alarie Y et al; Toxicol Appl Pharmacol 134: 92-99 (1995) (4)Anderson TA et al; J Environ Qual 20: 420-24 (1991)]**PEERREVIEWED**


ATMOSPHERIC FATE: According to a model of gas/particle partitioning of semivolatileorganic compounds in the atmosphere(1), methyl ethyl ketone, which has an experimentalvapor pressure of 91 mm Hg at 25 deg C(2), will exist solely as a vapor in the ambientatmosphere. Vapor-phase methyl ethyl ketone is degraded in the atmosphere by reaction withphotochemically-produced hydroxyl radicals(SRC); the half-life for this reaction in air isestimated to be about 14(3,SRC) days. Methyl ethyl ketone is also expected to undergophotodecomposition in the atmosphere by natural sunlight(4,5). Photochemical degradation ofmethyl ethyl ketone by natural sunlight is expected to occur at approximately 1/5 the rate ofdegradation by photochemically produced hydroxyl radicals(5).[(1) Bidleman TF; Environ Sci Technol 22: 361-367 (1988) (2)Alarie Y et al; Toxicol Appl Pharmacol 134: 92-99 (1995) (3)Atkinson R; J Phys Chem Ref Data (1989) (4) Raber W et al; pp.364-70 in Phys Chem Behav Atmos Pollut 5th ed Restelli G,Angeletti G eds, Kluwer: Dordecht, Netherlands (1990) (5)Altshuller AP; J Atmos Chem 13: 155-82 (1991)]**PEER REVIEWED**

Sediment/Soil Concentrations :

Methyl ethyl ketone was detected in the soil of a coal strip mine in Ohio at mean concns of1,682 ug/kg (surface soil), 11,750 ug/kg (2-4 feet), 38,000 ug/kg (4-6 feet), 5,368 ug/kg (6-8feet)(1). Methyl ethyl ketone was identified, not quantified, in the subsurface soil of a gravelmine in Tennessee(2). Methyl ethyl ketone was detected at an average concn of 1,615 ug/kg inthe soil of an unauthorized hazardous waste disposal facility in New Jersey(3). Methyl ethylketone was detected at an average concn of 32 ug/kg in the soil of a waste disposal facility inKansas(4).[(1) USEPA; Superfund Record of Decision: Summit National Site,Deerfield OH. USEPA/ROD/R85-88/068 (1988) (2) USEPA; SuperfundRecord of Decision: Galloway Ponds Site, Galloway, TN.USEPA/ROD/R04-86/013 (1987) (3) USEPA; Superfund Record ofDecision: Lang Property Pemberton Township, NJUSEPA/ROD/R02-86/031 (1987) (4) USEPA; Superfund Record ofDecision: Doepke Disposal (Holliday), KS USEPA/ROD/R07-89/032(1989)]**PEER REVIEWED**



Interactions

Environmental Fate &Exposure

EnvironmentalFate/Exposure Summary


Body Burden

Natural Pollution Sources

Artificial Pollution Sources

Environmental Fate

EnvironmentalBiodegradation

Environmental AbioticDegradation

EnvironmentalBioconcentration

Soil Adsorption/Mobility

Volatilization fromWater/Soil

Environmental WaterConcentrations

Effluent Concentrations

Sediment/SoilConcentrations

AtmosphericConcentrations

Food Survey Values

Plant Concentrations

Milk Concentrations

Environmental Standards &Regulations

FIFRA Requirements

Acceptable Daily Intakes

TSCA Requirements

CERCLA ReportableQuantities

RCRA Requirements

Atmospheric Standards

State Drinking WaterGuidelines

FDA Requirements

Allowable Tolerances

Chemical/Physical Properties

Molecular Formula

Molecular Weight

Color/Form

Food Survey Values :

Methyl ethyl ketone was detected in Swiss cheese (0.3 ppm) and cream (0.154-0.177 ppm)(1).Methyl ethyl ketone was identified, not quantified, in the volatiles of roasted barley, bread,honey, chicken, oranges, black tea, and rum(1), kiwi fruit(2), chickpea seeds(3), mutton,chicken and beef(4). Methyl ethyl ketone was detected at a concn of 1.83 ug/g in rottenmussels in Japan(5).[(1) Lande SS et al; Investigation of Selected PotentialEnvironmental Contaminants: Ketonic Solvents. 331 pp. USEPA560/2-76-003 (1976) (2) Tatsuka K et al; J Food Sci 38: 2176-80(1990) (3) Rembold H et al; J Agric Food Chem 37: 659-62 (1989)(4) Shahidi F et al; CRC Crit Rev Food Sci Nature 24: 141-243(1986) (5) Yasuhara A; J Chromatogr 409: 251-58 (1987)]**PEERREVIEWED**

Effluent Concentrations :

Methyl ethyl ketone was detected in the leachate of several municipal landfills at concnsbetween 110-6,600 ug/l(1). Methyl ethyl ketone was detected in the leachate of a sand andgravel pit near Utica, NY at a concn of 540 ug/l(2). Methyl ethyl ketone was detected in theleachate of an industrial landfill (53 mg/l) and a municipal landfill (0.11-27 mg/l)(3).[(1) Christensen TH et al; Crit Rev Environ Sci Technol 24:119-202 (1994) (2) USEPA; Superfund Record of Decision: LudlowSand and Gravel Site, Town of Paris Oneida County, NYUSEPA/ROD/R02-88/067 (1988) (3) Brown KW, Donnelly KC; Haz WasteHaz Mater 5: 1-30 (1988)]**PEER REVIEWED**


RAIN/SNOW: An unspecified concn of methyl ethyl ketone was detected in the rainfall inJapan(1). Methyl ethyl ketone was detected at concns of 0-0.47 ppb in the clouds in Californiaand as trace amounts in fog-ice(2). Methyl ethyl ketone was detected in clouds (1,390 ng/l) andrainfall (139 ng/l) at a state park in North Carolina(3).[(1) Kato T et al; Yokohama Kokuritsu Daigaku Kankyo KagakuKenkyu Senta Kiyo 6: 11-20 (1980) (2) Grosjean D, Wright B;Atmos Environ 17: 2093-6 (1983) (3) Aneja VP et al; J Air WasteManage Assoc 43: 1239-44 (1993)]**PEER REVIEWED**


SURFACE WATER: Methyl ethyl ketone was identified, not quantified, in the Black River inTuscaloosa, AL(1) and Newark Bay, NJ(2). Methyl ethyl ketone was detected in the PotomacRiver at a concn of less than 40 ug/l(3). Methyl ethyl ketone was detected in a creek in NewCastle, DE near a landfill at concns of 0-11,000 ug/l(4).[(1) Berstch W et al; J Chromatog 112: 701-18 (1975) (2) GunsterDG et al; Environ Pollut 82: 245-53 (1993) (3) Hall LWJR et al;Aquat Toxicol 10: 73-99 (1987) (4) ATSDR; Health assessment forTybouts Corner land (Tybouts) National Priorities List (NPL)site, Wilmington, New Castle County, Deleware, Region 3. Agencyfor Toxic Substances and Disease Registry PB90-144387(1989)]**PEER REVIEWED**


The general population may be exposed to methyl ethyl ketone through the use ofcommercially available products containing this compound such as paints, adhesives, andrubber cements(SRC). Exposure will also arise from inhalation of ambient air, ingestion ofdrinking water and food that contains methyl ethyl ketone(SRC). The average blood concn ofmethyl ethyl ketone in 600 non-occupationally exposed individuals in the US was 7.1 ppb(1).[(1) Ashley DL et al; Clin Chem 40: 1401-04 (1994)]**PEERREVIEWED**

Environmental Abiotic Degradation :



Odor

Taste

Boiling Point

Melting Point

Critical Temperature &Pressure

Density/Specific Gravity

Heat of Combustion

Heat of Vaporization

Octanol/Water PartitionCoefficient

Solubilities

Spectral Properties

Surface Tension

Vapor Density

Vapor Pressure

Relative Evaporation Rate

Viscosity

Other Chemical/PhysicalProperties

Chemical Safety & Handling

DOT Emergency Guidelines

Odor Threshold


Fire Potential

NFPA Hazard Classification

Flammable Limits

Flash Point

Autoignition Temperature

Fire Fighting Procedures

Firefighting Hazards

Explosive Limits &Potential

Hazardous Reactivities &Incompatibilities

Hazardous Decomposition

Immediately Dangerous toLife or Health

Protective Equipment &Clothing

Preventive Measures

Stability/Shelf Life

Shipment Methods andRegulations

Cleanup Methods

Disposal Methods

The rate constant for the vapor-phase reaction of methyl ethyl ketone withphotochemically-produced hydroxyl radicals has been measured as 1.15X10-12 cucm/molecule-sec at 25 deg C(1). This corresponds to an atmospheric half-life of about 14 daysat an atmospheric concn of 5.0X10+5 hydroxyl radicals per cu cm(1,SRC). Methyl ethylketone is also expected to undergo photodecomposition in the atmosphere by naturalsunlight(2,3). Based on the actinic fluxes within the planet boundary layer, along with anestimated quantum yield and absorption cross section, the rate of photodissociation of methylethyl ketone by natural sunlight is approximately 1/5 the rate of dissociation by hydroxylradicals(3). This compound is not expected to undergo hydrolysis in the environment due to alack of functional groups which hydrolyze(SRC).[(1) Atkinson R; J Phys Chem Ref Data (1989) (2) Raber W et al;pp. 364-70 in Phys Chem Behav Atmos Pollut 5th ed Restelli G,Angeletti G eds, Kluwer: Dordecht, Netherlands (1990) (3)Altshuller AP; J Atmos Chem 13: 155-82 (1991)]**PEER REVIEWED**

Interactions :

A study of the potential relationship between methyl ethyl ketone and 2,5-hexanedione wasconducted. Male F344 rats weighing between 200 and 320 g were used. Asensorimotor/behavioral battery consisting of two simple reflex tests, hind limb grasp and hindlimb place, and two complex function tests, balance beam and accelerating rotorod performance,was used for identification and quantification of neurological deficits. ... The enhancement of2,5-hexanedione induced toxicity by methyl ethyl ketone could be correlated with higher tissueexposures of 2,5-hexanedione in animals receiving the combined treatment. ... Methyl ethylketone may compete with 2,5-hexanedione for critical and non-critical binding sites at the targetneurofilament proteins.[Ralston WH et al; Toxicol Appl Pharm 81 (2): 319-27(1985)]**PEER REVIEWED**

TSCA Test Submissions :

The mutagenicity of methyl ethyl ketone was evaluated in Salmonella tester strains TA98,TA100, TA1535, TA1537 and TA1538 (Ames Test), both in the presence and absence of addedmetabolic activation by Aroclor-induced rat liver S9 fraction. Based on the results of thepreliminary bacterial toxicity determinations, methyl ethyl ketone, diluted with DMSO, wastested for mutagenicity at concentrations up to 32 ul/plate (presence metabolic activation) and16 ul/plate (absence metabolic activation) using the preincubation technique. Methyl ethylketone did not cause a reproducible positive response in any of the bacterial tester strains, eitherwith or without metabolic activation.[Microbiological Associates, Inc.;Salmonella/Mammalian-Microsome Preincubation Mutagenicity Assay(Ames Test), (1984), EPA Document No. 40-8444072, Fiche No.OTS0507470] **UNREVIEWED**

Emergency Medical Treatment :

EMT Copyright Disclaimer:Portions of the POISINDEX(R) database are provided here for general reference. THECOMPLETE POISINDEX(R) DATABASE, AVAILABLE FROM MICROMEDEX,SHOULD BE CONSULTED FOR ASSISTANCE IN THE DIAGNOSIS OR TREATMENTOF SPECIFIC CASES. Copyright 1974-1998 Micromedex, Inc. Denver, Colorado. All RightsReserved. Any duplication, replication or redistribution of all or part of the POISINDEX(R)database is a violation of Micromedex' copyrights and is strictly prohibited.

The following Overview, *** KETONES ***, is relevant for this HSDB record chemical.Life Support:

o This overview assumes that basic life support measures have been instituted.

Clinical Effects:



Occupational ExposureStandards

OSHA Standards

Threshold Limit Values

NIOSH Recommendations

Immediately Dangerous toLife or Health

Manufacturing/UseInformation

Major Uses

Manufacturers

Methods of Manufacturing

Formulations/Preparations

Consumption Patterns

U. S. Production

U. S. Imports

U. S. Exports

Laboratory Methods

Clinical LaboratoryMethods

Analytic LaboratoryMethods

Sampling Procedures

Special References

Special Reports

Synonyms and Identifiers

Synonyms


Shipping Name/ NumberDOT/UN/NA/IMO

Standard TransportationNumber

EPA Hazardous WasteNumber

RTECS Number

Administrative Information

Hazardous SubstancesDatabank Number

Last Revision Date

Last Review Date

Update History

Record Length

SUMMARY OF EXPOSURE 0.2.1.1 ACUTE EXPOSURE o ACUTE EXPOSURE (ORAL) - Most available information concerns inhalational or dermal exposure. A few cases involving ingestion of methyl ethyl ketone (and co-ingestants) or ketone peroxide (with co-ingestants) have resulted in CNS depression, respiratory depression or corrosive effects and sequelae. o ACUTE INHALATION - The effects vary, depending on extent and duration of exposure. Eye, nose and throat irritation, nausea, headache, vertigo, incoordination, CNS depression, narcosis and cardiorespiratory failure can occur. In most cases, recovery is usually rapid and complete. o CHRONIC EXPOSURE - The major concern with chronic exposure is axonal neuropathy with secondary myelin damage; usually manifested as paresthesias and muscle weakness. Only six-carbon, linear chain ketones metabolized to gamma-diketones (such as methyl n-butyl ketone) are implicated. o EYE EXPOSURE - Splash contact causes irritation, which may be slight, moderate, or severe, depending on the ketone. Vapors can cause irritation and lacrimation. o ROUTES OF EXPOSURE - Ketones are absorbed by ingestion, inhalation, and dermal exposure. o RELATED COMPOUNDS - Exposure to ketone solvents (methyl ethyl ketone, methyl isobutyl ketone, etc) must be distinguished from exposure to the peroxides of these same ketones. KETONE PEROXIDES are highly reactive and corrosive. Management of ketone peroxide exposure is discussed in a separate document. HEENT 0.2.4.1 ACUTE EXPOSURE o Splash contact causes irritation, which may be slight, moderate, or severe, depending on the specific ketone; vapors may cause irritation and lacrimation. CARDIOVASCULAR 0.2.5.1 ACUTE EXPOSURE o Tachycardia may occur. RESPIRATORY 0.2.6.1 ACUTE EXPOSURE o Ingestion of significant amounts may cause respiratory depression. Inhalation exposure may produce an anesthetic type of respiratory depression, dyspnea, and gasping. Pulmonary aspiration may result in chemical pneumonitis. NEUROLOGIC 0.2.7.1 ACUTE EXPOSURE o Acute inhalation exposure causes a progression of CNS effects, from headache, vertigo, incoordination, narcosis, dizziness, and tremor, to coma. Peripheral neuropathy has been reported following exposure to methyl-n-butyl ketone and 2,5-hexanedione. Trimethylnonanone is not associated with narcosis. o Chronic exposure causes axonal neuropathy with secondary myelin damage, usually manifested as paresthesias and muscle weakness. Only six-carbon, linear chain ketones metabolized to gamma-diketones



(such as methyl n-butyl ketone) are implicated. GASTROINTESTINAL 0.2.8.1 ACUTE EXPOSURE o Nausea and vomiting may occur. HEPATIC 0.2.9.1 ACUTE EXPOSURE o Ketones may potentiate the hepatotoxicity of halogenated hydrocarbons. They may also inhibit aromatic hydrocarbon metabolism. ACID-BASE 0.2.11.1 ACUTE EXPOSURE o Metabolic acidosis has been reported. DERMATOLOGIC 0.2.14.1 ACUTE EXPOSURE o Skin exposure to the liquid or vapor may result in dermatitis and paresthesias of affected areas. Contact urticaria has also been reported. REPRODUCTIVE HAZARDS o Limited studies have generally documented little or no effect of ketones on reproduction in experimental animals. Human data is lacking. 2,5-Hexanedione has an effect on spermatogenesis in male experimental animals. CARCINOGENICITY 0.2.21.1 IARC CATEGORY o The ketones are generally unclassified by IARC. Those agents evaluated by IARC have been classified as having insufficient evidence to determine human carcinogenicity. 0.2.21.2 HUMAN OVERVIEW o No adequate human studies exist for the agents in this category. 0.2.21.3 ANIMAL OVERVIEW o Experimental animal studies are limited, but are generally negative, and agents in this group have little mutagenic activity. GENOTOXICITY o Extremely limited data is available for this class of agents. For many specific ketones, no data is available. Some studies report positive findings, but this category of agents appears to be generally non-mutagenic or only weakly mutagenic.

Laboratory:

o Plasma ketone levels are not clinically useful. o If pulmonary aspiration is suspected, monitor chest x-ray and arterial blood gases or pulse oximetry.

Treatment Overview:



ORAL EXPOSURE o With ingestion of small amounts the major concern is pulmonary aspiration and gastrointestinal decontamination is not recommended. With ingestion of large amounts there is potential for systemic toxicity from gastrointestinal absorption and GI decontamination is suggested, keeping in mind that pulmonary aspiration is still a concern. o If the patient is obtunded, seizing, or has significant alterations in mental status, a cuffed endotracheal tube should be inserted prior to gastric aspiration. 1. For moderate ingestions (less than 100 milliliters) activated charcoal alone is recommended. 2. For large ingestions that have occurred within the past hour, careful gastric aspiration followed by activated charcoal is recommended. a. The lavage tube should be flexible, well lubricated with a water soluble gel to minimize gagging and vomiting, and of a large enough diameter to minimize vomiting of gastric contents around the tube and potential pulmonary aspiration. b. After the tube is in place, evacuate gastric contents rapidly. Repeated instillation of fluid to wash out the stomach is NOT suggested as it probably does not significantly enhance the removal of liquids and may enhance the potential for pulmonary aspiration. c. Instill activated charcoal prior to withdrawing the tube. d. For ingestions that have occurred more than 2 hours ago, gastric decontamination is not likely to be of benefit and is generally not warranted. o Administer activated charcoal for moderate or large ingestions. 1. ACTIVATED CHARCOAL: Administer charcoal as slurry (240 mL water/30 g charcoal). Usual dose: 25 to 100 g in adults/adolescents, 25 to 50 g in children (1 to 12 years), and 1 g/kg in infants less than 1 year old. o ACIDOSIS - Correct severe acidosis (pH < 7.1) with intravenous sodium bicarbonate. About 1 to 2 milliequivalents/kilogram is a useful starting dose. Monitor arterial blood gases to guide bicarbonate therapy. INHALATION EXPOSURE o DECONTAMINATION: Move patient to fresh air. Monitor for respiratory distress. If cough or difficulty in breathing develops, evaluate for respiratory tract irritation, bronchitis, or pneumonitis. Administer 100 percent humidified supplemental oxygen with assisted ventilation as required. EYE EXPOSURE o DECONTAMINATION: Exposed eyes should be irrigated with copious amounts of tepid water for at least 15 minutes. If irritation, pain, swelling, lacrimation, or photophobia persist, the patient should be seen in a health care facility. DERMAL EXPOSURE o DECONTAMINATION: Wash exposed area extremely thoroughly with soap and water. A physician may need to examine



the area if irritation or pain persists. o Treat dermal irritation or burns with standard topical therapy. Patients developing dermal hypersensitivity reactions may require treatment with systemic or topical corticosteroids or antihistamines.

Range of Toxicity:

o The minimal toxic or lethal dose is variable and not well defined. Toxic effects following inhalation exposure depend on air concentration, time of exposure and underlying diseases. o Exposure to airborne concentrations greater than 300 ppm of methyl ethyl ketone may result in discomfort and CNS depression. Methyl-isobutyl ketone produces irritation at an airborne concentration of 100 ppm (Hjelm et al, 1990).

[Rumack BH: POISINDEX(R) Information System. Micromedex, Inc.,Englewood, CO, 2001; CCIS Volume 107, edition exp February,2001. Hall AH & Rumack BH (Eds):TOMES(R) Information System.Micromedex, Inc., Englewood, CO, 2001; CCIS Volume 107, editionexp February, 2001.] **PEER REVIEWED**

Interactions :

... An important observation was the marked potentiation of peripheral neurotoxicity observedwhen animals were exposed to n-butyl ketone in combination with methyl ethyl ketone at aratio of 1:5, n-butyl ketone: methyl ethyl ketone. The latter solvent showed no neurotoxiceffect alone.[Saida K et al; J Neuropathol Exp Neurol 35 (3): 207-25(1976)]**PEER REVIEWED**


RURAL/REMOTE: Methyl ethyl ketone was detected at an average concn of 2.40 ng/l in theair of a state park in North Carolina(1). Methyl ethyl ketone was detected at an average concnof 18 ug/cu m at rural locations in Canada(2) and concns of 1.8-3.3 ppb in a rural location inLouisiana(3).[(1) Aneja VP et al; J Air Waste Manage Assoc 43: 1239-44 (1993)(2) Chan CC et al; J Air Waste Manage Assoc 40: 62-67 (1990) (3)Khalil MAK, Rasmussen RA; J Air Waste Manage Assoc 42: 810-13(1992)]**PEER REVIEWED**


SOURCE AREAS: Methyl ethyl ketone was detected at a median concn of 64 parts per trillionand a range of 10-1,900 parts per trillion(1) in source dominated areas in New Jersey(1). Methylethyl ketone was detected at a concn of 94 ppm near a reclamation plant(2).[(1) Brodzinsky R, Singh HB; Volatile Organic Chemicals in theAtmos SRI International Contract 68-02-3452 (1982) (2) Lande SSet al; Investigation of Selected Potential EnvironmentalContaminants: Ketonic Solvents 331 p USEPA 560/2-76-003(1976)]**PEER REVIEWED**

Soil Adsorption/Mobility :

Measured Koc values of 29 and 34 were obtained for methyl ethyl ketone in silt loams(1).Based on a recommended classification scheme(2), methyl ethyl ketone is expected to havevery high mobility in soil(SRC).[(1) Walton BT et al; J Environ Qual 21: 552-58 (1992) (2) SwannRL et al; Res Rev 85: 23 (1983)]**PEER REVIEWED**




INDOOR AIR: Methyl ethyl ketone was detected at an average concn of 17.8 ug/cu m atdwellings in Canada(1) and 2.4 ppb in buildings in Boston, MA(2). Methyl ethyl ketone wasdetected in 2 federal office buildings in Portland, OR at concns between 2.0 and 40.9 ug/cum(3). Four indoor air samples in the US had average concns of MEK of 9.238 ppb(4).[(1) Chan CC et al; J Air Waste Manage Assoc 40: 62-67 (1990)(2) Reiss R et al; J Air Waste Manage Assoc 45: 811-22 (1995)(3) Hodgeson AT et al; J Air Waste Manage Assoc 41: 1461-68(1991) (4) Shah JJ, Heyerdahl EK; Environ Sci Technol 22:1381-88 (1988)]**PEER REVIEWED**

Plant Concentrations :

Methyl ethyl ketone is emitted from pencil cedar, Zeravshan juniper, European firs andEvergreen cyprus(1). Methyl ethyl ketone was detected in 32 of 32 samples of southern peaseeds at a mean concn of 151 ppb(2).[(1) Singh HB, Zimmerman PB; Adv Environ Sci Technol 24: 177-235(1992) (2) Fisher GS et al; J Agric Food Chem 27: 7-11(1979)]**PEER REVIEWED**


AQUATIC FATE: Based on experimental Koc values of 29 and 34 obtained in silt loams(1),and a recommended classification scheme(2), methyl ethyl ketone is not expected to adsorb tosuspended solids and sediment in water(SRC). Methyl ethyl ketone is expected to volatilizefrom water surfaces(3,SRC) based on the measured Henry's Law constant of 4.7X10-5 atm-cum/mole(4). Estimated half-lives for a model river and model lake are 19 and 197, hoursrespectively(3,SRC). Biodegradation of this compound is expected based upon numerousscreening tests(5-8). According to a classification scheme(9), an estimated BCF value of1(3,SRC), from an experimental log Kow of 0.29(10,SRC), suggests that bioconcentration inaquatic organisms is low(SRC).[(1) Walton BT et al; J Environ Qual 21: 552-58 (1992) (2) SwannRL et al; Res Rev 85: 23 (1983) (3) Lyman WJ et al; Handbook ofChemical Property Estimation Methods. Washington DC: Amer ChemSoc pp. 4-9 (1990) (4) Bhattacharaya SK et al; Water Res 30:3099-3105 (1996) (5) Bridie Al, et al; Water Res 13: 627-30(1979) (6) Price KS et al; J Water Pollut Control Fed 46: 63-77(1974) (7) Bhattacharaya SK et al; Wat Res 30: 3099-3105 (1996)(8) Suflita JM, Mormile MR; Environ Sci Technol 27: 976-78(1993) (9) Franke C et al; Chemosphere 29: 1501-14 (1994) (10)Hansch C et al; Exploring QSAR Hydrophobic, Electronic andStearic Constants Washington,DC: Amer Chem Soc (1995)]**PEERREVIEWED**


DRINKING WATER: A Federal survey of public groundwater supplies detected methyl ethylketone in less than 5% of the samples(1). Methyl ethyl ketone was identified, not quantified, indrinking water supplies from 7 cities from varied sources and with different types of pollutantsources(2-4).[(1) Dyksen JE, Hess AF III; J Amer Water Works Assoc 74:394-403 (1982) (2) Coleman WE et al; pp. 305-207 in Analysis andIdentification of Organic Substances in Water. Keith L ed AnnArbor, MI Ann Arbor Press (1976) (3) Scheeman MA et al; BiomedMass Spectrom 4: 209-11 (1974) (4) USEPA; New Orleans Area WaterSupply Study. Draft Analytical Report by the Lower MississippiRiver Facility, Slidell (1974)]**PEER REVIEWED**

Milk Concentrations :

Methyl ethyl ketone was identified, not quantified in human milk samples in Bayonne, NJ(1)Pittsburgh, PA(1) Baton Rouge, LA(1) and Australia(2). Methyl ethyl ketone was identified,not quantified in 5 of 8 samples of human milk from 4 US urban areas(3).



[(1) Erickson MD et al; Acquisition and chemical analysis ofmother's milk for selected toxic substances.USEPA-560/13-80-029. Washington, DC: USEPA Off Pestic ToxicSubstances (1980) (2) Urbach G; J Chromatogr 404: 163-74 (1987)(3) Pellizzari ED et al; Bull Environ Contam Toxicol 28: 322-8(1982)]**PEER REVIEWED**

Interactions :

Methyl ethyl ketone potentiates carbon tetrachloride hepatoxicity in rats. Oral dosing withmethyl ethyl ketone at 1.87, 2.4, or 1.2 ml/kg followed by ip injection with carbon tetrachlorideat 0.1 ml/kg significantly enhanced the hepatotoxicity of carbon tetrachloride as measured byincreased serum glutamic pyruvic transaminase activity and hepatic triglyceride concentrationand decreased hepatic glucose-6-phosphatase activity.[Traiger GJ, Bruckner JV; J Pharmacol Exp Ther 196: 493(1976)]**PEER REVIEWED**

Absorption, Distribution & Excretion :

Measurable (2.54 to 13 ug/l) quantities of methyl ethyl ketone appeared in expired air of adulthumans 3 min following dermal exposure to 100 ml methyl ethyl ketone applied to 91.5 sq cmof skin.[Wurster; J Pharm Sci 54: 554 (1965)]**PEER REVIEWED**


The effects of methyl ethyl ketone were examined in the rat hepatocyte primary culture/DNArepair assay. Based on preliminary toxicity tests, methyl ethyl ketone was tested atconcentrations of 5.0 (relative toxicity 74.67%), 2.5, 1.0, 0.5, 0.1 or 0.01 ul/ml (relative toxicity6.67%). None of the tested concentrations caused a significant increase in unscheduled DNAsynthesis over the solvent control (DMSO).[Microbiological Associates Inc.; Unscheduled DNA Synthesis inRat Primary Hepatocytes, Final Report, (1984), EPA Document No.40-8444072, Fiche No. OTS0507470] **UNREVIEWED**


Methyl ethyl ketone was evaluated for the ability to increase the incidence of micronucleatedpolychromatic erythrocytes in bone marrow of male and female CD-1 mice treated by single i.p.injection (Micronucleus Test). Groups of 10 mice (5 male, 5 female) were sacrificed 12, 24 and48 hours following injection of methyl ethyl ketone in corn oil at a dose of 1.96 ml/kg bodyweight (calculated LD20 dose). The ratio of normochromatic to polychromatic erythrocyteswere not significantly different (p > 0.05, ANOVA) in the treated groups compared with vehiclecontrols, regardless of sacrifice time. The incidence of micronucleated polychromaticerythrocytes was increased above the vehicle control 24 hours after administration, but was notconsidered statistically significant when compared to all treatment and vehicle control groupsregardless of sacrifice time (p > 0.05, ANOVA).[Microbiological Associates Inc.; Activity of Methyl EthylKetone in the Micronucleus Cytogenetic Assay in Mice, FinalReport, (1984), EPA Document No. 40-8444072, Fiche No.OTS0507470] **UNREVIEWED**

Interactions :

... The toxic neuropathy induced by methyl ethyl ketone is clinically and morphologicallyidentical with that induced by n-hexane and methyl butyl ketone. Methyl ethyl ketone can actsynergistically with n-hexane to produce toxic neuropathy.[Alterkirch H et al; J Neurology 214: 137-52 (1977)]**PEERREVIEWED**


The ability of methyl ethyl ketone to induce morphological transformation in the BALB/3T3mouse cell line (Cell Transformation Assay) was evaluated both in the presence and absence of



added metabolic activation by Aroclor-induced rat liver S9 fraction. Based on preliminaryclonal toxicity determinations (exposure time=2 hrs), methyl ethyl ketone, diluted withphosphate buffered saline, was tested at 18, 13 and 9ul/ml in the absence of metabolicactivation, with cell survival ranging from 93.3% to 51.1% relative to the solvent control.Assays with metabolic activation were tested at 10, 8 and 6ul/ml (exposure time=2 hrs), withcell survival ranging from 85.7% to 67.3%. None of the tested concentrations producedsignificantly greater transformation frequencies (p > 0.05, Modified Poisson Distribution)relative to the solvent control.[Microbiological Associates Inc.; Activity of Methyl EthylKetone in the Morphological Transformation Assay using BALB/3T3Mouse Embryo Cells, Final Report, (1984), EPA Document No.40-8444072, EPA Fiche No. OTS0507470] **UNREVIEWED**

Non-Human Toxicity Excerpts :

Groups of Sprague-Dawley rats were exposed, by inhalation to ... methyl ethyl ketone (800ppm, 2345 mg/cu m) ... for 4 weeks. Increased liver weights and liver-to-body weight ratioswere observed. Methyl ethyl ketone depressed the formation of 2 metabolites ofandrostenedione but did not alter the concentration of cytochrome p450 in companion in vitromicrosomal metabolism studies.[Toftgard R et al; Scand J Work Environ Health 7 (1): 31-7(1981)]**PEER REVIEWED**

Special Reports :

Yang RS H; Residue Rev 97: 121-43 (1986). The toxicology of methyl ethyl ketone. A reviewwith many references on the manufacture, uses, and toxicity of methyl ethyl ketone.


The presence of solvents such as toluene, xylene, methyl ethyl ketone, and other similarproducts in the indoor air of an automobile body repair shop, an offset printing facility and theadjacent dwellings was monitored, and the individual exposure of the corresponding workersand residents was tested by biological monitoring of exhaled breath and by personal airsampling. The concentrations of solvents tested in the air of both sites surveyed were lower thanprevailing Dutch Maximum Allowable Concentration levels. The levels of solvents recorded inthe air of apartments situated on top of the facilities surveyed were significantly higher than thelevels recorded in the surrounding dwellings. The levels of methyl ethyl ketone, toluene andxylene in personal air samples of employees at the body shop were 1.5 times higher than inambient air. The level of toluene in alveolar air of residents living above the automobile repairshop was 50 percent higher than that recorded in spot samples. The levels of other solvents wereequal to or lower than the detection level. At the offset printing facility, toluene, xylene,butylacetate, 2-ethoxyethanol and cyclohexanone in air and in personal air samples followed thesame general pattern identified for the body shop. In a dwelling next to the shop and in anapartment on top of the shop, the concentrations ranged from 3 to 9 percent and 14 to 19percent, respectively, of the levels recorded inside the facility itself.[Verhoeff AP et al; Int Arch Occup Environ Health 59 (2): 153-63(1987)]**PEER REVIEWED**

Clinical Laboratory Methods :

Methyl ethyl ketone in biofluid samples is analyzed using headspace chromatography with aflame ionization detector. The relative retention time is 0.816 min (relative to n-propanol 1.50min).[Sunshine, Irving (ed.) Methodology for Analytical Toxicology.Cleveland: CRC Press, Inc., 1975.,p. VII/7]**PEER REVIEWED**


Male and female Fischer 344 rats were exposed to 0, 1250, 2500, or 5000 ppm methyl ethylketone (MEK) vapors 6 hr/day, 5 day/wk for 90 days. The 90 day exposures had no adverseeffect on the clinical health or growth of male or female rats except for a depression of meanbody wt in the 5000 ppm exposure group. The 5000 ppm animals had a slight but significant



increase in liver weight, liver weight/body weight ratio, and liver weight/brain weight ratio atnecropsy. Serum glutamic-pyruvic transaminase (SGPT) activity in the 2500 ppm female ratswas elevated while the 5000 ppm female rats exhibited significantly decreased serumglutamic-pyruvic transaminase SGPT activity. In addition, alkaline phosphatase, potassium, andblood glucose values for the 5000 ppm female rats were increased. ...[Cavender FL et al; Fundam Appl Toxicol 3: 264-70 (1983)]**PEERREVIEWED**

Consumption Patterns :

CHEMICAL PROFILE: Methyl Ethyl Ketone. Coatings solvent, 50%; adhesives, 13%;magnetic tapes, 8%; lube oil dewaxing, 4%; printing inks, 3%; miscellaneous, 6%; exports,16%.[Kavaler AR; Chemical Marketing Reporter 232 (8): 50(1987)]**PEER REVIEWED**

Consumption Patterns :

CHEMICAL PROFILE: Methyl ethyl ketone. Demand: 1986: 582 million lb; 1987: 600million lb; 1991 /projected/: 600 million lb (Includes exports; in addition, 52 million lb wereimported in 1986).[Kavaler AR; Chemical Marketing Reporter 232 (8): 50(1987)]**PEER REVIEWED**


Chinese hamsters were exposed to ... methyl ethyl ketone ... known to be a strong inducer ofaneuploidy in the yeast Saccharomyces cerevisiae. ... Solvent yielded negative results in themicro-nucleus test.[Basler A; Mutat Res 174 (1): 11-13 (1986)]**PEER REVIEWED**

Analytic Laboratory Methods :

EPA Method 1624 - Volatile Organic Compounds By GC/MS: Grab samples in municipal andindustrial discharges are collected. If residual chlorine is present, add sodium thiosulfate.Extraction is performed by a purge and trap apparatus. An isotope dilution gaschromatography/mass spectrometry method for the determination of volatile organiccompounds in municipal and industrial discharges is described. Unlabeled methyl ethyl ketonehas a minimum level of 50 ug/l and a mean retention time of 848 sec.[40 CFR 136 (7/1/88)]**PEER REVIEWED**


ANALYTE: METHYL ETHYL KETONE; MATRIX: AIR; RANGE: 0.01 MG/SAMPLE;PROCEDURE: ADSORPTION ON CHARCOAL DESORPTION WITH CARBONDISULFIDE, GC; PRECISION: NOT GIVEN.[U.S. Department of Health and Human Services, Public HealthService. Centers for Disease Control, National Institute forOccupational Safety and Health. NIOSHManual of AnalyticalMethods, 3rd ed. Volumes 1 and 2 with 1985 supplement, andrevisions. Washington, DC: U.S. Government Printing Office,February 1984.,p. V1 2500-2]**PEER REVIEWED**

FDA Requirements :

Methyl ethyl ketone is a food additive permitted for direct addition to food for humanconsumption as a synthetic flavoring substance and adjuvant in accordance with the followingconditions: 1) the quantity added to food does not exceed the amount reasonably required toaccomplish its intended physical, nutritive, or other technical effect in food, and 2) whenintended for use in or on food it is of appropriate food grade and is prepared and handled as afood ingredient.[21 CFR 172.515 (4/1/96)]**PEER REVIEWED**

FDA Requirements :



Methyl ethyl ketone is an indirect food additive polymer for use as a basic component of singleand repeated use food contact surfaces. Residue limit 0.1% by weight of finished packagingcellophane.[21 CFR 177.1200 (4/1/96)]**PEER REVIEWED**

FDA Requirements :

Methyl ethyl ketone is an indirect food additive for use only as a component of adhesives.[21 CFR 175.105 (4/1/96)]**PEER REVIEWED**

FIFRA Requirements :

Methyl ethyl ketone is exempted from the requirement of a tolerance when used as a solvent,cosolvent in accordance with good agricultural practice as inert (or occasionally active)ingredients in pesticide formulations applied to growing crops only.[40 CFR 180.1001(d) (7/1/96)]**PEER REVIEWED**

U. S. Production :

The demand for methyl ethyl ketone was 3.0X10+11 g in 1978, 3.7X10+11 g in 1979 andprojected to be 3.6X10+11 g in 1983 (production plus imports)[Kavaler. Chem Market Reporter 1980]**PEER REVIEWED**


METHYL ETHYL KETONE WAS EVALUATED FOR EFFECTS ON A DELAYEDMATCH TO SAMPLE DISCRIMINATION TASK IN THE JUVENILE BABOONS. THEANIMALS WERE EXPOSED TO HALF THE THRESHOLD LIMIT VALUE (245 MG/CUM) FOR 24 HR PER DAY DURING A 7 DAY PERIOD. EACH EXPOSURE CONDITIONAFFECTED ACCURACY OF PERFORMANCE MINIMALLY BUT RESULTED ININCREASED AND DECREASED EXTRA RESPONSES DURING THE DELAYINTERVALS.[GELLER I; PHARMACOL BIOCHEM BEHAV 11 (4): 401-6 (1979)]**PEERREVIEWED**


Incubation of Ehrlich-Landschutz diploid ascites tumor cells in media containing 50 and 100ppm methyl ethyl ketone resulted in the destruction of 10.5 and 14.0% of the cells. Controlincubations lost only 4.2% of cells in the 5 hr period.[Holmberg; Environ Res 7: 183 (1974)]**PEER REVIEWED**

Atmospheric Standards :

This action promulgates standards of performance for equipment leaks of Volatile OrganicCompounds (VOC) in the Synthetic Organic Chemical Manufacturing Industry (SOCMI). Theintended effect of these standards is to require all newly constructed, modified, andreconstructed SOCMI process units to use the best demonstrated system of continuous emissionreduction for equipment leaks of VOC, considering costs, non air quality health andenvironmental impact and energy requirements. Methyl ethyl ketone is produced, as anintermediate or final product, by process units covered under this subpart.[40 CFR 60.489 (7/1/87)]**PEER REVIEWED**

Threshold Limit Values :

BEI (Biological Exposure Index): Methyl ethyl ketone in urine at end of shift is 2 mg/l. (1988adoption)[American Conference of Governmental Industrial Hygienists.Threshold Limit Values (TLVs) for Chemical Substances andPhysical Agents Biological Exposure Indices for 1998.Cincinnati, OH: ACGIH, 1998. 102]**QC REVIEWED**


METHYL ETHYL KETONE DELAYED MATCH-TO-SAMPLE DISCRIMINATION



TASK IN THE JUVENILE BABOON & ALSO SLOWED RESPONSE TIMES & INCREXTRA RESPONSES.[GELLER I; NEUROBEHAV TOXICOL 1 (SUPPL 1): 9 (1979)]**PEERREVIEWED**


The effects of the solvents n-hexane, butanone (methyl ethyl ketone, MEK) and a mixture ofboth in the intrapulmonary nerve system of rats were studied by light and electron microscopy.The alteration in the fine structures of the tissues consisted in a disseminated swelling of axonsdue to a striking multiplication of neurofilaments. Nonspecific axonal alterations could bedemonstrated as well. The latter consisted in clusters of phospholipid material within theaxoplasm of nerve fibers and the cytoplasm of Schwann cells plus an accumulation of glycogengranules in the axoplasm. Additionally, single degenerative changes of Schwann cells wereobserved.[Schmidt R; Respiration 46 (4): 62-9 (1984)]**PEER REVIEWED**

Body Burden :

Worker exposures were investigated in April 1983 at the Hoover Company, North Canton,Ohio. ... Area and personal air samples for numerous contaminants were collected andnonionizing radiation levels were measured. ... General medical questionnaires and blood testsfor methyl ethyl ketone (MEK) were given to exposed workers. ... No respiratory symptoms orpulmonary function disorders were identified in the foundry workers, and MEK was detected inthe blood of only one worker at 1.4 ug/ml. ...[NIOSH; Health Hazard Evaluation Report No. HETA-82-280-1407(1984)]**PEER REVIEWED**

Body Burden :

The kinetics of inhaled methyl ethyl ketone (MEK) in human volunteers was studied in anexposure chamber. Relative pulmonary uptake was about 53% throughout a 4 hr exposureperiod at 200 ppm. Blood MEK concentration rose steadily until the end of exposure. Repeatedbicycle exercise increased the overall blood MEK level markedly in comparison to sedentaryactivity, with transient peaks in association with cycling; thus blood MEK concentrationdepended both on the rate of uptake and the amount taken up. Only 3% of the absorbed dosewas excreted unchanged by exhalation. A well known metabolite of MEK, 2,3-butanediol, wasdetected in the urine with maximum rates of excretion at about 6 to 12 hr from the beginning ofexposure. About 2% of the MEK dose taken up by the lungs was excreted in the urine as2,3-butanediol. ... Elimination of MEK in blood appeared to exhibit two phases: the initialalpha-phase (T1/2= 30 min; kel alpha= 0.023) over the first post-exposure hour, followed by theterminal beta-phase (T1/2= 81 min; kel beta= 0.009).[Liira J et al; Int Arch Occup Environ Health 60 (3): 195-200(1988)]**PEER REVIEWED**


EXPOSURE TO 1500 PPM OF METHYL ETHYL KETONE (MEK) ALONE FOR 7-9 WKDID NOT CAUSE PARALYSIS BUT DID ELEVATE PLASMA CHOLINESTERASELEVELS IN MICE, RATS, & CHICKENS.[COURI D ET AL; PROC ANNU CONF ENVIRON TOXICOL, 5TH,AMRL-TR-74-125: 109 (1974)]**PEER REVIEWED**

Human Toxicity Excerpts :

A case of contact urticaria (CU) caused by methyl ethyl ketone (MEK) was reported. ... Acotton swab test with MEK to the normal skin on his forearm caused the skin to turn bright red.The spot was itchy, but no induration or edema was noticed. The reaction reached its maximumafter 15 minutes and then gradually faded. The test was repeated after two days with the sameresults. Application of the same grade MEK to five medical staff members produced noreaction. ... MEK should be added to the list of agents that are not only irritants, but can alsocause contact urticaria.[Varigos GA, Nurse DS; Contact Dermatitis 15 (4): 259-60



(1986)]**PEER REVIEWED**


Toxic effects of common organic solvents on workers /were/ examined. The most notable acuteeffects of occupational exposure to organic solvents are /CNS depression/ and other nervedysfunctions. The common symptoms of short term exposure are fatigue, headache, nausea,sleep disturbance, and alteration in memory. Psychomotor performance of adverse effects onintellectual or memory functions are demonstrated with psychological test batteries afterlong-term occupational exposure to organic solvents. The mutagenic, carcinogenic, andtoxicological effects of ... methyl ethyl ketone ... are summarized. ... In clinical observations,the effects of organic solvents can cause increased excretion of abnormal cells and protein inurine. This indicates the possible correlation between long-term exposure and renal disease.[Bang KM; Health Hazards in the Occupational Environment 7 (3):15-29 (1984)]**PEER REVIEWED**

Interactions :

IT DOES NOT APPEAR TO BE NEUROTOXIC BY ITSELF, IT POTENTIATESNEUROTOXICITY OF OTHER HEXACARBONS; REPORTED IN HUMANS EXPOSEDTO METHYL ETHYL KETONE (MEK) & N-HEXANE.[ALTENKIRCH ET AL; J NEUROL 214: 152 (1977)]**PEER REVIEWED**


METHYL ETHYL KETONE IS IMPLICATED AS THE CAUSE OF RETROBULBARNEURITIS IN PT WHO USED THE SOLVENT IN REMOVING PAINT FROM ANAIRPLANE HANGAR.[BERG EF; ANN OPHTHALMOL 3 (12): 1351 (1971)]**PEER REVIEWED**


Exposure of the forearm for 1 hr/day for 6 consecutive days produced damage to the horny layerof the epithelium. ... Methyl ethyl ketone can defat and partially dehydrate the stratum corneumof human skin without producing irritation or inflammation.[Clayton, G.D., F.E. Clayton (eds.) Patty's Industrial Hygieneand Toxicology. Volumes 2A, 2B, 2C, 2D, 2E, 2F: Toxicology. 4thed. New York, NY: John Wiley & Sons Inc., 1993-1994. 1767]**PEERREVIEWED**

Metabolism/Metabolites :

Milk cultures of five Leuconostoc dextranicum strains were capable of reducing methyl ethylketone (MEK) to 2-butyl alcohol.[Keenan TW; Appl Microbiol 16: 1881-5 (1968)]**PEER REVIEWED**


Uptake of oxygen by Mycobacterium smegmatis 442, and Corynebacterium sp duringmetabolism of 1 ul of methyl ethyl ketone (MEK) in Warburg respirometers, was 196 and 266ul of oxygen respectively.[Lukins HB, Foster JW; J Bacteriol 85: 1076-87 (1963)]**PEERREVIEWED**


GUINEA PIGS WERE GIVEN SINGLE 450 MG/KG IP DOSES OF METHYL ETHYLKETONE (MEK). MEK PRODUCED 2-BUTANOL, 3-HYDROXY-2-BUTANONE, &2,3-BUTANEDIOL.[DIVINCENZO GD ET AL; TOXICOL APPL PHARMACOL 36 (3): 511(1976)]**PEER REVIEWED**


HIGH ATM CONCN OF METHYL ETHYL KETONE IS IRRITATING TO THE EYES,



NOSE, AND THROAT AND PROLONGED EXPOSURE MAY PRODUCE CNSDEPRESSION ... NO UNTOWARD EFFECTS HAVE BEEN REPORTED FOR CHRONICEXPOSURE TO LOW CONCN. PROLONGED SKIN CONTACT MAY DEFAT THE SKINAND PRODUCE DERMATITIS. IF SPLASHED IN THE EYES IT MAY PRODUCEPAINFUL IRRITATION AND CORNEAL INJURY.[Clayton, G.D., F.E. Clayton (eds.) Patty's Industrial Hygieneand Toxicology. Volumes 2A, 2B, 2C, 2D, 2E, 2F: Toxicology. 4thed. New York, NY: John Wiley & Sons Inc., 1993-1994. 1748]**PEERREVIEWED**


METHYL ETHYL KETONE (MEK) OCCURS ... IN NORMAL HUMAN URINE & ... HASPOSSIBLE DIETARY ORIGIN; ITS MORE PROBABLE PRECURSOR ISALPHA-METHYLACETOACETIC ACID. LIKE OTHER KETONES ... MEK IS REDUCED... IN THE BODY. ONLY 30-40% ... IS ELIMINATED IN EXPIRED AIR ... .[Browning, E. Toxicity and Metabolism of Industrial Solvents.New York: American Elsevier, 1965. 422]**PEER REVIEWED**

Disposal Methods :

Methyl ethyl ketone is a waste chemical stream constituent which may be subjected to ultimatedisposal by controlled incineration.[USEPA; Engineering Handbook for Hazardous Waste Incinerationp.2-8 (1981) EPA 68-03-3025]**PEER REVIEWED**

Disposal Methods :

The following wastewater treatment technologies have been investigated for methyl ethylketone: solvent extraction and activated carbon.[USEPA; Management of Hazardous Waste Leachate, EPA ContractNo.68-03-2766 p.E-16 (1982)]**PEER REVIEWED**


An inhalation teratology study was conducted with pregnant Sprague-Dawley rats (25/group)receiving whole body exposure to methyl ethyl ketone in a dynamic air flow chamber, 7hours/day on days 6 through 15 of gestation. There was no effect of treatment for all animals asindicated by clinical observations, absolute or relative liver weights, food consumption, numberof pregnancies, and mortality. Maternal toxicity was evident by statistical differences betweenhigh dose groups and controls for: maternal body weights, maternal body weight gain and waterconsumption. The average number of live fetuses per litter, incidence of resorption rates, fetalbody weight or crown-rump length were not significantly affected by treatment. Significantdifferences were observed between the fetuses of the control and high dose group for skeletalvariations, but no significant external or soft-tissue alterations were observed in any of thefetuses of treated females.[Dow Toxicology Research Laboratory; Teratologic Evaluation ofInhaled Methyl Ethyl Ketone in Rats, (1979), EPA Document No.878210652, Fiche No. OTS0206178] **UNREVIEWED**

Preventive Measures :

A major concern in the painting studio is solvents, /including methyl ethyl ketone/. ...Precautions include ... use of dilution and local exhaust ventilation, control of storage areas,disposal of solvent soaked rags in covered containers, minimizing skin exposure and the use ofrespirators and other personal protective equipment. The control of fire hazards is alsoimportant, since many of the solvents are highly flammable.[Hart C; J Environ Health 49 (5): 282-6 (1987)]**PEER REVIEWED**


METHOD IS BASED ON COLOR REACTION OF METHYL ETHYL KETONE WITHVANILLIN IN CONCN SULFURIC ACID.[TYRAS H ET AL; CHEM ANAL (WARSAW) 21 (3): 647 (1976)]**PEER



REVIEWED**

Sampling Procedures :

Activated charcoal, Ambersorb XE-348, and Amberlites XAD-2, XAD-4, and XAD-7 wereevaluated as solid adsorbents for work-room air sampling of acetone, methyl ethyl ketone,methyl isobutyl ketone, methyl n-butyl ketone, cyclohexanone and isophorone. Activatedcharcoal had good capacity for the compounds investigated, but most ketones decomposed onthis adsorbent during storage. Ambersorb XE-348 also showed good capacity for most of theketones and decomposition was insignificant.[Levin JO, Carleborg L; Ann Occup Hyg 31 (1): 31-8 (1987)]**PEERREVIEWED**

Sampling Procedures :

PORTABLE IR ANALYZERS MATED WITH MICROCOMPUTER ARE SUITABLE FORON-SITE MONITORING OF MIXTURES OF METHYL ETHYL KETONE.[SYRJALA R; IND RES 19 (6): 81 (1977)]**PEER REVIEWED**

RCRA Requirements :

F005; When methyl ethyl ketone is a spent solvent, it is classified as a hazardous waste from anonspecific source (F005), as stated in 40 CFR 261.31, and must be managed according to Stateand/or Federal hazardous waste regulations.[40 CFR 261.31 (7/1/96)]**PEER REVIEWED**

TSCA Requirements :

Pursuant to section 8(d) of TSCA, EPA promulgated a model Health and Safety Data ReportingRule. The section 8(d) model rule requires manufacturers, importers, and processors of listedchemical substances and mixtures to submit to EPA copies and lists of unpublished health andsafety studies. Methyl ethyl ketone is included on this list.[40 CFR 716.120 (7/1/96)]**PEER REVIEWED**

Atmospheric Standards :

Listed as a hazardous air pollutant (HAP) generally known or suspected to cause serious healthproblems. The Clean Air Act, as amended in 1990, directs EPA to set standards requiring majorsources to sharply reduce routine emissions of toxic pollutants. EPA is required to establish andphase in specific performance based standards for all air emission sources that emit one or moreof the listed pollutants. Methyl ethyl ketone is included on this list.[Clean Air Act as amended in 1990, Sect. 112 (b) (1) Public Law101-549 Nov. 15, 1990]**QC REVIEWED**


Groups of rats were exposed to 100 ppm hexane, 200 ppm methyl ethyl ketone (MEK), orfresh air in an exposure chamber 12 hr daily for 24 weeks. Body weight, motor nerveconduction velocity, distal motor latency, and mixed conduction velocities were measuredbefore exposure and after 4, 8, 12, 16, 20, and 24 wk exposure. ... Exposure to 200 ppm MEKsignificantly increased motor nerve conduction velocity, and mixed conduction velocities anddecreased distal motor latency after 4 week exposure; but at a later stage no significant changeswere found. Mixed exposure to 100 ppm hexane and 200 ppm MEK significantly decreaseddistal motor latency after 4 week exposure and decreased motor nerve conduction velocity andmixed conduction velocities after 20 and 24 week exposure.[Takeuchi Y et al; Br J Ind Med 40 (2): 199-203 (1983)]**PEERREVIEWED**

Other Chemical/Physical Properties :

CONSTANT BOILING MIXTURE WITH WATER, BP 73.4 DEG C, CONTAINS 88.7%METHYL ETHYL KETONE (MEK); SOLUBILITY OF WATER IN MEK IS 12.5% @ 25DEG C[Budavari, S. (ed.). The Merck Index - An Encyclopedia ofChemicals, Drugs, and Biologicals. Whitehouse Station, NJ: Merck



and Co., Inc., 1996. 1037]**PEER REVIEWED**


Intraperitoneal injection of 750, 1500 or 2000 mg/kg methyl ethyl ketone to guinea pigsresulted in elevated serum ornithine carbamyl transferase (OCT) activity at the highest dose,where one of four animals died, and deposition of lipids in the liver with either 1500 or 2000mg/kg was found.[DiVincenzo GD et al; Am Ind Hyg Assoc J 34: 329 (1974)]**PEERREVIEWED**

Acceptable Daily Intakes :

... An Acceptable Daily Intake (ADI), defined as the amount of a chemical to which humans canbe exposed on a daily basis over an extended period of time (usually a lifetime) withoutsuffering a deleterious effect, for methyl ethyl ketone is 3.2 mg/day for oral exposure. ...[USEPA; Health and Environmental Effects Profile for MethylEthyl Ketone p.80 (1988) EPA/600/X-85/363]**PEER REVIEWED**


NIOSH has est worker exposure to methyl ethyl ketone at 3,031,000 ...[Sittig, M. Handbook of Toxic and Hazardous Chemicals andCarcinogens, 1985. 2nd ed. Park Ridge, NJ: Noyes DataCorporation, 1985. 601]**PEER REVIEWED**

Special Reports :

USEPA; Health and Environmental Effects Profile for Methyl Ethyl Ketone p.80 (1988)EPA/600/X-85/363

Interactions :

The effects of acute exposure to toluene and methyl ethyl ketone (MEK) singly and incombination were investigated. ... The effects of these chemicals on behavior and body burdenwere determined. ... MEK had no effect on any measures. Behavior performance was notaffected by the combination of toluene and MEK. Body burden of the two solvents was notadditive. ... Neither chemical potentiated the effect of the other at the concentrations studied.[Dick RB et al; Int Arch Occup Environ Health 54 (2): 91-109(1984)]**PEER REVIEWED**

Other Chemical/Physical Properties :

Partition coefficients at 37 deg C for methyl ethyl ketone into blood= 202; into oil= 263.[Sato A, Nakajima T; Scand J Work Environ Health 13: 81-93(1987)]**PEER REVIEWED**


A workman splashed his eye accidentally /with methyl ethyl ketone/, but the next day had onlyslight conjunctival hyperemia and no residual corneal injury. Despite the mildness of the injury,in the next few days the affected eye developed severe anterior uveitis triggered by slighttrauma.[Grant, W.M. Toxicology of the Eye. 3rd ed. Springfield, IL:Charles C. Thomas Publisher, 1986. 617]**PEER REVIEWED**


Rats were given a single oral dose of methyl ethyl ketone (MEK). The blood concn of MEKand metabolites 4 hr after dosing were: MEK (94.1 mg/100 ml); 2-butanol (3.2 mg/100 ml);3-hydroxy-2-butanol (2.4 mg/100 ml) and 2,3-butanediol (8.6 mg/100 ml). Blood concn of theparent compound and metabolites 18 hr after dosing with MEK were: MEK (6.2 mg/100 ml);2-butanol (0.6 mg/100 ml); 3-hydroxy-2-butanone (1.4 mg/100 ml); and 2,3-butanediol (25.6mg/100 ml).[Dietz FKJ, Traiger GJ; Toxicology 14: 209-14 (1979)]**PEER



REVIEWED**

Absorption, Distribution & Excretion :

Workers occupationally exposed to methyl ethyl ketone (MEK) were examined. ... Workersexposed to 300 micrograms per liter MEK, the aveolar concn was 30% of the environmentalconcn. Lung uptake averaged 1.05 mg/min. The blood concn of MEK ranged from 842 to 9573ug/l, with a mean of 2630 ug/l. Blood concn of MEK were strongly correlated with alveolarconcn. MEK was more soluble in heart and muscle tissue than in lung tissue or fat. UrinaryMEK excretion ranged from 120 to 1120 mg/l, with a mean of 487 mg/l. ... MEK was notpersistent in the tissues. ... Urinary excretion of MEK and acetylmethylcarbinol are only around0.1% of MEK lung absorption, the main pathway through which MEK is eliminated isunknown.[Perbellini L et al; Intern Arch Occup Environ Health 54 (1):73-81 (1984)]**PEER REVIEWED**


The ability of methyl ethyl ketone to induce specific locus mutations at the TK locus incultured L5178Y mouse lymphoma cells (Mouse Lymphoma Mutagenicity Assay) wasevaluated in the presence and absence of Aroclor-induced rat liver S9 metabolic activation.Based on preliminary toxicity tests, 10 nonactivated cultures treated with 12, 8.9, 6.7, 5.0, 3.8,2.8, 2.1, 1.6, 1.2 and 0.89ul/ml were cloned, producing a range of 46 - 122% total growth. TenS9-activated cultures treated with 8.9, 6.7, 5.0, 3.8, 2.8, 2.1, 1.6, 1.2, 0.89 and 0.67ul/ml werecloned, producing a range of 30 - 116% total growth. None of the cultures that were clonedproduced mutant frequencies which were significantly greater than the mean mutant frequencyof the solvent controls (DMSO, acetone).[Microbiological Associates Inc.; L5178Y TK +/- Mouse LymphomaMutagenicity Assay, Final Report, (1984), EPA Document No.40-8444072, Fiche No. OTS0507470] **UNREVIEWED**

Special Reports :

WHO; Environmental Health Criteria 143: Methyl Ethyl Ketone (1993)

Plant Concentrations :

32 samples of southern pea seed, Vigna unguiculata, were analyzed for volatiles. Methyl ethylketone (MEK) was found in all samples and the mean concn was 151 + or - 80 ppb (74 to 390ppb).[Fisher GS et al; J Agric Food Chem 27: 7-11 (1979)]**PEERREVIEWED**

Environmental Bioconcentration :

An estimated BCF value of 1 was calculated for methyl ethyl ketone(SRC), using anexperimental log Kow of 0.29(1) and a recommended regression-derived equation(2).According to a classification scheme(3), this BCF value suggests that bioconcentration inaquatic organisms is low(SRC).[(1) Hansch C et al; Exploring QSAR Hydrophobic, Electronic andStearic Constants Washington DC: Amer Chem Soc (1995) (2) LymanWJ et al; Handbook of Chemical Property Estimation Methods.Washington DC: Amer Chem Soc pp. 5-4, 5-10 (1990) (3) Franke Cet al; Chemosphere 29: 1501-14 (1994)]**PEER REVIEWED**

Clinical Laboratory Methods :

A method is described for the determination of the concn of methyl ethyl ketone and itsmetabolites: 2-butanol, 3-hydroxy-2-butanone, and the meso- and d,l-isomers of 2,3-butanediolin urine. The analytes were isolated from urine by solid-phase extraction and analyzed bycapillary gas chromatography. The recovery rates were 50-70% for the 2,3-butanediol isomersand 88-96% for the other analytes. The precision of the method ranged 5-12% (standarddeviation %). The detection limit was 1.0 and 1.4 mg/l for meso- and d,l 2,3-butanediol,respectively, and ranged 0.1-0.15 mg/l for the other analytes.



[Kezic S, Monster AC; J Chromatogr 428 (2): 275-80 (1988)]**PEERREVIEWED**


EPA Method 8015: Nonhalogenated Volatile Organics. For the analysis of solid waste, arepresentative sample (solid or liquid) is collected in a standard 40 ml glass screw-cap VOA vialequipped with a Teflon-faced silicone septum. Sample agitation, as well as contamination of thecollected sample with air, must be avoided. Two VOA vials are filled per sample location, thenplaced in separate plastic bags for shipment and storage. Samples can be analyzed by directinjection or purge-and trap gas chromatography. A temperature program is used in the gaschromatograph to separate the organic compounds. Column 1 is an 8 ft by 0.1 in ID stainlesssteel or glass column packed with 1% SP-1000 on Carbopack-B 60/80 mesh or equivalent.Column 2 is a 6 ft by 0.1 in ID stainless steel or glass column packed with n-octane on Porasil-C100/120 mesh (Durapak) or equivalent. Detection is achieved by a flame ionization detector(FID). Under the prescribed conditions, methyl ethyl ketone can be detected using this method.No statistical analysis was determined; specific method performance information will beprovided as it becomes available.[USEPA/Office of Solid Waste (OSW); Test Methods for EvaluatingSolid Waste, Physical/Chemical Methods SW846 Methods(1986)]**PEER REVIEWED**

Environmental Biodegradation :

Methyl ethyl ketone (MEK) is readily oxidized by microorganisms in activated sludgefollowing selection and/or adaptation, with over 80% being removed in 24 hr. Metabolism inunacclimated sludges is slow.[USEPA; Methyl Ethyl Ketone III: Exposure Aspects USEPA ContractNo. 68-01-6147 (1981)]**PEER REVIEWED**

Natural Pollution Sources :

Methyl ethyl ketone occurs naturally as a metabolic byproduct of plants and animals and isreleased into the atmosphere by volcanoes and forest fires(1).[(1) Graedel TE et al; Atmospheric Chemical Compounds. NY,NY:Academic Press p. 263 (1986)]**PEER REVIEWED**

Mechanism of Action :

The effects of the solvents n-hexane, butanone (methyl ethyl ketone, MEK) and a mixture ofboth in the intrapulmonary nerve system of rats were studied by light and electron microscopy.The alteration in the fine structures of the tissue consisted in a disseminated swelling of axonsdue to a striking multiplication of neurofilaments. Nonspecific axonal alterations could bedemonstrated as well. The latter consisted in clusters of phospholipid material within theaxoplasm of nerve fibers and the cytoplasm of Schwann cells plus an accumulation of glycogengranules in the axoplasm. Additionally, single degenerative changes of Schwann cells wereobserved. An enzyme associated metabolic damage with a concomitant impairment of axonalflow is discussed as a possible underlying pathomechanism.[Schmidt R et al; Respiration 46 (4): 362-9 (1984)]**PEERREVIEWED**

Biological Half-Life :

Guinea pigs were given a single dose of methyl ethyl ketone (MEK) ip at 450 mg/kg. Bloodsamples were taken via cardiac puncture at 1, 2, 4, 6, 8, 12 and 16 hr after dosing. Serumhalf-life of MEK was estimated at 270 minutes.[Divincenzo GD et al; Toxicol Appl Pharm 36: 511-22(1976)]**PEER REVIEWED**


Resting cells of Lactobacillus brevis 24 reduced methyl ethyl ketone (MEK) quantitatively to2-butyl alcohol when incubated in phosphate buffer for 24 hr at 30 deg C.[Keen AR et al; J Dairy Res 41: 249-57 (1974)]**PEER REVIEWED**




The ability of methyl ethyl ketone to cause chromosome aberrations was evaluated in culturedrat (strain not reported) liver cell line. Based on preliminary toxicity determinations, rat livercultures were exposed to 250, 500 or 1000 ug/ml and incubated for 24 hours. Two hours prior tothe end of incubation, colcemid was added and at the end of incubation period 100 cells fromeach culture were analyzed. No increase (statistical analysis not reported) in the frequency ofchromatid gaps, chromatid breaks or total chromatid aberrations were observed in any of thecultures.[Sittingbourn Research Center; Toxicity Studies with ChemicalSolvents: Short Term In Vitro Tests for Genotoxic Activity withMethyl Ethyl Ketone, (1982), EPA Document No. 878210125, FicheNo. OTS0206206 ] **UNREVIEWED**

Hazardous Reactivities & Incompatibilities :

MIXING METHYL ETHYL KETONE & CHLOROSULFONIC ACID OR OLEUM IN ACLOSED CONTAINER CAUSED THE TEMP & PRESSURE TO INCR.[McEvoy G.K. (ed.). American Hospital Formulary Service-DrugInformation 96. Bethesda, MD: American Society of Health-SystemPharmacists, Inc. 1996 (Plus Supplements).,p. 491M-90]**PEERREVIEWED**

Cleanup Methods :

The Hazardous Materials Technical Center (HMTC), an EPA emergency response cleanupservices contractor cleaned up a methyl ethyl ketone (MEK) spill and decontaminated thegroundwater. The spill cleanup involved removing low concentrations of MEK fromgroundwater. The spill was caused by an overturned tank truck containing 7200 gallons ofMEK. MEK was directed into four dry wells that served as primary storm drainage.Immediately after the incident, 6000 gallons of water were pumped from the dry well; 2400gallons of MEK were recovered from the water. About 1500 gallons of MEK were removedfrom the truck, and the remaining 3300 gallons of MEK either vaporized or entered anunsaturated zone. MEK concentrations up to 2200 mg/l were reduced to 50 ug/l beforereinjection. Levels of MEK in the sample wells, production wells, and reinjection wells werereduced to nondetectable levels.[Halvorsen F, Ohneck R; Proceedings of the National Conferenceon Hazardous Wastes and Environmental Emergencies p.193-95(1985)]**PEER REVIEWED**

Allowable Tolerances :

Methyl ethyl ketone is exempted from the requirement of a tolerance when used as a solvent,cosolvent in accordance with good agricultural practice as inert (or occasionally active)ingredients in pesticide formulations applied to growing crops only.[40 CFR 180.1001(d) (7/1/96)]**PEER REVIEWED**


Pregnant rats inhaled 0, 400, 1000, or 3000 ppm of methyl ethyl ketone for 7 hr/day on days6-15 of gestation. Maternal toxicity evidenced by decreased weight gain and increased waterconsumption was seen among rats exposed to 3000 ppm. Fetotoxicity (increased incidence of 2minor skeletal variants) was observed among litters of rats exposed to 3000 ppm.[Deacon MM et al; Toxicol Appl Pharmacol 59 (3): 620-2(1981)]**PEER REVIEWED**


The mutagenicity of methyl ethyl ketone (MEK) was evaluated in bacterial tester strains E. coliWP2 and WP2uvrA and Salmonella TA98, TA100, TA1535, TA1537 and TA1538, and theyeast Saccharomyces cerevisiae tester strain JD1, both in the presence and absence of addedmetabolic activation by Aroclor-induced rat liver S9 fraction. Based on preliminary bacterialtoxicity determinations, MEK, diluted with DMSO, was tested for mutagenicity at



concentrations up to 4000 ug/plate in the bacterial tests and 5000 ug/plate in the yeast testsusing the agar overlay method. MEK did not cause a positive response in any of the bacterialtester strains, either with or without metabolic activation.[Shell Sittingbourne Research Centre; Toxicity Studies withChemical Solvents: Short-Term in Vitro Tests for GenotoxicActivity with Methyl Ethyl Ketone. (1982), EPA Document No.878210125, Fiche No. OTS0206206] **UNREVIEWED**

Artificial Pollution Sources :

Methyl ethyl ketone's production and use as a solvent for coatings, resins, rubbers, plastics,pharmaceuticals, adhesives and rubber cements(1-3) will result in its release to the environmentthrough various waste streams(SRC). Its use as a starting material or intermediate in themanufacture of chemical products(2,3) will also lead to its release to the environment(SRC).[(1) Budvari S; Merck Index, 12th ed, Whitehouse Station,NJ:Merck & Co. p. 1773 (1996) (2) Browning E; Toxicity andMetabolism of Industrial Solvents. NY,NY: American Elsevier(1965) (3) Lewis RJ Sr ed; Hawley's Condensed ChemicalDictionary. 12th ed NY,NY: Van Nostrand Rheinhold Co p. 768(1993)]**PEER REVIEWED**



HSDB

Item 2 of 140

Best Sections1 Non-Human Toxicity Excerpts

2 Interactions

3 Non-Human Toxicity Excerpts

4 Interactions

5 Interactions


7 Explosive Limits & Potential

8 Formulations/Preparations

9Protective Equipment &Clothing






15 Hazardous Decomposition

16 Synonyms

17Hazardous Reactivities &Incompatibilities

18 Special Reports

19 Fire Potential

20 Methods of Manufacturing

21 Flash Point


23 Cleanup Methods

24 Storage Conditions


26 Fire Fighting Procedures

2-BUTANONE PEROXIDECASRN: 1338-23-4For other data, click on the Table of Contents

Best SectionsNon-Human Toxicity Excerpts :

In vitro damage by methyl ethyl ketone peroxide tocytochrome p450 and its associated enzymatic activity wasstudied. The extent of methyl ethyl ketone peroxide inhibitionwas different for tetramethylphenylenediamine-peroxidase,NADH-peroxidase, and aminopyrine demethylase. In vitroaddition of methyl ethyl ketone peroxide induced productionof more thiobarbituric acid reacting substances in livermicrosomes from vitamin E deficient rats than from vitamin Esupplemented rats. When NADH and/or NADPH weresupplied as reductants of methyl ethyl ketone peroxide, theinhibition of aminopyrine demethylase activity and thegeneration of thiobarbituric acid reacting substances by addedmethyl ethyl ketone peroxide were markedly reduced.[Ando M, Tappel AL; Chem Biol Interact 55(3): 317-26 (1985)]**PEER REVIEWED**

Interactions :

The tumor promoting effect of methyl ethyl ketone peroxideand the influence of diethyl maleate on this effect, withultraviolet radiation as the tumor initiator, was studied inhairless albino mutant mice. Four groups of 24 animals wereirradiated with ultraviolet light at a daily dose of 2,054Joules/sq m, 5 days per week. Three weeks after completion ofirradiation, the animals received skin applications twiceweekly for 25 weeks of either 1 microgram per microliterdiethyl maleate in acetone, acetone alone followed by 0.5microgram per microliter methyl ethyl ketone peroxide indibutyl phthalate, or dibutyl phthalate alone. Other groups ofanimals were treated with chemicals without ultraviolet lightpretreatment. The animals were killed after 46 weeks andexamined for tumors. The great majority of animals with




27Skin, Eye and RespiratoryIrritations

28 Interactions

29 Analytic Laboratory Methods

30 Stability/Shelf Life





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Emergency Medical Treatment







Interactions

Pharmacology

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tumors were in the irradiated groups. The highest tumor yieldoccurred in mice exposed to both dibutyl phthalate and methylethyl ketone peroxide after untraviolet light. Dibutyl maleatealone had no measureable effect on the development oftumors. Methyl ethyl ketone peroxide produced an increase intumor prevalence, but the effect was less marked than in thecombined presence of methyl ethyl ketone peroxide anddiethyl maleate.[Logani MK et al; Food Chem Toxicol 22(11): 879-882 (1984)]**PEER REVIEWED**


Rats fed a vitamin E deficient diet from age 3-10 weeks wereeither maintained on a vitamin E deficient diet or fed a vitaminE enriched diet for 8 subsequent weeks. The content of vitaminE, endoperoxide derived malonaldehyde, lipofluorescentmaterial and polyunsaturated fatty acids, and the activities ofcatalase, glutathione reductase, and glutathione peroxidasewere then measured in cerebral tissues, with or withoutintoxication with methyl ethyl ketone peroxide. For thispurpose, one half of the animals in each vitamin E groupreceived a ip injection of 5 mg methyl ethyl ketone peroxideper kg of body weight, which was followed 44 hr later, ie, 4 hrbefore sample collection, by a second ip injection of 15 mgmethyl ethyl ketone peroxide per kg of body weight. Despitethe fact that the vitamin E concentration was twelve timeslower in the brain of vitamin E deficient rats, no significantchanges in other cerebral parameters was found between thetwo groups of animals. In contrast, the activity of seleniumglutathione peroxidase was markedly decrease in the liver of10 week old vitamin E deficient rats. Unexpectedly, acutesystemic intoxication with methyl ehtyl ketone peroxidecaused only a small, albeit significant, decrease in glutathionereductase activity in the brain of vitamin E sufficient rats,while no significant change in other cerebral parameters wasobserved in either group of animals.[Chaudiere J et al; Neurotoxicology 9 (2):173-9 (1988)]**PEER REVIEWED**

Interactions :

In vivo, methyl ethyl ketone peroxide damaged microsomalcytochrome p450 and chytochrome p450 mediated peroxidasein vitamin E-deficient rat liver. Dietary vitamin E treatment ofrats protected the microsomal enzymes from peroxide damage.In vivo, adequate levels of vitamin E and of NADH and



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NADPH are probably necessary to provide importantprotection to the endoplasmic reticulum during metabolism ofmethyl ethyl ketone peroxide.[Ando M, Tappel AL; Chem Biol Interact 55(3): 317-26 (1985)]**PEER REVIEWED**

Interactions :

Male Sprague-Dawley rats were fed 0, 3, 5 or 10 IU ofDL-alpha-tocopherol acetate per kg of diet for 12 wk. After 11weeks they were injected with 3.3 mg of methyl ethyl ketoneperoxide (MEKP)/kg body wt & after 12 wk with 13 mgmethyl ethyl ketone peroxide/kg body wt 3-4 hr beforedecapitation. In the absence of vitamin E, rat brain DNA wassignificantly damaged by the formation of DNA-proteincrosslinks & interstrand DNA crosslinks. Adequate dietaryvitamin E protected against this damage. 10 IU/kg was theadequate dose.[Summerfield FW, Tappel AL; Mutat Res 126(2): 113-20 (1984)]**PEER REVIEWED**


The stability of glutathione peroxidase was assessed in vivovia oxidative inactivation by methyl ethyl ketone peroxide.The stability of glutathione peroxidase was compared to otherenzymes. Some of the enzymes tested were very stable tomethyl ethyl ketone peroxide. Glutathione peroxidase in theabsence of glutathione was relatively slowly inactivated. Thus,glutathione peroxidase appears to be a relatively stable enzyme& is well suited to perform its role in peroxide detoxification& prevention of oxidative deterioration of cells.[Condell RA, Tappel AL; Arch BiochemBiophys 223 (2): 407-16 (1983)]**PEERREVIEWED**

Explosive Limits & Potential :

EXPLOSIVE DECOMP @ 230 DEG F. ... IT IS POSSIBLEFOR METHYL ETHYL KETONE PEROXIDE TO EXISTIN SEVERAL DIFFERENT STRUCTURES, SOME OFWHICH ARE EXTREMELY SHOCK SENSITIVE, EVEN IN60% CONCN. ... SPONTANEOUS CHEMICAL REACTION... OR EXPLOSION MAY OCCUR IF MIXED WITHREADILY OXIDIZABLE, ORGANIC OR FLAMMABLEMATERIALS OR CHEMICAL ACCELERANTS./METHYL ETHYL KETONE PEROXIDE DILUTEDWITH 40% DIMETHYL PHTHALATE OR OTHER




Preventive Measures

Stability/Shelf Life


Storage Conditions

Cleanup Methods

Disposal Methods

Occupational ExposureStandards

OSHA Standards

Threshold Limit Values

NIOSH Recommendations


Major Uses

Manufacturers



Consumption Patterns

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U. S. Imports

Laboratory Methods


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DILUENTS/[National Fire Protection Association.Fire Protection Guide on HazardousMaterials. 9th ed. Boston, MA: NationalFire Protection Association, 1986.,p.49-50]**PEER REVIEWED**

Formulations/Preparations :

Lupersol DEL /is/ a trade mark for 60% methyl ethyl ketoneperoxide in dimethyl phthalate; Lupersol DSW /is/ aproprietary trade name for methyl ethyl ketone. A liq fireresistant peroxide containing 11.5% active oxygen.[Gardner, W., E.I. Cooke and R.W.I. Cooke(eds.). Handbook of Chemical Synonyms andTrade Names. 8th ed. Boca Raton, Florida:CRC Press, Inc., 1978. 430]**PEERREVIEWED**

Protective Equipment & Clothing :

WEAR SELF-CONTAINED BREATHING APPARATUS;WEAR GOGGLES IF EYE PROTECTION NOTPROVIDED. /METHYL ETHYL KETONE PEROXIDEWITH 40% DIMETHYL PHTHALATE OR OTHERDILUENTS/[National Fire Protection Association.Fire Protection Guide on HazardousMaterials. 9th ed. Boston, MA: NationalFire Protection Association, 1986.,p.49-159]**PEER REVIEWED**


Embryotoxicity studies were conducted in 3 day old chickenembryos using the air chamber method. The potencies wereexpressed by the ED50 for the total embryotoxic effect of thechemicals, including deaths & malformations, up to day 14 ofthe incubation. All nine peroxides including methyl ethylketone peroxide caused malformations at a moderatefrequency.[Korhonen A et al; Environ Res 33 (1):54-61 (1984)]**PEER REVIEWED**


On repeated thrice weekly dosing of rats for 7 wk ip and bymouth at one-fifth the LD50, marked evidence of cumulativeeffect was observed; 2 of 5 rats died from the ip admin, all 5



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died by the oral route... Hyperemia of the lungs with petechiaeand gross hemorrhages were common and only findings in thelung of rats exposed for 4 hr to methyl ethyl ketone peroxidevapor. In the liver, occasional damage consisting of fattychanges in cells in the central portion of the lobule and incr innumber of round cells in the portal spaces; in the kidney, agranula precipitate or cast in the lumina of the convulutedtubules and desquamation of the epithelium of the proximaltubules.[American Conference of GovernmentalIndustrial Hygienists. Documentation ofthe Threshold Limit Values and BiologicalExposure Indices. 5th ed. Cincinnati,OH:American Conference of GovernmentalIndustrial Hygienists, 1986. 396]**PEERREVIEWED**


Methyl ethyl ketone peroxide ... /was/ tested by applying twodrops of 40% solution in dimethyl phthalate to rabbit eyes, and... found to cause severe damage, graded 6 on a scale of 0 to 7.(The solvent was not significantly injurious.) At 3% amoderate reaction occurred lasting for two days, followed byrapid improvement. Washing the eyes with water within fourseconds after application prevented injury of the eye in allcases.[Grant, W.M. Toxicology of the Eye. 3rded. Springfield, IL: Charles C. ThomasPublisher, 1986. 618]**PEER REVIEWED**


All 4 peroxides are irritants of the skin and mucousmembranes; however, the effects of methyl ethyl ketone(MEK, or 2-butanone) and cyclohexanone peroxides are muchgreater than those of benzoyl and dicumyl peroxides. Therelevance of studies on hemolytic effects of the peroxides tooccupational exposure of man is uncertain, and there are noother conclusive reports of systemic toxic effects.[Aringer L; Arbetarskyddsstyrelsen,Publikationsservice, 171 84 Solna, Sweden,64 pp. (1985)]**PEER REVIEWED**


Suicidal ingestion of the peroxide of methyl ethyl ketonecaused a severe metabolic acidosis, hemolysis, esophageal and



gastric necrosis, gastric perforation, and death.[Ellenhorn, M.J. and D.G. Barceloux.Medical Toxicology - Diagnosis andTreatment of Human Poisoning. New York,NY: Elsevier Science Publishing Co., Inc.1988. 1000]**PEER REVIEWED**

Hazardous Decomposition :

DECOMP BY HEAT & SUNLIGHT. /METHYL ETHYLKETONE PEROXIDE WITH 40% DIMETHYLPHTHALATE OR OTHER DILUENTS/[National Fire Protection Association.Fire Protection Guide on HazardousMaterials. 9th ed. Boston, MA: NationalFire Protection Association, 1986.,p.49-50]**QC REVIEWED**

Synonyms :

METHYL ETHYL KETONE PEROXIDE**PEER REVIEWED**

Hazardous Reactivities & Incompatibilities :

Vigorous decomp can be stimulated by even trace amt of awide variety of contaminants, such as strong acids, bases,metals, metal alloys and salts, sulfur cmpd, amines,accelerators or reducing agents. This is particularly true ofmethyl ethyl ketone and benzoyl peroxides, which areintentionally stimulated to decomp @ room temp using smallamt of accelerators.[International Labour Office. Encyclopediaof Occupational Health and Safety. Vols.I&II. Geneva, Switzerland: InternationalLabour Office, 1983. 1613]**PEERREVIEWED**

Special Reports :

DHHS/NTP; NTP Technical Report on Toxicity Studies ofMethyl Ethyl Ketone Peroxide in Dimethyl PhthalateAdministered Topically to F344/N Rats and B6C3F1 MiceNTP TOX 18 (1993) NIH Pub No. 93-3341

Fire Potential :

COMBUSTIBLE LIQUID. ... SELF-ACCELERATINGDECOMP TEMP OF THE 40% DIMETHYL PHTHALATE



SOLN, 145 DEG F. ... DANGEROUS WHEN EXPOSED TOHEAT & FLAMES. /METHYL ETHYL KETONEPEROXIDE DILUTED WITH 40% DIMETHYLPHTHALATE OR OTHER DILUENTS/[National Fire Protection Association.Fire Protection Guide on HazardousMaterials. 9th ed. Boston, MA: NationalFire Protection Association, 1986.,p.49-50]**QC REVIEWED**

Methods of Manufacturing :

Reaction of methyl ethyl ketone with hydrogen peroxide(peroxidation)[Ashford, R.D. Ashford's Dictionary ofIndustrial Chemicals. London, England:Wavelength Publications Ltd., 1994.583]**PEER REVIEWED**

Flash Point :

125-200 Deg F (micro open cup) /Methyl ethyl ketoneperoxide diluted with 40% dimethyl phthalate or otherdiluents/[National Fire Protection Association.Fire Protection Guide on HazardousMaterials. 9th ed. Boston, MA: NationalFire Protection Association, 1986.,p.49-50]**QC REVIEWED**


Fatal massive peripheral zonal hepatic necrosis developed in a47 yr old man who accidentally ingested a solution of methylethyl ketone peroxide in dimethyl phthalate. Such solutionscontain about 10% active oxygen. The clinical course wascharacterized by temporary cardiac arrest, abdominal burns,severe metabolic acidosis, rapid hepatic failure,rhabdomyolysis and respiratory insufficiency. A fatal outcomeresulted 4 days afterwards from hepatic coma associated withblood coagulation disorders. Microscopical examinationrevealed massive periportal hepatic necrosis accompanied byatypical pseudoductular proliferation. The proliferating cellswere probably of bile duct origin and exhibited atypia andmitoses.[Karhunen PJ et al; Hum Exp Toxicol 9 (3):197-200 (1990)]**PEER REVIEWED**



Cleanup Methods :

IN THE EVENT OF SPILLAGE AS A RESULT OF FIREAND/OR USE THE SPILLED MATERIAL SHOULD BEABSORBED ... WITH A NONCOMBUSTIBLEABSORBENT, SUCH AS VERMICULITE. SWEEP UP &PLACE IN PLASTIC CONTAINER FOR IMMEDIATEDISPOSAL. DO NOT USE SPARK-GENERATINGMETALS OR CELLULOSIC MATERIALS ... FORSWEEPING UP OR HANDLING ... DISPOSE OFABSORBED PEROXIDE IN SMALL QUANTITIES AT ATIME BY PLACING ... IN A REMOTE OUTDOOR AREA& IGNITING ... EMPTY PEROXIDE CONTAINERSSHOULD BE WASHED WITH 10% SODIUMHYDROXIDE SOLN. /METHYL ETHYL KETONEPEROXIDE DILUTED WITH 40% DIMETHYLPHTHALATE OR OTHER DILUENTS/[National Fire Protection Association.Fire Protection Guide on HazardousMaterials. 9th ed. Boston, MA: NationalFire Protection Association, 1986.,p.49-50]**PEER REVIEWED**

Storage Conditions :

SHOULD BE STORED IN COOL, VENTILATED,UNHEATED WELL-DETACHED, NONCOMBUSTIBLEBUILDING WITH NONCOMBUSTIBLE FLOORS.ISOLATE FROM OTHER STORED MATERIALS,PARTICULARLY ACCELERATORS, READILYOXIDIZABLE, ORGANIC OR FLAMMABLEMATERIALS. PROHIBIT POSSIBLE SOURCES OFIGNITION, INCL ELECTRICAL INSTALLATIONS ...LARGE-QUANTITY STORAGE SHOULD BEPROTECTED BY AUTOMATIC DELUGE SPRINKLERSYSTEM. PROTECT CONTAINERS AGAINST PHYSICALDAMAGE. /METHYL ETHYL KETONE PEROXIDEDILUTED WITH 40% DIMETHYL PHTHALATE OROTHER DILUENTS/[National Fire Protection Association.Fire Protection Guide on HazardousMaterials. 9th ed. Boston, MA: NationalFire Protection Association, 1986.,p.49-50]**QC REVIEWED**


ALL ... /PEROXIDE CATALYSTS/ ARE DANGEROUS TO



SKIN & IN PARTICULAR TO MUCOUS MEMBRANE OFEYE ... LIQ PEROXIDES CAN BE ABSORBED BY SKIN,PARTICULARLY METHYL ETHYL KETONEPEROXIDE, WHICH CAN CAUSE CERTAINPHYSIOLOGICAL DISORDERS (HEMOLYTIC ANEMIA).[Lefaux, R. Practical Toxicology ofPlastics. Cleveland: CRC Press Inc., 1968.145]**PEER REVIEWED**

Fire Fighting Procedures :

FIGHT FIRES FROM EXPLOSION-RESISTANTLOCATION. IN ADVANCED OR MASSIVE FIRES, AREASHOULD BE EVACUATED. IF FIRE OCCURS INVICINITY OF THIS MATERIAL WATER SHOULD BEUSED TO KEEP CONTAINERS COOL. ... DUE CAUTIONSHOULD BE EXERCISED BECAUSE OF THEPOSSIBILITY OF ADVERSE CONTAMINATION ANDCHEM CHANGE AFTER HEAT EXPOSURE. /METHYLETHYL KETONE PEROXIDE DILUTED WITH 40%DIMETHYL PHTHALATE OR OTHER DILUENTS/[National Fire Protection Association.Fire Protection Guide on HazardousMaterials. 9th ed. Boston, MA: NationalFire Protection Association, 1986.,p.49-50]**PEER REVIEWED**

Skin, Eye and Respiratory Irritations :

... Methyl ethyl ketone peroxide ... /is/ extremely irritatingand corrosive to the eyes, with risk of blindness ... .[International Labour Office. Encyclopediaof Occupational Health and Safety. Vols.I&II. Geneva, Switzerland: InternationalLabour Office, 1983. 1613]**PEERREVIEWED**

Interactions :

Vitamin E, selenium, vitamin C, & methionine were admin torats in various combinations by diet & ip injections to rank theindividual & combined protective ability of the biologicalantioxidants at minimum daily requirement levels & atpharmacological levels against lipid peroxidation initiated by50 mg methyl ethyl ketone peroxide (MEKP)/kg. In vivo lipidperoxidation was monitored throughout a 3 hr period bymeasuring pentane expired in the breath. Rats fed 30 IUDL-alpha-tocopherol acetate/mg diet significantly decreased



pentane production at 20 min by 88% compared to rats fed avitamin E- & selenium-deficient diet. Rats given 5 ipinjections of 180 IU DL-alpha-tocopherol acetate/kg furtherreduced expired pentane by 83% beyond the protectionafforded by dietary vitamin E. Neither additive nor synergisticprotection was found when other antioxidants were given incombination with vitamin E. Vitamin E was primary protectiveantioxidant. Pentane expired by individual rats from varioustreatment groups strongly correlated with the plasma vitamin Estatus.[Litov RE et al; Toxicol Appl Pharmacol 59(1): 96-106 (1981)]**PEER REVIEWED**


NIOSH Method 3508. Determination of Methyl Ethyl KetonePeroxide by Visible Absorption Spectrophotometry.[U.S. Department of Health and HumanServices, Public Health Service, Centersfor Disease Control, National Institutefor Occupational Safety and Health. NIOSHManual of Analytical Methods. 4thed.Methods A-Z & Supplements. Washington,DC: U.S. Government Printing Office, Aug1994.]**PEER REVIEWED**

Stability/Shelf Life :

SHOCK & HEAT SENSITIVE; DECOMP BY HEAT &SUNLIGHT. /METHYL ETHYL KETONE PEROXIDEWITH 40% DIMETHYL PHTHALATE OR OTHERDILUENTS/[National Fire Protection Association.Fire Protection Guide on HazardousMaterials. 9th ed. Boston, MA: NationalFire Protection Association, 1986.,p.49-50]**PEER REVIEWED**



HSDB Search Resultsfor METHYL ETHYL KETONE

Query:

Information added from CHEMID:methyl ethyl ketone Chemid Name: methylethyl ketone [78-93-3]( butanone, metyloetyloketon, metiletilchetone, methyl acetone,meetco, ethylmethylketon, aethylmethylketon )

Registry Numbers:78-93-3~1 record contains the exact substance name or CAS registry number.139 records contain all of the query terms anywhere in the record.

Items 1 through 20 of 140 Pages: 1 2 3 4 5 6 7

Substance Names are sorted in relevancy ranked order.

Substance Name

The following is the primary record for the chemical. All of the query termswere found.

1 METHYL ETHYL KETONE78-93-3

The following 139 records contain one or more of the requested chemicalname(s) and all of the query terms anywhere in the record.

2 2-BUTANONE PEROXIDE1338-23-4

3 N-NITROSONORNICOTINE16543-55-8

4 3,3-DIMETHYL-2-BUTANONE75-97-8

5 THIOFANOX39196-18-4

6 TRIADIMEFON43121-43-3

7 VITAMIN A68-26-8

8 ACETOIN513-86-0

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9 ETHANOL64-17-5

10 SEC-BUTYL ALCOHOL78-92-2

11 3-XYLENE108-38-3

12 2-HEXANONE591-78-6

13 DIACETYL431-03-8

14 N-NITROSOPYRROLIDINE930-55-2

15 METHYL ISOBUTYL KETONE108-10-1

16 3-HEPTANONE106-35-4

17 CAPSAICIN404-86-4

18 METHYL ISOPROPENYL KETONE814-78-8

19 ACETONE67-64-1

20 3-PENTANONE96-22-0

Items 1 through 20 of 140 Pages: 1 2 3 4 5 6 7

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Synonyms:


http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:1:sy~9 [21/04/2001 9:10:36 AM]


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Environmental Fate/Exposure Summary:

Methyl ethyl ketone's production and use as a solvent for coatings, resins, rubbers, plastics,pharmaceuticals, adhesives and rubber cements will result in its release to the environment throughvarious waste streams. Its use as a starting material or intermediate in the manufacture of chemicalproducts will also lead to its release to the environment. Methyl ethyl ketone occurs naturally as ametabolic byproduct of plants and animals and is released into the atmosphere by volcanoes and forestfires. Based on an experimental vapor pressure of 91 mm Hg at 25 deg C, methyl ethyl ketone isexpected to exist solely as a vapor in the ambient atmosphere. Vapor-phase methyl ethyl ketone isdegraded in the atmosphere by reaction with photochemically-produced hydroxyl radicals with anestimated atmospheric half-life of about 14 days. This compound is also expected to undergo photolysisin the atmosphere by natural sunlight. Photochemical degradation of methyl ethyl ketone by naturalsunlight is expected to occur at approximately 1/5 the rate of degradation by photochemically producedhydroxy radicals. Methyl ethyl ketone is expected to have very high mobility in soils based uponmeasured Koc values of 29 and 34 obtained in silt loams. Volatilization from dry soil surfaces isexpected based upon the vapor pressure of this compound. Volatilization from moist soil surfaces is alsoexpected based upon the measured Henry's Law constant of 4.7X10-5 atm-cu m/mol. The volatilizationhalf-life of methyl ethyl ketone from silt and sandy loams was measured as 4.9 days. This compound isexpected to biodegrade under aerobic and anaerobic conditions. In water, methyl ethyl ketone is notexpected to adsorb to suspended solids or sediment based upon its measured Koc values. Volatilizationfrom water surfaces is expected to be an important environmental fate process given its Henry's Lawconstant. Estimated half-lives for a model river and model lake are 19 and 197 hours, respectively.Bioconcentration in aquatic organisms is considered low based upon an estimated BCF value of 1.Occupational exposure may be through inhalation and dermal contact with this compound at workplaceswhere methyl ethyl ketone is produced or used. The general population may be exposed to methyl ethylketone through the use of commercially available products containing this compound such as paints,adhesives, and rubber cements. Exposure will also arise from inhalation of ambient air and ingestion ofdrinking water and food that contains methyl ethyl ketone. (SRC)**PEER REVIEWED**

http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:1:envs~0 [21/04/2001 9:10:44 AM]


Atmospheric Concentrations:

URBAN/SUBURBAN: Methyl ethyl ketone was detected at a mean concn of 1.5 ppb in Boston,MA(1). Methyl ethyl ketone was detected at mean concns of 1.35 ppb in Boston, MA, and 5.1 ppb inHouston, TX(2). The average concn of methyl ethyl ketone at 25 urban locations in the US was 1.4ug/cu m(3). Methyl ethyl ketone was detected at a mean concn of 1.67 ppb in Los Angeles, CA(4) andin the Caldecott Tunnel in San Francisco, CA at a concn of 1.67 mg/l(5). Methyl ethyl ketone wasdetected at average concns of 0.222-1.366 ppb in Grenoble, France(6). An average concn of 0.638 ppb ofmethyl ethyl ketone was obtained from 714 atmospheric samples in the US(7).[(1) Reiss R et al; J Air Waste Manage Assoc 45: 811-22(1995) (2)Kelly TJ et al; Environ Sci Technol 27: 1146-53 (1993) (3) Kelly TJ etal; Ambient concn summaries for Clean Air Act. Title III. HazardousAir Pollutants. USEPA Contract No 68-D80082 USEPA/600/R-94/090 (1993)(4) Grosjean E et al; Environ Sci Technol 30: 2687-2703 (1996) (5)Kirschstetter TW et al; Environ Sci Technol 30: 661-70 (1996) (6)Foster P et al; Pollut Atmos: 175-91 (1991) (7) Shah JJ, Heyerdahl EK;Environ Sci Technol 22: 1381-88 (1988)]**PEER REVIEWED**

http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:1:atmc~1 [21/04/2001 9:10:45 AM]


Effluent Concentrations:

Methyl ethyl ketone was detected in the effluent of a municipal landfill in Quebec, Ontario at concns of5,200 ppb and 3092 ppb(1). Methyl ethyl ketone was identified, not quantified in the emissions of awaste incinerator in West Germany(2), automobiles(3) and common household waste(4-7). Methyl ethylketone was detected in the effluent from a solid waste composting plant at concns of 130 ug/cu m(background air), 25,500 ug/cu m(tipping area), 1,400 ug/cu m (shredder), 9,400 ug/cu m(indoor air),36,000 ug/cu m (digester), 4,300 ug/cu m(fresh compost), 8,700 ug/cu m(middle age compost), 14,500ug/cu m(old compost) and 1,400 ug/cu m(curing region)(8). Methyl ethyl ketone was identified, notquantified, in the emissions of 200 out of 1,026 common household products(9). Methyl ethyl ketonewas detected in the emissions of a photocopying machine at rates of less than 100 ug/hr to 380 ug/hr(10).Methyl ethyl ketone was detected at a concn of 974 ug/cu m in the emissions of active compost at acomposting facility in Virginia(11).[(1) Brosseau, Heitz M; Atmos Environ 25A: 1473-77 (1994) (2) Jay K,Stieglitz L; Chemosphere 30: 1249-60 (1995) (3) Harley RA et al;Environ Sci Technol 26: 2395-2408 (1992) (4) Wilkins CK, Larsen K; JHigh Resol Chromatogr 18: 373-77 (1995) (5) Wilkins K, Larsen K;Chemosphere 31: 3225-36 (1995) (6) Wilkins K, Larsen K; Chemosphere32: 2049-55 (1996) (7) Wilkins K; Chemosphere 29: 47-53 (1994) (8)Eitzer BD; Environ Sci Technol 29: 896-902 (1995) (9) Sack TM et al;Atmos Environ 26A: 1063-70 (1992)(10) Leovic KW et al; J Air WasteManage Assoc 46: 821-29 (1996) (11) Vandurme GP et al; Water EnvironRes 64: 19-27 (1992)]**PEER REVIEWED**

http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:1:effl~1 [21/04/2001 9:10:47 AM]


Probable Routes of Human Exposure:

NIOSH (NOES Survey 1981-1983) has statistically estimated that 1,221,857 workers (201,308 of theseare female) are potentially exposed to methyl ethyl ketone in the US(1). Occupational exposure may bethrough inhalation and dermal contact with this compound at workplaces where methyl ethyl ketone isproduced or used(SRC). The 8 hour TWA exposure to methyl ethyl ketone was 45.4 ppm in a survey of50 occupationally exposed male subjects working in a magnetic videotape producing factory(2). Theseworkers had average concns of methyl ethyl ketone of 2 ppm and 1.4 mg/l in breath and blood samplesrespectively(2). The mean concn of methyl ethyl ketone in the breathing zones of 47 US plants usingpolyurethane coatings was 4.33 ppm(3). Methyl ethyl ketone was detected in the breathing zones in 20of 70 samples (mean concn 12 mg/cu m) obtained from autobody shops and spray paint shops inAustralia(4).[(1) NIOSH; National Occupational Exposure Survey (NOES) (1983) (2)Sia Gl et al; Environ Monit Assess 19: 401-11 (1991) (3) Myer HE etal; Am Ind Hyg Assoc J 54: 663-70 (1993) (4) Winder C, Turner PJ; AnnOccup Hyg 36: 385-94 (1992)]**PEER REVIEWED**

http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:1:rtex~2 [21/04/2001 9:10:48 AM]


Environmental Water Concentrations:

GROUNDWATER: Methyl ethyl ketone was detected in groundwater at a coal strip-mine in Ohio at aconcn of 650 mg/l(1). Methyl ethyl ketone was identified, not quantified, in on-site and off-sitegroundwater near a landfill in New Jersey(2). Methyl ethyl ketone was detected in the groundwater of acoal strip-mine in Lackawanne, PA at a maximum concn of 29,000 ppb(3). Methyl ethyl ketone wasdetected at an average concn of 12 ug/l in the groundwater of 19 solid waste disposal facilities inWisconsin(4) and in the range of 0-91 ug/l in the groundwater of a landfill located in New Castle, DE(5).Methyl ethyl ketone was detected at an average concn of 60 ug/l in the groundwater of a chemicalmanufacturing facility in Alabama(6).[(1) USEPA; Superfund Record of Decision : Summit National Site,Deerfield OH. USEPA/ROD/R85-88/068 (1988) (2) USEPA; Superfund Recordof Decision: Lipari Landfill Mantau Township, NJ. USEPA/ROD/RO2-88/074(1988) (3) ATSDR; Health assessment for Beacon Heights LandfillNational Priorities List (NPL) Site, Beacon Falls, Connecticut, Region1. CERCLIS NO. CTD001145671. Agency for Toxic Substances and DiseaseRegistry PB90-135971 (1990) (4) Battista JR, Connelly JP; VOCcontamination at selected Wisconsin landfills - sampling results andpolicy implications. Wisc Dept of Natural Resources, Madison, WI.Publ-SW-094 (1989) (5) ATSDR; Health assessment for Tybouts Cornerland (Tybouts) National Priorities List (NPL) site, Wilmington, NewCastle County, Deleware, Region 3. CERCLIS NO. DED000606079. Agencyfor Toxic Substances and Disease Registry PB90-144387 (1989) (6)USEPA; Superfund Record of Decision: Ciba-Geigy (Mcintosh Plant), AL.USEPA/ROD/R04-89/056 (1989)]**PEER REVIEWED**

http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:1:watc~1 [21/04/2001 9:10:50 AM]


Environmental Fate:

TERRESTRIAL FATE: Measured Koc values of 29 and 34 were obtained for methyl ethyl ketone insilt loams(1). Based on a recommended classification scheme(2), methyl ethyl ketone is expected tohave very high mobility in soil(SRC). Volatilization of methyl ethyl ketone from dry soil surfaces isexpected based upon an experimental vapor pressure of 91 mm Hg at 25 deg C(3). Volatilization frommoist soil surfaces(SRC) is also expected given the measured Henry's Law constant of 4.7X10-5 atm-cum/mole(4). The volatilization half-life of methyl ethyl ketone from silt and sandy loams was measuredas 4.9 days(5). Methyl ethyl ketone is expected to biodegrade under both aerobic and anaerobicconditions as indicated by numerous screening tests(6-9).[(1) Walton BT et al; J Environ Qual 21: 552-58 (1992) (2) Swann RL etal; Res Rev 85: 23 (1983) (3) Alarie Y et al; Toxicol Appl Pharmacol134: 92-99 (1995) (4) Bhattacharaya SK et al; Water Res 30: 3099-3105(1996) (5) Anderson TA et al; J Environ Qual 20: 420-24 (1991) (6)Bridie Al, et al; Water Res 13: 627-30 (1979) (7) Price KS et al; JWater Pollut Control Fed 46: 63-77 (1974) (8) Bhattacharaya SK et al;Wat Res 30: 3099-3105 (1996) (9) Suflita JM, Mormile MR; Environ SciTechnol 27: 976-78 (1993)]**PEER REVIEWED**

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Environmental Biodegradation:

Using standard BOD and COD dilution techniques and a sewage inoculum, a theoretical BOD of 83%and a theoretical COD of 95% was reported over a 5 day incubation period(1). The percent theoreticalBOD of methyl ethyl ketone in freshwater was reported as 76%, 82%, 84% and 89% over 5, 10 15 and20 day incubation periods respectively(2). The percent theoretical BOD of methyl ethyl ketone insynthetic saltwater was reported as 32%, 62%, 63% and 69% over 5, 10 15 and 20 day incubationperiods respectively(2). 92-95% biodegradation was reported when 0.25 mg/l of methyl ethyl ketonewas fed through an activated sludge from a wastewater treatment plant over a 3 week incubationperiod(3). The percent theoretical methane recovery of methyl ethyl ketone in an anaerobic aquifer was89% over a 3 week incubation period following a 15 day acclimation period(4).[(1) Bridie Al, et al; Water Res 13: 627-30 (1979) (2) Price KS et al;J Water Pollut Control Fed 46: 63-77 (1974) (3) Bhattacharaya SK etal; Wat Res 30: 3099-3105 (1996) (4) Suflita JM, Mormile MR; EnvironSci Technol 27: 976-78 (1993)]**PEER REVIEWED**

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Volatilization from Water/Soil:

The Henry's Law constant for methyl ethyl ketone was measured as 4.7X10-5 atm-cu m/mole(SRC) at25 deg C(1). This value indicates that methyl ethyl ketone will volatilize from water surfaces(2,SRC).Based on this Henry's Law constant, the volatilization half-life from a model river (1 m deep, flowing 1m/sec, wind velocity of 3 m/sec) is estimated as approximately 19 hours(2,SRC). The volatilizationhalf-life from a model lake (1 m deep, flowing 0.05 m/sec, wind velocity of 0.5 m/sec) is estimated asapproximately 197 hours(2,SRC). Methyl ethyl ketone is expected to volatilize from dry soil surfacesgiven its experimental vapor pressure of 91 mm Hg at 25 deg C(3,SRC). The volatilization half-life ofmethyl ethyl ketone from silt and sandy loams was measured as 4.9 days(4).[(1) Bhattacharaya SK et al; Water Res 30: 3099-3105 (1996) (2) LymanWJ et al; Handbook of Chemical Property Estimation Methods. WashingtonDC: Amer Chem Soc pp. 15-1 to 15-29 (1990) (3) Alarie Y et al; ToxicolAppl Pharmacol 134: 92-99 (1995) (4) Anderson TA et al; J Environ Qual20: 420-24 (1991)]**PEER REVIEWED**

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Environmental Fate:

ATMOSPHERIC FATE: According to a model of gas/particle partitioning of semivolatile organiccompounds in the atmosphere(1), methyl ethyl ketone, which has an experimental vapor pressure of 91mm Hg at 25 deg C(2), will exist solely as a vapor in the ambient atmosphere. Vapor-phase methyl ethylketone is degraded in the atmosphere by reaction with photochemically-produced hydroxylradicals(SRC); the half-life for this reaction in air is estimated to be about 14(3,SRC) days. Methyl ethylketone is also expected to undergo photodecomposition in the atmosphere by natural sunlight(4,5).Photochemical degradation of methyl ethyl ketone by natural sunlight is expected to occur atapproximately 1/5 the rate of degradation by photochemically produced hydroxyl radicals(5).[(1) Bidleman TF; Environ Sci Technol 22: 361-367 (1988) (2) Alarie Yet al; Toxicol Appl Pharmacol 134: 92-99 (1995) (3) Atkinson R; J PhysChem Ref Data (1989) (4) Raber W et al; pp. 364-70 in Phys Chem BehavAtmos Pollut 5th ed Restelli G, Angeletti G eds, Kluwer: Dordecht,Netherlands (1990) (5) Altshuller AP; J Atmos Chem 13: 155-82(1991)]**PEER REVIEWED**



Sediment/Soil Concentrations:

Methyl ethyl ketone was detected in the soil of a coal strip mine in Ohio at mean concns of 1,682 ug/kg(surface soil), 11,750 ug/kg (2-4 feet), 38,000 ug/kg (4-6 feet), 5,368 ug/kg (6-8 feet)(1). Methyl ethylketone was identified, not quantified, in the subsurface soil of a gravel mine in Tennessee(2). Methylethyl ketone was detected at an average concn of 1,615 ug/kg in the soil of an unauthorized hazardouswaste disposal facility in New Jersey(3). Methyl ethyl ketone was detected at an average concn of 32ug/kg in the soil of a waste disposal facility in Kansas(4).[(1) USEPA; Superfund Record of Decision: Summit National Site,Deerfield OH. USEPA/ROD/R85-88/068 (1988) (2) USEPA; Superfund Recordof Decision: Galloway Ponds Site, Galloway, TN. USEPA/ROD/R04-86/013(1987) (3) USEPA; Superfund Record of Decision: Lang PropertyPemberton Township, NJ USEPA/ROD/R02-86/031 (1987) (4) USEPA;Superfund Record of Decision: Doepke Disposal (Holliday), KSUSEPA/ROD/R07-89/032 (1989)]**PEER REVIEWED**

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Food Survey Values:

Methyl ethyl ketone was detected in Swiss cheese (0.3 ppm) and cream (0.154-0.177 ppm)(1). Methylethyl ketone was identified, not quantified, in the volatiles of roasted barley, bread, honey, chicken,oranges, black tea, and rum(1), kiwi fruit(2), chickpea seeds(3), mutton, chicken and beef(4). Methylethyl ketone was detected at a concn of 1.83 ug/g in rotten mussels in Japan(5).[(1) Lande SS et al; Investigation of Selected Potential EnvironmentalContaminants: Ketonic Solvents. 331 pp. USEPA 560/2-76-003 (1976) (2)Tatsuka K et al; J Food Sci 38: 2176-80 (1990) (3) Rembold H et al; JAgric Food Chem 37: 659-62 (1989) (4) Shahidi F et al; CRC Crit RevFood Sci Nature 24: 141-243 (1986) (5) Yasuhara A; J Chromatogr 409:251-58 (1987)]**PEER REVIEWED**

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Methyl ethyl ketone was detected in the leachate of several municipal landfills at concns between110-6,600 ug/l(1). Methyl ethyl ketone was detected in the leachate of a sand and gravel pit near Utica,NY at a concn of 540 ug/l(2). Methyl ethyl ketone was detected in the leachate of an industrial landfill(53 mg/l) and a municipal landfill (0.11-27 mg/l)(3).[(1) Christensen TH et al; Crit Rev Environ Sci Technol 24: 119-202(1994) (2) USEPA; Superfund Record of Decision: Ludlow Sand and GravelSite, Town of Paris Oneida County, NY USEPA/ROD/R02-88/067 (1988) (3)Brown KW, Donnelly KC; Haz Waste Haz Mater 5: 1-30 (1988)]**PEERREVIEWED**

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RAIN/SNOW: An unspecified concn of methyl ethyl ketone was detected in the rainfall in Japan(1).Methyl ethyl ketone was detected at concns of 0-0.47 ppb in the clouds in California and as traceamounts in fog-ice(2). Methyl ethyl ketone was detected in clouds (1,390 ng/l) and rainfall (139 ng/l) ata state park in North Carolina(3).[(1) Kato T et al; Yokohama Kokuritsu Daigaku Kankyo Kagaku KenkyuSenta Kiyo 6: 11-20 (1980) (2) Grosjean D, Wright B; Atmos Environ 17:2093-6 (1983) (3) Aneja VP et al; J Air Waste Manage Assoc 43: 1239-44(1993)]**PEER REVIEWED**




SURFACE WATER: Methyl ethyl ketone was identified, not quantified, in the Black River inTuscaloosa, AL(1) and Newark Bay, NJ(2). Methyl ethyl ketone was detected in the Potomac River at aconcn of less than 40 ug/l(3). Methyl ethyl ketone was detected in a creek in New Castle, DE near alandfill at concns of 0-11,000 ug/l(4).[(1) Berstch W et al; J Chromatog 112: 701-18 (1975) (2) Gunster DG etal; Environ Pollut 82: 245-53 (1993) (3) Hall LWJR et al; AquatToxicol 10: 73-99 (1987) (4) ATSDR; Health assessment for TyboutsCorner land (Tybouts) National Priorities List (NPL) site, Wilmington,New Castle County, Deleware, Region 3. Agency for Toxic Substances andDisease Registry PB90-144387 (1989)]**PEER REVIEWED**




The general population may be exposed to methyl ethyl ketone through the use of commerciallyavailable products containing this compound such as paints, adhesives, and rubber cements(SRC).Exposure will also arise from inhalation of ambient air, ingestion of drinking water and food thatcontains methyl ethyl ketone(SRC). The average blood concn of methyl ethyl ketone in 600non-occupationally exposed individuals in the US was 7.1 ppb(1).[(1) Ashley DL et al; Clin Chem 40: 1401-04 (1994)]**PEER REVIEWED**



Environmental Abiotic Degradation:

The rate constant for the vapor-phase reaction of methyl ethyl ketone with photochemically-producedhydroxyl radicals has been measured as 1.15X10-12 cu cm/molecule-sec at 25 deg C(1). Thiscorresponds to an atmospheric half-life of about 14 days at an atmospheric concn of 5.0X10+5 hydroxylradicals per cu cm(1,SRC). Methyl ethyl ketone is also expected to undergo photodecomposition in theatmosphere by natural sunlight(2,3). Based on the actinic fluxes within the planet boundary layer, alongwith an estimated quantum yield and absorption cross section, the rate of photodissociation of methylethyl ketone by natural sunlight is approximately 1/5 the rate of dissociation by hydroxyl radicals(3).This compound is not expected to undergo hydrolysis in the environment due to a lack of functionalgroups which hydrolyze(SRC).[(1) Atkinson R; J Phys Chem Ref Data (1989) (2) Raber W et al; pp.364-70 in Phys Chem Behav Atmos Pollut 5th ed Restelli G, Angeletti Geds, Kluwer: Dordecht, Netherlands (1990) (3) Altshuller AP; J AtmosChem 13: 155-82 (1991)]**PEER REVIEWED**

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Interactions:

A study of the potential relationship between methyl ethyl ketone and 2,5-hexanedione was conducted.Male F344 rats weighing between 200 and 320 g were used. A sensorimotor/behavioral batteryconsisting of two simple reflex tests, hind limb grasp and hind limb place, and two complex functiontests, balance beam and accelerating rotorod performance, was used for identification and quantificationof neurological deficits. ... The enhancement of 2,5-hexanedione induced toxicity by methyl ethylketone could be correlated with higher tissue exposures of 2,5-hexanedione in animals receiving thecombined treatment. ... Methyl ethyl ketone may compete with 2,5-hexanedione for critical andnon-critical binding sites at the target neurofilament proteins.[Ralston WH et al; Toxicol Appl Pharm 81 (2): 319-27 (1985)]**PEERREVIEWED**

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TSCA Test Submissions:

The mutagenicity of methyl ethyl ketone was evaluated in Salmonella tester strains TA98, TA100,TA1535, TA1537 and TA1538 (Ames Test), both in the presence and absence of added metabolicactivation by Aroclor-induced rat liver S9 fraction. Based on the results of the preliminary bacterialtoxicity determinations, methyl ethyl ketone, diluted with DMSO, was tested for mutagenicity atconcentrations up to 32 ul/plate (presence metabolic activation) and 16 ul/plate (absence metabolicactivation) using the preincubation technique. Methyl ethyl ketone did not cause a reproducible positiveresponse in any of the bacterial tester strains, either with or without metabolic activation.[Microbiological Associates, Inc.; Salmonella/Mammalian-MicrosomePreincubation Mutagenicity Assay (Ames Test), (1984), EPA Document No.40-8444072, Fiche No. OTS0507470] **UNREVIEWED**

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Emergency Medical Treatment:

EMT Copyright Disclaimer:Portions of the POISINDEX(R) database are provided here for general reference. THE COMPLETEPOISINDEX(R) DATABASE, AVAILABLE FROM MICROMEDEX, SHOULD BE CONSULTEDFOR ASSISTANCE IN THE DIAGNOSIS OR TREATMENT OF SPECIFIC CASES. Copyright1974-1998 Micromedex, Inc. Denver, Colorado. All Rights Reserved. Any duplication, replication orredistribution of all or part of the POISINDEX(R) database is a violation of Micromedex' copyrights andis strictly prohibited.



Clinical Effects:

SUMMARY OF EXPOSURE 0.2.1.1 ACUTE EXPOSURE o ACUTE EXPOSURE (ORAL) - Most available information concerns inhalational or dermal exposure. A few cases involving ingestion of methyl ethyl ketone (and co-ingestants) or ketone peroxide (with co-ingestants) have resulted in CNS depression, respiratory depression or corrosive effects and sequelae. o ACUTE INHALATION - The effects vary, depending on extent and duration of exposure. Eye, nose and throat irritation, nausea, headache, vertigo, incoordination, CNS depression, narcosis and cardiorespiratory failure can occur. In most cases, recovery is usually rapid and complete. o CHRONIC EXPOSURE - The major concern with chronic exposure is axonal neuropathy with secondary myelin damage; usually manifested as paresthesias and muscle weakness. Only six-carbon, linear chain ketones metabolized to gamma-diketones (such as methyl n-butyl ketone) are implicated. o EYE EXPOSURE - Splash contact causes irritation, which may be slight, moderate, or severe, depending on the ketone. Vapors can cause irritation and lacrimation. o ROUTES OF EXPOSURE - Ketones are absorbed by ingestion, inhalation, and dermal exposure.

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o RELATED COMPOUNDS - Exposure to ketone solvents (methyl ethyl ketone, methyl isobutyl ketone, etc) must be distinguished from exposure to the peroxides of these same ketones. KETONE PEROXIDES are highly reactive and corrosive. Management of ketone peroxide exposure is discussed in a separate document. HEENT 0.2.4.1 ACUTE EXPOSURE o Splash contact causes irritation, which may be slight, moderate, or severe, depending on the specific ketone; vapors may cause irritation and lacrimation. CARDIOVASCULAR 0.2.5.1 ACUTE EXPOSURE o Tachycardia may occur. RESPIRATORY 0.2.6.1 ACUTE EXPOSURE o Ingestion of significant amounts may cause respiratory depression. Inhalation exposure may produce an anesthetic type of respiratory depression, dyspnea, and gasping. Pulmonary aspiration may result in chemical pneumonitis. NEUROLOGIC 0.2.7.1 ACUTE EXPOSURE o Acute inhalation exposure causes a progression of CNS effects, from headache, vertigo, incoordination, narcosis, dizziness, and tremor, to coma. Peripheral neuropathy has been reported following exposure to methyl-n-butyl ketone and 2,5-hexanedione. Trimethylnonanone is not associated with narcosis. o Chronic exposure causes axonal neuropathy with secondary myelin damage, usually manifested as paresthesias and muscle weakness. Only six-carbon, linear chain ketones metabolized to gamma-diketones (such as methyl n-butyl ketone) are implicated. GASTROINTESTINAL 0.2.8.1 ACUTE EXPOSURE o Nausea and vomiting may occur. HEPATIC 0.2.9.1 ACUTE EXPOSURE o Ketones may potentiate the hepatotoxicity of halogenated hydrocarbons. They may also inhibit aromatic hydrocarbon metabolism. ACID-BASE 0.2.11.1 ACUTE EXPOSURE o Metabolic acidosis has been reported. DERMATOLOGIC


0.2.14.1 ACUTE EXPOSURE o Skin exposure to the liquid or vapor may result in dermatitis and paresthesias of affected areas. Contact urticaria has also been reported. REPRODUCTIVE HAZARDS o Limited studies have generally documented little or no effect of ketones on reproduction in experimental animals. Human data is lacking. 2,5-Hexanedione has an effect on spermatogenesis in male experimental animals. CARCINOGENICITY 0.2.21.1 IARC CATEGORY o The ketones are generally unclassified by IARC. Those agents evaluated by IARC have been classified as having insufficient evidence to determine human carcinogenicity. 0.2.21.2 HUMAN OVERVIEW o No adequate human studies exist for the agents in this category. 0.2.21.3 ANIMAL OVERVIEW o Experimental animal studies are limited, but are generally negative, and agents in this group have little mutagenic activity. GENOTOXICITY o Extremely limited data is available for this class of agents. For many specific ketones, no data is available. Some studies report positive findings, but this category of agents appears to be generally non-mutagenic or only weakly mutagenic.

Laboratory:


Treatment Overview:


ORAL EXPOSURE o With ingestion of small amounts the major concern is pulmonary aspiration and gastrointestinal decontamination is not recommended. With ingestion of large amounts there is potential for systemic toxicity from gastrointestinal absorption and GI decontamination is suggested, keeping in mind that pulmonary aspiration is still a concern. o If the patient is obtunded, seizing, or has significant alterations in mental status, a cuffed endotracheal tube should be inserted prior to gastric aspiration. 1. For moderate ingestions (less than 100 milliliters) activated charcoal alone is recommended. 2. For large ingestions that have occurred within the past hour, careful gastric aspiration followed by activated charcoal is recommended. a. The lavage tube should be flexible, well lubricated with a water soluble gel to minimize gagging and vomiting, and of a large enough diameter to minimize vomiting of gastric contents around the tube and potential pulmonary aspiration. b. After the tube is in place, evacuate gastric contents rapidly. Repeated instillation of fluid to wash out the stomach is NOT suggested as it probably does not significantly enhance the removal of liquids and may enhance the potential for pulmonary aspiration. c. Instill activated charcoal prior to withdrawing the tube. d. For ingestions that have occurred more than 2 hours ago, gastric decontamination is not likely to be of benefit and is generally not warranted. o Administer activated charcoal for moderate or large ingestions. 1. ACTIVATED CHARCOAL: Administer charcoal as slurry (240 mL water/30 g charcoal). Usual dose: 25 to 100 g in adults/adolescents, 25 to 50 g in children (1 to 12 years), and 1 g/kg in infants less than 1 year old. o ACIDOSIS - Correct severe acidosis (pH < 7.1) with intravenous sodium bicarbonate. About 1 to 2 milliequivalents/kilogram is a useful starting dose. Monitor arterial blood gases to guide bicarbonate therapy. INHALATION EXPOSURE o DECONTAMINATION: Move patient to fresh air. Monitor


for respiratory distress. If cough or difficulty in breathing develops, evaluate for respiratory tract irritation, bronchitis, or pneumonitis. Administer 100 percent humidified supplemental oxygen with assisted ventilation as required. EYE EXPOSURE o DECONTAMINATION: Exposed eyes should be irrigated with copious amounts of tepid water for at least 15 minutes. If irritation, pain, swelling, lacrimation, or photophobia persist, the patient should be seen in a health care facility. DERMAL EXPOSURE o DECONTAMINATION: Wash exposed area extremely thoroughly with soap and water. A physician may need to examine the area if irritation or pain persists. o Treat dermal irritation or burns with standard topical therapy. Patients developing dermal hypersensitivity reactions may require treatment with systemic or topical corticosteroids or antihistamines.

Range of Toxicity:


[Rumack BH: POISINDEX(R) Information System. Micromedex, Inc.,Englewood, CO, 2001; CCIS Volume 107, edition exp February, 2001. HallAH & Rumack BH (Eds):TOMES(R) Information System. Micromedex, Inc.,Englewood, CO, 2001; CCIS Volume 107, edition exp February, 2001.]**PEER REVIEWED**



Interactions:

... An important observation was the marked potentiation of peripheral neurotoxicity observed whenanimals were exposed to n-butyl ketone in combination with methyl ethyl ketone at a ratio of 1:5,n-butyl ketone: methyl ethyl ketone. The latter solvent showed no neurotoxic effect alone.[Saida K et al; J Neuropathol Exp Neurol 35 (3): 207-25 (1976)]**PEERREVIEWED**




RURAL/REMOTE: Methyl ethyl ketone was detected at an average concn of 2.40 ng/l in the air of astate park in North Carolina(1). Methyl ethyl ketone was detected at an average concn of 18 ug/cu m atrural locations in Canada(2) and concns of 1.8-3.3 ppb in a rural location in Louisiana(3).[(1) Aneja VP et al; J Air Waste Manage Assoc 43: 1239-44 (1993) (2)Chan CC et al; J Air Waste Manage Assoc 40: 62-67 (1990) (3) KhalilMAK, Rasmussen RA; J Air Waste Manage Assoc 42: 810-13 (1992)]**PEERREVIEWED**




SOURCE AREAS: Methyl ethyl ketone was detected at a median concn of 64 parts per trillion and arange of 10-1,900 parts per trillion(1) in source dominated areas in New Jersey(1). Methyl ethyl ketonewas detected at a concn of 94 ppm near a reclamation plant(2).[(1) Brodzinsky R, Singh HB; Volatile Organic Chemicals in the AtmosSRI International Contract 68-02-3452 (1982) (2) Lande SS et al;Investigation of Selected Potential Environmental Contaminants:Ketonic Solvents 331 p USEPA 560/2-76-003 (1976)]**PEER REVIEWED**



Soil Adsorption/Mobility:

Measured Koc values of 29 and 34 were obtained for methyl ethyl ketone in silt loams(1). Based on arecommended classification scheme(2), methyl ethyl ketone is expected to have very high mobility insoil(SRC).[(1) Walton BT et al; J Environ Qual 21: 552-58 (1992) (2) Swann RL etal; Res Rev 85: 23 (1983)]**PEER REVIEWED**

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INDOOR AIR: Methyl ethyl ketone was detected at an average concn of 17.8 ug/cu m at dwellings inCanada(1) and 2.4 ppb in buildings in Boston, MA(2). Methyl ethyl ketone was detected in 2 federaloffice buildings in Portland, OR at concns between 2.0 and 40.9 ug/cu m(3). Four indoor air samples inthe US had average concns of MEK of 9.238 ppb(4).[(1) Chan CC et al; J Air Waste Manage Assoc 40: 62-67 (1990) (2)Reiss R et al; J Air Waste Manage Assoc 45: 811-22 (1995) (3) HodgesonAT et al; J Air Waste Manage Assoc 41: 1461-68 (1991) (4) Shah JJ,Heyerdahl EK; Environ Sci Technol 22: 1381-88 (1988)]**PEER REVIEWED**



Plant Concentrations:

Methyl ethyl ketone is emitted from pencil cedar, Zeravshan juniper, European firs and Evergreencyprus(1). Methyl ethyl ketone was detected in 32 of 32 samples of southern pea seeds at a mean concnof 151 ppb(2).[(1) Singh HB, Zimmerman PB; Adv Environ Sci Technol 24: 177-235(1992) (2) Fisher GS et al; J Agric Food Chem 27: 7-11 (1979)]**PEERREVIEWED**

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Environmental Fate:

AQUATIC FATE: Based on experimental Koc values of 29 and 34 obtained in silt loams(1), and arecommended classification scheme(2), methyl ethyl ketone is not expected to adsorb to suspendedsolids and sediment in water(SRC). Methyl ethyl ketone is expected to volatilize from watersurfaces(3,SRC) based on the measured Henry's Law constant of 4.7X10-5 atm-cu m/mole(4). Estimatedhalf-lives for a model river and model lake are 19 and 197, hours respectively(3,SRC). Biodegradation ofthis compound is expected based upon numerous screening tests(5-8). According to a classificationscheme(9), an estimated BCF value of 1(3,SRC), from an experimental log Kow of 0.29(10,SRC),suggests that bioconcentration in aquatic organisms is low(SRC).[(1) Walton BT et al; J Environ Qual 21: 552-58 (1992) (2) Swann RL etal; Res Rev 85: 23 (1983) (3) Lyman WJ et al; Handbook of ChemicalProperty Estimation Methods. Washington DC: Amer Chem Soc pp. 4-9(1990) (4) Bhattacharaya SK et al; Water Res 30: 3099-3105 (1996) (5)Bridie Al, et al; Water Res 13: 627-30 (1979) (6) Price KS et al; JWater Pollut Control Fed 46: 63-77 (1974) (7) Bhattacharaya SK et al;Wat Res 30: 3099-3105 (1996) (8) Suflita JM, Mormile MR; Environ SciTechnol 27: 976-78 (1993) (9) Franke C et al; Chemosphere 29: 1501-14(1994) (10) Hansch C et al; Exploring QSAR Hydrophobic, Electronic andStearic Constants Washington,DC: Amer Chem Soc (1995)]**PEERREVIEWED**




DRINKING WATER: A Federal survey of public groundwater supplies detected methyl ethyl ketone inless than 5% of the samples(1). Methyl ethyl ketone was identified, not quantified, in drinking watersupplies from 7 cities from varied sources and with different types of pollutant sources(2-4).[(1) Dyksen JE, Hess AF III; J Amer Water Works Assoc 74: 394-403(1982) (2) Coleman WE et al; pp. 305-207 in Analysis andIdentification of Organic Substances in Water. Keith L ed Ann Arbor,MI Ann Arbor Press (1976) (3) Scheeman MA et al; Biomed Mass Spectrom4: 209-11 (1974) (4) USEPA; New Orleans Area Water Supply Study. DraftAnalytical Report by the Lower Mississippi River Facility, Slidell(1974)]**PEER REVIEWED**



Milk Concentrations:

Methyl ethyl ketone was identified, not quantified in human milk samples in Bayonne, NJ(1) Pittsburgh,PA(1) Baton Rouge, LA(1) and Australia(2). Methyl ethyl ketone was identified, not quantified in 5 of8 samples of human milk from 4 US urban areas(3).[(1) Erickson MD et al; Acquisition and chemical analysis of mother'smilk for selected toxic substances. USEPA-560/13-80-029. Washington,DC: USEPA Off Pestic Toxic Substances (1980) (2) Urbach G; JChromatogr 404: 163-74 (1987) (3) Pellizzari ED et al; Bull EnvironContam Toxicol 28: 322-8 (1982)]**PEER REVIEWED**

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Interactions:

Methyl ethyl ketone potentiates carbon tetrachloride hepatoxicity in rats. Oral dosing with methyl ethylketone at 1.87, 2.4, or 1.2 ml/kg followed by ip injection with carbon tetrachloride at 0.1 ml/kgsignificantly enhanced the hepatotoxicity of carbon tetrachloride as measured by increased serumglutamic pyruvic transaminase activity and hepatic triglyceride concentration and decreased hepaticglucose-6-phosphatase activity.[Traiger GJ, Bruckner JV; J Pharmacol Exp Ther 196: 493 (1976)]**PEERREVIEWED**



Absorption, Distribution & Excretion:

Measurable (2.54 to 13 ug/l) quantities of methyl ethyl ketone appeared in expired air of adult humans 3min following dermal exposure to 100 ml methyl ethyl ketone applied to 91.5 sq cm of skin.[Wurster; J Pharm Sci 54: 554 (1965)]**PEER REVIEWED**

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The effects of methyl ethyl ketone were examined in the rat hepatocyte primary culture/DNA repairassay. Based on preliminary toxicity tests, methyl ethyl ketone was tested at concentrations of 5.0(relative toxicity 74.67%), 2.5, 1.0, 0.5, 0.1 or 0.01 ul/ml (relative toxicity 6.67%). None of the testedconcentrations caused a significant increase in unscheduled DNA synthesis over the solvent control(DMSO).[Microbiological Associates Inc.; Unscheduled DNA Synthesis in RatPrimary Hepatocytes, Final Report, (1984), EPA Document No.40-8444072, Fiche No. OTS0507470] **UNREVIEWED**




Methyl ethyl ketone was evaluated for the ability to increase the incidence of micronucleatedpolychromatic erythrocytes in bone marrow of male and female CD-1 mice treated by single i.p.injection (Micronucleus Test). Groups of 10 mice (5 male, 5 female) were sacrificed 12, 24 and 48 hoursfollowing injection of methyl ethyl ketone in corn oil at a dose of 1.96 ml/kg body weight (calculatedLD20 dose). The ratio of normochromatic to polychromatic erythrocytes were not significantly different(p > 0.05, ANOVA) in the treated groups compared with vehicle controls, regardless of sacrifice time.The incidence of micronucleated polychromatic erythrocytes was increased above the vehicle control 24hours after administration, but was not considered statistically significant when compared to all treatmentand vehicle control groups regardless of sacrifice time (p > 0.05, ANOVA).[Microbiological Associates Inc.; Activity of Methyl Ethyl Ketone inthe Micronucleus Cytogenetic Assay in Mice, Final Report, (1984), EPADocument No. 40-8444072, Fiche No. OTS0507470] **UNREVIEWED**



Interactions:

... The toxic neuropathy induced by methyl ethyl ketone is clinically and morphologically identical withthat induced by n-hexane and methyl butyl ketone. Methyl ethyl ketone can act synergistically withn-hexane to produce toxic neuropathy.[Alterkirch H et al; J Neurology 214: 137-52 (1977)]**PEER REVIEWED**




The ability of methyl ethyl ketone to induce morphological transformation in the BALB/3T3 mouse cellline (Cell Transformation Assay) was evaluated both in the presence and absence of added metabolicactivation by Aroclor-induced rat liver S9 fraction. Based on preliminary clonal toxicity determinations(exposure time=2 hrs), methyl ethyl ketone, diluted with phosphate buffered saline, was tested at 18, 13and 9ul/ml in the absence of metabolic activation, with cell survival ranging from 93.3% to 51.1%relative to the solvent control. Assays with metabolic activation were tested at 10, 8 and 6ul/ml (exposuretime=2 hrs), with cell survival ranging from 85.7% to 67.3%. None of the tested concentrations producedsignificantly greater transformation frequencies (p > 0.05, Modified Poisson Distribution) relative to thesolvent control.[Microbiological Associates Inc.; Activity of Methyl Ethyl Ketone inthe Morphological Transformation Assay using BALB/3T3 Mouse EmbryoCells, Final Report, (1984), EPA Document No. 40-8444072, EPA FicheNo. OTS0507470] **UNREVIEWED**



Non-Human Toxicity Excerpts:

Groups of Sprague-Dawley rats were exposed, by inhalation to ... methyl ethyl ketone (800 ppm, 2345mg/cu m) ... for 4 weeks. Increased liver weights and liver-to-body weight ratios were observed. Methylethyl ketone depressed the formation of 2 metabolites of androstenedione but did not alter theconcentration of cytochrome p450 in companion in vitro microsomal metabolism studies.[Toftgard R et al; Scand J Work Environ Health 7 (1): 31-7(1981)]**PEER REVIEWED**

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Special Reports:

Yang RS H; Residue Rev 97: 121-43 (1986). The toxicology of methyl ethyl ketone. A review withmany references on the manufacture, uses, and toxicity of methyl ethyl ketone.

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The presence of solvents such as toluene, xylene, methyl ethyl ketone, and other similar products in theindoor air of an automobile body repair shop, an offset printing facility and the adjacent dwellings wasmonitored, and the individual exposure of the corresponding workers and residents was tested bybiological monitoring of exhaled breath and by personal air sampling. The concentrations of solventstested in the air of both sites surveyed were lower than prevailing Dutch Maximum AllowableConcentration levels. The levels of solvents recorded in the air of apartments situated on top of thefacilities surveyed were significantly higher than the levels recorded in the surrounding dwellings. Thelevels of methyl ethyl ketone, toluene and xylene in personal air samples of employees at the body shopwere 1.5 times higher than in ambient air. The level of toluene in alveolar air of residents living abovethe automobile repair shop was 50 percent higher than that recorded in spot samples. The levels of othersolvents were equal to or lower than the detection level. At the offset printing facility, toluene, xylene,butylacetate, 2-ethoxyethanol and cyclohexanone in air and in personal air samples followed the samegeneral pattern identified for the body shop. In a dwelling next to the shop and in an apartment on top ofthe shop, the concentrations ranged from 3 to 9 percent and 14 to 19 percent, respectively, of the levelsrecorded inside the facility itself.[Verhoeff AP et al; Int Arch Occup Environ Health 59 (2): 153-63(1987)]**PEER REVIEWED**



Clinical Laboratory Methods:

Methyl ethyl ketone in biofluid samples is analyzed using headspace chromatography with a flameionization detector. The relative retention time is 0.816 min (relative to n-propanol 1.50 min).[Sunshine, Irving (ed.) Methodology for Analytical Toxicology.Cleveland: CRC Press, Inc., 1975.,p. VII/7]**PEER REVIEWED**

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Male and female Fischer 344 rats were exposed to 0, 1250, 2500, or 5000 ppm methyl ethyl ketone(MEK) vapors 6 hr/day, 5 day/wk for 90 days. The 90 day exposures had no adverse effect on the clinicalhealth or growth of male or female rats except for a depression of mean body wt in the 5000 ppmexposure group. The 5000 ppm animals had a slight but significant increase in liver weight, liverweight/body weight ratio, and liver weight/brain weight ratio at necropsy. Serum glutamic-pyruvictransaminase (SGPT) activity in the 2500 ppm female rats was elevated while the 5000 ppm female ratsexhibited significantly decreased serum glutamic-pyruvic transaminase SGPT activity. In addition,alkaline phosphatase, potassium, and blood glucose values for the 5000 ppm female rats were increased....[Cavender FL et al; Fundam Appl Toxicol 3: 264-70 (1983)]**PEERREVIEWED**



Consumption Patterns:

CHEMICAL PROFILE: Methyl Ethyl Ketone. Coatings solvent, 50%; adhesives, 13%; magnetic tapes,8%; lube oil dewaxing, 4%; printing inks, 3%; miscellaneous, 6%; exports, 16%.[Kavaler AR; Chemical Marketing Reporter 232 (8): 50 (1987)]**PEERREVIEWED**

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CHEMICAL PROFILE: Methyl ethyl ketone. Demand: 1986: 582 million lb; 1987: 600 million lb;1991 /projected/: 600 million lb (Includes exports; in addition, 52 million lb were imported in 1986).[Kavaler AR; Chemical Marketing Reporter 232 (8): 50 (1987)]**PEERREVIEWED**

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Chinese hamsters were exposed to ... methyl ethyl ketone ... known to be a strong inducer of aneuploidyin the yeast Saccharomyces cerevisiae. ... Solvent yielded negative results in the micro-nucleus test.[Basler A; Mutat Res 174 (1): 11-13 (1986)]**PEER REVIEWED**



Analytic Laboratory Methods:

EPA Method 1624 - Volatile Organic Compounds By GC/MS: Grab samples in municipal and industrialdischarges are collected. If residual chlorine is present, add sodium thiosulfate. Extraction is performedby a purge and trap apparatus. An isotope dilution gas chromatography/mass spectrometry method forthe determination of volatile organic compounds in municipal and industrial discharges is described.Unlabeled methyl ethyl ketone has a minimum level of 50 ug/l and a mean retention time of 848 sec.[40 CFR 136 (7/1/88)]**PEER REVIEWED**

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ANALYTE: METHYL ETHYL KETONE; MATRIX: AIR; RANGE: 0.01 MG/SAMPLE;PROCEDURE: ADSORPTION ON CHARCOAL DESORPTION WITH CARBON DISULFIDE, GC;PRECISION: NOT GIVEN.[U.S. Department of Health and Human Services, Public Health Service.Centers for Disease Control, National Institute for OccupationalSafety and Health. NIOSHManual of Analytical Methods, 3rd ed. Volumes1 and 2 with 1985 supplement, and revisions. Washington, DC: U.S.Government Printing Office, February 1984.,p. V1 2500-2]**PEERREVIEWED**



FDA Requirements:

Methyl ethyl ketone is a food additive permitted for direct addition to food for human consumption as asynthetic flavoring substance and adjuvant in accordance with the following conditions: 1) the quantityadded to food does not exceed the amount reasonably required to accomplish its intended physical,nutritive, or other technical effect in food, and 2) when intended for use in or on food it is of appropriatefood grade and is prepared and handled as a food ingredient.[21 CFR 172.515 (4/1/96)]**PEER REVIEWED**

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FDA Requirements:

Methyl ethyl ketone is an indirect food additive polymer for use as a basic component of single andrepeated use food contact surfaces. Residue limit 0.1% by weight of finished packaging cellophane.[21 CFR 177.1200 (4/1/96)]**PEER REVIEWED**



FDA Requirements:




FIFRA Requirements:

Methyl ethyl ketone is exempted from the requirement of a tolerance when used as a solvent, cosolventin accordance with good agricultural practice as inert (or occasionally active) ingredients in pesticideformulations applied to growing crops only.[40 CFR 180.1001(d) (7/1/96)]**PEER REVIEWED**

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U. S. Production:

The demand for methyl ethyl ketone was 3.0X10+11 g in 1978, 3.7X10+11 g in 1979 and projected tobe 3.6X10+11 g in 1983 (production plus imports)[Kavaler. Chem Market Reporter 1980]**PEER REVIEWED**

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METHYL ETHYL KETONE WAS EVALUATED FOR EFFECTS ON A DELAYED MATCH TOSAMPLE DISCRIMINATION TASK IN THE JUVENILE BABOONS. THE ANIMALS WEREEXPOSED TO HALF THE THRESHOLD LIMIT VALUE (245 MG/CU M) FOR 24 HR PER DAYDURING A 7 DAY PERIOD. EACH EXPOSURE CONDITION AFFECTED ACCURACY OFPERFORMANCE MINIMALLY BUT RESULTED IN INCREASED AND DECREASED EXTRARESPONSES DURING THE DELAY INTERVALS.[GELLER I; PHARMACOL BIOCHEM BEHAV 11 (4): 401-6 (1979)]**PEERREVIEWED**




Incubation of Ehrlich-Landschutz diploid ascites tumor cells in media containing 50 and 100 ppmmethyl ethyl ketone resulted in the destruction of 10.5 and 14.0% of the cells. Control incubations lostonly 4.2% of cells in the 5 hr period.[Holmberg; Environ Res 7: 183 (1974)]**PEER REVIEWED**



Atmospheric Standards:

This action promulgates standards of performance for equipment leaks of Volatile Organic Compounds(VOC) in the Synthetic Organic Chemical Manufacturing Industry (SOCMI). The intended effect ofthese standards is to require all newly constructed, modified, and reconstructed SOCMI process units touse the best demonstrated system of continuous emission reduction for equipment leaks of VOC,considering costs, non air quality health and environmental impact and energy requirements. Methylethyl ketone is produced, as an intermediate or final product, by process units covered under thissubpart.[40 CFR 60.489 (7/1/87)]**PEER REVIEWED**

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Threshold Limit Values:

BEI (Biological Exposure Index): Methyl ethyl ketone in urine at end of shift is 2 mg/l. (1988 adoption)[American Conference of Governmental Industrial Hygienists. ThresholdLimit Values (TLVs) for Chemical Substances and Physical AgentsBiological Exposure Indices for 1998. Cincinnati, OH: ACGIH, 1998.102]**QC REVIEWED**

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METHYL ETHYL KETONE DELAYED MATCH-TO-SAMPLE DISCRIMINATION TASK INTHE JUVENILE BABOON & ALSO SLOWED RESPONSE TIMES & INCR EXTRA RESPONSES.[GELLER I; NEUROBEHAV TOXICOL 1 (SUPPL 1): 9 (1979)]**PEER REVIEWED**




The effects of the solvents n-hexane, butanone (methyl ethyl ketone, MEK) and a mixture of both inthe intrapulmonary nerve system of rats were studied by light and electron microscopy. The alteration inthe fine structures of the tissues consisted in a disseminated swelling of axons due to a strikingmultiplication of neurofilaments. Nonspecific axonal alterations could be demonstrated as well. Thelatter consisted in clusters of phospholipid material within the axoplasm of nerve fibers and thecytoplasm of Schwann cells plus an accumulation of glycogen granules in the axoplasm. Additionally,single degenerative changes of Schwann cells were observed.[Schmidt R; Respiration 46 (4): 62-9 (1984)]**PEER REVIEWED**



Body Burden:

Worker exposures were investigated in April 1983 at the Hoover Company, North Canton, Ohio. ... Areaand personal air samples for numerous contaminants were collected and nonionizing radiation levelswere measured. ... General medical questionnaires and blood tests for methyl ethyl ketone (MEK) weregiven to exposed workers. ... No respiratory symptoms or pulmonary function disorders were identifiedin the foundry workers, and MEK was detected in the blood of only one worker at 1.4 ug/ml. ...[NIOSH; Health Hazard Evaluation Report No. HETA-82-280-1407(1984)]**PEER REVIEWED**

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Body Burden:

The kinetics of inhaled methyl ethyl ketone (MEK) in human volunteers was studied in an exposurechamber. Relative pulmonary uptake was about 53% throughout a 4 hr exposure period at 200 ppm.Blood MEK concentration rose steadily until the end of exposure. Repeated bicycle exercise increasedthe overall blood MEK level markedly in comparison to sedentary activity, with transient peaks inassociation with cycling; thus blood MEK concentration depended both on the rate of uptake and theamount taken up. Only 3% of the absorbed dose was excreted unchanged by exhalation. A well knownmetabolite of MEK, 2,3-butanediol, was detected in the urine with maximum rates of excretion at about 6to 12 hr from the beginning of exposure. About 2% of the MEK dose taken up by the lungs was excretedin the urine as 2,3-butanediol. ... Elimination of MEK in blood appeared to exhibit two phases: the initialalpha-phase (T1/2= 30 min; kel alpha= 0.023) over the first post-exposure hour, followed by the terminalbeta-phase (T1/2= 81 min; kel beta= 0.009).[Liira J et al; Int Arch Occup Environ Health 60 (3): 195-200(1988)]**PEER REVIEWED**

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EXPOSURE TO 1500 PPM OF METHYL ETHYL KETONE (MEK) ALONE FOR 7-9 WK DIDNOT CAUSE PARALYSIS BUT DID ELEVATE PLASMA CHOLINESTERASE LEVELS IN MICE,RATS, & CHICKENS.[COURI D ET AL; PROC ANNU CONF ENVIRON TOXICOL, 5TH, AMRL-TR-74-125:109 (1974)]**PEER REVIEWED**



Human Toxicity Excerpts:

A case of contact urticaria (CU) caused by methyl ethyl ketone (MEK) was reported. ... A cotton swabtest with MEK to the normal skin on his forearm caused the skin to turn bright red. The spot was itchy,but no induration or edema was noticed. The reaction reached its maximum after 15 minutes and thengradually faded. The test was repeated after two days with the same results. Application of the samegrade MEK to five medical staff members produced no reaction. ... MEK should be added to the list ofagents that are not only irritants, but can also cause contact urticaria.[Varigos GA, Nurse DS; Contact Dermatitis 15 (4): 259-60 (1986)]**PEERREVIEWED**

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Toxic effects of common organic solvents on workers /were/ examined. The most notable acute effects ofoccupational exposure to organic solvents are /CNS depression/ and other nerve dysfunctions. Thecommon symptoms of short term exposure are fatigue, headache, nausea, sleep disturbance, andalteration in memory. Psychomotor performance of adverse effects on intellectual or memory functionsare demonstrated with psychological test batteries after long-term occupational exposure to organicsolvents. The mutagenic, carcinogenic, and toxicological effects of ... methyl ethyl ketone ... aresummarized. ... In clinical observations, the effects of organic solvents can cause increased excretion ofabnormal cells and protein in urine. This indicates the possible correlation between long-term exposureand renal disease.[Bang KM; Health Hazards in the Occupational Environment 7 (3): 15-29(1984)]**PEER REVIEWED**



Interactions:

IT DOES NOT APPEAR TO BE NEUROTOXIC BY ITSELF, IT POTENTIATES NEUROTOXICITYOF OTHER HEXACARBONS; REPORTED IN HUMANS EXPOSED TO METHYL ETHYLKETONE (MEK) & N-HEXANE.[ALTENKIRCH ET AL; J NEUROL 214: 152 (1977)]**PEER REVIEWED**




METHYL ETHYL KETONE IS IMPLICATED AS THE CAUSE OF RETROBULBAR NEURITISIN PT WHO USED THE SOLVENT IN REMOVING PAINT FROM AN AIRPLANE HANGAR.[BERG EF; ANN OPHTHALMOL 3 (12): 1351 (1971)]**PEER REVIEWED**




Exposure of the forearm for 1 hr/day for 6 consecutive days produced damage to the horny layer of theepithelium. ... Methyl ethyl ketone can defat and partially dehydrate the stratum corneum of human skinwithout producing irritation or inflammation.[Clayton, G.D., F.E. Clayton (eds.) Patty's Industrial Hygiene andToxicology. Volumes 2A, 2B, 2C, 2D, 2E, 2F: Toxicology. 4th ed. NewYork, NY: John Wiley & Sons Inc., 1993-1994. 1767]**PEER REVIEWED**



Metabolism/Metabolites:

Milk cultures of five Leuconostoc dextranicum strains were capable of reducing methyl ethyl ketone(MEK) to 2-butyl alcohol.[Keenan TW; Appl Microbiol 16: 1881-5 (1968)]**PEER REVIEWED**

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Uptake of oxygen by Mycobacterium smegmatis 442, and Corynebacterium sp during metabolism of 1 ulof methyl ethyl ketone (MEK) in Warburg respirometers, was 196 and 266 ul of oxygen respectively.[Lukins HB, Foster JW; J Bacteriol 85: 1076-87 (1963)]**PEERREVIEWED**




GUINEA PIGS WERE GIVEN SINGLE 450 MG/KG IP DOSES OF METHYL ETHYL KETONE(MEK). MEK PRODUCED 2-BUTANOL, 3-HYDROXY-2-BUTANONE, & 2,3-BUTANEDIOL.[DIVINCENZO GD ET AL; TOXICOL APPL PHARMACOL 36 (3): 511 (1976)]**PEERREVIEWED**




HIGH ATM CONCN OF METHYL ETHYL KETONE IS IRRITATING TO THE EYES, NOSE,AND THROAT AND PROLONGED EXPOSURE MAY PRODUCE CNS DEPRESSION ... NOUNTOWARD EFFECTS HAVE BEEN REPORTED FOR CHRONIC EXPOSURE TO LOW CONCN.PROLONGED SKIN CONTACT MAY DEFAT THE SKIN AND PRODUCE DERMATITIS. IFSPLASHED IN THE EYES IT MAY PRODUCE PAINFUL IRRITATION AND CORNEAL INJURY.[Clayton, G.D., F.E. Clayton (eds.) Patty's Industrial Hygiene andToxicology. Volumes 2A, 2B, 2C, 2D, 2E, 2F: Toxicology. 4th ed. NewYork, NY: John Wiley & Sons Inc., 1993-1994. 1748]**PEER REVIEWED**




METHYL ETHYL KETONE (MEK) OCCURS ... IN NORMAL HUMAN URINE & ... HASPOSSIBLE DIETARY ORIGIN; ITS MORE PROBABLE PRECURSOR ISALPHA-METHYLACETOACETIC ACID. LIKE OTHER KETONES ... MEK IS REDUCED ... INTHE BODY. ONLY 30-40% ... IS ELIMINATED IN EXPIRED AIR ... .[Browning, E. Toxicity and Metabolism of Industrial Solvents. NewYork: American Elsevier, 1965. 422]**PEER REVIEWED**



Disposal Methods:

Methyl ethyl ketone is a waste chemical stream constituent which may be subjected to ultimate disposalby controlled incineration.[USEPA; Engineering Handbook for Hazardous Waste Incineration p.2-8(1981) EPA 68-03-3025]**PEER REVIEWED**

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Disposal Methods:

The following wastewater treatment technologies have been investigated for methyl ethyl ketone:solvent extraction and activated carbon.[USEPA; Management of Hazardous Waste Leachate, EPA ContractNo.68-03-2766 p.E-16 (1982)]**PEER REVIEWED**

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An inhalation teratology study was conducted with pregnant Sprague-Dawley rats (25/group) receivingwhole body exposure to methyl ethyl ketone in a dynamic air flow chamber, 7 hours/day on days 6through 15 of gestation. There was no effect of treatment for all animals as indicated by clinicalobservations, absolute or relative liver weights, food consumption, number of pregnancies, and mortality.Maternal toxicity was evident by statistical differences between high dose groups and controls for:maternal body weights, maternal body weight gain and water consumption. The average number of livefetuses per litter, incidence of resorption rates, fetal body weight or crown-rump length were notsignificantly affected by treatment. Significant differences were observed between the fetuses of thecontrol and high dose group for skeletal variations, but no significant external or soft-tissue alterationswere observed in any of the fetuses of treated females.[Dow Toxicology Research Laboratory; Teratologic Evaluation of InhaledMethyl Ethyl Ketone in Rats, (1979), EPA Document No. 878210652, FicheNo. OTS0206178] **UNREVIEWED**



Preventive Measures:

A major concern in the painting studio is solvents, /including methyl ethyl ketone/. ... Precautionsinclude ... use of dilution and local exhaust ventilation, control of storage areas, disposal of solventsoaked rags in covered containers, minimizing skin exposure and the use of respirators and otherpersonal protective equipment. The control of fire hazards is also important, since many of the solventsare highly flammable.[Hart C; J Environ Health 49 (5): 282-6 (1987)]**PEER REVIEWED**

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METHOD IS BASED ON COLOR REACTION OF METHYL ETHYL KETONE WITH VANILLININ CONCN SULFURIC ACID.[TYRAS H ET AL; CHEM ANAL (WARSAW) 21 (3): 647 (1976)]**PEERREVIEWED**



Sampling Procedures:

Activated charcoal, Ambersorb XE-348, and Amberlites XAD-2, XAD-4, and XAD-7 were evaluated assolid adsorbents for work-room air sampling of acetone, methyl ethyl ketone, methyl isobutyl ketone,methyl n-butyl ketone, cyclohexanone and isophorone. Activated charcoal had good capacity for thecompounds investigated, but most ketones decomposed on this adsorbent during storage. AmbersorbXE-348 also showed good capacity for most of the ketones and decomposition was insignificant.[Levin JO, Carleborg L; Ann Occup Hyg 31 (1): 31-8 (1987)]**PEERREVIEWED**

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PORTABLE IR ANALYZERS MATED WITH MICROCOMPUTER ARE SUITABLE FOR ON-SITEMONITORING OF MIXTURES OF METHYL ETHYL KETONE.[SYRJALA R; IND RES 19 (6): 81 (1977)]**PEER REVIEWED**

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RCRA Requirements:

F005; When methyl ethyl ketone is a spent solvent, it is classified as a hazardous waste from anonspecific source (F005), as stated in 40 CFR 261.31, and must be managed according to State and/orFederal hazardous waste regulations.[40 CFR 261.31 (7/1/96)]**PEER REVIEWED**

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TSCA Requirements:

Pursuant to section 8(d) of TSCA, EPA promulgated a model Health and Safety Data Reporting Rule.The section 8(d) model rule requires manufacturers, importers, and processors of listed chemicalsubstances and mixtures to submit to EPA copies and lists of unpublished health and safety studies.Methyl ethyl ketone is included on this list.[40 CFR 716.120 (7/1/96)]**PEER REVIEWED**

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Listed as a hazardous air pollutant (HAP) generally known or suspected to cause serious health problems.The Clean Air Act, as amended in 1990, directs EPA to set standards requiring major sources to sharplyreduce routine emissions of toxic pollutants. EPA is required to establish and phase in specificperformance based standards for all air emission sources that emit one or more of the listed pollutants.Methyl ethyl ketone is included on this list.[Clean Air Act as amended in 1990, Sect. 112 (b) (1) Public Law101-549 Nov. 15, 1990]**QC REVIEWED**

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Groups of rats were exposed to 100 ppm hexane, 200 ppm methyl ethyl ketone (MEK), or fresh air in anexposure chamber 12 hr daily for 24 weeks. Body weight, motor nerve conduction velocity, distal motorlatency, and mixed conduction velocities were measured before exposure and after 4, 8, 12, 16, 20, and24 wk exposure. ... Exposure to 200 ppm MEK significantly increased motor nerve conduction velocity,and mixed conduction velocities and decreased distal motor latency after 4 week exposure; but at a laterstage no significant changes were found. Mixed exposure to 100 ppm hexane and 200 ppm MEKsignificantly decreased distal motor latency after 4 week exposure and decreased motor nerve conductionvelocity and mixed conduction velocities after 20 and 24 week exposure.[Takeuchi Y et al; Br J Ind Med 40 (2): 199-203 (1983)]**PEERREVIEWED**



Other Chemical/Physical Properties:

CONSTANT BOILING MIXTURE WITH WATER, BP 73.4 DEG C, CONTAINS 88.7% METHYLETHYL KETONE (MEK); SOLUBILITY OF WATER IN MEK IS 12.5% @ 25 DEG C[Budavari, S. (ed.). The Merck Index - An Encyclopedia of Chemicals,Drugs, and Biologicals. Whitehouse Station, NJ: Merck and Co., Inc.,1996. 1037]**PEER REVIEWED**

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Intraperitoneal injection of 750, 1500 or 2000 mg/kg methyl ethyl ketone to guinea pigs resulted inelevated serum ornithine carbamyl transferase (OCT) activity at the highest dose, where one of fouranimals died, and deposition of lipids in the liver with either 1500 or 2000 mg/kg was found.[DiVincenzo GD et al; Am Ind Hyg Assoc J 34: 329 (1974)]**PEERREVIEWED**



Acceptable Daily Intakes:

... An Acceptable Daily Intake (ADI), defined as the amount of a chemical to which humans can beexposed on a daily basis over an extended period of time (usually a lifetime) without suffering adeleterious effect, for methyl ethyl ketone is 3.2 mg/day for oral exposure. ...[USEPA; Health and Environmental Effects Profile for Methyl EthylKetone p.80 (1988) EPA/600/X-85/363]**PEER REVIEWED**

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NIOSH has est worker exposure to methyl ethyl ketone at 3,031,000 ...[Sittig, M. Handbook of Toxic and Hazardous Chemicals and Carcinogens,1985. 2nd ed. Park Ridge, NJ: Noyes Data Corporation, 1985. 601]**PEERREVIEWED**



Special Reports:




Interactions:

The effects of acute exposure to toluene and methyl ethyl ketone (MEK) singly and in combinationwere investigated. ... The effects of these chemicals on behavior and body burden were determined. ...MEK had no effect on any measures. Behavior performance was not affected by the combination oftoluene and MEK. Body burden of the two solvents was not additive. ... Neither chemical potentiated theeffect of the other at the concentrations studied.[Dick RB et al; Int Arch Occup Environ Health 54 (2): 91-109(1984)]**PEER REVIEWED**





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A workman splashed his eye accidentally /with methyl ethyl ketone/, but the next day had only slightconjunctival hyperemia and no residual corneal injury. Despite the mildness of the injury, in the next fewdays the affected eye developed severe anterior uveitis triggered by slight trauma.[Grant, W.M. Toxicology of the Eye. 3rd ed. Springfield, IL: CharlesC. Thomas Publisher, 1986. 617]**PEER REVIEWED**




Rats were given a single oral dose of methyl ethyl ketone (MEK). The blood concn of MEK andmetabolites 4 hr after dosing were: MEK (94.1 mg/100 ml); 2-butanol (3.2 mg/100 ml);3-hydroxy-2-butanol (2.4 mg/100 ml) and 2,3-butanediol (8.6 mg/100 ml). Blood concn of the parentcompound and metabolites 18 hr after dosing with MEK were: MEK (6.2 mg/100 ml); 2-butanol (0.6mg/100 ml); 3-hydroxy-2-butanone (1.4 mg/100 ml); and 2,3-butanediol (25.6 mg/100 ml).[Dietz FKJ, Traiger GJ; Toxicology 14: 209-14 (1979)]**PEER REVIEWED**




Workers occupationally exposed to methyl ethyl ketone (MEK) were examined. ... Workers exposed to300 micrograms per liter MEK, the aveolar concn was 30% of the environmental concn. Lung uptakeaveraged 1.05 mg/min. The blood concn of MEK ranged from 842 to 9573 ug/l, with a mean of 2630ug/l. Blood concn of MEK were strongly correlated with alveolar concn. MEK was more soluble in heartand muscle tissue than in lung tissue or fat. Urinary MEK excretion ranged from 120 to 1120 mg/l, witha mean of 487 mg/l. ... MEK was not persistent in the tissues. ... Urinary excretion of MEK andacetylmethylcarbinol are only around 0.1% of MEK lung absorption, the main pathway through whichMEK is eliminated is unknown.[Perbellini L et al; Intern Arch Occup Environ Health 54 (1): 73-81(1984)]**PEER REVIEWED**

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The ability of methyl ethyl ketone to induce specific locus mutations at the TK locus in culturedL5178Y mouse lymphoma cells (Mouse Lymphoma Mutagenicity Assay) was evaluated in the presenceand absence of Aroclor-induced rat liver S9 metabolic activation. Based on preliminary toxicity tests, 10nonactivated cultures treated with 12, 8.9, 6.7, 5.0, 3.8, 2.8, 2.1, 1.6, 1.2 and 0.89ul/ml were cloned,producing a range of 46 - 122% total growth. Ten S9-activated cultures treated with 8.9, 6.7, 5.0, 3.8,2.8, 2.1, 1.6, 1.2, 0.89 and 0.67ul/ml were cloned, producing a range of 30 - 116% total growth. None ofthe cultures that were cloned produced mutant frequencies which were significantly greater than themean mutant frequency of the solvent controls (DMSO, acetone).[Microbiological Associates Inc.; L5178Y TK +/- Mouse LymphomaMutagenicity Assay, Final Report, (1984), EPA Document No. 40-8444072,Fiche No. OTS0507470] **UNREVIEWED**



Special Reports:





32 samples of southern pea seed, Vigna unguiculata, were analyzed for volatiles. Methyl ethyl ketone(MEK) was found in all samples and the mean concn was 151 + or - 80 ppb (74 to 390 ppb).[Fisher GS et al; J Agric Food Chem 27: 7-11 (1979)]**PEER REVIEWED**

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Environmental Bioconcentration:

An estimated BCF value of 1 was calculated for methyl ethyl ketone(SRC), using an experimental logKow of 0.29(1) and a recommended regression-derived equation(2). According to a classificationscheme(3), this BCF value suggests that bioconcentration in aquatic organisms is low(SRC).[(1) Hansch C et al; Exploring QSAR Hydrophobic, Electronic andStearic Constants Washington DC: Amer Chem Soc (1995) (2) Lyman WJ etal; Handbook of Chemical Property Estimation Methods. Washington DC:Amer Chem Soc pp. 5-4, 5-10 (1990) (3) Franke C et al; Chemosphere 29:1501-14 (1994)]**PEER REVIEWED**

http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:1:bioc~0 [21/04/2001 9:12:56 AM]



A method is described for the determination of the concn of methyl ethyl ketone and its metabolites:2-butanol, 3-hydroxy-2-butanone, and the meso- and d,l-isomers of 2,3-butanediol in urine. The analyteswere isolated from urine by solid-phase extraction and analyzed by capillary gas chromatography. Therecovery rates were 50-70% for the 2,3-butanediol isomers and 88-96% for the other analytes. Theprecision of the method ranged 5-12% (standard deviation %). The detection limit was 1.0 and 1.4 mg/lfor meso- and d,l 2,3-butanediol, respectively, and ranged 0.1-0.15 mg/l for the other analytes.[Kezic S, Monster AC; J Chromatogr 428 (2): 275-80 (1988)]**PEERREVIEWED**

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EPA Method 8015: Nonhalogenated Volatile Organics. For the analysis of solid waste, a representativesample (solid or liquid) is collected in a standard 40 ml glass screw-cap VOA vial equipped with aTeflon-faced silicone septum. Sample agitation, as well as contamination of the collected sample withair, must be avoided. Two VOA vials are filled per sample location, then placed in separate plastic bagsfor shipment and storage. Samples can be analyzed by direct injection or purge-and trap gaschromatography. A temperature program is used in the gas chromatograph to separate the organiccompounds. Column 1 is an 8 ft by 0.1 in ID stainless steel or glass column packed with 1% SP-1000 onCarbopack-B 60/80 mesh or equivalent. Column 2 is a 6 ft by 0.1 in ID stainless steel or glass columnpacked with n-octane on Porasil-C 100/120 mesh (Durapak) or equivalent. Detection is achieved by aflame ionization detector (FID). Under the prescribed conditions, methyl ethyl ketone can be detectedusing this method. No statistical analysis was determined; specific method performance information willbe provided as it becomes available.[USEPA/Office of Solid Waste (OSW); Test Methods for Evaluating SolidWaste, Physical/Chemical Methods SW846 Methods (1986)]**PEERREVIEWED**




Methyl ethyl ketone (MEK) is readily oxidized by microorganisms in activated sludge followingselection and/or adaptation, with over 80% being removed in 24 hr. Metabolism in unacclimated sludgesis slow.[USEPA; Methyl Ethyl Ketone III: Exposure Aspects USEPA Contract No.68-01-6147 (1981)]**PEER REVIEWED**

http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:1:biod~0 [21/04/2001 9:13:00 AM]


Natural Pollution Sources:

Methyl ethyl ketone occurs naturally as a metabolic byproduct of plants and animals and is released intothe atmosphere by volcanoes and forest fires(1).[(1) Graedel TE et al; Atmospheric Chemical Compounds. NY,NY: AcademicPress p. 263 (1986)]**PEER REVIEWED**

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Mechanism of Action:

The effects of the solvents n-hexane, butanone (methyl ethyl ketone, MEK) and a mixture of both inthe intrapulmonary nerve system of rats were studied by light and electron microscopy. The alteration inthe fine structures of the tissue consisted in a disseminated swelling of axons due to a strikingmultiplication of neurofilaments. Nonspecific axonal alterations could be demonstrated as well. Thelatter consisted in clusters of phospholipid material within the axoplasm of nerve fibers and thecytoplasm of Schwann cells plus an accumulation of glycogen granules in the axoplasm. Additionally,single degenerative changes of Schwann cells were observed. An enzyme associated metabolic damagewith a concomitant impairment of axonal flow is discussed as a possible underlying pathomechanism.[Schmidt R et al; Respiration 46 (4): 362-9 (1984)]**PEER REVIEWED**

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Biological Half-Life:

Guinea pigs were given a single dose of methyl ethyl ketone (MEK) ip at 450 mg/kg. Blood sampleswere taken via cardiac puncture at 1, 2, 4, 6, 8, 12 and 16 hr after dosing. Serum half-life of MEK wasestimated at 270 minutes.[Divincenzo GD et al; Toxicol Appl Pharm 36: 511-22 (1976)]**PEERREVIEWED**

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Resting cells of Lactobacillus brevis 24 reduced methyl ethyl ketone (MEK) quantitatively to 2-butylalcohol when incubated in phosphate buffer for 24 hr at 30 deg C.[Keen AR et al; J Dairy Res 41: 249-57 (1974)]**PEER REVIEWED**




The ability of methyl ethyl ketone to cause chromosome aberrations was evaluated in cultured rat (strainnot reported) liver cell line. Based on preliminary toxicity determinations, rat liver cultures were exposedto 250, 500 or 1000 ug/ml and incubated for 24 hours. Two hours prior to the end of incubation,colcemid was added and at the end of incubation period 100 cells from each culture were analyzed. Noincrease (statistical analysis not reported) in the frequency of chromatid gaps, chromatid breaks or totalchromatid aberrations were observed in any of the cultures.[Sittingbourn Research Center; Toxicity Studies with ChemicalSolvents: Short Term In Vitro Tests for Genotoxic Activity with MethylEthyl Ketone, (1982), EPA Document No. 878210125, Fiche No. OTS0206206] **UNREVIEWED**



Hazardous Reactivities & Incompatibilities:

MIXING METHYL ETHYL KETONE & CHLOROSULFONIC ACID OR OLEUM IN A CLOSEDCONTAINER CAUSED THE TEMP & PRESSURE TO INCR.[McEvoy G.K. (ed.). American Hospital Formulary Service-DrugInformation 96. Bethesda, MD: American Society of Health-SystemPharmacists, Inc. 1996 (Plus Supplements).,p. 491M-90]**PEERREVIEWED**

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Cleanup Methods:

The Hazardous Materials Technical Center (HMTC), an EPA emergency response cleanup servicescontractor cleaned up a methyl ethyl ketone (MEK) spill and decontaminated the groundwater. The spillcleanup involved removing low concentrations of MEK from groundwater. The spill was caused by anoverturned tank truck containing 7200 gallons of MEK. MEK was directed into four dry wells thatserved as primary storm drainage. Immediately after the incident, 6000 gallons of water were pumpedfrom the dry well; 2400 gallons of MEK were recovered from the water. About 1500 gallons of MEKwere removed from the truck, and the remaining 3300 gallons of MEK either vaporized or entered anunsaturated zone. MEK concentrations up to 2200 mg/l were reduced to 50 ug/l before reinjection.Levels of MEK in the sample wells, production wells, and reinjection wells were reduced tonondetectable levels.[Halvorsen F, Ohneck R; Proceedings of the National Conference onHazardous Wastes and Environmental Emergencies p.193-95 (1985)]**PEERREVIEWED**

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Allowable Tolerances:


http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:1:atol~0 [21/04/2001 9:13:11 AM]



Pregnant rats inhaled 0, 400, 1000, or 3000 ppm of methyl ethyl ketone for 7 hr/day on days 6-15 ofgestation. Maternal toxicity evidenced by decreased weight gain and increased water consumption wasseen among rats exposed to 3000 ppm. Fetotoxicity (increased incidence of 2 minor skeletal variants)was observed among litters of rats exposed to 3000 ppm.[Deacon MM et al; Toxicol Appl Pharmacol 59 (3): 620-2 (1981)]**PEERREVIEWED**




The mutagenicity of methyl ethyl ketone (MEK) was evaluated in bacterial tester strains E. coli WP2and WP2uvrA and Salmonella TA98, TA100, TA1535, TA1537 and TA1538, and the yeastSaccharomyces cerevisiae tester strain JD1, both in the presence and absence of added metabolicactivation by Aroclor-induced rat liver S9 fraction. Based on preliminary bacterial toxicitydeterminations, MEK, diluted with DMSO, was tested for mutagenicity at concentrations up to 4000ug/plate in the bacterial tests and 5000 ug/plate in the yeast tests using the agar overlay method. MEKdid not cause a positive response in any of the bacterial tester strains, either with or without metabolicactivation.[Shell Sittingbourne Research Centre; Toxicity Studies with ChemicalSolvents: Short-Term in Vitro Tests for Genotoxic Activity with MethylEthyl Ketone. (1982), EPA Document No. 878210125, Fiche No.OTS0206206] **UNREVIEWED**



Artificial Pollution Sources:

Methyl ethyl ketone's production and use as a solvent for coatings, resins, rubbers, plastics,pharmaceuticals, adhesives and rubber cements(1-3) will result in its release to the environment throughvarious waste streams(SRC). Its use as a starting material or intermediate in the manufacture of chemicalproducts(2,3) will also lead to its release to the environment(SRC).[(1) Budvari S; Merck Index, 12th ed, Whitehouse Station,NJ: Merck &Co. p. 1773 (1996) (2) Browning E; Toxicity and Metabolism ofIndustrial Solvents. NY,NY: American Elsevier (1965) (3) Lewis RJ Sred; Hawley's Condensed Chemical Dictionary. 12th ed NY,NY: VanNostrand Rheinhold Co p. 768 (1993)]**PEER REVIEWED**

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Human Health Effects:

Evidence for Carcinogenicity:

CLASSIFICATION: D; not classifiable as to human carcinogenicity. BASIS FOR CLASSIFICATION:Based on no human carcinogenicity data and inadequate animal data. HUMAN CARCINOGENICITYDATA: None. ANIMAL CARCINOGENICITY DATA: Inadequate.[U.S. Environmental Protection Agency's Integrated Risk InformationSystem (IRIS) on methyl ethyl ketone (78-93-3) Available from:http://www.epa.gov/ngispgm3/iris on the Substance File List as ofMarch 15, 2000]**PEER REVIEWED**



... WORKERS EXPOSED TO 300-500 PPM COMPLAINED OF HEADACHE, IRRITATION, ANDNAUSEA. EXPOSURES TO 700 PPM LED TO NO PERMANENT UNTOWARD EFFECTS.MOMENTARY EXPOSURE TO 33,000 AND 100,000 PPM PRODUCED INTOLERABLEIRRITATION OF THE EYES, NOSE, AND THROAT.[Clayton, G. D. and F. E. Clayton (eds.). Patty's Industrial Hygieneand Toxicology: Volume 2A, 2B, 2C: Toxicology. 3rd ed. New York: JohnWiley Sons, 1981-1982. 4730]**PEER REVIEWED**

SHORT EXPOSURE OF WORKERS TO 500 PPM ... IN AIR PROVOKED NAUSEA ANDVOMITING ... SEVERAL CASES OF PERIPHERAL NEUROPATHY ... OBSERVED /AFTER/ACUTE PROLONGED OR REPEATED EXPOSURE. NEUROPATHY IS USUALLYSYMMETRICAL, PAINLESS WITH SENSORY LESIONS PREDOMINATING; IT MAY INVOLVEUPPER OR LOWER LIMBS; IN SOME CASES THE FINGERS HAVE BEEN AFFECTEDFOLLOWING IMMERSION ... IN THE LIQUID. DERMATITIS ... REPORTED AFTERIMMERSION IN THE LIQUID AND AFTER EXPOSURE TO CONCN VAPORS. /KETONES/[International Labour Office. Encyclopedia of Occupational Health andSafety. Vols. I&II. Geneva, Switzerland: International Labour Office,1983. 1171]**PEER REVIEWED**

METHYL ETHYL KETONE IS IMPLICATED AS THE CAUSE OF RETROBULBAR NEURITISIN PT WHO USED THE SOLVENT IN REMOVING PAINT FROM AN AIRPLANE HANGAR.

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[BERG EF; ANN OPHTHALMOL 3 (12): 1351 (1971)]**PEER REVIEWED**





... Has a low toxicity following both acute and chronic exposures.[Clayton, G.D., F.E. Clayton (eds.) Patty's Industrial Hygiene andToxicology. Volumes 2A, 2B, 2C, 2D, 2E, 2F: Toxicology. 4th ed. NewYork, NY: John Wiley & Sons Inc., 1993-1994. 1748]**PEER REVIEWED**

HIGH ATM CONCN ... ARE IRRITATING TO THE EYES, NOSE, AND THROAT ANDPROLONGED EXPOSURE MAY PRODUCE CNS DEPRESSION ... NO UNTOWARD EFFECTSHAVE BEEN REPORTED FOR CHRONIC EXPOSURE TO LOW CONCN. PROLONGED SKINCONTACT MAY DEFAT THE SKIN AND PRODUCE DERMATITIS. IF SPLASHED IN THE EYESIT MAY PRODUCE PAINFUL IRRITATION AND CORNEAL INJURY.[Clayton, G.D., F.E. Clayton (eds.) Patty's Industrial Hygiene andToxicology. Volumes 2A, 2B, 2C, 2D, 2E, 2F: Toxicology. 4th ed. New


York, NY: John Wiley & Sons Inc., 1993-1994. 1748]**PEER REVIEWED**

To determine whether unchanged solvent urinary concentration could be used as a biological exposureindex, workers occupationally exposed to various solvents were studied. Nine unrelated groups (a total of659 males) working in plastic boat, chemical, plastic button, paint, and shoe factories were studied. Urinesamples were collected at the beginning of the workshift and at the end of the first half of the shift. Aclose relationship (correlation coefficient always above 0.85) between the average environmental solventconcentration (mg/cu m) measured in the breathing zone and the urinary concentration of unchangedsolvent (ug/l) was observed.[Ghittori S et al; Am Ind Hyg Assoc J 48 (9): 786-90 (1987)]**PEERREVIEWED**

... Seventy healthy male and female volunteers, 18 to 32 years old, with no previous prolonged exposureto solvents were exposed to 0 or 250 ppm acetone, 200 ppm MEK, or 125 ppm acetone plus 100 ppmMEK vapors for 4 hours in an exposure chamber. Expired air samples were collected before exposure,after 2 and 4 hours exposure, 90 minutes after exposure ended, and the next morning. Blood sampleswere collected on the day preceding exposure, at 2 or 4 hours of exposure, 2 hours after exposure ended,and the following day. Samples were analyzed for acetone and MEK by gas or gas/liquidchromatography. ... Blood MEK or acetone concentrations continued to increase throughout exposure,the increases between 2 and 4 hours being larger in the case of acetone. Acetone concentrations in thebreath took longer to decrease than those of MEK. No interactive effects were noted in the combinedexposures. Blood acetone and MEK concentrations were moderately correlated with their breathconcentrations. Blood MEK and acetone concentrations tended to be lower in female subjects than inmales; however, the differences were significant only for acetone in the combination exposure after 2hours exposure and 90 minutes postexposure. ...[Brown WD et al; The Changing Nature of Work and Workforce,Proceedings of the Third Joint US-Finish Science Symposium p.111-14(1986)]**PEER REVIEWED**

A 47-yr old woman inadvertently ingested an unknown amt of MEK and was found unconscious,hyperventilating, and suffering from severe metabolic acidosis. Her plasma concn of MEK was 950mg/L. She responded promptly to an infusion of sodium hydrogen carbonate and was discharged fromthe hospital after a wk. The metabolic effects of MEK ingestion by humans are not well characterizedand it is uncertain that the acidosis was produced by MEK.[WHO; Environ Health Criteria 143: Methyl Ethyl Ketone p.81(1993)]**PEER REVIEWED**

... exposure to 266-797 mg/cu m (90-270 ppm) for up to 4 hr/day caused his subjects to underestimatetimes of 5 to 30 sec ... on the other hand, found that a 4-hr exposure of human subjects to 590 mg/cu m(200 ppm) had no significant effect in a variety of behavioral test. These included psychomotor, visualvigilance, dual task, sensorimotor and psychological tests. Solvent mixtures of 295 mg MEK/cu m (100ppm) and 298 mg acetone/cu m (125 ppm) similarly had no significant effect on the results of thesebehavioral tests.[WHO; Environ Health Criteria 143: Methyl Ethyl Ketone p.81(1993)]**PEER REVIEWED**

MEK (0.1 mL) rubbed into volar forearm skin daily for 18 days and left uncovered did not produce


persistent erythema or swelling ... A 5-min contact with 1.5 mL of analytical grade MEK confined to a20-mm circle on the forearm produced a temporary whitening of the skin, but no visible erythema,alteration in cutaneous blood flow or other indication of irritation to the skin ... .[WHO; Environ Health Criteria 143: Methyl Ethyl Ketone p.81(1993)]**PEER REVIEWED**

Long-term exposure of 51 Italian workers to MEK produced indications of neurotoxicity with slightly,but not significantly, reduced nerve conduction velocities and various other symptoms such as headache,loss of appetite and weight, GI upset, dizziness, dermatitis and muscular hypotrophy, but no clinicallyrecognizable neuropathy. ... There has been a brief report of chronic exposure of American workers, in afactory producing coated fabric, to 885-1770 mg MEK/cu m (300-600 ppm) in the apparent absence ofother solvents. ... Workers complained of dermatoses and numbness of fingers and arms.[WHO; Environ Health Criteria 143: Methyl Ethyl Ketone p.82(1993)]**PEER REVIEWED**

In a historical prospective morality study of 446 male workers in two MEK dewaxing plants, with anaverage follow up of 13.9 years, the observed deaths (46) were below the expected (55.51). There was aslight deficiency of deaths from neoplasms (13 observed; 14.26 expected) but there was a significant incrof deaths from tumors of the buccal cavity and pharynx (2 observed; 0.13 expected). However, therewere significantly fewer deaths from lung cancer (1 observed; 6.02 expected). In view of the smallnumbers, it was concluded that there was no clear evidence of cancer hazard in these workers ... .[WHO; Environ Health Criteria 143: Methyl Ethyl Ketone p.89(1993)]**PEER REVIEWED**

The application of MEK to the forearm skin of two volunteers for 1 hr/day on six successive daysdamaged only the stratum corneum and that the dermal toxicity was similar to ethanol. Opdyke indicatedthat the application of 20 percent MEK in petrolatum to human forearm skin for 48 hr did not cause anyirritation and that no sensitization reactions occurred when the same concentration was tested on 24volunteers.[Clayton, G.D., F.E. Clayton (eds.) Patty's Industrial Hygiene andToxicology. Volumes 2A, 2B, 2C, 2D, 2E, 2F: Toxicology. 4th ed. NewYork, NY: John Wiley & Sons Inc., 1993-1994. 1767]**PEER REVIEWED**

Two cases of acute poisoning in a raincoat manufacturing operation where the seams were waterproofedwith a resin dissolved in either acetone or MEK were reported. Samples of the workroom air indicatedthat the MEK concentration ranged from 398 to 561 ppm, whereas the acetone concentration ranged from330 to 495 ppm. Two female employees were reportedly affected by the solvent vapors on differentoccasions. The first complained of stomach distress and watery eyes one morning, and later was foundunconscious in a rest room. The employee had a strong acetone odor on her breath, but no acetonuriaupon admission to the local hospital. She was treated with a CNS stimulant and awoke immediately, butcomplained of a severe headache. The patient was discharged from the hospital on the day followingadmission. The second case followed the first one by 1 day and was apparently less severe. Theindividual fainted and convulsed at the work site but regained consciousness immediately afterwards. Atthe hospital she was confused and had a headache, but after 1 hr of observation she was allowed to returnhome.[Clayton, G.D., F.E. Clayton (eds.) Patty's Industrial Hygiene andToxicology. Volumes 2A, 2B, 2C, 2D, 2E, 2F: Toxicology. 4th ed. New



A case study where a male patient attempted suicide by ingesting approximately 100 ml of an adhesivecement that contained 39 percent cyclohexanone, 28% MEK, 18% acetone was presented. The individualreportedly drank about 720 ml of sake (10 percent ethanol) 30 min prior to drinking the adhesivesolution. The patient was unconscious when taken to a hospital about 2 hr after the ingestion of thesolvent mixture. Gastric lavage, plasma exchange, and charcoal hemoperfusion were all performed, andthe patient regained consciousness about 7 hr after ingestion; however, signs of systemic toxicitypersisted. High blood concentrations of a cyclohexanone metabolite (cyclohexanal) were thought to beresponsible for the coma, whereas the hyperglycemia was attributed to acetone.[Clayton, G.D., F.E. Clayton (eds.) Patty's Industrial Hygiene andToxicology. Volumes 2A, 2B, 2C, 2D, 2E, 2F: Toxicology. 4th ed. NewYork, NY: John Wiley & Sons Inc., 1993-1994. 1767]**PEER REVIEWED**

A case of retrobulbar neuritis in a sailor who was using large quantities of MEK as a paint remover wasreported. The affected individual complained of blurred vision, light-headedness, and nausea after beingexposed to MEK vapor for 1.5 hr. Upon admission to a military hospital, the patient's near- and far-fieldvisual acuity was reduced and blind spots were markedly enlarged when a white target was viewed. Anophthalmoscopic examination, however, did not reveal any abnormalities. Clinical testing on the day ofadmission revealed elevations in blood methanol and formaldehyde. Visual acuity returned to normalwithin 2 days of admission; however, the blood methanol levels did not return to normal until the sixthday of hospitalization. /It was/ concluded that MEK was the causative agent for the optic nerve damagethat was observed. The MEK was assumed to have been systemically absorbed both dermally andthrough the lungs and then partially metabolized to methanol, which subsequently affected the opticnerve and cerebral cortex.[Clayton, G.D., F.E. Clayton (eds.) Patty's Industrial Hygiene andToxicology. Volumes 2A, 2B, 2C, 2D, 2E, 2F: Toxicology. 4th ed. NewYork, NY: John Wiley & Sons Inc., 1993-1994. 1767]**PEER REVIEWED**

A case of toxic encephalopathy with dementia and cerebellar ataxia in a 38-year-old male whospray-painted a truck in an unventilated garage with a paint that contained toluene, MEK, and propyleneglycol. As time passed following the exposure, the individual began to experience memory problemsalong with headaches, shortness of breath, appetite and sleep disturbances, ataxia, and suicidaldepression. Neuropsychological evaluations over a 2.5 year period revealed distinct cognitive, motor, andbehavioral changes.[Clayton, G.D., F.E. Clayton (eds.) Patty's Industrial Hygiene andToxicology. Volumes 2A, 2B, 2C, 2D, 2E, 2F: Toxicology. 4th ed. NewYork, NY: John Wiley & Sons Inc., 1993-1994. 1769]**PEER REVIEWED**

The pharmacokinetics of MEK in 70 male and female volunteers following a 4-hr inhalation exposureeither alone (200 ppm) or in combination with acetone (225 ppm, 1:1.25 ratio) was described. Blood andexpired air elimination data for the MEK-exposed individuals revealed on average that (1) MEKsteady-state breath levels of about 10 to 12 ppm were attained, (2) non-steady-state peak blood levels of3 to 4 ug/ml occurred, (3) no significant difference in uptake or elimination was observed for males andfemales, and (4) no appreciable interaction affecting elimination took place with the combinedexposures.[Clayton, G.D., F.E. Clayton (eds.) Patty's Industrial Hygiene and


Toxicology. Volumes 2A, 2B, 2C, 2D, 2E, 2F: Toxicology. 4th ed. NewYork, NY: John Wiley & Sons Inc., 1993-1994. 1769]**PEER REVIEWED**

Skin, Eye and Respiratory Irritations:

High atm concn ... are irritating to the eyes, nose, and throat ... .[Clayton, G.D., F.E. Clayton (eds.) Patty's Industrial Hygiene andToxicology. Volumes 2A, 2B, 2C, 2D, 2E, 2F: Toxicology. 4th ed. NewYork, NY: John Wiley & Sons Inc., 1993-1994. 1748]**PEER REVIEWED**

Vapor is irritating to human mucous membranes and conjuntivae @ 200 ppm after 15 min ... .[Gosselin, R.E., R.P. Smith, H.C. Hodge. Clinical Toxicology ofCommercial Products. 5th ed. Baltimore: Williams and Wilkins, 1984.,p.II-185]**PEER REVIEWED**



Artificial leather workers /are at risk of exposure/.[Arena, J.M. and Drew, R.H. (eds.) Poisoning-Toxicology, Symptoms,Treatments. 5th ed. Springfield, IL: Charles C. Thomas Publisher,1986. 358]**PEER REVIEWED**




Body Burden:

Detected in 5 of 8 samples of mother's milk from 4 USA urban areas.[(1) Pellizzari ED et al; Bull Environ Contam Toxicol 28: 322-8(1982)]**PEER REVIEWED**








Clinical Effects:


SUMMARY OF EXPOSURE 0.2.1.1 ACUTE EXPOSURE o ACUTE EXPOSURE (ORAL) - Most available information concerns inhalational or dermal exposure. A few cases involving ingestion of methyl ethyl ketone (and co-ingestants) or ketone peroxide (with co-ingestants) have resulted in CNS depression, respiratory depression or corrosive effects and sequelae. o ACUTE INHALATION - The effects vary, depending on extent and duration of exposure. Eye, nose and throat irritation, nausea, headache, vertigo, incoordination, CNS depression, narcosis and cardiorespiratory failure can occur. In most cases, recovery is usually rapid and complete. o CHRONIC EXPOSURE - The major concern with chronic exposure is axonal neuropathy with secondary myelin damage; usually manifested as paresthesias and muscle weakness. Only six-carbon, linear chain ketones metabolized to gamma-diketones (such as methyl n-butyl ketone) are implicated. o EYE EXPOSURE - Splash contact causes irritation, which may be slight, moderate, or severe, depending on the ketone. Vapors can cause irritation and lacrimation. o ROUTES OF EXPOSURE - Ketones are absorbed by ingestion, inhalation, and dermal exposure. o RELATED COMPOUNDS - Exposure to ketone solvents (methyl ethyl ketone, methyl isobutyl ketone, etc) must be distinguished from exposure to the peroxides of these same ketones. KETONE PEROXIDES are highly reactive and corrosive. Management of ketone peroxide exposure is discussed in a separate document. HEENT 0.2.4.1 ACUTE EXPOSURE o Splash contact causes irritation, which may be slight, moderate, or severe, depending on the specific ketone; vapors may cause irritation and lacrimation. CARDIOVASCULAR 0.2.5.1 ACUTE EXPOSURE o Tachycardia may occur. RESPIRATORY 0.2.6.1 ACUTE EXPOSURE o Ingestion of significant amounts may cause respiratory depression. Inhalation exposure may produce an anesthetic type of respiratory depression, dyspnea, and


gasping. Pulmonary aspiration may result in chemical pneumonitis. NEUROLOGIC 0.2.7.1 ACUTE EXPOSURE o Acute inhalation exposure causes a progression of CNS effects, from headache, vertigo, incoordination, narcosis, dizziness, and tremor, to coma. Peripheral neuropathy has been reported following exposure to methyl-n-butyl ketone and 2,5-hexanedione. Trimethylnonanone is not associated with narcosis. o Chronic exposure causes axonal neuropathy with secondary myelin damage, usually manifested as paresthesias and muscle weakness. Only six-carbon, linear chain ketones metabolized to gamma-diketones (such as methyl n-butyl ketone) are implicated. GASTROINTESTINAL 0.2.8.1 ACUTE EXPOSURE o Nausea and vomiting may occur. HEPATIC 0.2.9.1 ACUTE EXPOSURE o Ketones may potentiate the hepatotoxicity of halogenated hydrocarbons. They may also inhibit aromatic hydrocarbon metabolism. ACID-BASE 0.2.11.1 ACUTE EXPOSURE o Metabolic acidosis has been reported. DERMATOLOGIC 0.2.14.1 ACUTE EXPOSURE o Skin exposure to the liquid or vapor may result in dermatitis and paresthesias of affected areas. Contact urticaria has also been reported. REPRODUCTIVE HAZARDS o Limited studies have generally documented little or no effect of ketones on reproduction in experimental animals. Human data is lacking. 2,5-Hexanedione has an effect on spermatogenesis in male experimental animals. CARCINOGENICITY 0.2.21.1 IARC CATEGORY o The ketones are generally unclassified by IARC. Those agents evaluated by IARC have been classified as having insufficient evidence to determine human carcinogenicity. 0.2.21.2 HUMAN OVERVIEW o No adequate human studies exist for the agents in this category. 0.2.21.3 ANIMAL OVERVIEW


o Experimental animal studies are limited, but are generally negative, and agents in this group have little mutagenic activity. GENOTOXICITY o Extremely limited data is available for this class of agents. For many specific ketones, no data is available. Some studies report positive findings, but this category of agents appears to be generally non-mutagenic or only weakly mutagenic.

Laboratory:


Treatment Overview:

ORAL EXPOSURE o With ingestion of small amounts the major concern is pulmonary aspiration and gastrointestinal decontamination is not recommended. With ingestion of large amounts there is potential for systemic toxicity from gastrointestinal absorption and GI decontamination is suggested, keeping in mind that pulmonary aspiration is still a concern. o If the patient is obtunded, seizing, or has significant alterations in mental status, a cuffed endotracheal tube should be inserted prior to gastric aspiration. 1. For moderate ingestions (less than 100 milliliters) activated charcoal alone is recommended. 2. For large ingestions that have occurred within the past hour, careful gastric aspiration followed by activated charcoal is recommended. a. The lavage tube should be flexible, well lubricated with a water soluble gel to minimize gagging and vomiting, and of a large enough diameter to minimize vomiting of gastric contents around the tube and potential pulmonary aspiration. b. After the tube is in place, evacuate gastric contents rapidly. Repeated instillation of fluid to wash out the stomach is NOT suggested as it probably does not significantly enhance the removal of liquids and may enhance the potential for pulmonary aspiration. c. Instill activated charcoal prior to withdrawing the tube. d. For ingestions that have occurred more than 2 hours


ago, gastric decontamination is not likely to be of benefit and is generally not warranted. o Administer activated charcoal for moderate or large ingestions. 1. ACTIVATED CHARCOAL: Administer charcoal as slurry (240 mL water/30 g charcoal). Usual dose: 25 to 100 g in adults/adolescents, 25 to 50 g in children (1 to 12 years), and 1 g/kg in infants less than 1 year old. o ACIDOSIS - Correct severe acidosis (pH < 7.1) with intravenous sodium bicarbonate. About 1 to 2 milliequivalents/kilogram is a useful starting dose. Monitor arterial blood gases to guide bicarbonate therapy. INHALATION EXPOSURE o DECONTAMINATION: Move patient to fresh air. Monitor for respiratory distress. If cough or difficulty in breathing develops, evaluate for respiratory tract irritation, bronchitis, or pneumonitis. Administer 100 percent humidified supplemental oxygen with assisted ventilation as required. EYE EXPOSURE o DECONTAMINATION: Exposed eyes should be irrigated with copious amounts of tepid water for at least 15 minutes. If irritation, pain, swelling, lacrimation, or photophobia persist, the patient should be seen in a health care facility. DERMAL EXPOSURE o DECONTAMINATION: Wash exposed area extremely thoroughly with soap and water. A physician may need to examine the area if irritation or pain persists. o Treat dermal irritation or burns with standard topical therapy. Patients developing dermal hypersensitivity reactions may require treatment with systemic or topical corticosteroids or antihistamines.

Range of Toxicity:




Antidote and Emergency Treatment:

For immediate first aid: Ensure that adequate decontamination has been carried out. If victim is notbreathing, start artificial respiration, preferably with a demand-valve resuscitator, bag-valve-mask device,or pocket mask as trained. Perform CPR if necessary. Immediately flush contaminated eyes with gentlyflowing water. Do not induce vomiting. If vomiting occurs, lean patient forward or place on left side(head-down position, if possible) to maintain an open airway and prevent aspiration. Keep victim quietand maintain normal body temperature. Obtain medical attention. /Ketones and related compounds/[Bronstein, A.C., P.L. Currance; Emergency Care for HazardousMaterials Exposure. 2nd ed. St. Louis, MO. Mosby Lifeline. 1994.237]**PEER REVIEWED**

For basic treatment: Establish a patent airway. Suction if necessary. Watch for signs of respiratoryinsufficiency and assist ventilations if necessary. Administer oxygen by nonrebreather mask at 10 to 15L/min. Monitor for pulmonary edema and treat if necessary. ... For contamination, flush eyesimmediately with water. Irrigate each eye continuously with normal saline during transport. ... Do not useemetics. For ingestion, rinse mouth and administer 5 mL/kg up to 200 mL of water for dilution if thepatient can swallow, has a strong gag reflex, and does not drool. Administer activated charcoal ... ./Ketones and related compounds/[Bronstein, A.C., P.L. Currance; Emergency Care for HazardousMaterials Exposure. 2nd ed. St. Louis, MO. Mosby Lifeline. 1994.237]**PEER REVIEWED**

Animal Toxicity Studies:




THE SINGLE DOSE ORAL TOXICITY ... HAS BEEN DETERMINED TO BE 3.3 G/KG ... FORRATS. MASSIVE DOSES MAY BE EXPECTED TO RESULT IN IRRITATION OF THE LUNG & .../CNS DEPRESSION/.[Patty, F. (ed.). Industrial Hygiene and Toxicology: Volume II:Toxicology. 2nd ed. New York: Interscience Publishers, 1963.


1732]**PEER REVIEWED**

Guinea pigs exposed to 3300 ppm for 13.5 hr showed no signs of intoxication. Exposure to 10,000 ppmfor a similar period produced irritation of the eyes and nose within 4 min and /CNS depression/ between4-5 hr. Exposure to 33,000 ppm for 200 min produced /CNS depression/ and death. Exposure to 100,000ppm for 45-55 min produced /CNS depression/ after 10 min.[Clayton, G.D., F.E. Clayton (eds.) Patty's Industrial Hygiene andToxicology. Volumes 2A, 2B, 2C, 2D, 2E, 2F: Toxicology. 4th ed. NewYork, NY: John Wiley & Sons Inc., 1993-1994. 1753]**PEER REVIEWED**

Exposure /of rats/ to 2000 ppm /for 2 hr/ showed no apparent toxicity. Exposure to 8000 ppm killed 3 of6 rats in 8 hr, while 16,000 ppm for 1 hr caused death of all the animals.[Clayton, G.D., F.E. Clayton (eds.) Patty's Industrial Hygiene andToxicology. Volumes 2A, 2B, 2C, 2D, 2E, 2F: Toxicology. 4th ed. NewYork, NY: John Wiley & Sons Inc., 1993-1994. 1753]**PEER REVIEWED**


ANALYSIS OF PORPHYRIN CONTENT OF MURINE ERYTHROLEUKEMIA (MEL) CELLSINCUBATED WITH 2-BUTANONE SHOWED THAT INCR HEMOGLOBIN SYNTH WASACCOMPANIED BY ACCUM OF PORPHYRINS.[EBERT PS ET AL; CHEM BIOL INTERACT 36 (1): 61 (1981)]**PEERREVIEWED**



METHYL ETHYL KETONE WAS EVALUATED FOR EFFECTS ON A DELAYED MATCH TOSAMPLE DISCRIMINATION TASK IN THE JUVENILE BABOONS. THE ANIMALS WEREEXPOSED TO HALF THE THRESHOLD LIMIT VALUE (245 MG/CU M) FOR 24 HR PER DAYDURING A 7 DAY PERIOD. EACH EXPOSURE CONDITION AFFECTED ACCURACY OFPERFORMANCE MINIMALLY BUT RESULTED IN INCREASED AND DECREASED EXTRARESPONSES DURING THE DELAY INTERVALS.[GELLER I; PHARMACOL BIOCHEM BEHAV 11 (4): 401-6 (1979)]**PEER


REVIEWED**



Mutagenicity screening in Escherichia coli WP2, and Salmonella typhimurium strains TA1535, TA1537,TA1536 and TA1538 was negative.[Smirasu Y; J Environ Poll Control 12: 407 (1976)]**PEER REVIEWED**




Vapors in concn of 1000 ppm or 3000 ppm were embryotoxic and fetotoxic in rats causing acaudia,imperforate anus, and brachygnathia, as well as retardation of fetal development.[Gosselin, R.E., R.P. Smith, H.C. Hodge. Clinical Toxicology ofCommercial Products. 5th ed. Baltimore: Williams and Wilkins, 1984.,p.II-185]**PEER REVIEWED**

Testing of a drop on rabbit eyes indicates moderate reversible injury, graded 5 on a scale of 1-10. The


compound was tested externally on the eyes of rabbits, and, according to the degree of injury observedafter 24 hours, rated on a scale of 1 to 10. The most severely injurious substances have been rated 10.[Grant, W.M. Toxicology of the Eye. 3rd ed. Springfield, IL: CharlesC. Thomas Publisher, 1986. 617]**PEER REVIEWED**



... Cultures of mature organotypic cord ganglia were extracted from fetal mouse spinal cord with theattached dorsal root. MEK at 300 ug/ml nutrient fluid was added to cultures for periods of up to 7 weeks.Cultures were examined under microscope twice weekly for morphological changes and were sampled at3, 5, and 7 weeks for electron microscopy. Treated cultures remained viable for the 7 week exposureperiod. After 6 to 7 weeks of exposure, distinct intraaxonal inclusion occurred along proximal and distalinternodes of occasional sensory peripheral nerves (PNS). The structures lengthened and darkenedthroughout the exposure period and were often associated with axoplasmic granularity. The earliestchange in cytoplasm was dispersion of Nissl bodies, which resulted in excessive numbers of freeribosomes or polyribosomal changes. There was a distension of neuronal cisternal systems. By week 5there were abnormal amounts of smooth or agranular endoplasmic reticulum which appeared swollenwith a translucent material. A swollen agranular recticulum was often associated with foci of axoplasmicdebris. By week 7, intra-axonal cores of debris and myelin whorls were documented in 25% of thecentral nervous system and sensory perpipheral nerves axons examined ultrastucturally. ...[Veronesi B; Neurotoxicology 5 (4): 31-43 (1984)]**PEER REVIEWED**

Chemical test results for cytogenetic effects in Chinese hamster ovary cells ... were negative for bothchromosome aberrations and sister chromatid exchanges.[NTP; Fiscal Year 1987 Annual Plan p.87 (1987) NTP-87-001]**PEERREVIEWED**

An oral dose of 1.5 g/kg to rats resulted in a 63% incr in liver triglycerides after 16 to 23 hr, but did notalter liver histology or incr either of two enzymes, serum glutamic-pyruvic transaminase (alaninetransferase (ALT)) and hepatic glucose-6-phosphatase ... Much smaller acute ip doses (0.049 to 0.194g/kg) to rats appeared not to damage the liver. A single oral dose (15 mmol/kg) of MEK did not affectthe hepatobiliary function of rats over an observation period of 10 to 96 hr. ... A graded series of singledoses of MEK to guinea-pigs revealed high sensitivity to small changes in dosage. The low dose (0.75


g/kg) appeared to produce no liver damage, whereas 1.5 g/kg produced slight liver damage and 2.0 g/kgproduced major liver damage. These results also suggest that guinea-pigs and rats may be equallysensitive to MEK in terms of liver damage even though guinea-pigs survive acute exposure to higherconcn of MEK vapor than do rats ... .[WHO; Environ Health Criteria 143: Methyl Ethyl Ketone p.58(1993)]**PEER REVIEWED**

Consistent incr in the frequency of food-reinforced lever pressing by rats were detected at MEKexposures as low as 74 mg/cu m (25 ppm) for 2 hr. ... Vestibulo-ocular effects were detected duringcontinuous iv admin of MEK for 1 hr via the caudal vein at a dosage as low as 0.005 g/kg/min ... thisdosage is roughly equivalent to inhalation of 2,700 mg/cu m (900 ppm). ... Exposure of mice to 885mg/cu m (300 ppm) for 30 min did not significantly alter schedule-controlled responses, whereasconcn-related suppression of response occurred at consecutive incr concn (for 30 min) ranging from2,950 to 29,500 mg/cu m (1,000 to 10,000 ppm) ... .[WHO; Environ Health Criteria 143: Methyl Ethyl Ketone p.67(1993)]**PEER REVIEWED**

In skin irritation studies, a small dose (8 mg) applied to clipped skin and covered by an imperviousplastic film for 24 hr ... produced only minor irritation in male New Zealand albino rabbits. ... A dose of400 mg applied to the clipped dorsal skin of restrained albino rabbits in a gauze patch produced mild tomoderate irritation in some cases. ... Neat MEK (0.1 mL) applied to the clipped skin of the flanks ofguinea pigs and rabbits daily for 10 days and left uncovered caused erythema and edema after 24-72 hr.These effects were more marked in rabbits ... .[WHO; Environ Health Criteria 143: Methyl Ethyl Ketone p.67(1993)]**PEER REVIEWED**

The results of studies on eye irritation in rabbits are inconsistent. ... 0.005 mL (4 mg) created a severechemical burn in the rabbit eye, whereas /another/ ... study ... reported less severe irritant effects from thelarger dose of 0.1 mL (80 mg). Data from ... /another/ study ... were also inconsistent but indicated that adose of 0.1 mL (80 mg) produced minimal to moderate eye irritation. Undiluted MEK was used in allthree studies ... /however different ocular grading scales were employed/. In all studies irritationdisappeared or was markedly reduced by 7 days after treatment. Opaque corneas were apparent followingexposure of guinea-pigs to 295,000 mg MEK/cu m (100,000 ppm) for 30 min; recovery from this effectwas complete in 4-8 days ... .[WHO; Environ Health Criteria 143: Methyl Ethyl Ketone p.68(1993)]**PEER REVIEWED**

Female rats exposed to 14,750 mg/cu m (5,000 ppm) 6 hr/day, 5 days/wk for 90 days showed onlyslightly incr liver weight, slightly decr brain and spleen weights, and slightly altered blood chemistry incomparison with controls. Male rats receiving this exposure showed only a slightly incr liver weight. Atlower concn of MEK (3,688 and 7,375 mg/cu m (1,250 and 2,500 ppm)) there was only slightly incr liverweight for female rats and no significant differences for males in comparison with controls ... . In anothersubchronic inhalation study ... male and female rats were exposed to MEK concn of 3,700, 7,430 and14,870 mg/cu m (1,254, 2,518, and 5,041 ppm) 6 hr/day, 5 days/wk for 90 days. No significant effects onfood consumption, eyes or nervous system were observed. In addition, MEK-induced morphologicalchanges in the central or peripheral nervous system were detected.[WHO; Environ Health Criteria 143: Methyl Ethyl Ketone p.68



In the cat, injection of 150 mg MEK (99.98% pure) per kg, twice a day, 5 days/wk, for up to 8.5 months,into subcutaneous tissue produced abscesses, skin ulceration and generalized weakness but no evidenceof damage to the nervous system ... .[WHO; Environ Health Criteria 143: Methyl Ethyl Ketone p.73(1993)]**PEER REVIEWED**

... examined the vestibulo-oculomotor reflex (VOR) during iv infusion of MEK into the caudal veins of18 female Sprague-Dawley rats. The threshold for depression of the VOR was an infusion rate of 70umol/kg (0.005 g/kg per min) for 1 hr (total dose 30 mg) and the assoc arterial blood level was 1.4mmol/L. General depression of the central nervous system followed depression of the VOR.[WHO; Environ Health Criteria 143: Methyl Ethyl Ketone p.74(1993)]**PEER REVIEWED**

... groups of 10 virgin female Swiss CD1 mice and 33 plug-positive (day 0) females were exposed byinhalation on gestation days 6-15 to mean concn of 1174 ... 2980 ... and 8909 ... mg/cu m. ... There wasno evidence of maternal toxicity, although there was a slight, treatment-related incr in liver/body weightratios that was significant at the highest dose level. Mild fetal toxicity was evident at this maternal doselevel as a reduction in mean fetal body weight, statistically significant for males. There was no incr in theincidence of intrauterine death, but there was an incr dose-related incidence of misaligned sternebrae,statistically significant at the highest dose level. There were no significant incr in the incidence ofmalformations, although there were several malformation in one litter (cleft palate, fused ribs, missingvertebrae, syndactyly) in treated groups but not in the control group nor in contemporary control data.[WHO; Environ Health Criteria 143: Methyl Ethyl Ketone p.77(1993)]**PEER REVIEWED**

... conducted mutagenicity studies on MEK. The test systems comprised the Salmonella/microsome(Ames) assay, the L5178/TK+/- mouse lymphoma (M/L) assay, the BALB/3T3 cell transformation (CT)assay, unscheduled DNA synthesis (UDS) and the micronucleus test. MEK was not found to begenotoxic in these assays.[WHO; Environ Health Criteria 143: Methyl Ethyl Ketone p.80(1993)]**PEER REVIEWED**

The effect of MEK on the alarm behavior of social insects has been studied. It was considered inactive inproducing alarm behavior in the ant Iridomyrmex preinosus ... the harvester ant Pogonomyrmex badius ...and the honeybee Apis Mellifera ... .[WHO; Environ Health Criteria 143: Methyl Ethyl Ketone p.96(1993)]**PEER REVIEWED**

The developmental effects observed at an MEK vapor concentration of 3000 ppm were reexamined.Pregnant Sprague-Dawley rats were exposed to 400, 1000, or 3000 ppm of MEK for 7 hr/day on days 6to 15 of gestation. There were no effects on maternal liver weight; however, a significant decrease inmaternal body weight gain was observed in the animals exposed to 3000 ppm of MEK. In addition, noneof the exposures affected the pregnancy rate, the number of implantations or fetal resorptions, the littersize, or the fetal body weight. Unlike the initial study, there were no gross or soft-tissue malformations atany exposure level; however, the 3000-ppm exposure caused a significant increase in the incidence ofdelayed skeletal ossifications (skull and neck) and an increase in the incidence of extra lumbar ribs. /It


was/ concluded that MEK was not embryotoxic or teratogenic and only slightly fetotoxic in the rat atexposure concentrations of 3000 ppm.[Clayton, G.D., F.E. Clayton (eds.) Patty's Industrial Hygiene andToxicology. Volumes 2A, 2B, 2C, 2D, 2E, 2F: Toxicology. 4th ed. NewYork, NY: John Wiley & Sons Inc., 1993-1994. 1759]**PEER REVIEWED**

Groups of pregnant and nonpregnant mice were exposed to MEK vapor concentrations of 400, 1000, or3000 ppm for 7 hr/day for 10 consecutive days (for pregnant mice, days 6 to 15 of gestation). Thenonpregnant and pregnant mice showed no differences in sensitivity to the MEK exposures. Thematernal body weight gain, extragestational weight gain, uterine weight, pregnancy rate, andimplantation ratio were not affected by exposure to MEK vapors relative to control. The 3000-ppmexposure did, however, result in a relative increase in maternal liver and kidney weight. The percentageof live fetuses, resorptions, and dead fetuses per litter was also unaffected by the treatment. Aconcentration-related decrease in fetal weight was observed for both the male and females. Althoughthere were no statistically significant increases in the number of malformed fetuses per litter, there wereseveral atypical malformations (cleft palate, fused ribs, missing vertebrae, and syndactyly) not oftenfound in control litters. A statistically significant increase in the incidence of misaligned sternebrae wasobserved in the fetuses exposed to 3000 ppm of MEK. No developmental or maternal effects wereobserved at vapor concentrations of 1000 ppm or less. After considering the results from the presentstudy together with results obtained in rats, the authors concluded that MEK vapors caused milddevelopmental toxicity at concentrations that caused maternal toxicity.[Clayton, G.D., F.E. Clayton (eds.) Patty's Industrial Hygiene andToxicology. Volumes 2A, 2B, 2C, 2D, 2E, 2F: Toxicology. 4th ed. NewYork, NY: John Wiley & Sons Inc., 1993-1994. 1758]**PEER REVIEWED**

Non-Human Toxicity Values:

LD50 Rat oral 2.9 (95% C.I. 2.3-3.5) g/kg /From table/[WHO; Environ Health Criteria 143: Methyl Ethyl Ketone p.59(1993)]**PEER REVIEWED**

LD50 Rat (female) oral 5.52 (95% C.I. 4.50-6.80) g/kg /From table/[WHO; Environ Health Criteria 143: Methyl Ethyl Ketone p.59(1993)]**PEER REVIEWED**

LD50 Mouse (male) oral 3.14 + or - 0.67 g/kg /From table/[WHO; Environ Health Criteria 143: Methyl Ethyl Ketone p.60(1993)]**PEER REVIEWED**

LC50 (45 min) Mouse (male) inhalation 205,000 + or - 32,500 mg/cu m (69,500 + or - 11,000 ppm)/From table/[WHO; Environ Health Criteria 143: Methyl Ethyl Ketone p.60(1993)]**PEER REVIEWED**

LC50 (4 hr) Rat (male) inhalation 34,500 mg/cu m (11,700 ppm) /From table/[WHO; Environ Health Criteria 143: Methyl Ethyl Ketone p.61(1993)]**PEER REVIEWED**

LD50 (24 hr) Mouse (male) ip 1.66 + or - 0.74 g/kg /From table/


[WHO; Environ Health Criteria 143: Methyl Ethyl Ketone p.63(1993)]**PEER REVIEWED**

LD50 (24 hr) Rat (female) ip 1.554 (95% CI 1.229-1.966) g/kg /From table/[WHO; Environ Health Criteria 143: Methyl Ethyl Ketone p.63(1993)]**PEER REVIEWED**

LD50 (14 day) Rat (female) ip 0.607 (95% C.I. 0.486-0.748 g/kg /From table/[WHO; Environ Health Criteria 143: Methyl Ethyl Ketone p.63(1993)]**PEER REVIEWED**

LD50 (14 days) Rabbit (male) dermal >8 g/kg /From table; 24-hr occluded exposure duration/[WHO; Environ Health Criteria 143: Methyl Ethyl Ketone p.64(1993)]**PEER REVIEWED**

Ecotoxicity Values:

LC50 Lepomis macrochirus (bluegill) 5,640-1,690 mg/l 24 to 96-hr /Conditions of bioassay notspecified/[Verschueren, K. Handbook of Environmental Data on Organic Chemicals.3rd ed. New York, NY: Van Nostrand Reinhold Co., 1996. 1283]**PEERREVIEWED**

LC50 Artemia salina (brine shrimp) 1,950 mg/L 24-hr /From table; bottles not sealed and may have lostMEK during experiment; water pH, temp, and hardness not specified/[WHO; Environ Health Criteria 143: Methyl Ethyl Ketone p.97(1993)]**PEER REVIEWED**

LC50 Daphnia magna (water flea) <520 mg/L 48-hr /From table; pH 8 and hardness 173; temp notspecified/[WHO; Environ Health Criteria 143: Methyl Ethyl Ketone p.97(1993)]**PEER REVIEWED**

LC50 Daphnia magna (water flea) 1382 (95% C.I. 918-3349) mg/l 48-hr /From table; pH 7.21, temp21.0-23.0 deg C, hardness 38 mg/L calcium carbonate /[WHO; Environ Health Criteria 143: Methyl Ethyl Ketone p.97(1993)]**PEER REVIEWED**

LC50 Daphnia magna (water flea) 8890 mg/l 24-hr /From table; pH 7.6-7.7, temp 20-22 deg C, hardness16 deg (German)/[WHO; Environ Health Criteria 143: Methyl Ethyl Ketone p.97(1993)]**PEER REVIEWED**

LC50 Lebistes reticulatus (guppy) 5700 mg/l 24-hr /From table; pH not given, temp 20 deg C, hardness27.5 mg/L CaCl2/[WHO; Environ Health Criteria 143: Methyl Ethyl Ketone p.98(1993)]**PEER REVIEWED**

LC50 Pimephales promelas (fathead minnow) 3200 mg/L 96 hr /From table; pH 7.5, temp 25 deg C,hardness 42.2 mg/L calcium carbonate /



LC50 Lepomis macrochirus (bluegill sunfish) 4467 mg/l 96-hr /From table; pH 7.93, temp 21 deg C,hardness 240 mg/l calcium carbonate /[WHO; Environ Health Criteria 143: Methyl Ethyl Ketone p.99(1993)]**PEER REVIEWED**

LC50 Gambusia affinis (mosquito fish) 5600 mg/l 96-hr /From table; pH 7.8-8.3, room temp, hardnessnot specified/[WHO; Environ Health Criteria 143: Methyl Ethyl Ketone p.99(1993)]**PEER REVIEWED**

LC50 Carassius auratus (goldfish) >5000 mg/l 24-hr /From table; pH 7.0, temp 20 deg C, hardness 100mg/l/[WHO; Environ Health Criteria 143: Methyl Ethyl Ketone p.99(1993)]**PEER REVIEWED**








Methyl ethyl ketone was evaluated for the ability to increase the incidence of micronucleatedpolychromatic erythrocytes in bone marrow of male and female CD-1 mice treated by single i.p.injection (Micronucleus Test). Groups of 10 mice (5 male, 5 female) were sacrificed 12, 24 and 48 hoursfollowing injection of methyl ethyl ketone in corn oil at a dose of 1.96 ml/kg body weight (calculatedLD20 dose). The ratio of normochromatic to polychromatic erythrocytes were not significantly different(p > 0.05, ANOVA) in the treated groups compared with vehicle controls, regardless of sacrifice time.The incidence of micronucleated polychromatic erythrocytes was increased above the vehicle control 24hours after administration, but was not considered statistically significant when compared to all treatmentand vehicle control groups regardless of sacrifice time (p > 0.05, ANOVA).[Microbiological Associates Inc.; Activity of Methyl Ethyl Ketone inthe Micronucleus Cytogenetic Assay in Mice, Final Report, (1984), EPA


Document No. 40-8444072, Fiche No. OTS0507470] **UNREVIEWED**



Metabolism/Pharmacokinetics:



IT HAS BEEN SHOWN TO INCREASE THE GLUCURONIC ACID OUTPUT ... & URINE OFRABBITS RECEIVING IT HAS BEEN STATED ... TO CONTAIN THE GLUCURONIDE OF2-BUTANOL.[Browning, E. Toxicity and Metabolism of Industrial Solvents. NewYork: American Elsevier, 1965. 422]**PEER REVIEWED**







MEK has been reported to be a metabolic end product of natural gas (methane 88%, ethane 5%, propane5%, iso-butane 2%, with traces of t-butyl mercaptan and methyl acrylate) inhaled for 2 hr by ICR mice ...In an in vivo study of the metabolism of propane, n-butane and iso-butane inhaled for 1 hr by ICR mice,it was found that n-butane gave rise to sec-butanol and MEK ... In vitro studies showed that mouse livermicrosomal preparations metabolized n-butane to sec-butanol, the precursor of MEK ... Inhalation bymale Sprague-Dawley rats of sec-butanol at concn of 5900 mg/cu m (2000 ppm) for 3 days or 1475mg/cu m (500 ppm) for 5 days caused marked enzyme induction of cytochrome P-450 in liver andkidney but other butanol isomers did not have this effect ... The authors concluded that the mechanism ofinduction was via the sec-butanol metabolite MEK.[WHO; Environ Health Criteria 143: Methyl Ethyl Ketone p.51(1993)]**PEER REVIEWED**

... the toxic effects of MEK and 2-butanol were essentially identical in rats, and that 2-butanol wasrapidly oxidized to MEK. ... identified the metabolites of MEK in guinea pigs as 2-butanol,3-hydroxy-2-butanone and 2,3-butanediol. They hypothesized that the metabolism followed bothoxidative and reductive pathways, with the latter leading to the production of 2-butanol.[WHO; Environ Health Criteria 143: Methyl Ethyl Ketone p.52(1993)]**PEER REVIEWED**

In rats exposed by inhalation to 1760 mg MEK/cu m (600 ppm), there were only marginal effects onmicrosomal cytochrome P-450 activities ... However, a daily dose of 1.4 mL MEK per kg for 3 days incrthe amounts of ethanol- and phenobarbital-inducible cytochromes P-450 ...[WHO; Environ Health Criteria 143: Methyl Ethyl Ketone p.53(1993)]**PEER REVIEWED**

In a study on male Sprague-Dawley rats, pretreatment with MEK elevated total microsomal cytochromeP-450 and NADPH-dependent cytochrome-c-reductase, the rates of oxidation ofN-nitrosodimethylamine, benzphetamine and pentoxyresorufin, and also the levels of immunoreactiveprotein for both P-450 isozymes ... In a study of hepatotoxicity in rats, ... found that MEK incr livercytochrome P-450 content (33-86%) and glutathione-S-transferase (GST) activity (42-64%) but had noeffect on serum glutamate dehydrogenase (GLDH) activity. ... studied the effects on hepatic cytochromeP-450 activities of repeated daily doses of 1.87 mL/kg given by gavage to male Fischer-344 rats. Theactivity of 7-ethoxy coumarin-O-deethylase was incr by up to 500% after 1 to 7 days of MEK treatment,


but there was practically no change in benzphetamine-N-demethylase activity. In another study in maleSprague-Dawley rats, admin of MEK by gavage cause an incr in hepatic acetanilide hydroxylase and amarginal incr in aminopyrine-N-demethylase activities ... .[WHO; Environ Health Criteria 143: Methyl Ethyl Ketone p.53(1993)]**PEER REVIEWED**

MEK has been identified as a minor but normal constituent of urine ... serum and urine of diabetics ...and expired air ... . Its production in the body has been attributed to isoleucine catabolism ... studies ...indicate that the same metabolites are produced and excreted in humans as in experimental animals. ...further indicated that in an inhalation exposure to 590 mg MEK/cu m (200 ppm) the calculated areasunder the curves of blood solvent concn versus time (AUC) for MEK and 2,3-butanediol were equal,which suggests that MEK is almost completely transformed to 2,3-butanediol. The bulk of MEKabsorbed thus enters the general metabolism and is transformed to simple compounds like carbon dioxideand water.[WHO; Environ Health Criteria 143: Methyl Ethyl Ketone p.55(1993)]**PEER REVIEWED**



Ketones are readily absorbed through the intact skin. Usually they are rapidly excreted ... in the expiredair. /Ketones/[International Labour Office. Encyclopedia of Occupational Health andSafety. Vols. I&II. Geneva, Switzerland: International Labour Office,1983. 1170]**PEER REVIEWED**


ALTHOUGH ABSORPTION ... THROUGH THE SKIN MAY OCCUR, IT HAS BEEN SHOWNTHAT IT IS LOW IN TOXICITY BY THIS ROUTE.[Patty, F. (ed.). Industrial Hygiene and Toxicology: Volume II:Toxicology. 2nd ed. New York: Interscience Publishers, 1963.1732]**PEER REVIEWED**

Percutaneous absorption of MEK appears to be rapid ... MEK was present in the exhaled air of humansubjects within 2.5-3.0 min after it was applied to normal skin of the forearm, and the concn of MEK in


exhaled air reached a plateau in 2-3 hr. The rate of absorption was controlled mainly by the moisturecontent of the skin. With dry skin, absorption was slow, and it took 4-5 hr for the concn of MEK inexpired air to attain a plateau. With moist skin, absorption was very rapid initially. MEK was detected inexpired air in measurable concn within 30 sec after an application of MEK to the forearm, and a maxconcn in expired air, averaging 4X the plateau level for normal and dry skin, was achieved in 10-15 min.[WHO; Environ Health Criteria 143: Methyl Ethyl Ketone p.49(1993)]**PEER REVIEWED**

The absorption of MEK via the lungs was examined ... in a study of workers exposed in industrialworkplace. The MEK concn in alveolar and expired air correlated significantly with the environmentalconcn, and averaged 30% of the latter. In more recent studies ... values for pulmonary absorption rangingfrom 41.1% to 55.8% were obtained. ... Deeper inhalation incr the alveolar volume relative to the deadspace (the non-alveolar volume of the respiratory system), and thus incr the apparent absorption ... .[WHO; Environ Health Criteria 143: Methyl Ethyl Ketone p.49(1993)]**PEER REVIEWED**

Results of studies ... indicated a rapid transfer of MEK vapor into the blood stream. ... the concn of MEKin the blood and urine were significantly correlated with the environmental concn, indicating rapidtransfer to the blood and thence to other tissues. In human volunteer subjects, exercise during exposuremarkedly incr the MEK level in blood in comparison with sedentary behavior ... indicating that the bloodMEK level also depended on the rate of uptake. ... also found significant correlations betweenenvironmental levels of MEK and amounts excreted in the urine of exposed workers. The concn of MEKin urine rose from essentially 0 to 70% of its max value during the first 2 hr of an 8-hr shift ... .[WHO; Environ Health Criteria 143: Methyl Ethyl Ketone p.50(1993)]**PEER REVIEWED**

... studied biological monitoring of occupational exposure to MEK in 67 healthy male workers employedin plastic bag or video-tape production. Their ages ranged between 18 and 52 yr with an average workingexperience of 8.6 yr. for the majority of the workers, atmospheric MEK concn were in the range of30-885 mg/cu m (10-300 ppm). MEK concn in urine, blood and exhaled air were measured once/week atthe end of a shift. About 10% of absorbed MEK was eliminated in the exhaled air. Following exposure to590 mg/cu m (200 ppm), the urinary concn was 5.1 umol/L or 4.11 mg/g creatinine. The correlationcoefficients between atmospheric MEK concn and end-of-shift urine, blood and exhaled air were 0.89,0.85, and 0.79, respectively. The authors also reported good correlation between blood and urinary MEK... and between blood and exhaled air concn ... but poor correlation between exhaled air and urinaryMEK concn.[WHO; Environ Health Criteria 143: Methyl Ethyl Ketone p.50(1993)]**PEER REVIEWED**

In male rats given a large MEK dose (1505 or 1690 mg/kg) in water, blood concn reached maxima of0.95 and 0.94 mg/mL 4 hr after ingestion and subsequently declined sharply, indicating protractedabsorption of this dose from the GI tract ... .[WHO; Environ Health Criteria 143: Methyl Ethyl Ketone p.51(1993)]**PEER REVIEWED**

... intraperitoneal injection of MEK in research on metabolism and toxicity, suggest that absorption fromthe peritoneal cavity is rapid.



The distribution of MEK in human tissues was examined ... in two solvent-exposed workers who diedsuddenly of heart attacks at the workplace. The results of this study ... indicate that the solubility of MEKis similar for all tissues. ... With a blood/air partition coefficient of 202, MEK can reach equilibriumconcn in a compartment in about 3 min. Distribution volumes were 6.0 for vessel-rich tissues, 39.6 formuscle and 12.8 for fat. Biological half-lives for the same tissues were 0.8, 21.8 and 23.3 min,respectively.[WHO; Environ Health Criteria 143: Methyl Ethyl Ketone p.51(1993)]**PEER REVIEWED**

The results of in vitro measurements at 37 deg C of human tissue-gas partition coefficients, obtained byexposing samples of blood and tissue to a known concn of MEK ... The partition coefficients rangedfrom 96 to 162, but did not exceed 111, with the exception of whole blood (125), blood plasma (133) andfat (162). Other blood-gas partition coefficients measurements for MEK are 202 ... and 215 ... .[WHO; Environ Health Criteria 143: Methyl Ethyl Ketone p.51(1993)]**PEER REVIEWED**

... provided evidence that MEK can enter the liver of rats and guinea-pigs, and ... reported that it cancross the placenta and enter the human fetus.[WHO; Environ Health Criteria 143: Methyl Ethyl Ketone p.51(1993)]**PEER REVIEWED**

MEK and its metabolites are excreted by the lungs and kidneys. ... only 3% of the calculated absorbeddose during a 4-hr exposure to 590 mg MEK/cu m (200 ppm) was secreted unchanged in the exhaled airof volunteers after the exposure. The fractional elimination of unchanged substance however depends onthe efficiency of metabolic clearance. Since metabolic saturation for MEK in humans begins at relativelylow levels (about 100 ppm) of exposure ... proportionally greater amounts of MEK would be expected tobe excreted via the lungs (and kidneys) at high exposure levels.[WHO; Environ Health Criteria 143: Methyl Ethyl Ketone p.55(1993)]**PEER REVIEWED**

Relatively little of absorbed MEK is excreted unchanged via the kidneys; a study of occupationallyexposed workers revealed that it is less than 0.1% of the alveolar uptake ... In a similar study of workersoccupationally exposed to a mixture of solvents, the excretion of MEK and a major recognizablemetabolite, 3-hydroxy-2-butanone, was 0.1% of alveolar uptake ... The concentrations of both MEK and3-hydroxy-2-butanone in urine were significantly correlated with the environmental level of MEK.Other metabolites of MEK, 2-butanol or 2,3-butanediol ... identified in the serum of guinea pigs, werenot detected in the urine of the exposed workers. ... however ... human excretion of 2,3-butanediol wasindividually variable but averaged 2% of the absorbed MEK. The urinary excretion of 2-butanol, a minormetabolite of MEK was examined ... clearance of 2-butanol admin by gavage in rabbits was about 14%of the admin dose and in the form of a glucuronide.[WHO; Environ Health Criteria 143: Methyl Ethyl Ketone p.55(1993)]**PEER REVIEWED**

Absorption of methylethylketone is rapid via inhalation and ingestion, and the compound is presumably amoderate skin penetrant as well. Since methylethylketone is both water and lipid soluble, it is rather


evenly distributed in tissues.[Zenz, C., O.B. Dickerson, E.P. Horvath. Occupational Medicine. 3rded. St. Louis, MO., 1994 149]**PEER REVIEWED**



... The biological half lives for elimination of acetone and MEK calculated on the basis of a first orderkinetic assumption were 3.9 hours and 49 minutes, respectively. ... Workers exposed to acetone or MEKfor 6 to 8 hours could expect to have a residual body burden of acetone the next morning, whereas MEKwould be essentially eliminated.[Brown WD et al; The Changing Nature of Work and Workforce,Proceedings of the Third Joint US-Finish Science Symposium p.111-14(1986)]**PEER REVIEWED**

The distribution of MEK in human tissues was examined ... in two solvent-exposed workers who diedsuddenly of heart attacks at the workplace. ... Distribution volumes were 6.0 for vessel-rich tissues, 39.6for muscle and 12.8 for fat. Biological half-lives for the same tissues were 0.8, 21.8 and 23.3 min,respectively.[WHO; Environ Health Criteria 143: Methyl Ethyl Ketone p.51(1993)]**PEER REVIEWED**

Both animal and human data indicate a rapid turnover of MEK. In guinea-pigs receiving an ip dose of450 mg MEK/kg, the half-life of MEK in blood serum was 4.5 hr and the clearance time for MEK inserum was 12 hr. For the metabolites 2-butanol, 3-hydroxy-2-butanone and 2,3-butanediol, the clearancetime in serum was 11 hr ... In a study ... on rats given an oral dose of 2-butanone of 2.1 mg/kg, there wasa half-life of 3.6 hr for MEK in blood if the rate of loss was assumed to be constant between the twotimes of measurement (4 and 18 hrs) after dosing. Data from a study ... on rats receiving oral doses of2-butanol or MEK also indicate a half-life of about 4 hr for MEK. ... the clearance rate for3-hydroxy-2-butanone and 2,3-butanediol was independent of dose for the two doses used (0.4 and 0.8g/kg) and that the half-lives for these metabolites of MEK were 47 min and 3.45 hr, respectively.[WHO; Environ Health Criteria 143: Methyl Ethyl Ketone p.56(1993)]**PEER REVIEWED**

... reported a steady incr in blood concn during 4-hr exposures of human volunteer subjects to 590 mg/cum (200 ppm) and observed a rapid elimination of MEK, with half-lives of 30 min during the firstpost-exposure hr and 81 min thereafter. An inhalation study with two volunteer subjects exposed to MEKfor 4 hr at concn of 74,590 and 1,180 mg/cu m (25,200 and 400 ppm, respectively) indicated that thekinetics of MEK were dose dependent at higher exposure concn, i.e., much higher levels of MEK inblood were reached relative to inhaled concn, and the post-exposure elimination of MEK in blood wasslower (zero-order kinetics). Simulated exposure to MEK for 8 hr suggests that saturation kinetics arereached at about 295 mg/cu m (100 ppm) at rest and 148 mg/cu m (50 ppm) during light exercise ... .[WHO; Environ Health Criteria 143: Methyl Ethyl Ketone p.56





There is very limited info on the mechanisms of toxic action of MEK. Relatively high inhaled concn1,475-29,500 mg/cu m (500-10,000 ppm) caused pulmonary vasoconstriction and hypertension in catsand dogs ... From the toxicological point of view, interactions leading to the potentiation of effects,particularly neurotoxicity, by other intrinsically toxic substances constitute the main hazard of MEK. Themechanisms underlying these interactions are incompletely known ... .[WHO; Environ Health Criteria 143: Methyl Ethyl Ketone p.57(1993)]**PEER REVIEWED**

Interactions:




The effects of acute exposure to toluene and methyl ethyl ketone (MEK) singly and in combination


were investigated. ... The effects of these chemicals on behavior and body burden were determined. ...MEK had no effect on any measures. Behavior performance was not affected by the combination oftoluene and MEK. Body burden of the two solvents was not additive. ... Neither chemical potentiated theeffect of the other at the concentrations studied.[Dick RB et al; Int Arch Occup Environ Health 54 (2): 91-109(1984)]**PEER REVIEWED**



Ingestion of ethanol (0.8 g/kg) combined with an inhalation exposure to MEK (590 mg/cu m, 200 ppm)inhibited the oxidative metabolism of MEK and led to a marked incr in the blood concn of MEK ... Therewas a concurrent, even more pronounced elevation of the blood 2-butanol concn; the most likelyexplanation is competitive inhibition by ethanol of the oxidation of 2-butanol back to MEK. Ethanol alsoappeared to interact with the further biotransformation of 2,3-butanediol as the urinary excretion of themetabolite was incr. Co-exposure with xylene, however, had no effect on the human metabolism or rateof elimination of MEK ... .[WHO; Environ Health Criteria 143: Methyl Ethyl Ketone p.57(1993)]**PEER REVIEWED**

... found that MEK and certain other polar aprotic solvents were strong inducers of aneuploidy in theyeast. The induction of aneuploidy by MEK was markedly potentiated by coexposure to ethyl acetate ...or with nocodazol ... .[WHO; Environ Health Criteria 143: Methyl Ethyl Ketone p.80(1993)]**PEER REVIEWED**

MEK interacts with hexacarbon compounds and potentiates their neurotoxicity ... Potentially MEKco-exposure could affect the metabolism of the hexacarbon compounds or the toxic process by which thehexacarbons induce the neuropathy. ... The metabolic pathway involves hepatic microsomal oxidation to2,5-hexanedione, the proximate neurotoxicant, which is thought to induce cross-linking ofneurofilaments, blockage of transport at the node of Ranvier, and swelling from accumulatedneurofilaments proximal to the nodes and axonal degeneration distal to the nodes.[WHO; Environ Health Criteria 143: Methyl Ethyl Ketone p.101(1993)]**PEER REVIEWED**

Carbon tetrachloride (CCl4), chloroform (CHCl3) and related haloalkane solvents are liver and kidneypoisons as well as central nervous depressants ... It has long been known that the hepatotoxic action ofCCl4 is potentiated by ethanol, and more recently that the hepatic and/or renal toxicity of CCl4, CHCl3,trichloroethylene, 1,1,2-trichloroethane and related compounds is potentiated by n-hexane, ethanol,isopropanol, acetone, MEK, MBK, 2,5-HD, and other ketones or chemicals that are metabolized to


ketones ... Even an incr of naturally occurring ketones in the body via diabetes can precipitatepotentiation. Decr the transformation of isopropanol to acetone by the admin of an inhibitor of alcoholdehydrogenase, pyrazole, has reduced potentiation of haloalkane toxicity. Although the phenomenon isreferred to as haloalkane toxicity, experimental work in general appears largely or entirely limited tochlorinated compounds, and specific studies on MEK are limited to interactions with CCl4 and CHCl3.[WHO; Environ Health Criteria 143: Methyl Ethyl Ketone p.115(1993)]**PEER REVIEWED**

Pharmacology:

Interactions:





... An important observation was the marked potentiation of peripheral neurotoxicity observed whenanimals were exposed to n-butyl ketone in combination with methyl ethyl ketone at a ratio of 1:5,n-butyl ketone: methyl ethyl ketone. The latter solvent showed no neurotoxic effect alone.[Saida K et al; J Neuropathol Exp Neurol 35 (3): 207-25 (1976)]**PEER


REVIEWED**





Carbon tetrachloride (CCl4), chloroform (CHCl3) and related haloalkane solvents are liver and kidneypoisons as well as central nervous depressants ... It has long been known that the hepatotoxic action ofCCl4 is potentiated by ethanol, and more recently that the hepatic and/or renal toxicity of CCl4, CHCl3,trichloroethylene, 1,1,2-trichloroethane and related compounds is potentiated by n-hexane, ethanol,isopropanol, acetone, MEK, MBK, 2,5-HD, and other ketones or chemicals that are metabolized toketones ... Even an incr of naturally occurring ketones in the body via diabetes can precipitatepotentiation. Decr the transformation of isopropanol to acetone by the admin of an inhibitor of alcoholdehydrogenase, pyrazole, has reduced potentiation of haloalkane toxicity. Although the phenomenon isreferred to as haloalkane toxicity, experimental work in general appears largely or entirely limited tochlorinated compounds, and specific studies on MEK are limited to interactions with CCl4 and CHCl3.[WHO; Environ Health Criteria 143: Methyl Ethyl Ketone p.115(1993)]**PEER REVIEWED**

Environmental Fate & Exposure:







NIOSH (NOES Survey 1981-1983) has statistically estimated that 1,221,857 workers (201,308 of theseare female) are potentially exposed to methyl ethyl ketone in the US(1). Occupational exposure may bethrough inhalation and dermal contact with this compound at workplaces where methyl ethyl ketone isproduced or used(SRC). The 8 hour TWA exposure to methyl ethyl ketone was 45.4 ppm in a survey of50 occupationally exposed male subjects working in a magnetic videotape producing factory(2). Theseworkers had average concns of methyl ethyl ketone of 2 ppm and 1.4 mg/l in breath and blood samplesrespectively(2). The mean concn of methyl ethyl ketone in the breathing zones of 47 US plants using


polyurethane coatings was 4.33 ppm(3). Methyl ethyl ketone was detected in the breathing zones in 20of 70 samples (mean concn 12 mg/cu m) obtained from autobody shops and spray paint shops inAustralia(4).[(1) NIOSH; National Occupational Exposure Survey (NOES) (1983) (2)Sia Gl et al; Environ Monit Assess 19: 401-11 (1991) (3) Myer HE etal; Am Ind Hyg Assoc J 54: 663-70 (1993) (4) Winder C, Turner PJ; AnnOccup Hyg 36: 385-94 (1992)]**PEER REVIEWED**


Body Burden:





Methyl ethyl ketone occurs naturally as a metabolic byproduct of plants and animals and is released intothe atmosphere by volcanoes and forest fires(1).[(1) Graedel TE et al; Atmospheric Chemical Compounds. NY,NY: Academic


Press p. 263 (1986)]**PEER REVIEWED**



Water pollution: Polyvinyl chloride pipe cement used for joint connection caused 4.5 ppm, 6 monthsafter polyvinyl chloride pipe installation and 2.2 ppm after 8 months (at equilibrium condition-reached inabout 48 hr).[Verschueren, K. Handbook of Environmental Data of Organic Chemicals.2nd ed. New York, NY: Van Nostrand Reinhold Co., 1983. 851]**PEERREVIEWED**

Environmental Fate:


AQUATIC FATE: Based on experimental Koc values of 29 and 34 obtained in silt loams(1), and arecommended classification scheme(2), methyl ethyl ketone is not expected to adsorb to suspendedsolids and sediment in water(SRC). Methyl ethyl ketone is expected to volatilize from watersurfaces(3,SRC) based on the measured Henry's Law constant of 4.7X10-5 atm-cu m/mole(4). Estimatedhalf-lives for a model river and model lake are 19 and 197, hours respectively(3,SRC). Biodegradation ofthis compound is expected based upon numerous screening tests(5-8). According to a classificationscheme(9), an estimated BCF value of 1(3,SRC), from an experimental log Kow of 0.29(10,SRC),suggests that bioconcentration in aquatic organisms is low(SRC).


[(1) Walton BT et al; J Environ Qual 21: 552-58 (1992) (2) Swann RL etal; Res Rev 85: 23 (1983) (3) Lyman WJ et al; Handbook of ChemicalProperty Estimation Methods. Washington DC: Amer Chem Soc pp. 4-9(1990) (4) Bhattacharaya SK et al; Water Res 30: 3099-3105 (1996) (5)Bridie Al, et al; Water Res 13: 627-30 (1979) (6) Price KS et al; JWater Pollut Control Fed 46: 63-77 (1974) (7) Bhattacharaya SK et al;Wat Res 30: 3099-3105 (1996) (8) Suflita JM, Mormile MR; Environ SciTechnol 27: 976-78 (1993) (9) Franke C et al; Chemosphere 29: 1501-14(1994) (10) Hansch C et al; Exploring QSAR Hydrophobic, Electronic andStearic Constants Washington,DC: Amer Chem Soc (1995)]**PEERREVIEWED**




Biological oxygen demand (BOD) after 5 days @ 20 deg C: 1.515-1.92; 2.24 (std dilution technique,normal sewage seed); 5.3 (Dutch std test method); 1.81 (@ 10 mg/l, unadapted sewage, 1 days lagperiod).[Verschueren, K. Handbook of Environmental Data of Organic Chemicals.2nd ed. New York, NY: Van Nostrand Reinhold Co., 1983. 851]**PEERREVIEWED**

Chemical oxygen demand (COD): 2.20-2.31; 5.3 (Dutch std test method); theoretical oxygen demand(ThOD): 2.44; permanganate test value: 0.29.[Verschueren, K. Handbook of Environmental Data of Organic Chemicals.2nd ed. New York, NY: Van Nostrand Reinhold Co., 1983. 851]**PEERREVIEWED**














GROUNDWATER: Methyl ethyl ketone was detected in groundwater at a coal strip-mine in Ohio at aconcn of 650 mg/l(1). Methyl ethyl ketone was identified, not quantified, in on-site and off-sitegroundwater near a landfill in New Jersey(2). Methyl ethyl ketone was detected in the groundwater of acoal strip-mine in Lackawanne, PA at a maximum concn of 29,000 ppb(3). Methyl ethyl ketone wasdetected at an average concn of 12 ug/l in the groundwater of 19 solid waste disposal facilities inWisconsin(4) and in the range of 0-91 ug/l in the groundwater of a landfill located in New Castle, DE(5).Methyl ethyl ketone was detected at an average concn of 60 ug/l in the groundwater of a chemicalmanufacturing facility in Alabama(6).[(1) USEPA; Superfund Record of Decision : Summit National Site,Deerfield OH. USEPA/ROD/R85-88/068 (1988) (2) USEPA; Superfund Recordof Decision: Lipari Landfill Mantau Township, NJ. USEPA/ROD/RO2-88/074(1988) (3) ATSDR; Health assessment for Beacon Heights LandfillNational Priorities List (NPL) Site, Beacon Falls, Connecticut, Region1. CERCLIS NO. CTD001145671. Agency for Toxic Substances and DiseaseRegistry PB90-135971 (1990) (4) Battista JR, Connelly JP; VOCcontamination at selected Wisconsin landfills - sampling results andpolicy implications. Wisc Dept of Natural Resources, Madison, WI.Publ-SW-094 (1989) (5) ATSDR; Health assessment for Tybouts Corner


land (Tybouts) National Priorities List (NPL) site, Wilmington, NewCastle County, Deleware, Region 3. CERCLIS NO. DED000606079. Agencyfor Toxic Substances and Disease Registry PB90-144387 (1989) (6)USEPA; Superfund Record of Decision: Ciba-Geigy (Mcintosh Plant), AL.USEPA/ROD/R04-89/056 (1989)]**PEER REVIEWED**





Methyl ethyl ketone was detected in the effluent of a municipal landfill in Quebec, Ontario at concns of5,200 ppb and 3092 ppb(1). Methyl ethyl ketone was identified, not quantified in the emissions of awaste incinerator in West Germany(2), automobiles(3) and common household waste(4-7). Methyl ethylketone was detected in the effluent from a solid waste composting plant at concns of 130 ug/cu m(background air), 25,500 ug/cu m(tipping area), 1,400 ug/cu m (shredder), 9,400 ug/cu m(indoor air),36,000 ug/cu m (digester), 4,300 ug/cu m(fresh compost), 8,700 ug/cu m(middle age compost), 14,500ug/cu m(old compost) and 1,400 ug/cu m(curing region)(8). Methyl ethyl ketone was identified, notquantified, in the emissions of 200 out of 1,026 common household products(9). Methyl ethyl ketonewas detected in the emissions of a photocopying machine at rates of less than 100 ug/hr to 380 ug/hr(10).


Methyl ethyl ketone was detected at a concn of 974 ug/cu m in the emissions of active compost at acomposting facility in Virginia(11).[(1) Brosseau, Heitz M; Atmos Environ 25A: 1473-77 (1994) (2) Jay K,Stieglitz L; Chemosphere 30: 1249-60 (1995) (3) Harley RA et al;Environ Sci Technol 26: 2395-2408 (1992) (4) Wilkins CK, Larsen K; JHigh Resol Chromatogr 18: 373-77 (1995) (5) Wilkins K, Larsen K;Chemosphere 31: 3225-36 (1995) (6) Wilkins K, Larsen K; Chemosphere32: 2049-55 (1996) (7) Wilkins K; Chemosphere 29: 47-53 (1994) (8)Eitzer BD; Environ Sci Technol 29: 896-902 (1995) (9) Sack TM et al;Atmos Environ 26A: 1063-70 (1992)(10) Leovic KW et al; J Air WasteManage Assoc 46: 821-29 (1996) (11) Vandurme GP et al; Water EnvironRes 64: 19-27 (1992)]**PEER REVIEWED**




The presence of solvents such as toluene, xylene, methyl ethyl ketone, and other similar products in theindoor air of an automobile body repair shop, an offset printing facility and the adjacent dwellings wasmonitored, and the individual exposure of the corresponding workers and residents was tested bybiological monitoring of exhaled breath and by personal air sampling. The concentrations of solventstested in the air of both sites surveyed were lower than prevailing Dutch Maximum AllowableConcentration levels. The levels of solvents recorded in the air of apartments situated on top of thefacilities surveyed were significantly higher than the levels recorded in the surrounding dwellings. Thelevels of methyl ethyl ketone, toluene and xylene in personal air samples of employees at the body shopwere 1.5 times higher than in ambient air. The level of toluene in alveolar air of residents living abovethe automobile repair shop was 50 percent higher than that recorded in spot samples. The levels of othersolvents were equal to or lower than the detection level. At the offset printing facility, toluene, xylene,butylacetate, 2-ethoxyethanol and cyclohexanone in air and in personal air samples followed the samegeneral pattern identified for the body shop. In a dwelling next to the shop and in an apartment on top ofthe shop, the concentrations ranged from 3 to 9 percent and 14 to 19 percent, respectively, of the levelsrecorded inside the facility itself.[Verhoeff AP et al; Int Arch Occup Environ Health 59 (2): 153-63







Food Survey Values:

NON-ALCOHOLIC BEVERAGES 70 PPM; ICE CREAM, ICES, ETC 270 PPM; CANDY 100 PPM;BAKED GOODS 100 PPM[Fenaroli's Handbook of Flavor Ingredients. Volume 2. Edited,


translated, and revised by T.E. Furia and N. Bellanca. 2nd ed.Cleveland: The Chemical Rubber Co., 1975. 59]**PEER REVIEWED**






Milk 0.077-0.079 ppm, milk fat 8 ppm(1).[(1) Lande SS et al; Investigation of Selected Potential EnvironmentalContaminants: Ketonic Solvents p. 102 USEPA 560/2-76-003 (1976)]**PEERREVIEWED**


Environmental Standards & Regulations:

FIFRA Requirements:

Unless designated as an active ingredient in accordance with paragraph (b) or (c) of this section, thissubstance, when used in antimicrobial products, is considered inert, having no independent pesticidal


activity. The percentage of such an ingredient shall be included on the label in the total percentage ofinert ingredients.[40 CFR 162.60 (7/1/88)]**PEER REVIEWED**




TSCA Requirements:


CERCLA Reportable Quantities:

Persons in charge of vessels or facilities are required to notify the National Response Center (NRC)immediately, when there is a release of this designated hazardous substance, in an amount equal to orgreater than its reportable quantity of 5000 lb or 2270 kg. The toll free number of the NRC is (800)424-8802; In the Washington D.C. metropolitan area (202) 426-2675. The rule for determining whennotification is required is stated in 40 CFR 302.4 (section IV. D.3.b).[40 CFR 302.4 (7/1/96)]**PEER REVIEWED**

RCRA Requirements:

U159; As stipulated in 40 CFR 261.33, when 2-butanone, as a commercial chemical product ormanufacturing chemical intermediate or an off-specification commercial chemical product or amanufacturing chemical intermediate, becomes a waste, it must be managed according to Federal and/orState hazardous waste regulations. Also defined as a hazardous waste is any residue, contaminated soil,water, or other debris resulting from the cleanup of a spill, into water or on dry land, of this waste.Generators of small quantities of this waste may qualify for partial exclusion from hazardous wasteregulations (40 CFR 261.5).[40 CFR 261.33 (7/1/96)]**PEER REVIEWED**






State Drinking Water Guidelines:

(AZ) ARIZONA 170 ug/l[USEPA/Office of Water; Federal-State Toxicology and Risk AnalysisCommittee (FSTRAC). Summary of State and Federal Drinking WaterStandards and Guidelines (11/93)] **QC REVIEWED**

(FL) FLORIDA 4,200 ug/l[USEPA/Office of Water; Federal-State Toxicology and Risk AnalysisCommittee (FSTRAC). Summary of State and Federal Drinking WaterStandards and Guidelines (11/93)] **QC REVIEWED**

(MA) MASSACHUSETTS 350 ug/l[USEPA/Office of Water; Federal-State Toxicology and Risk AnalysisCommittee (FSTRAC). Summary of State and Federal Drinking WaterStandards and Guidelines (11/93)] **QC REVIEWED**

(ME) MAINE 170 ug/l[USEPA/Office of Water; Federal-State Toxicology and Risk AnalysisCommittee (FSTRAC). Summary of State and Federal Drinking WaterStandards and Guidelines (11/93)] **QC REVIEWED**

(MN) MINNESOTA 4000 ug/l[USEPA/Office of Water; Federal-State Toxicology and Risk AnalysisCommittee (FSTRAC). Summary of State and Federal Drinking WaterStandards and Guidelines (11/93)] **QC REVIEWED**

(NC) NORTH CAROLINA 170 ug/l[USEPA/Office of Water; Federal-State Toxicology and Risk AnalysisCommittee (FSTRAC). Summary of State and Federal Drinking Water


Standards and Guidelines (11/93)] **QC REVIEWED**

(NH) NEW HAMPSHIRE 170 ug/l[USEPA/Office of Water; Federal-State Toxicology and Risk AnalysisCommittee (FSTRAC). Summary of State and Federal Drinking WaterStandards and Guidelines (11/93)] **QC REVIEWED**

(NJ) NEW JERSEY 270 ug/l[USEPA/Office of Water; Federal-State Toxicology and Risk AnalysisCommittee (FSTRAC). Summary of State and Federal Drinking WaterStandards and Guidelines (11/93)] **QC REVIEWED**

(WI) WISCONSIN 460 ug/l[USEPA/Office of Water; Federal-State Toxicology and Risk AnalysisCommittee (FSTRAC). Summary of State and Federal Drinking WaterStandards and Guidelines (11/93)] **QC REVIEWED**

FDA Requirements:






Chemical/Physical Properties:

Molecular Formula:

C4-H8-O**PEER REVIEWED**

Molecular Weight:

72.11


[Budavari, S. (ed.). The Merck Index - An Encyclopedia of Chemicals,Drugs, and Biologicals. Whitehouse Station, NJ: Merck and Co., Inc.,1996. 1037]**PEER REVIEWED**

Color/Form:

COLORLESS LIQUID[Sax, N.I. Dangerous Properties of Industrial Materials. 6th ed. NewYork, NY: Van Nostrand Reinhold, 1984. 549]**PEER REVIEWED**

Odor:

ACETONE-LIKE ODOR[Budavari, S. (ed.). The Merck Index - An Encyclopedia of Chemicals,Drugs, and Biologicals. Whitehouse Station, NJ: Merck and Co., Inc.,1996. 1037]**PEER REVIEWED**

Sweet, pleasant, pungent[U.S. Coast Guard, Department of Transportation. CHRIS - HazardousChemical Data. Volume II. Washington, D.C.: U.S. Government PrintingOffice, 1984-5.]**PEER REVIEWED**

Moderately sharp, fragrant, mint- or acetone-like odor.[NIOSH. NIOSH Pocket Guide to Chemical Hazards. DHHS (NIOSH)Publication No. 94-116. Washington, D.C.: U.S. Government PrintingOffice, June 1994. 36]**PEER REVIEWED**

Taste:

Taste threshold: 3.00x10+1 ppm in milk (media and purity not specified)[Fazzalari, F.A. (ed.). Compilation of Odor and Taste Threshold ValuesData. ASTM Data Series DS 48A (Committee E-18). Philadelphia, PA:American Society for Testing and Materials, 1978. 24]**PEER REVIEWED**

Taste threshold: 5.00x10+1 ppm in milk (purity not specified)[Fazzalari, F.A. (ed.). Compilation of Odor and Taste Threshold ValuesData. ASTM Data Series DS 48A (Committee E-18). Philadelphia, PA:American Society for Testing and Materials, 1978. 24]**PEER REVIEWED**

Boiling Point:

79.6 DEG C[Budavari, S. (ed.). The Merck Index - An Encyclopedia of Chemicals,Drugs, and Biologicals. Whitehouse Station, NJ: Merck and Co., Inc.,1996. 1037]**PEER REVIEWED**

Melting Point:

-86 DEG C[Budavari, S. (ed.). The Merck Index - An Encyclopedia of Chemicals,


Drugs, and Biologicals. Whitehouse Station, NJ: Merck and Co., Inc.,1996. 1037]**PEER REVIEWED**

Critical Temperature & Pressure:

CRITICAL TEMP: 504.5 DEG F= 262.5 DEG C= 535.7 DEG K; CRITICAL PRESSURE: 603 PSIA=41.0 ATM= 4.15 MN/SQ M[U.S. Coast Guard, Department of Transportation. CHRIS - HazardousChemical Data. Volume II. Washington, D.C.: U.S. Government PrintingOffice, 1984-5.]**PEER REVIEWED**

Density/Specific Gravity:

0.805 AT 20 DEG C/4 DEG C[Budavari, S. (ed.). The Merck Index - An Encyclopedia of Chemicals,Drugs, and Biologicals. Whitehouse Station, NJ: Merck and Co., Inc.,1996. 1037]**PEER REVIEWED**

Heat of Combustion:

-13,480 BTU/LB= -7491 CAL/G= -313.6X10+5 JOULES/KG[U.S. Coast Guard, Department of Transportation. CHRIS - HazardousChemical Data. Volume II. Washington, D.C.: U.S. Government PrintingOffice, 1984-5.]**PEER REVIEWED**

Heat of Vaporization:

LATENT HEAT OF VAPORIZATION: 191 BTU/LB= 106 CAL/G= 4.44X10+5 JOULES/KG[U.S. Coast Guard, Department of Transportation. CHRIS - HazardousChemical Data. Volume II. Washington, D.C.: U.S. Government PrintingOffice, 1984-5.]**PEER REVIEWED**

Octanol/Water Partition Coefficient:

Log Kow = 0.29[Hansch, C., Leo, A., D. Hoekman. Exploring QSAR - Hydrophobic,Electronic, and Steric Constants. Washington, DC: American ChemicalSociety., 1995. 9]**PEER REVIEWED**

Solubilities:

353,000 mg/l in water @ 10 deg C[Verschueren, K. Handbook of Environmental Data on Organic Chemicals.3rd ed. New York, NY: Van Nostrand Reinhold Co., 1996. 1281]**PEERREVIEWED**

SOL IN ALCOHOL, ETHER, ACETONE, & BENZENE[Lide, D.R. (ed.). CRC Handbook of Chemistry and Physics. 76th ed.Boca Raton, FL: CRC Press Inc., 1995-1996.,p. 3-101]**PEER REVIEWED**

190,000 mg/l in water @ 90 deg C


[Verschueren, K. Handbook of Environmental Data on Organic Chemicals.3rd ed. New York, NY: Van Nostrand Reinhold Co., 1996. 1281]**PEERREVIEWED**

Spectral Properties:

MAX ABSORPTION (ALCOHOL): 273.5 NM (LOG E= 1.24); SADTLER REF NUMBER: 297 (IR,PRISM); 101 (IR, GRATING)[Weast, R.C. (ed.). Handbook of Chemistry and Physics. 60th ed. BocaRaton, Florida: CRC Press Inc., 1979.,p. C-228]**PEER REVIEWED**

INDEX OF REFRACTION: 1.3814 @ 15 DEG C/D[Budavari, S. (ed.). The Merck Index - An Encyclopedia of Chemicals,Drugs, and Biologicals. Whitehouse Station, NJ: Merck and Co., Inc.,1996. 1037]**PEER REVIEWED**

IR: 4788 (Coblentz Society Spectral Collection)[Weast, R.C. and M.J. Astle. CRC Handbook of Data on OrganicCompounds. Volumes I and II. Boca Raton, FL: CRC Press Inc. 1985.,p.V1 334]**PEER REVIEWED**

UV: 3-21 (Organic Electronic Spectral Data, Phillips et al, John Wiley & Sons, New York)[Weast, R.C. and M.J. Astle. CRC Handbook of Data on OrganicCompounds. Volumes I and II. Boca Raton, FL: CRC Press Inc. 1985.,p.V1 334]**PEER REVIEWED**

NMR: 76 (Varian Associates NMR Spectra Catalogue)[Weast, R.C. and M.J. Astle. CRC Handbook of Data on OrganicCompounds. Volumes I and II. Boca Raton, FL: CRC Press Inc. 1985.,p.V1 334]**PEER REVIEWED**

MASS: 68 (Atlas of Mass Spectral Data, John Wiley & Sons, New York)[Weast, R.C. and M.J. Astle. CRC Handbook of Data on OrganicCompounds. Volumes I and II. Boca Raton, FL: CRC Press Inc. 1985.,p.V1 334]**PEER REVIEWED**

Surface Tension:

24.6 dyne/cm @ 20 deg C[Kirk-Othmer Encyclopedia of Chemical Technology. 4th ed. Volumes 1:New York, NY. John Wiley and Sons, 1991-Present.,p. V14 980]**PEERREVIEWED**

Vapor Density:

2.41 (Air= 1)[Verschueren, K. Handbook of Environmental Data on Organic Chemicals.3rd ed. New York, NY: Van Nostrand Reinhold Co., 1996. 1281]**PEERREVIEWED**


Vapor Pressure:

91 mm Hg at 25 deg C[Alarie Y et al; Toxicol Appl Pharmacol 134: 92-99 (1995)]**PEERREVIEWED**

Relative Evaporation Rate:

EVAPORATION RATE: 2.7 (ETHER= 1)[Browning, E. Toxicity and Metabolism of Industrial Solvents. NewYork: American Elsevier, 1965. 421]**PEER REVIEWED**

Viscosity:

0.41 mPa.s @ 20 deg C[Kirk-Othmer Encyclopedia of Chemical Technology. 4th ed. Volumes 1:New York, NY. John Wiley and Sons, 1991-Present.,p. V14 980]**PEERREVIEWED**



SATURATED AIR CONCN IS 102,000 PPM @ 77.5 TORR, 20 DEG C[American Conference of Governmental Industrial Hygienists.Documentation of the Threshold Limit Values and Biological ExposureIndices. 5th ed. Cincinnati, OH:American Conference of GovernmentalIndustrial Hygienists, 1986. 395]**PEER REVIEWED**

HEAT OF SOLN (EST): -9 BTU/LB= -5 CAL/G= -0.2X10+5 JOULES/KG; RATIO OF SPECIFICHEATS OF VAPOR (GAS): 1.075; REID VAPOR PRESSURE: 3.5 PSIA[U.S. Coast Guard, Department of Transportation. CHRIS - HazardousChemical Data. Volume II. Washington, D.C.: U.S. Government PrintingOffice, 1984-5.]**PEER REVIEWED**

CONVERSION FACTORS: 1 PPM= 2.94 MG/CU M; 1 MG/CU M= 0.340 PPM[Verschueren, K. Handbook of Environmental Data on Organic Chemicals.3rd ed. New York, NY: Van Nostrand Reinhold Co., 1996. 1282]**PEERREVIEWED**

Heat of fusion: 8.44 kJ/mole[Lide, D.R. (ed.). CRC Handbook of Chemistry and Physics. 76th ed.Boca Raton, FL: CRC Press Inc., 1995-1996.,p. 6-133]**PEER REVIEWED**

Coefficient of expansion= 0.00076/deg F; electrical conductivity= 1.0X10-7 ohms @ 25 deg C[Flick, E.W. Industrial Solvents Handbook. 3rd ed. Park Ridge, NJ:


Noyes Publications, 1985. 473]**PEER REVIEWED**


It is lighter than water ... and may be expected to float while rapidly dissolving.[Association of American Railroads. Emergency Handling of HazardousMaterials in Surface Transportation. Washington, D.C.: Assoc. ofAmerican Railroads,Hazardous Materials Systems (BOE), 1987. 452]**PEERREVIEWED**

Henry's Law constant = 4.7X10-5 atm-cu m/mol at 25 deg C[Bhattacharaya SK et al; Water Res 30: 3099-3105 (1996)]**PEERREVIEWED**

Chemical Safety & Handling:

DOT Emergency Guidelines:

Fire or explosion: HIGHLY FLAMMABLE: Will be easily ignited by heat, sparks or flames. Vaporsmay form explosive mixtures with air. Vapors may travel to source of ignition and flash back. Mostvapors are heavier than air. They will spread along ground and collect in low or confined areas (sewers,basements, tanks). Vapor explosion hazard indoors, outdoors or in sewers. Some may polymerize (P)explosively when heated or involved in a fire. Runoff to sewer may create fire or explosion hazard.Containers may explode when heated. Many liquids are lighter than water.[U.S. Department of Transportation. 1996 North American EmergencyResponse Guidebook. A Guidebook for First Responders During theInitial Phase of aHazardous Materials/Dangerous Goods Incident. U.S.Department of Transportation (U.S. DOT) Research and Special ProgramsAdministration, Office of HazardousMaterials Initiatives and Training(DHM-50), Washington, D.C. (1996).,p. G-127]**PEER REVIEWED**

Health: Inhalation or contact with material may irritate or burn skin and eyes. Fire may produce irritating,corrosive and/or toxic gases. Vapors may cause dizziness or suffocation. Runoff from fire control maycause pollution.[U.S. Department of Transportation. 1996 North American EmergencyResponse Guidebook. A Guidebook for First Responders During theInitial Phase of aHazardous Materials/Dangerous Goods Incident. U.S.Department of Transportation (U.S. DOT) Research and Special ProgramsAdministration, Office of HazardousMaterials Initiatives and Training(DHM-50), Washington, D.C. (1996).,p. G-127]**PEER REVIEWED**

Public safety: CALL Emergency Response Telephone Number. ... Isolate spill or leak area immediatelyfor at least 25 to 50 meters (80 to 160 feet) in all directions. Keep unauthorized personnel away. Stayupwind. Keep out of low areas. Ventilate closed spaces before entering.[U.S. Department of Transportation. 1996 North American EmergencyResponse Guidebook. A Guidebook for First Responders During the


Initial Phase of aHazardous Materials/Dangerous Goods Incident. U.S.Department of Transportation (U.S. DOT) Research and Special ProgramsAdministration, Office of HazardousMaterials Initiatives and Training(DHM-50), Washington, D.C. (1996).,p. G-127]**PEER REVIEWED**

Protective clothing: Wear positive pressure self-contained breathing apparatus (SCBA). Structuralfirefighters' protective clothing will only provide limited protection.[U.S. Department of Transportation. 1996 North American EmergencyResponse Guidebook. A Guidebook for First Responders During theInitial Phase of aHazardous Materials/Dangerous Goods Incident. U.S.Department of Transportation (U.S. DOT) Research and Special ProgramsAdministration, Office of HazardousMaterials Initiatives and Training(DHM-50), Washington, D.C. (1996).,p. G-127]**PEER REVIEWED**

Evacuation: Large spill: Consider initial downwind evacuation for at least 300 meters (1000 feet). Fire: Iftank, rail car or tank truck is involved in a fire, ISOLATE for 800 meters (1/2 mile) in all directions; also,consider initial evacuation for 800 meters (1/2 mile) in all directions.[U.S. Department of Transportation. 1996 North American EmergencyResponse Guidebook. A Guidebook for First Responders During theInitial Phase of aHazardous Materials/Dangerous Goods Incident. U.S.Department of Transportation (U.S. DOT) Research and Special ProgramsAdministration, Office of HazardousMaterials Initiatives and Training(DHM-50), Washington, D.C. (1996).,p. G-127]**PEER REVIEWED**

Fire: CAUTION: All these products have a very low flash point: Use of water spray when fighting firemay be inefficient. Small fires: Dry chemical, CO2, water spray or alcohol-resistant foam. Large fires:Water spray, fog or alcohol-resistant foam. Do not use straight streams. Move containers from fire area ifyou can do it without risk. Fire involving tanks or car/trailer loads: Fight fire from maximum distance oruse unmanned hose holders or monitor nozzles. Cool containers with flooding quantities of water untilwell after fire is out. Withdraw immediately in case of rising sound from venting safety devices ordiscoloration of tank. ALWAYS stay away from the ends of tanks. For massive fire, use unmanned hoseholders or monitor nozzles; if this is impossible, withdraw from area and let fire burn.[U.S. Department of Transportation. 1996 North American EmergencyResponse Guidebook. A Guidebook for First Responders During theInitial Phase of aHazardous Materials/Dangerous Goods Incident. U.S.Department of Transportation (U.S. DOT) Research and Special ProgramsAdministration, Office of HazardousMaterials Initiatives and Training(DHM-50), Washington, D.C. (1996).,p. G-127]**PEER REVIEWED**

Spill or leak: ELIMINATE all ignition sources (no smoking, flares, sparks or flames in immediate area).All equipment used when handling the product must be grounded. Do not touch or walk through spilledmaterial. Stop leak if you can do it without risk. Prevent entry into waterways, sewers, basements orconfined areas. A vapor suppressing foam may be used to reduce vapors. Absorb or cover with dry earth,sand or other non-combustible material and transfer to containers. Use clean non-sparking tools to collectabsorbed material. Large spills: Dike far ahead of liquid spill for later disposal. Water spray may reducevapor; but may not prevent ignition in closed spaces.[U.S. Department of Transportation. 1996 North American Emergency


Response Guidebook. A Guidebook for First Responders During theInitial Phase of aHazardous Materials/Dangerous Goods Incident. U.S.Department of Transportation (U.S. DOT) Research and Special ProgramsAdministration, Office of HazardousMaterials Initiatives and Training(DHM-50), Washington, D.C. (1996).,p. G-127]**PEER REVIEWED**

First aid: Move victim to fresh air. Call emergency medical care. Apply artificial respiration if victim isnot breathing. Administer oxygen if breathing is difficult. Remove and isolate contaminated clothing andshoes. In case of contact with substance, immediately flush skin or eyes with running water for at least 20minutes. Wash skin with soap and water. Keep victim warm and quiet. Ensure that medical personnel areaware of the material(s) involved, and take precautions to protect themselves.[U.S. Department of Transportation. 1996 North American EmergencyResponse Guidebook. A Guidebook for First Responders During theInitial Phase of aHazardous Materials/Dangerous Goods Incident. U.S.Department of Transportation (U.S. DOT) Research and Special ProgramsAdministration, Office of HazardousMaterials Initiatives and Training(DHM-50), Washington, D.C. (1996).,p. G-127]**PEER REVIEWED**

Odor Threshold:

Odor low= 0.7375 mg/cu m; Odor high= 147.5 mg/cu m.[Ruth JH; Am Ind Hyg Assoc J 47: A-142-51 (1986)]**PEER REVIEWED**

Detection limit in water: 5.00x10+1 ppm (purity not specified)[Fazzalari, F.A. (ed.). Compilation of Odor and Taste Threshold ValuesData. ASTM Data Series DS 48A (Committee E-18). Philadelphia, PA:American Society for Testing and Materials, 1978. 24]**PEER REVIEWED**

Recognition in air: 1.00x10+1 ppm (chemically pure)[Fazzalari, F.A. (ed.). Compilation of Odor and Taste Threshold ValuesData. ASTM Data Series DS 48A (Committee E-18). Philadelphia, PA:American Society for Testing and Materials, 1978. 24]**PEER REVIEWED**

Detection limit in air: 2.00x10+1 ppm (purity not specified)[Fazzalari, F.A. (ed.). Compilation of Odor and Taste Threshold ValuesData. ASTM Data Series DS 48A (Committee E-18). Philadelphia, PA:American Society for Testing and Materials, 1978. 24]**PEER REVIEWED**

Recognition in air: 5.50x10+1 ppm (purity not specified)[Fazzalari, F.A. (ed.). Compilation of Odor and Taste Threshold ValuesData. ASTM Data Series DS 48A (Committee E-18). Philadelphia, PA:American Society for Testing and Materials, 1978. 24]**PEER REVIEWED**





Fire Potential:

Highly flammable liquid.[Lewis, R.J. Sax's Dangerous Properties of Industrial Materials. 9thed. Volumes 1-3. New York, NY: Van Nostrand Reinhold, 1996.2239]**PEER REVIEWED**

NFPA Hazard Classification:

Health: 1. 1= Materials that, on exposure, would cause irritation, but only minor residual injury,including those requiring the use of an approved air-purifying respirator. These materials are onlyslightly hazardous to health and breathing protection is needed.[National Fire Protection Guide. Fire Protection Guide on HazardousMaterials. 10 th ed. Quincy, MA: National Fire Protection Association,1991.,p. 325M-69]**PEER REVIEWED**

Flammability: 3. 3= Includes Class IB and IC flammable liquids and materials that can be easily ignitedunder almost all normal temp conditions. Water may be ineffective in controlling or extinguishing firesin such materials.[National Fire Protection Guide. Fire Protection Guide on HazardousMaterials. 10 th ed. Quincy, MA: National Fire Protection Association,1991.,p. 325M-69]**PEER REVIEWED**

Reactivity: 0. 0= Includes materials that are normally stable, even under fire exposure conditions, andthat do not react with water. Normal fire fighting procedures may be used.[National Fire Protection Guide. Fire Protection Guide on HazardousMaterials. 10 th ed. Quincy, MA: National Fire Protection Association,1991.,p. 325M-69]**PEER REVIEWED**

Flammable Limits:

LOWER 1.4% @ 93 DEG C (200 DEG F), UPPER 11.4% @ 93 DEG C (200 DEG F)[National Fire Protection Guide. Fire Protection Guide on HazardousMaterials. 10 th ed. Quincy, MA: National Fire Protection Association,1991.,p. 325M-69]**PEER REVIEWED**

Flash Point:

-9 deg C (16 deg F) closed cup[National Fire Protection Guide. Fire Protection Guide on HazardousMaterials. 10 th ed. Quincy, MA: National Fire Protection Association,1991.,p. 325M-69]**PEER REVIEWED**

22 deg F (Tag open cup)


[Lewis, R.J. Sax's Dangerous Properties of Industrial Materials. 9thed. Volumes 1-3. New York, NY: Van Nostrand Reinhold, 1996.2239]**PEER REVIEWED**

Autoignition Temperature:

404 deg C (759 deg F)[National Fire Protection Guide. Fire Protection Guide on HazardousMaterials. 10 th ed. Quincy, MA: National Fire Protection Association,1991.,p. 325M-69]**PEER REVIEWED**

Fire Fighting Procedures:

ALC FOAM, DRY CHEMICAL, OR CARBON DIOXIDE[U.S. Coast Guard, Department of Transportation. CHRIS - HazardousChemical Data. Volume II. Washington, D.C.: U.S. Government PrintingOffice, 1984-5.]**PEER REVIEWED**

If material on fire or involved in fire: Do not extinguish fire unless flow can be stopped or safelyconfined. Use water in flooding quantities as fog. Solid streams of water may be ineffective. Cool allaffected containers with flooding quantities of water. Apply water from as far a distance as possible. Usealcohol foam, dry chemical or carbon dioxide.[Association of American Railroads. Emergency Handling of HazardousMaterials in Surface Transportation. Washington, DC: Association ofAmerican Railroads, Bureau of Explosives, 1994. 704]**PEER REVIEWED**

Flammable. Flashback along vapor trail may occur. Vapor may explode if ignited in an enclosed area.Extinguish with dry chemical, alcohol foam, or carbon dioxide. Water may be ineffective on fire. Coolexposed containers with water.[Prager, J.C. Environmental Contaminant Reference Databook Volume 1.New York, NY: Van Nostrand Reinhold, 1995. 350]**PEER REVIEWED**

Firefighting Hazards:

Flashback along vapor trail may occur.[Prager, J.C. Environmental Contaminant Reference Databook Volume 1.New York, NY: Van Nostrand Reinhold, 1995. 350]**PEER REVIEWED**

Explosive Limits & Potential:

UPPER 10%; LOWER 1.8%[International Labour Office. Encyclopedia of Occupational Health andSafety. Vols. I&II. Geneva, Switzerland: International Labour Office,1983. 1171]**PEER REVIEWED**


Avoid copper[DLA/DOD; Hazardous Materials Info System #6810-00-N00-0021(1982)]**PEER REVIEWED**


Incompatible with chloroform, hydrogen peroxide, nitric acid, potassium t-butoxide, and 2-propanol.[Bretherick, L. Handbook of Reactive Chemical Hazards. 4th ed. Boston,MA: Butterworth-Heinemann Ltd., 1990 465]**PEER REVIEWED**


Strong oxidizers, amines, ammonia, inorganic acids, caustics, copper, isocyanates, pyridines.[NIOSH. NIOSH Pocket Guide to Chemical Hazards. DHHS (NIOSH)Publication No. 97-140. Washington, D.C. U.S. Government PrintingOffice, 1997. 36]**QC REVIEWED**

Reaction with hydrogen peroxide + nitric acid forms a heat- and shock-sensitive explosive product.Ignition on contact with potassium t-butoxide. Mixture with 2-propanol will produce explosive peroxidesduring storage. Vigorous reaction with chloroform + alkali. Incompatible with chlorosulfonic acid;oleum.[Lewis, R.J. Sax's Dangerous Properties of Industrial Materials. 9thed. Volumes 1-3. New York, NY: Van Nostrand Reinhold, 1996.2239]**PEER REVIEWED**

Hazardous Decomposition:

MEK in air is rapidly decomposed by photochemical processes, mainly through oxidation by hydroxylfree radicals as well as some decomposition by direct photolysis ... /with a/ half-life of 5.4 hr forphotochemical decomposition in urban atmospheres.[WHO; Environ Health Criteria 143: Methyl Ethyl Ketone p.36(1993)]**PEER REVIEWED**

When heated to decomposition it emits acrid smoke and fumes.[Lewis, R.J. Sax's Dangerous Properties of Industrial Materials. 9thed. Volumes 1-3. New York, NY: Van Nostrand Reinhold, 1996.2239]**PEER REVIEWED**

Immediately Dangerous to Life or Health:

3000 ppm[NIOSH. NIOSH Pocket Guide to Chemical Hazards. DHHS (NIOSH)Publication No. 97-140. Washington, D.C. U.S. Government PrintingOffice, 1997. 36]**QC REVIEWED**

Protective Equipment & Clothing:

ORG CANISTER OR AIR PACK; PLASTIC GLOVES[U.S. Coast Guard, Department of Transportation. CHRIS - HazardousChemical Data. Volume II. Washington, D.C.: U.S. Government Printing


Office, 1984-5.]**PEER REVIEWED**

Skin contact should be avoided by the use of protective gloves; goggles may also be necessary to preventeye contact. /Ketones/[International Labour Office. Encyclopedia of Occupational Health andSafety. Vols. I&II. Geneva, Switzerland: International Labour Office,1983. 1173]**PEER REVIEWED**

Breakthrough times greater than one hour reported by (normally) two or more testers were found forbutyl rubber gloves.[ACGIH; Guidelines Select of Chem Protect Clothing Volume #1 FieldGuide p.68 (1983)]**PEER REVIEWED**

Breakthrough times less (usually significantly less) than one hour reported by (normally) two or moretesters were found for natural rubber latex gloves, unsupported; neoprene/natural rubber blend; nitrilerubber glove, unsupported; polyethylene glove; polyvinyl alcohol glove, supported; polyvinyl chlorideglove, unsupported; and viton, raw material.[ACGIH; Guidelines Select of Chem Protect Clothing Volume #1 FieldGuide p.68 (1983)]**PEER REVIEWED**

Wear appropriate personal protective clothing to prevent skin contact.[NIOSH. NIOSH Pocket Guide to Chemical Hazards. DHHS (NIOSH)Publication No. 97-140. Washington, D.C. U.S. Government PrintingOffice, 1997. 36]**QC REVIEWED**

Wear appropriate eye protection to prevent eye contact.[NIOSH. NIOSH Pocket Guide to Chemical Hazards. DHHS (NIOSH)Publication No. 97-140. Washington, D.C. U.S. Government PrintingOffice, 1997. 36]**QC REVIEWED**

Eyewash fountains should be provided in areas where there is any possbility that workers could beexposed to the substance; this is irrespective of the recommendation involving the wearing of eyeprotection.[NIOSH. NIOSH Pocket Guide to Chemical Hazards. DHHS (NIOSH)Publication No. 97-140. Washington, D.C. U.S. Government PrintingOffice, 1997. 36]**QC REVIEWED**

Recommendations for respirator selection. Max concn for use: 3000 ppm. Respirator Class(es): Anysupplied-air respirator operated in a continuous flow mode. eye protection needed. Any powered,air-purifying respirator with organic vapor cartridge(s). Eye protection needed. Any chemical cartridgerespirator with a full facepiece and organic vapor cartridge(s). Any air-purifying, full-facepiece respirator(gas mask) with a chin-style, front- or back-mounted organic vapor canister. Any self-containedbreathing apparatus with a full facepiece. Any supplied-air respirator with a full facepiece.[NIOSH. NIOSH Pocket Guide to Chemical Hazards. DHHS (NIOSH)Publication No. 97-140. Washington, D.C. U.S. Government PrintingOffice, 1997. 36]**QC REVIEWED**

Recommendations for respirator selection. Condition: Emergency or planned entry into unknown concnor IDLH conditions: Respirator Class(es): Any self-contained breathing apparatus that has a full


facepiece and is operated in a pressure-demand or other positive pressure mode. Any supplied-airrespirator that has a full face piece and is operated in pressure-demand or other positive pressure mode incombination with an auxiliary self-contained breathing apparatus operated in pressure-demand or otherpositive pressure mode.[NIOSH. NIOSH Pocket Guide to Chemical Hazards. DHHS (NIOSH)Publication No. 97-140. Washington, D.C. U.S. Government PrintingOffice, 1997. 36]**QC REVIEWED**

Recommendations for respirator selection. Condition: Escape from suddenly occurring respiratoryhazards: Respirator Class(es): Any air-purifying, full-facepiece respirator (gas mask) with a chin-style,front- or back-mounted organic vapor canister. Any appropriate escape-type, self-contained breathingapparatus.[NIOSH. NIOSH Pocket Guide to Chemical Hazards. DHHS (NIOSH)Publication No. 97-140. Washington, D.C. U.S. Government PrintingOffice, 1997. 36]**QC REVIEWED**


Work practices and industrial hygiene techniques should minimize the volatilization of ketones in theworkroom air in order to ensure that the exposure limits are not exceeded. /Ketones/[International Labour Office. Encyclopedia of Occupational Health andSafety. Vols. I&II. Geneva, Switzerland: International Labour Office,1983. 1173]**PEER REVIEWED**

If material not on fire and not involved in fire: Keep sparks, flames, and other sources of ignition away.Keep material out of water sources and sewers. Build dikes to contain flow as necessary. Attempt to stopleak if without hazard. Use water spray to disperse vapors and dilute standing pools of liquid.[Association of American Railroads. Emergency Handling of HazardousMaterials in Surface Transportation. Washington, DC: Association ofAmerican Railroads, Bureau of Explosives, 1994. 704]**PEER REVIEWED**

Evacuation: If material leaking (not on fire) consider evacuation from downwind area based on amountof material spilled, location and weather conditions.[Association of American Railroads. Emergency Handling of HazardousMaterials in Surface Transportation. Washington, DC: Association ofAmerican Railroads, Bureau of Explosives, 1994. 704]**PEER REVIEWED**

Personnel protection: Avoid breathing vapors. Keep upwind. ... Do not handle broken packages withoutprotective equipment. Wash away any material which may have contacted the body with copiousamounts of water or soap and water.[Association of American Railroads. Emergency Handling of HazardousMaterials in Surface Transportation. Washington, DC: Association ofAmerican Railroads, Bureau of Explosives, 1994. 704]**PEER REVIEWED**

A major concern in the painting studio is solvents, /including methyl ethyl ketone/. ... Precautionsinclude ... use of dilution and local exhaust ventilation, control of storage areas, disposal of solventsoaked rags in covered containers, minimizing skin exposure and the use of respirators and otherpersonal protective equipment. The control of fire hazards is also important, since many of the solvents


are highly flammable.[Hart C; J Environ Health 49 (5): 282-6 (1987)]**PEER REVIEWED**

SRP: Local exhaust ventilation should be applied wherever there is an incidence of point sourceemissions or dispersion of regulated contaminants in the work area. Ventilation control of thecontaminant as close to its point of generation is both the most economical and safest method tominimize personnel exposure to airborne contaminants.**PEER REVIEWED**

Contact lenses should not be worn when working with this chemical.[NIOSH. NIOSH Pocket Guide to Chemical Hazards. DHHS (NIOSH)Publication No. 97-140. Washington, D.C. U.S. Government PrintingOffice, 1997. 36]**QC REVIEWED**

SRP: The scientific literature for the use of contact lenses in industry is conflicting. The benefit ordetrimental effects of wearing contact lenses depend not only upon the substance, but also on factorsincluding the form of the substance, characteristics and duration of the exposure, the uses of other eyeprotection equipment, and the hygiene of the lenses. However, there may be individual substances whoseirritating or corrosive properties are such that the wearing of contact lenses would be harmful to the eye.In those specific cases, contact lenses should not be worn. In any event, the usual eye protectionequipment should be worn even when contact lenses are in place.**PEER REVIEWED**

SRP: Contaminated protective clothing should be segregated in such a manner so that there is no directpersonal contact by personnel who handle, dispose, or clean the clothing. Quality assurance to ascertainthe completeness of the cleaning procedures should be implemented before the decontaminatedprotective clothing is returned for reuse by the workers.**PEER REVIEWED**

The worker should immediately wash the skin when it becomes contaminated.[NIOSH. NIOSH Pocket Guide to Chemical Hazards. DHHS (NIOSH)Publication No. 97-140. Washington, D.C. U.S. Government PrintingOffice, 1997. 36]**QC REVIEWED**

Work clothing that becomes wet should be immediately removed due to its flammability hazard.[NIOSH. NIOSH Pocket Guide to Chemical Hazards. DHHS (NIOSH)Publication No. 97-140. Washington, D.C. U.S. Government PrintingOffice, 1997. 36]**QC REVIEWED**

Stability/Shelf Life:

Stability during transport: stable[U.S. Coast Guard, Department of Transportation. CHRIS - HazardousChemical Data. Volume II. Washington, D.C.: U.S. Government PrintingOffice, 1984-5.]**PEER REVIEWED**

Shipment Methods and Regulations:

No person may /transport,/ offer or accept a hazardous material for transportation in commerce unless


that person is registered in conformance ... and the hazardous material is properly classed, described,packaged, marked, labeled, and in condition for shipment as required or authorized by ... /the hazardousmaterials regulations (49 CFR 171-177)./[49 CFR 171.2 (7/1/96)]**PEER REVIEWED**

The International Air Transport Association (IATA) Dangerous Goods Regulations are published by theIATA Dangerous Goods Board pursuant to IATA Resolutions 618 and 619 and constitute a manual ofindustry carrier regulations to be followed by all IATA Member airlines when transporting hazardousmaterials.[IATA. Dangerous Goods Regulations. 38th ed. Montreal, Canada andGeneva, Switzerland: International Air Transport Association,Dangerous Goods Board, January, 1997. 179]**PEER REVIEWED**

The International Maritime Dangerous Goods Code lays down basic principles for transportinghazardous chemicals. Detailed recommendations for individual substances and a number ofrecommendations for good practice are included in the classes dealing with such substances. A generalindex of technical names has also been compiled. This index should always be consulted whenattempting to locate the appropriate procedures to be used when shipping any substance or article.[IMDG; International Maritime Dangerous Goods Code; InternationalMaritime Organization p.3080 (1988)]**PEER REVIEWED**

Cleanup Methods:


Environmental considerations -- air spill: Apply water spray or mist to knock down vapors.[Association of American Railroads. Emergency Handling of HazardousMaterials in Surface Transportation. Washington, DC: Association ofAmerican Railroads, Bureau of Explosives, 1994. 704]**PEER REVIEWED**

Environmental considerations -- water spill: Use natural barriers or oil spill control booms to limit spilltravel. Remove trapped material with suction hoses.[Association of American Railroads. Emergency Handling of HazardousMaterials in Surface Transportation. Washington, DC: Association ofAmerican Railroads, Bureau of Explosives, 1994. 704]**PEER REVIEWED**


Environmental considerations -- land spill: Dig a pit, pond, lagoon, holding area to contain liquid or solidmaterial. /SRP: If time permits, pits, ponds, lagoons, soak holes, or holding areas should be sealed withan impermeable flexible membrane liner./ Absorb bulk liquid with fly ash, cement powder, orcommercial sorbents.[Association of American Railroads. Emergency Handling of HazardousMaterials in Surface Transportation. Washington, DC: Association ofAmerican Railroads, Bureau of Explosives, 1994. 704]**PEER REVIEWED**

Disposal Methods:

Generators of waste (equal to or greater than 100 kg/mo) containing this contaminant, EPA hazardouswaste number F005, must conform with USEPA regulations in storage, transportation, treatment anddisposal of waste.[40 CFR 240-280, 300-306, 702-799 (7/1/96)]**PEER REVIEWED**

Generators of waste (equal to or greater than 100 kg/mo) containing this contaminant, EPA hazardouswaste number U159, must conform with USEPA regulations in storage, transportation, treatment anddisposal of waste.[40 CFR 240-280, 300-306, 702-799 (7/1/96)]**PEER REVIEWED**

Incineration. Recommendable methods: Incineration, open burning, use as a fuel, evaporation, dischargeto sewer. Peer-review: Potentially contains peroxides which may be explosive. Evaporate small amt only.(Peer-review conclusions of an IRPTC expert consultation (May 1985))[United Nations. Treatment and Disposal Methods for Waste Chemicals(IRPTC File). Data Profile Series No. 5. Geneva, Switzerland: UnitedNations Environmental Programme, Dec. 1985. 116]**PEER REVIEWED**

A good candidate for fluidized bed incineration at a temperature range of 450 to 980 deg C and residencetimes of seconds for liquids and gases, and longer for solids. A good candidate for rotary kilnincineration at a temperature range of 820 to 1,600 deg C and residence times of seconds for liquids andgases, and hours for solids. A good candidate for liquid injection incineration at a temperature range of650 to 1,600 deg C and a residence time of 0.1 to 2 seconds.[USEPA; Engineering Handbook for Hazardous Waste Incineration p.3-14(1981) EPA 68-03-3025]**PEER REVIEWED**



Spray into incinerator or burn in paper packaging. More flammable solvent may be added.[Prager, J.C. Environmental Contaminant Reference Databook Volume 1.New York, NY: Van Nostrand Reinhold, 1995. 349]**PEER REVIEWED**


Occupational Exposure Standards:

OSHA Standards:

Permissible Exposure Limit: Table Z-1 8-hr Time Weighted Avg: 200 ppm (590 mg/cu m).[29 CFR 1910.1000 (7/1/98)]**QC REVIEWED**

Vacated 1989 OSHA PEL TWA 200 ppm (590 mg/cu m); STEL 300 ppm (885 mg/cu m) is stillenforced in some states.[NIOSH. NIOSH Pocket Guide to Chemical Hazards. DHHS (NIOSH)Publication No. 97-140. Washington, D.C. U.S. Government PrintingOffice, 1997. 360]**QC REVIEWED**


8 hr Time Weighted Avg (TWA) 200 ppm; Short Term Exposure Limit (STEL) 300 ppm[American Conference of Governmental Industrial Hygienists. ThresholdLimit Values (TLVs) for Chemical Substances and Physical AgentsBiological Exposure Indices for 1998. Cincinnati, OH: ACGIH, 1998.49]**QC REVIEWED**


NIOSH Recommendations:

Recommended Exposure Limit: 10 Hr Time-Weighted Avg: 200 ppm (590 mg/cu m).[NIOSH. NIOSH Pocket Guide to Chemical Hazards. DHHS (NIOSH)Publication No. 97-140. Washington, D.C. U.S. Government PrintingOffice, 1997. 36]**QC REVIEWED**

Recommended Exposure Limit: 15 Min Short-Term Exposure Limit: 300 ppm (885 mg/cu m).[NIOSH. NIOSH Pocket Guide to Chemical Hazards. DHHS (NIOSH)Publication No. 97-140. Washington, D.C. U.S. Government PrintingOffice, 1997. 36]**QC REVIEWED**



Manufacturing/Use Information:

Major Uses:


AS SOLVENT; IN THE SURFACE COATING INDUSTRY; MFR OF COLORLESS SYNTHETICRESINS, SMOKELESS POWDER[Budavari, S. (ed.). The Merck Index - An Encyclopedia of Chemicals,Drugs, and Biologicals. Whitehouse Station, NJ: Merck and Co., Inc.,1996. 1037]**PEER REVIEWED**

IN FABRIC COATING; IN ARTIFICIAL LEATHER MFR; IN LACQUER & VARNISH INDUSTRY;IN PHARMACEUTICALS & COSMETICS; IN SYNTHETIC RUBBER MFR; IN PRODUCTION OFLUBRICATING OILS[Browning, E. Toxicity and Metabolism of Industrial Solvents. NewYork: American Elsevier, 1965. 422]**PEER REVIEWED**

PAINT REMOVERS; CEMENTS & ADHESIVES; ORG SYNTHESIS; IN CLEANING FLUIDS[Lewis, R.J., Sr (Ed.). Hawley's Condensed Chemical Dictionary. 12thed. New York, NY: Van Nostrand Rheinhold Co., 1993 768]**PEERREVIEWED**

SOLVENT FOR COATINGS-ESP VINYL, NITROCELLULOSE & ACRYLIC[SRI]**PEER REVIEWED**

SOLVENT FOR ADHESIVES & MAGNETIC TAPES[SRI]**PEER REVIEWED**

EXTRACTION SOLVENT FOR LUBE OIL DEWAXING, AZEOTROPIC SEPN[SRI]**PEER REVIEWED**

SOLVENT FOR PRINTING INKS & IN CLEANING SOLNS[SRI]**PEER REVIEWED**

EXTRACTION SOLVENT FOR HARDWOOD PULPING & VEGETABLE OIL[SRI]**PEER REVIEWED**

OXIDN PROMOTER IN MFR OF TEREPHTHALIC ACID FROM P-XYLENE[SRI]**PEER REVIEWED**

SOLVENT & COSOLVENT IN PESTICIDE FORMULATIONS[SRI]**PEER REVIEWED**

FRAGRANCE & FLAVORING AGENT-EG, FOR CANDY & IN PERFUMES (FORMER USES)[SRI]**PEER REVIEWED**

CATALYST IN THE PRODN OF HYDRAZINE (NON-USA USE)[SRI]**PEER REVIEWED**

Used as a sterilizer for bacterial spores on surgical instruments, hypodermic needles/syringe, and dentalinstruments.[Purdue University; National Pesticide Information Retrieval System(1988)]**PEER REVIEWED**

... Solvent ... required for the polymerization processing of polystyrene, acrylonitrile-butadiene-styrene,


and styrene-butadiene-rubber.[Fishbein L; Industrial Hazards of Plastics and Synthetic Elastomersp.239-62 (1984)]**PEER REVIEWED**

Manufacturers:

Exxon Corp, Hq, 1251 Ave of the Americas, New York, NY 10020, (212) 333-1000; Exxon ChemicalCo, division, Exxon Chemical Americas, PO Box 3272, Houston, TX 77001; Production site: BatonRouge, LA 70821[SRI. 1996 Directory of Chemical Producers-United States of America.Menlo Park, CA: SRI International, 1996. 744]**PEER REVIEWED**

Hoechst Celanese Corp, Hq, Route 202-206 N, Somerville, NJ 08876, (201) 231-2000; Hoechst CelaneseChemical Group, Inc, 1250 Mockingbird Lane, Dallas, TX 75356-9320; Production site: Pampa, TX79065[SRI. 1996 Directory of Chemical Producers-United States of America.Menlo Park, CA: SRI International, 1996. 744]**PEER REVIEWED**

Shell Oil Co, Hq, One Shell Plaza, PO Box 2463, Houston, TX 77252-2463, (713) 241-6161; ShellChemical Co, division (address same as Hq); Production site: Norco, LA 70079[SRI. 1996 Directory of Chemical Producers-United States of America.Menlo Park, CA: SRI International, 1996. 745]**PEER REVIEWED**

Methods of Manufacturing:

OBTAINED BY REFLUXING METHYL ACETOACETATE & DIL SULFURIC ACID, OR BYOXIDATION OF SECONDARY BUTYL ALCOHOL; ALSO BY FERMENTATION.[Budavari, S. (ed.). The Merck Index - An Encyclopedia of Chemicals,Drugs, and Biologicals. Whitehouse Station, NJ: Merck and Co., Inc.,1996. 1037]**PEER REVIEWED**

DIRECT LIQUID-PHASE OXIDN OF BUTENES; BY-PRODUCT OF THE LIQUIDDEHYDROGENATION OF BUTENES TO BUTADIENE[SRI]**PEER REVIEWED**

Formulations/Preparations:

GRADES OF PURITY: 99.5+%[U.S. Coast Guard, Department of Transportation. CHRIS - HazardousChemical Data. Volume II. Washington, D.C.: U.S. Government PrintingOffice, 1984-5.]**PEER REVIEWED**

GRADE: TECHNICAL[Lewis, R.J., Sr (Ed.). Hawley's Condensed Chemical Dictionary. 12thed. New York, NY: Van Nostrand Rheinhold Co., 1993 768]**PEERREVIEWED**


SOLVENT FOR VINYL COATINGS, 30%; SOLVENT FOR ADHESIVES, 18%; SOLVENT FOR


NITROCELLULOSE COATINGS, 13%; SOLVENT FOR ACRYLIC COATINGS, 11%; SOLVENTFOR OTHER COATINGS, 7%; SOLVENT FOR MAGNETIC TAPES, 7%; EXTRACTIONSOLVENT FOR LUBE OIL DEWAXING, 5%; SOLVENT FOR PRINTING INKS, 5%; OTHER, 4%(1981)[SRI]**PEER REVIEWED**

Projected growth figure through 1983 is 4%. Production of industrial coatings was 3.8% higher in 1978than year before. Paint and varnish sales grew 13.6% during the same period.[Kavaler. Chem Market Reporter 1980]**PEER REVIEWED**



Demand 1995: 582 million pounds; 1996: 545 million pounds; 2000: 550 million pounds (includesexports)[Kavaler AR: Chemical Marketing Reporter. July 22, 1996]**PEERREVIEWED**

U. S. Production:

(1982) 4.68X10+8 lb[USITC. Syn Org Chem-U.S. Prod/Sales (1982)]**PEER REVIEWED**

(1980) demand: 3.9X10+11 g[Kavaler. Chem Market Reporter 1980]**PEER REVIEWED**

(1977) 2.32X10+11 G[SRI]**PEER REVIEWED**

(1986) 2.44X10+11 g[USITC SYN ORG CHEM-US PROD/SALES 1985 p.125]**PEER REVIEWED**

(1985) 5.37X10+8 lb[USITC. SYN ORG CHEM-U.S. PROD/SALES 1985 p.266]**PEER REVIEWED**

(1987) 671,859X10+3 lb[USITC. SYN ORG CHEM-U.S. PROD/SALES 1987 p.15-5]**PEER REVIEWED**


U. S. Imports:




(1985) 3.51X10+10 g[BUREAU OF THE CENSUS US IMPORTS FOR CONSUMPTION AND GENERAL IMPORTS1985 p.-580]**PEER REVIEWED**

5.20X10+7 lb[BUREAU OF THE CENSUS. US IMPORTS FOR CONSUMPTION AND GENERAL IMPORTS1986 P. 1-526]**PEER REVIEWED**

1995 imports amounted to about 24 million pounds.[Kavaler AR: Chemical Marketing Reporter. July 22, 1996]**PEERREVIEWED**

U. S. Exports:



(1985) 2.78X10+10 g[BUREAU OF THE CENSUS U S EXPORTS, SCHEDULE E, 1986 p2-76]**PEERREVIEWED**

(1987) 4.63X10+6 lb[BUREAU OF THE CENSUS. U S EXPORTS, SCHEDULE E, OCTOBER 1987,P.2-79]**PEER REVIEWED**

US exports totaled nearly 140 million pounds in 1995.[Kavaler AR; Chemical MArketing Reporter. July 22, 1996]**PEERREVIEWED**

Laboratory Methods:


HEAD SPACE MASS SPECTROMETRIC SCREENING TECHNIQUE FOR VOLATILES INBLOOD & POST-MORTEM TISSUES (LIVER, BRAIN, LUNG) IS DESCRIBED.[URICH RW ET AL; J ANAL TOXICOL 1 (5): 195 (1977)]**PEER REVIEWED**

Venous blood sampled after 2 or more hr of exposure. Processed by Gas Chromatography, FID. Range:0.1 to 8 ug/ml. Precision: 0.095 (1 ug/ml blood).[U.S. Department of Health and Human Services, Public Health Service.Centers for Disease Control, National Institute for Occupational


Safety and Health. NIOSHManual of Analytical Methods, 3rd ed. Volumes1 and 2 with 1985 supplement, and revisions. Washington, DC: U.S.Government Printing Office, February 1984.,p. V1 8002-1]**PEERREVIEWED**





GLASS TUBE PACKED WITH ACTIVATED CHARCOAL IS USED TO TAKE AN INTEGRATEDSAMPLE. GAS CHROMATOGRAPH EQUIPPED WITH A FLAME IONIZATION DETECTOR.[WHITE LD ET AL; AM IND HYG ASSOC J 31 (2): 225 (1970)]**PEERREVIEWED**



EPA Method 8015: Nonhalogenated Volatile Organics. For the analysis of solid waste, a representative


sample (solid or liquid) is collected in a standard 40 ml glass screw-cap VOA vial equipped with aTeflon-faced silicone septum. Sample agitation, as well as contamination of the collected sample withair, must be avoided. Two VOA vials are filled per sample location, then placed in separate plastic bagsfor shipment and storage. Samples can be analyzed by direct injection or purge-and trap gaschromatography. A temperature program is used in the gas chromatograph to separate the organiccompounds. Column 1 is an 8 ft by 0.1 in ID stainless steel or glass column packed with 1% SP-1000 onCarbopack-B 60/80 mesh or equivalent. Column 2 is a 6 ft by 0.1 in ID stainless steel or glass columnpacked with n-octane on Porasil-C 100/120 mesh (Durapak) or equivalent. Detection is achieved by aflame ionization detector (FID). Under the prescribed conditions, methyl ethyl ketone can be detectedusing this method. No statistical analysis was determined; specific method performance information willbe provided as it becomes available.[USEPA/Office of Solid Waste (OSW); Test Methods for Evaluating SolidWaste, Physical/Chemical Methods SW846 Methods (1986)]**PEERREVIEWED**



Calibrate each personal sampling pump with sampler in line. Break the ends and attach sampler topersonal sampling pump with flexible tubing. Sample at flow rate between 0.01 and 0.2 l/min for totalsample size of 1.0 to 12 l.[U.S. Department of Health and Human Services, Public Health Service.Centers for Disease Control, National Institute for OccupationalSafety and Health. NIOSHManual of Analytical Methods, 3rd ed. Volumes1 and 2 with 1985 supplement, and revisions. Washington, DC: U.S.Government Printing Office, February 1984.,p. V1 2500-1]**PEERREVIEWED**


ANALYTE: 2-BUTANONE; MATRIX: AIR; RANGE: 380-1240 MG/CU M; PROCEDURE:ADSORPTION ON CHARCOAL, DESORPTION WITH CARBON DISULFIDE, GC.[U.S. Department of Health, Education Welfare, Public Health Service.Center for Disease Control, National Institute for Occupational SafetyHealth. NIOSH Manual ofAnalytical Methods. 2nd ed. Volumes 1-7.Washington, DC: U.S. Government Printing Office, 1977-present.,p. V2S3-1]**PEER REVIEWED**


Special References:

Special Reports:

PANSON RD; WINEK CL, CLIN TOXICOL 17 (2): 271 (1980). REVIEW ARTICLE ON HUMAN &ANIMAL TOXICITY & MGMNT.

OPDYKE DL J; FOOD COSMET TOXICOL 15 (6): 627 (1977). TOXICOLOGY, PREPARATION,PHYSICAL PROPERTIES, METABOLISM, PHARMACOLOGY, TERATOGENICITY, USE INCOSMETICS & IN FOODS ARE REVIEWED.


Arbetarskyddsstyrelsen, Publikationsservice 171 (84): 133 (1985). Scientific basis for Swedishoccupational standards.


DHHS/ATSDR; Toxicological Profile for 2-Butanone (1992) ATSDR/TP-91/08


Synonyms and Identifiers:

Synonyms:

ACETONE, METHYL-**PEER REVIEWED**


BUTANONE**PEER REVIEWED**

2-BUTANONE**PEER REVIEWED**


BUTANONE 2 (FRENCH)**PEER REVIEWED**

Caswell No 569**PEER REVIEWED**

EPA Pesticide Chemical Code 044103**PEER REVIEWED**


Ethylmethylcetone (French)**PEER REVIEWED**


ETHYL METHYL KETONE**PEER REVIEWED**

FEMA no 2170**PEER REVIEWED**

KETONE, ETHYL METHYL**PEER REVIEWED**

Meetco**PEER REVIEWED**

MEK**PEER REVIEWED**

METHYL ACETONE**PEER REVIEWED**

Metiletilcetona (Spanish)**PEER REVIEWED**



AI3-07540 (USDA)**PEER REVIEWED**




Shipping Name/ Number DOT/UN/NA/IMO:

UN 1193; Ethyl methyl ketone


IMO 3.2; Ethyl methyl ketone

Standard Transportation Number:

49 092 43; Methyl ethyl ketone

EPA Hazardous Waste Number:

U159; A toxic waste when a discarded commercial chemical product or manufacturing chemicalintermediate or an off-specification commercial chemical product.

F005; A hazardous waste from nonspecific sources when a spent solvent.

RTECS Number:

NIOSH/EL6475000

Administrative Information:

Hazardous Substances Databank Number: 99

Last Revision Date: 20000324

Last Review Date: Reviewed by SRP on 9/18/1997

Update History:

Complete Update on 03/24/2000, 1 field added/edited/deleted.Complete Update on 02/02/2000, 1 field added/edited/deleted.Complete Update on 11/16/1999, 1 field added/edited/deleted.Complete Update on 09/21/1999, 1 field added/edited/deleted.Complete Update on 08/26/1999, 1 field added/edited/deleted.Complete Update on 07/20/1999, 5 fields added/edited/deleted.Complete Update on 03/29/1999, 2 fields added/edited/deleted.Field Update on 03/19/1999, 1 field added/edited/deleted.Complete Update on 03/01/1999, 1 field added/edited/deleted.Complete Update on 01/20/1999, 1 field added/edited/deleted.Complete Update on 11/12/1998, 1 field added/edited/deleted.Complete Update on 09/11/1998, 1 field added/edited/deleted.Complete Update on 06/02/1998, 1 field added/edited/deleted.Complete Update on 02/25/1998, 1 field added/edited/deleted.Complete Update on 01/26/1998, 82 fields added/edited/deleted.Field Update on 10/17/1997, 1 field added/edited/deleted.Field Update on 09/08/1997, 5 fields added/edited/deleted.Field Update on 08/13/1997, 5 fields added/edited/deleted.Complete Update on 03/27/1997, 2 fields added/edited/deleted.Complete Update on 02/24/1997, 1 field added/edited/deleted.Complete Update on 12/11/1996, 1 field added/edited/deleted.Complete Update on 06/06/1996, 1 field added/edited/deleted.Complete Update on 04/09/1996, 8 fields added/edited/deleted.


Field Update on 01/18/1996, 1 field added/edited/deleted.Complete Update on 11/10/1995, 1 field added/edited/deleted.Complete Update on 01/23/1995, 1 field added/edited/deleted.Complete Update on 12/19/1994, 1 field added/edited/deleted.Complete Update on 11/18/1994, 1 field added/edited/deleted.Complete Update on 09/16/1994, 1 field added/edited/deleted.Complete Update on 08/31/1994, 1 field added/edited/deleted.Complete Update on 07/28/1994, 1 field added/edited/deleted.Complete Update on 03/25/1994, 1 field added/edited/deleted.Complete Update on 08/07/1993, 1 field added/edited/deleted.Complete Update on 08/04/1993, 1 field added/edited/deleted.Field update on 12/10/1992, 1 field added/edited/deleted.Complete Update on 11/25/1992, 1 field added/edited/deleted.Complete Update on 10/07/1992, 1 field added/edited/deleted.Complete Update on 09/03/1992, 1 field added/edited/deleted.Complete Update on 04/27/1992, 1 field added/edited/deleted.Complete Update on 01/23/1992, 1 field added/edited/deleted.Complete Update on 05/21/1990, 1 field added/edited/deleted.Complete Update on 04/16/1990, 2 fields added/edited/deleted.Complete Update on 01/11/1990, 2 fields added/edited/deleted.Field update on 12/29/1989, 1 field added/edited/deleted.Complete Update on 07/28/1989, 85 fields added/edited/deleted.Field Update on 05/05/1989, 1 field added/edited/deleted.Complete Update on 08/15/1988, 102 fields added/edited/deleted.Complete Update on 03/31/1986

Record Length: 193690










METHYL ETHYL KETONE IS IMPLICATED AS THE CAUSE OF RETROBULBAR NEURITISIN PT WHO USED THE SOLVENT IN REMOVING PAINT FROM AN AIRPLANE HANGAR.

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[BERG EF; ANN OPHTHALMOL 3 (12): 1351 (1971)]**PEER REVIEWED**






HIGH ATM CONCN ... ARE IRRITATING TO THE EYES, NOSE, AND THROAT ANDPROLONGED EXPOSURE MAY PRODUCE CNS DEPRESSION ... NO UNTOWARD EFFECTSHAVE BEEN REPORTED FOR CHRONIC EXPOSURE TO LOW CONCN. PROLONGED SKINCONTACT MAY DEFAT THE SKIN AND PRODUCE DERMATITIS. IF SPLASHED IN THE EYESIT MAY PRODUCE PAINFUL IRRITATION AND CORNEAL INJURY.[Clayton, G.D., F.E. Clayton (eds.) Patty's Industrial Hygiene andToxicology. Volumes 2A, 2B, 2C, 2D, 2E, 2F: Toxicology. 4th ed. New







MEK (0.1 mL) rubbed into volar forearm skin daily for 18 days and left uncovered did not produce


persistent erythema or swelling ... A 5-min contact with 1.5 mL of analytical grade MEK confined to a20-mm circle on the forearm produced a temporary whitening of the skin, but no visible erythema,alteration in cutaneous blood flow or other indication of irritation to the skin ... .[WHO; Environ Health Criteria 143: Methyl Ethyl Ketone p.81(1993)]**PEER REVIEWED**

Long-term exposure of 51 Italian workers to MEK produced indications of neurotoxicity with slightly,but not significantly, reduced nerve conduction velocities and various other symptoms such as headache,loss of appetite and weight, GI upset, dizziness, dermatitis and muscular hypotrophy, but no clinicallyrecognizable neuropathy. ... There has been a brief report of chronic exposure of American workers, in afactory producing coated fabric, to 885-1770 mg MEK/cu m (300-600 ppm) in the apparent absence ofother solvents. ... Workers complained of dermatoses and numbness of fingers and arms.[WHO; Environ Health Criteria 143: Methyl Ethyl Ketone p.82(1993)]**PEER REVIEWED**



Two cases of acute poisoning in a raincoat manufacturing operation where the seams were waterproofedwith a resin dissolved in either acetone or MEK were reported. Samples of the workroom air indicatedthat the MEK concentration ranged from 398 to 561 ppm, whereas the acetone concentration ranged from330 to 495 ppm. Two female employees were reportedly affected by the solvent vapors on differentoccasions. The first complained of stomach distress and watery eyes one morning, and later was foundunconscious in a rest room. The employee had a strong acetone odor on her breath, but no acetonuriaupon admission to the local hospital. She was treated with a CNS stimulant and awoke immediately, butcomplained of a severe headache. The patient was discharged from the hospital on the day followingadmission. The second case followed the first one by 1 day and was apparently less severe. Theindividual fainted and convulsed at the work site but regained consciousness immediately afterwards. Atthe hospital she was confused and had a headache, but after 1 hr of observation she was allowed to returnhome.[Clayton, G.D., F.E. Clayton (eds.) Patty's Industrial Hygiene andToxicology. Volumes 2A, 2B, 2C, 2D, 2E, 2F: Toxicology. 4th ed. New



A case study where a male patient attempted suicide by ingesting approximately 100 ml of an adhesivecement that contained 39 percent cyclohexanone, 28% MEK, 18% acetone was presented. The individualreportedly drank about 720 ml of sake (10 percent ethanol) 30 min prior to drinking the adhesivesolution. The patient was unconscious when taken to a hospital about 2 hr after the ingestion of thesolvent mixture. Gastric lavage, plasma exchange, and charcoal hemoperfusion were all performed, andthe patient regained consciousness about 7 hr after ingestion; however, signs of systemic toxicitypersisted. High blood concentrations of a cyclohexanone metabolite (cyclohexanal) were thought to beresponsible for the coma, whereas the hyperglycemia was attributed to acetone.[Clayton, G.D., F.E. Clayton (eds.) Patty's Industrial Hygiene andToxicology. Volumes 2A, 2B, 2C, 2D, 2E, 2F: Toxicology. 4th ed. NewYork, NY: John Wiley & Sons Inc., 1993-1994. 1767]**PEER REVIEWED**



The pharmacokinetics of MEK in 70 male and female volunteers following a 4-hr inhalation exposureeither alone (200 ppm) or in combination with acetone (225 ppm, 1:1.25 ratio) was described. Blood andexpired air elimination data for the MEK-exposed individuals revealed on average that (1) MEKsteady-state breath levels of about 10 to 12 ppm were attained, (2) non-steady-state peak blood levels of3 to 4 ug/ml occurred, (3) no significant difference in uptake or elimination was observed for males andfemales, and (4) no appreciable interaction affecting elimination took place with the combinedexposures.[Clayton, G.D., F.E. Clayton (eds.) Patty's Industrial Hygiene and


Toxicology. Volumes 2A, 2B, 2C, 2D, 2E, 2F: Toxicology. 4th ed. NewYork, NY: John Wiley & Sons Inc., 1993-1994. 1769]**PEER REVIEWED**










Body Burden:








http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:1:care [21/04/2001 9:13:55 AM]






METHYL ETHYL KETONE IS IMPLICATED AS THE CAUSE OF RETROBULBAR NEURITISIN PT WHO USED THE SOLVENT IN REMOVING PAINT FROM AN AIRPLANE HANGAR.[BERG EF; ANN OPHTHALMOL 3 (12): 1351 (1971)]**PEER REVIEWED**


A workman splashed his eye accidentally /with methyl ethyl ketone/, but the next day had only slightconjunctival hyperemia and no residual corneal injury. Despite the mildness of the injury, in the next fewdays the affected eye developed severe anterior uveitis triggered by slight trauma.

http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:1:htox (1 of 5) [21/04/2001 9:13:58 AM]

[Grant, W.M. Toxicology of the Eye. 3rd ed. Springfield, IL: CharlesC. Thomas Publisher, 1986. 617]**PEER REVIEWED**




HIGH ATM CONCN ... ARE IRRITATING TO THE EYES, NOSE, AND THROAT ANDPROLONGED EXPOSURE MAY PRODUCE CNS DEPRESSION ... NO UNTOWARD EFFECTSHAVE BEEN REPORTED FOR CHRONIC EXPOSURE TO LOW CONCN. PROLONGED SKINCONTACT MAY DEFAT THE SKIN AND PRODUCE DERMATITIS. IF SPLASHED IN THE EYESIT MAY PRODUCE PAINFUL IRRITATION AND CORNEAL INJURY.[Clayton, G.D., F.E. Clayton (eds.) Patty's Industrial Hygiene andToxicology. Volumes 2A, 2B, 2C, 2D, 2E, 2F: Toxicology. 4th ed. NewYork, NY: John Wiley & Sons Inc., 1993-1994. 1748]**PEER REVIEWED**






MEK (0.1 mL) rubbed into volar forearm skin daily for 18 days and left uncovered did not producepersistent erythema or swelling ... A 5-min contact with 1.5 mL of analytical grade MEK confined to a20-mm circle on the forearm produced a temporary whitening of the skin, but no visible erythema,alteration in cutaneous blood flow or other indication of irritation to the skin ... .[WHO; Environ Health Criteria 143: Methyl Ethyl Ketone p.81(1993)]**PEER REVIEWED**

Long-term exposure of 51 Italian workers to MEK produced indications of neurotoxicity with slightly,but not significantly, reduced nerve conduction velocities and various other symptoms such as headache,loss of appetite and weight, GI upset, dizziness, dermatitis and muscular hypotrophy, but no clinicallyrecognizable neuropathy. ... There has been a brief report of chronic exposure of American workers, in afactory producing coated fabric, to 885-1770 mg MEK/cu m (300-600 ppm) in the apparent absence ofother solvents. ... Workers complained of dermatoses and numbness of fingers and arms.





Two cases of acute poisoning in a raincoat manufacturing operation where the seams were waterproofedwith a resin dissolved in either acetone or MEK were reported. Samples of the workroom air indicatedthat the MEK concentration ranged from 398 to 561 ppm, whereas the acetone concentration ranged from330 to 495 ppm. Two female employees were reportedly affected by the solvent vapors on differentoccasions. The first complained of stomach distress and watery eyes one morning, and later was foundunconscious in a rest room. The employee had a strong acetone odor on her breath, but no acetonuriaupon admission to the local hospital. She was treated with a CNS stimulant and awoke immediately, butcomplained of a severe headache. The patient was discharged from the hospital on the day followingadmission. The second case followed the first one by 1 day and was apparently less severe. Theindividual fainted and convulsed at the work site but regained consciousness immediately afterwards. Atthe hospital she was confused and had a headache, but after 1 hr of observation she was allowed to returnhome.[Clayton, G.D., F.E. Clayton (eds.) Patty's Industrial Hygiene andToxicology. Volumes 2A, 2B, 2C, 2D, 2E, 2F: Toxicology. 4th ed. NewYork, NY: John Wiley & Sons Inc., 1993-1994. 1767]**PEER REVIEWED**

A case study where a male patient attempted suicide by ingesting approximately 100 ml of an adhesivecement that contained 39 percent cyclohexanone, 28% MEK, 18% acetone was presented. The individualreportedly drank about 720 ml of sake (10 percent ethanol) 30 min prior to drinking the adhesivesolution. The patient was unconscious when taken to a hospital about 2 hr after the ingestion of thesolvent mixture. Gastric lavage, plasma exchange, and charcoal hemoperfusion were all performed, andthe patient regained consciousness about 7 hr after ingestion; however, signs of systemic toxicitypersisted. High blood concentrations of a cyclohexanone metabolite (cyclohexanal) were thought to beresponsible for the coma, whereas the hyperglycemia was attributed to acetone.[Clayton, G.D., F.E. Clayton (eds.) Patty's Industrial Hygiene andToxicology. Volumes 2A, 2B, 2C, 2D, 2E, 2F: Toxicology. 4th ed. New





The pharmacokinetics of MEK in 70 male and female volunteers following a 4-hr inhalation exposureeither alone (200 ppm) or in combination with acetone (225 ppm, 1:1.25 ratio) was described. Blood andexpired air elimination data for the MEK-exposed individuals revealed on average that (1) MEKsteady-state breath levels of about 10 to 12 ppm were attained, (2) non-steady-state peak blood levels of3 to 4 ug/ml occurred, (3) no significant difference in uptake or elimination was observed for males andfemales, and (4) no appreciable interaction affecting elimination took place with the combinedexposures.[Clayton, G.D., F.E. Clayton (eds.) Patty's Industrial Hygiene andToxicology. Volumes 2A, 2B, 2C, 2D, 2E, 2F: Toxicology. 4th ed. NewYork, NY: John Wiley & Sons Inc., 1993-1994. 1769]**PEER REVIEWED**






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http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:1:rtex [21/04/2001 9:14:01 AM]


Body Burden:




http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:1:body [21/04/2001 9:14:03 AM]







Clinical Effects:

SUMMARY OF EXPOSURE 0.2.1.1 ACUTE EXPOSURE o ACUTE EXPOSURE (ORAL) - Most available information concerns inhalational or dermal exposure. A few cases involving ingestion of methyl ethyl ketone (and co-ingestants) or ketone peroxide (with co-ingestants) have resulted in CNS depression, respiratory depression or corrosive effects and sequelae. o ACUTE INHALATION - The effects vary, depending on extent and duration of exposure. Eye, nose and throat irritation, nausea, headache, vertigo, incoordination, CNS depression, narcosis and cardiorespiratory failure can occur. In most cases, recovery is usually rapid and complete. o CHRONIC EXPOSURE - The major concern with chronic exposure is axonal neuropathy with secondary myelin damage; usually manifested as paresthesias and muscle weakness. Only six-carbon, linear chain ketones metabolized to gamma-diketones (such as methyl n-butyl ketone) are implicated. o EYE EXPOSURE - Splash contact causes irritation, which may be slight, moderate, or severe, depending on the ketone. Vapors can cause irritation and lacrimation.

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o ROUTES OF EXPOSURE - Ketones are absorbed by ingestion, inhalation, and dermal exposure. o RELATED COMPOUNDS - Exposure to ketone solvents (methyl ethyl ketone, methyl isobutyl ketone, etc) must be distinguished from exposure to the peroxides of these same ketones. KETONE PEROXIDES are highly reactive and corrosive. Management of ketone peroxide exposure is discussed in a separate document. HEENT 0.2.4.1 ACUTE EXPOSURE o Splash contact causes irritation, which may be slight, moderate, or severe, depending on the specific ketone; vapors may cause irritation and lacrimation. CARDIOVASCULAR 0.2.5.1 ACUTE EXPOSURE o Tachycardia may occur. RESPIRATORY 0.2.6.1 ACUTE EXPOSURE o Ingestion of significant amounts may cause respiratory depression. Inhalation exposure may produce an anesthetic type of respiratory depression, dyspnea, and gasping. Pulmonary aspiration may result in chemical pneumonitis. NEUROLOGIC 0.2.7.1 ACUTE EXPOSURE o Acute inhalation exposure causes a progression of CNS effects, from headache, vertigo, incoordination, narcosis, dizziness, and tremor, to coma. Peripheral neuropathy has been reported following exposure to methyl-n-butyl ketone and 2,5-hexanedione. Trimethylnonanone is not associated with narcosis. o Chronic exposure causes axonal neuropathy with secondary myelin damage, usually manifested as paresthesias and muscle weakness. Only six-carbon, linear chain ketones metabolized to gamma-diketones (such as methyl n-butyl ketone) are implicated. GASTROINTESTINAL 0.2.8.1 ACUTE EXPOSURE o Nausea and vomiting may occur. HEPATIC 0.2.9.1 ACUTE EXPOSURE o Ketones may potentiate the hepatotoxicity of halogenated hydrocarbons. They may also inhibit aromatic hydrocarbon metabolism. ACID-BASE


0.2.11.1 ACUTE EXPOSURE o Metabolic acidosis has been reported. DERMATOLOGIC 0.2.14.1 ACUTE EXPOSURE o Skin exposure to the liquid or vapor may result in dermatitis and paresthesias of affected areas. Contact urticaria has also been reported. REPRODUCTIVE HAZARDS o Limited studies have generally documented little or no effect of ketones on reproduction in experimental animals. Human data is lacking. 2,5-Hexanedione has an effect on spermatogenesis in male experimental animals. CARCINOGENICITY 0.2.21.1 IARC CATEGORY o The ketones are generally unclassified by IARC. Those agents evaluated by IARC have been classified as having insufficient evidence to determine human carcinogenicity. 0.2.21.2 HUMAN OVERVIEW o No adequate human studies exist for the agents in this category. 0.2.21.3 ANIMAL OVERVIEW o Experimental animal studies are limited, but are generally negative, and agents in this group have little mutagenic activity. GENOTOXICITY o Extremely limited data is available for this class of agents. For many specific ketones, no data is available. Some studies report positive findings, but this category of agents appears to be generally non-mutagenic or only weakly mutagenic.

Laboratory:


Treatment Overview:


ORAL EXPOSURE o With ingestion of small amounts the major concern is pulmonary aspiration and gastrointestinal decontamination is not recommended. With ingestion of large amounts there is potential for systemic toxicity from gastrointestinal absorption and GI decontamination is suggested, keeping in mind that pulmonary aspiration is still a concern. o If the patient is obtunded, seizing, or has significant alterations in mental status, a cuffed endotracheal tube should be inserted prior to gastric aspiration. 1. For moderate ingestions (less than 100 milliliters) activated charcoal alone is recommended. 2. For large ingestions that have occurred within the past hour, careful gastric aspiration followed by activated charcoal is recommended. a. The lavage tube should be flexible, well lubricated with a water soluble gel to minimize gagging and vomiting, and of a large enough diameter to minimize vomiting of gastric contents around the tube and potential pulmonary aspiration. b. After the tube is in place, evacuate gastric contents rapidly. Repeated instillation of fluid to wash out the stomach is NOT suggested as it probably does not significantly enhance the removal of liquids and may enhance the potential for pulmonary aspiration. c. Instill activated charcoal prior to withdrawing the tube. d. For ingestions that have occurred more than 2 hours ago, gastric decontamination is not likely to be of benefit and is generally not warranted. o Administer activated charcoal for moderate or large ingestions. 1. ACTIVATED CHARCOAL: Administer charcoal as slurry (240 mL water/30 g charcoal). Usual dose: 25 to 100 g in adults/adolescents, 25 to 50 g in children (1 to 12 years), and 1 g/kg in infants less than 1 year old. o ACIDOSIS - Correct severe acidosis (pH < 7.1) with intravenous sodium bicarbonate. About 1 to 2 milliequivalents/kilogram is a useful starting dose. Monitor arterial blood gases to guide bicarbonate therapy. INHALATION EXPOSURE o DECONTAMINATION: Move patient to fresh air. Monitor


for respiratory distress. If cough or difficulty in breathing develops, evaluate for respiratory tract irritation, bronchitis, or pneumonitis. Administer 100 percent humidified supplemental oxygen with assisted ventilation as required. EYE EXPOSURE o DECONTAMINATION: Exposed eyes should be irrigated with copious amounts of tepid water for at least 15 minutes. If irritation, pain, swelling, lacrimation, or photophobia persist, the patient should be seen in a health care facility. DERMAL EXPOSURE o DECONTAMINATION: Wash exposed area extremely thoroughly with soap and water. A physician may need to examine the area if irritation or pain persists. o Treat dermal irritation or burns with standard topical therapy. Patients developing dermal hypersensitivity reactions may require treatment with systemic or topical corticosteroids or antihistamines.

Range of Toxicity:




For immediate first aid: Ensure that adequate decontamination has been carried out. If victim is notbreathing, start artificial respiration, preferably with a demand-valve resuscitator, bag-valve-mask device,or pocket mask as trained. Perform CPR if necessary. Immediately flush contaminated eyes with gentlyflowing water. Do not induce vomiting. If vomiting occurs, lean patient forward or place on left side(head-down position, if possible) to maintain an open airway and prevent aspiration. Keep victim quietand maintain normal body temperature. Obtain medical attention. /Ketones and related compounds/[Bronstein, A.C., P.L. Currance; Emergency Care for Hazardous


Materials Exposure. 2nd ed. St. Louis, MO. Mosby Lifeline. 1994.237]**PEER REVIEWED**





For immediate first aid: Ensure that adequate decontamination has been carried out. If victim is notbreathing, start artificial respiration, preferably with a demand-valve resuscitator, bag-valve-mask device,or pocket mask as trained. Perform CPR if necessary. Immediately flush contaminated eyes with gentlyflowing water. Do not induce vomiting. If vomiting occurs, lean patient forward or place on left side(head-down position, if possible) to maintain an open airway and prevent aspiration. Keep victim quietand maintain normal body temperature. Obtain medical attention. /Ketones and related compounds/[Bronstein, A.C., P.L. Currance; Emergency Care for HazardousMaterials Exposure. 2nd ed. St. Louis, MO. Mosby Lifeline. 1994.237]**PEER REVIEWED**


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THE SINGLE DOSE ORAL TOXICITY ... HAS BEEN DETERMINED TO BE 3.3 G/KG ... FORRATS. MASSIVE DOSES MAY BE EXPECTED TO RESULT IN IRRITATION OF THE LUNG & .../CNS DEPRESSION/.[Patty, F. (ed.). Industrial Hygiene and Toxicology: Volume II:Toxicology. 2nd ed. New York: Interscience Publishers, 1963.1732]**PEER REVIEWED**




ANALYSIS OF PORPHYRIN CONTENT OF MURINE ERYTHROLEUKEMIA (MEL) CELLSINCUBATED WITH 2-BUTANONE SHOWED THAT INCR HEMOGLOBIN SYNTH WASACCOMPANIED BY ACCUM OF PORPHYRINS.

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[EBERT PS ET AL; CHEM BIOL INTERACT 36 (1): 61 (1981)]**PEERREVIEWED**








Groups of rats were exposed to 100 ppm hexane, 200 ppm methyl ethyl ketone (MEK), or fresh air in anexposure chamber 12 hr daily for 24 weeks. Body weight, motor nerve conduction velocity, distal motor


latency, and mixed conduction velocities were measured before exposure and after 4, 8, 12, 16, 20, and24 wk exposure. ... Exposure to 200 ppm MEK significantly increased motor nerve conduction velocity,and mixed conduction velocities and decreased distal motor latency after 4 week exposure; but at a laterstage no significant changes were found. Mixed exposure to 100 ppm hexane and 200 ppm MEKsignificantly decreased distal motor latency after 4 week exposure and decreased motor nerve conductionvelocity and mixed conduction velocities after 20 and 24 week exposure.[Takeuchi Y et al; Br J Ind Med 40 (2): 199-203 (1983)]**PEERREVIEWED**



Testing of a drop on rabbit eyes indicates moderate reversible injury, graded 5 on a scale of 1-10. Thecompound was tested externally on the eyes of rabbits, and, according to the degree of injury observedafter 24 hours, rated on a scale of 1 to 10. The most severely injurious substances have been rated 10.[Grant, W.M. Toxicology of the Eye. 3rd ed. Springfield, IL: CharlesC. Thomas Publisher, 1986. 617]**PEER REVIEWED**



... Cultures of mature organotypic cord ganglia were extracted from fetal mouse spinal cord with theattached dorsal root. MEK at 300 ug/ml nutrient fluid was added to cultures for periods of up to 7 weeks.Cultures were examined under microscope twice weekly for morphological changes and were sampled at3, 5, and 7 weeks for electron microscopy. Treated cultures remained viable for the 7 week exposure


period. After 6 to 7 weeks of exposure, distinct intraaxonal inclusion occurred along proximal and distalinternodes of occasional sensory peripheral nerves (PNS). The structures lengthened and darkenedthroughout the exposure period and were often associated with axoplasmic granularity. The earliestchange in cytoplasm was dispersion of Nissl bodies, which resulted in excessive numbers of freeribosomes or polyribosomal changes. There was a distension of neuronal cisternal systems. By week 5there were abnormal amounts of smooth or agranular endoplasmic reticulum which appeared swollenwith a translucent material. A swollen agranular recticulum was often associated with foci of axoplasmicdebris. By week 7, intra-axonal cores of debris and myelin whorls were documented in 25% of thecentral nervous system and sensory perpipheral nerves axons examined ultrastucturally. ...[Veronesi B; Neurotoxicology 5 (4): 31-43 (1984)]**PEER REVIEWED**


An oral dose of 1.5 g/kg to rats resulted in a 63% incr in liver triglycerides after 16 to 23 hr, but did notalter liver histology or incr either of two enzymes, serum glutamic-pyruvic transaminase (alaninetransferase (ALT)) and hepatic glucose-6-phosphatase ... Much smaller acute ip doses (0.049 to 0.194g/kg) to rats appeared not to damage the liver. A single oral dose (15 mmol/kg) of MEK did not affectthe hepatobiliary function of rats over an observation period of 10 to 96 hr. ... A graded series of singledoses of MEK to guinea-pigs revealed high sensitivity to small changes in dosage. The low dose (0.75g/kg) appeared to produce no liver damage, whereas 1.5 g/kg produced slight liver damage and 2.0 g/kgproduced major liver damage. These results also suggest that guinea-pigs and rats may be equallysensitive to MEK in terms of liver damage even though guinea-pigs survive acute exposure to higherconcn of MEK vapor than do rats ... .[WHO; Environ Health Criteria 143: Methyl Ethyl Ketone p.58(1993)]**PEER REVIEWED**





Female rats exposed to 14,750 mg/cu m (5,000 ppm) 6 hr/day, 5 days/wk for 90 days showed onlyslightly incr liver weight, slightly decr brain and spleen weights, and slightly altered blood chemistry incomparison with controls. Male rats receiving this exposure showed only a slightly incr liver weight. Atlower concn of MEK (3,688 and 7,375 mg/cu m (1,250 and 2,500 ppm)) there was only slightly incr liverweight for female rats and no significant differences for males in comparison with controls ... . In anothersubchronic inhalation study ... male and female rats were exposed to MEK concn of 3,700, 7,430 and14,870 mg/cu m (1,254, 2,518, and 5,041 ppm) 6 hr/day, 5 days/wk for 90 days. No significant effects onfood consumption, eyes or nervous system were observed. In addition, MEK-induced morphologicalchanges in the central or peripheral nervous system were detected.[WHO; Environ Health Criteria 143: Methyl Ethyl Ketone p.68(1993)]**PEER REVIEWED**






The effect of MEK on the alarm behavior of social insects has been studied. It was considered inactive inproducing alarm behavior in the ant Iridomyrmex preinosus ... the harvester ant Pogonomyrmex badius ...and the honeybee Apis Mellifera ... .[WHO; Environ Health Criteria 143: Methyl Ethyl Ketone p.96(1993)]**PEER REVIEWED**

The developmental effects observed at an MEK vapor concentration of 3000 ppm were reexamined.Pregnant Sprague-Dawley rats were exposed to 400, 1000, or 3000 ppm of MEK for 7 hr/day on days 6to 15 of gestation. There were no effects on maternal liver weight; however, a significant decrease inmaternal body weight gain was observed in the animals exposed to 3000 ppm of MEK. In addition, noneof the exposures affected the pregnancy rate, the number of implantations or fetal resorptions, the littersize, or the fetal body weight. Unlike the initial study, there were no gross or soft-tissue malformations atany exposure level; however, the 3000-ppm exposure caused a significant increase in the incidence ofdelayed skeletal ossifications (skull and neck) and an increase in the incidence of extra lumbar ribs. /Itwas/ concluded that MEK was not embryotoxic or teratogenic and only slightly fetotoxic in the rat atexposure concentrations of 3000 ppm.[Clayton, G.D., F.E. Clayton (eds.) Patty's Industrial Hygiene andToxicology. Volumes 2A, 2B, 2C, 2D, 2E, 2F: Toxicology. 4th ed. NewYork, NY: John Wiley & Sons Inc., 1993-1994. 1759]**PEER REVIEWED**









LD50 (24 hr) Mouse (male) ip 1.66 + or - 0.74 g/kg /From table/[WHO; Environ Health Criteria 143: Methyl Ethyl Ketone p.63(1993)]**PEER REVIEWED**




Ecotoxicity Values:








LC50 Pimephales promelas (fathead minnow) 3200 mg/L 96 hr /From table; pH 7.5, temp 25 deg C,hardness 42.2 mg/L calcium carbonate /[WHO; Environ Health Criteria 143: Methyl Ethyl Ketone p.99(1993)]**PEER REVIEWED**


LC50 Gambusia affinis (mosquito fish) 5600 mg/l 96-hr /From table; pH 7.8-8.3, room temp, hardnessnot specified/[WHO; Environ Health Criteria 143: Methyl Ethyl Ketone p.99(1993)]**PEER REVIEWED**



The ability of methyl ethyl ketone to induce morphological transformation in the BALB/3T3 mouse cellline (Cell Transformation Assay) was evaluated both in the presence and absence of added metabolicactivation by Aroclor-induced rat liver S9 fraction. Based on preliminary clonal toxicity determinations(exposure time=2 hrs), methyl ethyl ketone, diluted with phosphate buffered saline, was tested at 18, 13and 9ul/ml in the absence of metabolic activation, with cell survival ranging from 93.3% to 51.1%relative to the solvent control. Assays with metabolic activation were tested at 10, 8 and 6ul/ml (exposuretime=2 hrs), with cell survival ranging from 85.7% to 67.3%. None of the tested concentrations produced


significantly greater transformation frequencies (p > 0.05, Modified Poisson Distribution) relative to thesolvent control.[Microbiological Associates Inc.; Activity of Methyl Ethyl Ketone inthe Morphological Transformation Assay using BALB/3T3 Mouse EmbryoCells, Final Report, (1984), EPA Document No. 40-8444072, EPA FicheNo. OTS0507470] **UNREVIEWED**




The mutagenicity of methyl ethyl ketone (MEK) was evaluated in bacterial tester strains E. coli WP2and WP2uvrA and Salmonella TA98, TA100, TA1535, TA1537 and TA1538, and the yeastSaccharomyces cerevisiae tester strain JD1, both in the presence and absence of added metabolic


activation by Aroclor-induced rat liver S9 fraction. Based on preliminary bacterial toxicitydeterminations, MEK, diluted with DMSO, was tested for mutagenicity at concentrations up to 4000ug/plate in the bacterial tests and 5000 ug/plate in the yeast tests using the agar overlay method. MEKdid not cause a positive response in any of the bacterial tester strains, either with or without metabolicactivation.[Shell Sittingbourne Research Centre; Toxicity Studies with ChemicalSolvents: Short-Term in Vitro Tests for Genotoxic Activity with MethylEthyl Ketone. (1982), EPA Document No. 878210125, Fiche No.OTS0206206] **UNREVIEWED**







THE SINGLE DOSE ORAL TOXICITY ... HAS BEEN DETERMINED TO BE 3.3 G/KG ... FORRATS. MASSIVE DOSES MAY BE EXPECTED TO RESULT IN IRRITATION OF THE LUNG & .../CNS DEPRESSION/.[Patty, F. (ed.). Industrial Hygiene and Toxicology: Volume II:Toxicology. 2nd ed. New York: Interscience Publishers, 1963.1732]**PEER REVIEWED**




ANALYSIS OF PORPHYRIN CONTENT OF MURINE ERYTHROLEUKEMIA (MEL) CELLSINCUBATED WITH 2-BUTANONE SHOWED THAT INCR HEMOGLOBIN SYNTH WASACCOMPANIED BY ACCUM OF PORPHYRINS.[EBERT PS ET AL; CHEM BIOL INTERACT 36 (1): 61 (1981)]**PEERREVIEWED**


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Groups of Sprague-Dawley rats were exposed, by inhalation to ... methyl ethyl ketone (800 ppm, 2345mg/cu m) ... for 4 weeks. Increased liver weights and liver-to-body weight ratios were observed. Methyl


ethyl ketone depressed the formation of 2 metabolites of androstenedione but did not alter theconcentration of cytochrome p450 in companion in vitro microsomal metabolism studies.[Toftgard R et al; Scand J Work Environ Health 7 (1): 31-7(1981)]**PEER REVIEWED**


Testing of a drop on rabbit eyes indicates moderate reversible injury, graded 5 on a scale of 1-10. Thecompound was tested externally on the eyes of rabbits, and, according to the degree of injury observedafter 24 hours, rated on a scale of 1 to 10. The most severely injurious substances have been rated 10.[Grant, W.M. Toxicology of the Eye. 3rd ed. Springfield, IL: CharlesC. Thomas Publisher, 1986. 617]**PEER REVIEWED**



... Cultures of mature organotypic cord ganglia were extracted from fetal mouse spinal cord with theattached dorsal root. MEK at 300 ug/ml nutrient fluid was added to cultures for periods of up to 7 weeks.Cultures were examined under microscope twice weekly for morphological changes and were sampled at3, 5, and 7 weeks for electron microscopy. Treated cultures remained viable for the 7 week exposureperiod. After 6 to 7 weeks of exposure, distinct intraaxonal inclusion occurred along proximal and distalinternodes of occasional sensory peripheral nerves (PNS). The structures lengthened and darkenedthroughout the exposure period and were often associated with axoplasmic granularity. The earliestchange in cytoplasm was dispersion of Nissl bodies, which resulted in excessive numbers of freeribosomes or polyribosomal changes. There was a distension of neuronal cisternal systems. By week 5there were abnormal amounts of smooth or agranular endoplasmic reticulum which appeared swollenwith a translucent material. A swollen agranular recticulum was often associated with foci of axoplasmicdebris. By week 7, intra-axonal cores of debris and myelin whorls were documented in 25% of thecentral nervous system and sensory perpipheral nerves axons examined ultrastucturally. ...[Veronesi B; Neurotoxicology 5 (4): 31-43 (1984)]**PEER REVIEWED**



An oral dose of 1.5 g/kg to rats resulted in a 63% incr in liver triglycerides after 16 to 23 hr, but did notalter liver histology or incr either of two enzymes, serum glutamic-pyruvic transaminase (alaninetransferase (ALT)) and hepatic glucose-6-phosphatase ... Much smaller acute ip doses (0.049 to 0.194g/kg) to rats appeared not to damage the liver. A single oral dose (15 mmol/kg) of MEK did not affectthe hepatobiliary function of rats over an observation period of 10 to 96 hr. ... A graded series of singledoses of MEK to guinea-pigs revealed high sensitivity to small changes in dosage. The low dose (0.75g/kg) appeared to produce no liver damage, whereas 1.5 g/kg produced slight liver damage and 2.0 g/kgproduced major liver damage. These results also suggest that guinea-pigs and rats may be equallysensitive to MEK in terms of liver damage even though guinea-pigs survive acute exposure to higherconcn of MEK vapor than do rats ... .[WHO; Environ Health Criteria 143: Methyl Ethyl Ketone p.58(1993)]**PEER REVIEWED**





Female rats exposed to 14,750 mg/cu m (5,000 ppm) 6 hr/day, 5 days/wk for 90 days showed onlyslightly incr liver weight, slightly decr brain and spleen weights, and slightly altered blood chemistry incomparison with controls. Male rats receiving this exposure showed only a slightly incr liver weight. Atlower concn of MEK (3,688 and 7,375 mg/cu m (1,250 and 2,500 ppm)) there was only slightly incr liverweight for female rats and no significant differences for males in comparison with controls ... . In anothersubchronic inhalation study ... male and female rats were exposed to MEK concn of 3,700, 7,430 and14,870 mg/cu m (1,254, 2,518, and 5,041 ppm) 6 hr/day, 5 days/wk for 90 days. No significant effects onfood consumption, eyes or nervous system were observed. In addition, MEK-induced morphologicalchanges in the central or peripheral nervous system were detected.[WHO; Environ Health Criteria 143: Methyl Ethyl Ketone p.68(1993)]**PEER REVIEWED**





The effect of MEK on the alarm behavior of social insects has been studied. It was considered inactive inproducing alarm behavior in the ant Iridomyrmex preinosus ... the harvester ant Pogonomyrmex badius ...and the honeybee Apis Mellifera ... .



The developmental effects observed at an MEK vapor concentration of 3000 ppm were reexamined.Pregnant Sprague-Dawley rats were exposed to 400, 1000, or 3000 ppm of MEK for 7 hr/day on days 6to 15 of gestation. There were no effects on maternal liver weight; however, a significant decrease inmaternal body weight gain was observed in the animals exposed to 3000 ppm of MEK. In addition, noneof the exposures affected the pregnancy rate, the number of implantations or fetal resorptions, the littersize, or the fetal body weight. Unlike the initial study, there were no gross or soft-tissue malformations atany exposure level; however, the 3000-ppm exposure caused a significant increase in the incidence ofdelayed skeletal ossifications (skull and neck) and an increase in the incidence of extra lumbar ribs. /Itwas/ concluded that MEK was not embryotoxic or teratogenic and only slightly fetotoxic in the rat atexposure concentrations of 3000 ppm.[Clayton, G.D., F.E. Clayton (eds.) Patty's Industrial Hygiene andToxicology. Volumes 2A, 2B, 2C, 2D, 2E, 2F: Toxicology. 4th ed. NewYork, NY: John Wiley & Sons Inc., 1993-1994. 1759]**PEER REVIEWED**










LD50 (24 hr) Mouse (male) ip 1.66 + or - 0.74 g/kg /From table/[WHO; Environ Health Criteria 143: Methyl Ethyl Ketone p.63(1993)]**PEER REVIEWED**




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Ecotoxicity Values:







LC50 Pimephales promelas (fathead minnow) 3200 mg/L 96 hr /From table; pH 7.5, temp 25 deg C,hardness 42.2 mg/L calcium carbonate /[WHO; Environ Health Criteria 143: Methyl Ethyl Ketone p.99(1993)]**PEER REVIEWED**


LC50 Gambusia affinis (mosquito fish) 5600 mg/l 96-hr /From table; pH 7.8-8.3, room temp, hardnessnot specified/

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The mutagenicity of methyl ethyl ketone was evaluated in Salmonella tester strains TA98, TA100,

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TA1535, TA1537 and TA1538 (Ames Test), both in the presence and absence of added metabolicactivation by Aroclor-induced rat liver S9 fraction. Based on the results of the preliminary bacterialtoxicity determinations, methyl ethyl ketone, diluted with DMSO, was tested for mutagenicity atconcentrations up to 32 ul/plate (presence metabolic activation) and 16 ul/plate (absence metabolicactivation) using the preincubation technique. Methyl ethyl ketone did not cause a reproducible positiveresponse in any of the bacterial tester strains, either with or without metabolic activation.[Microbiological Associates, Inc.; Salmonella/Mammalian-MicrosomePreincubation Mutagenicity Assay (Ames Test), (1984), EPA Document No.40-8444072, Fiche No. OTS0507470] **UNREVIEWED**




The ability of methyl ethyl ketone to cause chromosome aberrations was evaluated in cultured rat (strainnot reported) liver cell line. Based on preliminary toxicity determinations, rat liver cultures were exposed


to 250, 500 or 1000 ug/ml and incubated for 24 hours. Two hours prior to the end of incubation,colcemid was added and at the end of incubation period 100 cells from each culture were analyzed. Noincrease (statistical analysis not reported) in the frequency of chromatid gaps, chromatid breaks or totalchromatid aberrations were observed in any of the cultures.[Sittingbourn Research Center; Toxicity Studies with ChemicalSolvents: Short Term In Vitro Tests for Genotoxic Activity with MethylEthyl Ketone, (1982), EPA Document No. 878210125, Fiche No. OTS0206206] **UNREVIEWED**












MEK has been reported to be a metabolic end product of natural gas (methane 88%, ethane 5%, propane5%, iso-butane 2%, with traces of t-butyl mercaptan and methyl acrylate) inhaled for 2 hr by ICR mice ...In an in vivo study of the metabolism of propane, n-butane and iso-butane inhaled for 1 hr by ICR mice,

http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:1:metab (1 of 8) [21/04/2001 9:14:32 AM]

it was found that n-butane gave rise to sec-butanol and MEK ... In vitro studies showed that mouse livermicrosomal preparations metabolized n-butane to sec-butanol, the precursor of MEK ... Inhalation bymale Sprague-Dawley rats of sec-butanol at concn of 5900 mg/cu m (2000 ppm) for 3 days or 1475mg/cu m (500 ppm) for 5 days caused marked enzyme induction of cytochrome P-450 in liver andkidney but other butanol isomers did not have this effect ... The authors concluded that the mechanism ofinduction was via the sec-butanol metabolite MEK.[WHO; Environ Health Criteria 143: Methyl Ethyl Ketone p.51(1993)]**PEER REVIEWED**



In a study on male Sprague-Dawley rats, pretreatment with MEK elevated total microsomal cytochromeP-450 and NADPH-dependent cytochrome-c-reductase, the rates of oxidation ofN-nitrosodimethylamine, benzphetamine and pentoxyresorufin, and also the levels of immunoreactiveprotein for both P-450 isozymes ... In a study of hepatotoxicity in rats, ... found that MEK incr livercytochrome P-450 content (33-86%) and glutathione-S-transferase (GST) activity (42-64%) but had noeffect on serum glutamate dehydrogenase (GLDH) activity. ... studied the effects on hepatic cytochromeP-450 activities of repeated daily doses of 1.87 mL/kg given by gavage to male Fischer-344 rats. Theactivity of 7-ethoxy coumarin-O-deethylase was incr by up to 500% after 1 to 7 days of MEK treatment,but there was practically no change in benzphetamine-N-demethylase activity. In another study in maleSprague-Dawley rats, admin of MEK by gavage cause an incr in hepatic acetanilide hydroxylase and amarginal incr in aminopyrine-N-demethylase activities ... .[WHO; Environ Health Criteria 143: Methyl Ethyl Ketone p.53(1993)]**PEER REVIEWED**








Percutaneous absorption of MEK appears to be rapid ... MEK was present in the exhaled air of humansubjects within 2.5-3.0 min after it was applied to normal skin of the forearm, and the concn of MEK inexhaled air reached a plateau in 2-3 hr. The rate of absorption was controlled mainly by the moisturecontent of the skin. With dry skin, absorption was slow, and it took 4-5 hr for the concn of MEK inexpired air to attain a plateau. With moist skin, absorption was very rapid initially. MEK was detected inexpired air in measurable concn within 30 sec after an application of MEK to the forearm, and a maxconcn in expired air, averaging 4X the plateau level for normal and dry skin, was achieved in 10-15 min.[WHO; Environ Health Criteria 143: Methyl Ethyl Ketone p.49(1993)]**PEER REVIEWED**

The absorption of MEK via the lungs was examined ... in a study of workers exposed in industrialworkplace. The MEK concn in alveolar and expired air correlated significantly with the environmentalconcn, and averaged 30% of the latter. In more recent studies ... values for pulmonary absorption rangingfrom 41.1% to 55.8% were obtained. ... Deeper inhalation incr the alveolar volume relative to the deadspace (the non-alveolar volume of the respiratory system), and thus incr the apparent absorption ... .[WHO; Environ Health Criteria 143: Methyl Ethyl Ketone p.49(1993)]**PEER REVIEWED**

Results of studies ... indicated a rapid transfer of MEK vapor into the blood stream. ... the concn of MEK


in the blood and urine were significantly correlated with the environmental concn, indicating rapidtransfer to the blood and thence to other tissues. In human volunteer subjects, exercise during exposuremarkedly incr the MEK level in blood in comparison with sedentary behavior ... indicating that the bloodMEK level also depended on the rate of uptake. ... also found significant correlations betweenenvironmental levels of MEK and amounts excreted in the urine of exposed workers. The concn of MEKin urine rose from essentially 0 to 70% of its max value during the first 2 hr of an 8-hr shift ... .[WHO; Environ Health Criteria 143: Methyl Ethyl Ketone p.50(1993)]**PEER REVIEWED**



... intraperitoneal injection of MEK in research on metabolism and toxicity, suggest that absorption fromthe peritoneal cavity is rapid.[WHO; Environ Health Criteria 143: Methyl Ethyl Ketone p.51(1993)]**PEER REVIEWED**


The results of in vitro measurements at 37 deg C of human tissue-gas partition coefficients, obtained byexposing samples of blood and tissue to a known concn of MEK ... The partition coefficients rangedfrom 96 to 162, but did not exceed 111, with the exception of whole blood (125), blood plasma (133) andfat (162). Other blood-gas partition coefficients measurements for MEK are 202 ... and 215 ... .[WHO; Environ Health Criteria 143: Methyl Ethyl Ketone p.51






Absorption of methylethylketone is rapid via inhalation and ingestion, and the compound is presumably amoderate skin penetrant as well. Since methylethylketone is both water and lipid soluble, it is ratherevenly distributed in tissues.[Zenz, C., O.B. Dickerson, E.P. Horvath. Occupational Medicine. 3rded. St. Louis, MO., 1994 149]**PEER REVIEWED**



... The biological half lives for elimination of acetone and MEK calculated on the basis of a first orderkinetic assumption were 3.9 hours and 49 minutes, respectively. ... Workers exposed to acetone or MEKfor 6 to 8 hours could expect to have a residual body burden of acetone the next morning, whereas MEKwould be essentially eliminated.[Brown WD et al; The Changing Nature of Work and Workforce,


Proceedings of the Third Joint US-Finish Science Symposium p.111-14(1986)]**PEER REVIEWED**



... reported a steady incr in blood concn during 4-hr exposures of human volunteer subjects to 590 mg/cum (200 ppm) and observed a rapid elimination of MEK, with half-lives of 30 min during the firstpost-exposure hr and 81 min thereafter. An inhalation study with two volunteer subjects exposed to MEKfor 4 hr at concn of 74,590 and 1,180 mg/cu m (25,200 and 400 ppm, respectively) indicated that thekinetics of MEK were dose dependent at higher exposure concn, i.e., much higher levels of MEK inblood were reached relative to inhaled concn, and the post-exposure elimination of MEK in blood wasslower (zero-order kinetics). Simulated exposure to MEK for 8 hr suggests that saturation kinetics arereached at about 295 mg/cu m (100 ppm) at rest and 148 mg/cu m (50 ppm) during light exercise ... .[WHO; Environ Health Criteria 143: Methyl Ethyl Ketone p.56(1993)]**PEER REVIEWED**



There is very limited info on the mechanisms of toxic action of MEK. Relatively high inhaled concn1,475-29,500 mg/cu m (500-10,000 ppm) caused pulmonary vasoconstriction and hypertension in catsand dogs ... From the toxicological point of view, interactions leading to the potentiation of effects,


particularly neurotoxicity, by other intrinsically toxic substances constitute the main hazard of MEK. Themechanisms underlying these interactions are incompletely known ... .[WHO; Environ Health Criteria 143: Methyl Ethyl Ketone p.57(1993)]**PEER REVIEWED**

Interactions:






... The toxic neuropathy induced by methyl ethyl ketone is clinically and morphologically identical withthat induced by n-hexane and methyl butyl ketone. Methyl ethyl ketone can act synergistically withn-hexane to produce toxic neuropathy.


[Alterkirch H et al; J Neurology 214: 137-52 (1977)]**PEER REVIEWED**















MEK has been reported to be a metabolic end product of natural gas (methane 88%, ethane 5%, propane5%, iso-butane 2%, with traces of t-butyl mercaptan and methyl acrylate) inhaled for 2 hr by ICR mice ...In an in vivo study of the metabolism of propane, n-butane and iso-butane inhaled for 1 hr by ICR mice,it was found that n-butane gave rise to sec-butanol and MEK ... In vitro studies showed that mouse livermicrosomal preparations metabolized n-butane to sec-butanol, the precursor of MEK ... Inhalation by

http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:1:metb (1 of 2) [21/04/2001 9:14:34 AM]

male Sprague-Dawley rats of sec-butanol at concn of 5900 mg/cu m (2000 ppm) for 3 days or 1475mg/cu m (500 ppm) for 5 days caused marked enzyme induction of cytochrome P-450 in liver andkidney but other butanol isomers did not have this effect ... The authors concluded that the mechanism ofinduction was via the sec-butanol metabolite MEK.[WHO; Environ Health Criteria 143: Methyl Ethyl Ketone p.51(1993)]**PEER REVIEWED**



In a study on male Sprague-Dawley rats, pretreatment with MEK elevated total microsomal cytochromeP-450 and NADPH-dependent cytochrome-c-reductase, the rates of oxidation ofN-nitrosodimethylamine, benzphetamine and pentoxyresorufin, and also the levels of immunoreactiveprotein for both P-450 isozymes ... In a study of hepatotoxicity in rats, ... found that MEK incr livercytochrome P-450 content (33-86%) and glutathione-S-transferase (GST) activity (42-64%) but had noeffect on serum glutamate dehydrogenase (GLDH) activity. ... studied the effects on hepatic cytochromeP-450 activities of repeated daily doses of 1.87 mL/kg given by gavage to male Fischer-344 rats. Theactivity of 7-ethoxy coumarin-O-deethylase was incr by up to 500% after 1 to 7 days of MEK treatment,but there was practically no change in benzphetamine-N-demethylase activity. In another study in maleSprague-Dawley rats, admin of MEK by gavage cause an incr in hepatic acetanilide hydroxylase and amarginal incr in aminopyrine-N-demethylase activities ... .[WHO; Environ Health Criteria 143: Methyl Ethyl Ketone p.53(1993)]**PEER REVIEWED**


http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:1:metb (2 of 2) [21/04/2001 9:14:34 AM]







Percutaneous absorption of MEK appears to be rapid ... MEK was present in the exhaled air of humansubjects within 2.5-3.0 min after it was applied to normal skin of the forearm, and the concn of MEK inexhaled air reached a plateau in 2-3 hr. The rate of absorption was controlled mainly by the moisturecontent of the skin. With dry skin, absorption was slow, and it took 4-5 hr for the concn of MEK inexpired air to attain a plateau. With moist skin, absorption was very rapid initially. MEK was detected inexpired air in measurable concn within 30 sec after an application of MEK to the forearm, and a maxconcn in expired air, averaging 4X the plateau level for normal and dry skin, was achieved in 10-15 min.[WHO; Environ Health Criteria 143: Methyl Ethyl Ketone p.49(1993)]**PEER REVIEWED**

The absorption of MEK via the lungs was examined ... in a study of workers exposed in industrialworkplace. The MEK concn in alveolar and expired air correlated significantly with the environmentalconcn, and averaged 30% of the latter. In more recent studies ... values for pulmonary absorption rangingfrom 41.1% to 55.8% were obtained. ... Deeper inhalation incr the alveolar volume relative to the deadspace (the non-alveolar volume of the respiratory system), and thus incr the apparent absorption ... .

http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:1:ade (1 of 3) [21/04/2001 9:14:37 AM]


Results of studies ... indicated a rapid transfer of MEK vapor into the blood stream. ... the concn of MEKin the blood and urine were significantly correlated with the environmental concn, indicating rapidtransfer to the blood and thence to other tissues. In human volunteer subjects, exercise during exposuremarkedly incr the MEK level in blood in comparison with sedentary behavior ... indicating that the bloodMEK level also depended on the rate of uptake. ... also found significant correlations betweenenvironmental levels of MEK and amounts excreted in the urine of exposed workers. The concn of MEKin urine rose from essentially 0 to 70% of its max value during the first 2 hr of an 8-hr shift ... .[WHO; Environ Health Criteria 143: Methyl Ethyl Ketone p.50(1993)]**PEER REVIEWED**



... intraperitoneal injection of MEK in research on metabolism and toxicity, suggest that absorption fromthe peritoneal cavity is rapid.[WHO; Environ Health Criteria 143: Methyl Ethyl Ketone p.51(1993)]**PEER REVIEWED**


The results of in vitro measurements at 37 deg C of human tissue-gas partition coefficients, obtained byexposing samples of blood and tissue to a known concn of MEK ... The partition coefficients ranged


from 96 to 162, but did not exceed 111, with the exception of whole blood (125), blood plasma (133) andfat (162). Other blood-gas partition coefficients measurements for MEK are 202 ... and 215 ... .[WHO; Environ Health Criteria 143: Methyl Ethyl Ketone p.51(1993)]**PEER REVIEWED**




Absorption of methylethylketone is rapid via inhalation and ingestion, and the compound is presumably amoderate skin penetrant as well. Since methylethylketone is both water and lipid soluble, it is ratherevenly distributed in tissues.[Zenz, C., O.B. Dickerson, E.P. Horvath. Occupational Medicine. 3rded. St. Louis, MO., 1994 149]**PEER REVIEWED**





... The biological half lives for elimination of acetone and MEK calculated on the basis of a first orderkinetic assumption were 3.9 hours and 49 minutes, respectively. ... Workers exposed to acetone or MEKfor 6 to 8 hours could expect to have a residual body burden of acetone the next morning, whereas MEKwould be essentially eliminated.[Brown WD et al; The Changing Nature of Work and Workforce,Proceedings of the Third Joint US-Finish Science Symposium p.111-14(1986)]**PEER REVIEWED**



... reported a steady incr in blood concn during 4-hr exposures of human volunteer subjects to 590 mg/cum (200 ppm) and observed a rapid elimination of MEK, with half-lives of 30 min during the firstpost-exposure hr and 81 min thereafter. An inhalation study with two volunteer subjects exposed to MEKfor 4 hr at concn of 74,590 and 1,180 mg/cu m (25,200 and 400 ppm, respectively) indicated that thekinetics of MEK were dose dependent at higher exposure concn, i.e., much higher levels of MEK inblood were reached relative to inhaled concn, and the post-exposure elimination of MEK in blood wasslower (zero-order kinetics). Simulated exposure to MEK for 8 hr suggests that saturation kinetics arereached at about 295 mg/cu m (100 ppm) at rest and 148 mg/cu m (50 ppm) during light exercise ... .[WHO; Environ Health Criteria 143: Methyl Ethyl Ketone p.56

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There is very limited info on the mechanisms of toxic action of MEK. Relatively high inhaled concn1,475-29,500 mg/cu m (500-10,000 ppm) caused pulmonary vasoconstriction and hypertension in catsand dogs ... From the toxicological point of view, interactions leading to the potentiation of effects,particularly neurotoxicity, by other intrinsically toxic substances constitute the main hazard of MEK. Themechanisms underlying these interactions are incompletely known ... .[WHO; Environ Health Criteria 143: Methyl Ethyl Ketone p.57(1993)]**PEER REVIEWED**

http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:1:actn [21/04/2001 9:14:40 AM]


Interactions:







http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:1:intc (1 of 2) [21/04/2001 9:14:42 AM]







Pharmacology:

Interactions:






... The toxic neuropathy induced by methyl ethyl ketone is clinically and morphologically identical withthat induced by n-hexane and methyl butyl ketone. Methyl ethyl ketone can act synergistically with

http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:1:phcy (1 of 2) [21/04/2001 9:14:44 AM]

n-hexane to produce toxic neuropathy.[Alterkirch H et al; J Neurology 214: 137-52 (1977)]**PEER REVIEWED**













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Body Burden:



Worker exposures were investigated in April 1983 at the Hoover Company, North Canton, Ohio. ... Areaand personal air samples for numerous contaminants were collected and nonionizing radiation levelswere measured. ... General medical questionnaires and blood tests for methyl ethyl ketone (MEK) weregiven to exposed workers. ... No respiratory symptoms or pulmonary function disorders were identifiedin the foundry workers, and MEK was detected in the blood of only one worker at 1.4 ug/ml. ...


[NIOSH; Health Hazard Evaluation Report No. HETA-82-280-1407(1984)]**PEER REVIEWED**


Methyl ethyl ketone occurs naturally as a metabolic byproduct of plants and animals and is released intothe atmosphere by volcanoes and forest fires(1).[(1) Graedel TE et al; Atmospheric Chemical Compounds. NY,NY: AcademicPress p. 263 (1986)]**PEER REVIEWED**




Environmental Fate:


AQUATIC FATE: Based on experimental Koc values of 29 and 34 obtained in silt loams(1), and a


recommended classification scheme(2), methyl ethyl ketone is not expected to adsorb to suspendedsolids and sediment in water(SRC). Methyl ethyl ketone is expected to volatilize from watersurfaces(3,SRC) based on the measured Henry's Law constant of 4.7X10-5 atm-cu m/mole(4). Estimatedhalf-lives for a model river and model lake are 19 and 197, hours respectively(3,SRC). Biodegradation ofthis compound is expected based upon numerous screening tests(5-8). According to a classificationscheme(9), an estimated BCF value of 1(3,SRC), from an experimental log Kow of 0.29(10,SRC),suggests that bioconcentration in aquatic organisms is low(SRC).[(1) Walton BT et al; J Environ Qual 21: 552-58 (1992) (2) Swann RL etal; Res Rev 85: 23 (1983) (3) Lyman WJ et al; Handbook of ChemicalProperty Estimation Methods. Washington DC: Amer Chem Soc pp. 4-9(1990) (4) Bhattacharaya SK et al; Water Res 30: 3099-3105 (1996) (5)Bridie Al, et al; Water Res 13: 627-30 (1979) (6) Price KS et al; JWater Pollut Control Fed 46: 63-77 (1974) (7) Bhattacharaya SK et al;Wat Res 30: 3099-3105 (1996) (8) Suflita JM, Mormile MR; Environ SciTechnol 27: 976-78 (1993) (9) Franke C et al; Chemosphere 29: 1501-14(1994) (10) Hansch C et al; Exploring QSAR Hydrophobic, Electronic andStearic Constants Washington,DC: Amer Chem Soc (1995)]**PEERREVIEWED**




Biological oxygen demand (BOD) after 5 days @ 20 deg C: 1.515-1.92; 2.24 (std dilution technique,normal sewage seed); 5.3 (Dutch std test method); 1.81 (@ 10 mg/l, unadapted sewage, 1 days lagperiod).[Verschueren, K. Handbook of Environmental Data of Organic Chemicals.2nd ed. New York, NY: Van Nostrand Reinhold Co., 1983. 851]**PEER


REVIEWED**














GROUNDWATER: Methyl ethyl ketone was detected in groundwater at a coal strip-mine in Ohio at aconcn of 650 mg/l(1). Methyl ethyl ketone was identified, not quantified, in on-site and off-sitegroundwater near a landfill in New Jersey(2). Methyl ethyl ketone was detected in the groundwater of acoal strip-mine in Lackawanne, PA at a maximum concn of 29,000 ppb(3). Methyl ethyl ketone wasdetected at an average concn of 12 ug/l in the groundwater of 19 solid waste disposal facilities inWisconsin(4) and in the range of 0-91 ug/l in the groundwater of a landfill located in New Castle, DE(5).Methyl ethyl ketone was detected at an average concn of 60 ug/l in the groundwater of a chemicalmanufacturing facility in Alabama(6).[(1) USEPA; Superfund Record of Decision : Summit National Site,Deerfield OH. USEPA/ROD/R85-88/068 (1988) (2) USEPA; Superfund Record


of Decision: Lipari Landfill Mantau Township, NJ. USEPA/ROD/RO2-88/074(1988) (3) ATSDR; Health assessment for Beacon Heights LandfillNational Priorities List (NPL) Site, Beacon Falls, Connecticut, Region1. CERCLIS NO. CTD001145671. Agency for Toxic Substances and DiseaseRegistry PB90-135971 (1990) (4) Battista JR, Connelly JP; VOCcontamination at selected Wisconsin landfills - sampling results andpolicy implications. Wisc Dept of Natural Resources, Madison, WI.Publ-SW-094 (1989) (5) ATSDR; Health assessment for Tybouts Cornerland (Tybouts) National Priorities List (NPL) site, Wilmington, NewCastle County, Deleware, Region 3. CERCLIS NO. DED000606079. Agencyfor Toxic Substances and Disease Registry PB90-144387 (1989) (6)USEPA; Superfund Record of Decision: Ciba-Geigy (Mcintosh Plant), AL.USEPA/ROD/R04-89/056 (1989)]**PEER REVIEWED**





Methyl ethyl ketone was detected in the effluent of a municipal landfill in Quebec, Ontario at concns of


5,200 ppb and 3092 ppb(1). Methyl ethyl ketone was identified, not quantified in the emissions of awaste incinerator in West Germany(2), automobiles(3) and common household waste(4-7). Methyl ethylketone was detected in the effluent from a solid waste composting plant at concns of 130 ug/cu m(background air), 25,500 ug/cu m(tipping area), 1,400 ug/cu m (shredder), 9,400 ug/cu m(indoor air),36,000 ug/cu m (digester), 4,300 ug/cu m(fresh compost), 8,700 ug/cu m(middle age compost), 14,500ug/cu m(old compost) and 1,400 ug/cu m(curing region)(8). Methyl ethyl ketone was identified, notquantified, in the emissions of 200 out of 1,026 common household products(9). Methyl ethyl ketonewas detected in the emissions of a photocopying machine at rates of less than 100 ug/hr to 380 ug/hr(10).Methyl ethyl ketone was detected at a concn of 974 ug/cu m in the emissions of active compost at acomposting facility in Virginia(11).[(1) Brosseau, Heitz M; Atmos Environ 25A: 1473-77 (1994) (2) Jay K,Stieglitz L; Chemosphere 30: 1249-60 (1995) (3) Harley RA et al;Environ Sci Technol 26: 2395-2408 (1992) (4) Wilkins CK, Larsen K; JHigh Resol Chromatogr 18: 373-77 (1995) (5) Wilkins K, Larsen K;Chemosphere 31: 3225-36 (1995) (6) Wilkins K, Larsen K; Chemosphere32: 2049-55 (1996) (7) Wilkins K; Chemosphere 29: 47-53 (1994) (8)Eitzer BD; Environ Sci Technol 29: 896-902 (1995) (9) Sack TM et al;Atmos Environ 26A: 1063-70 (1992)(10) Leovic KW et al; J Air WasteManage Assoc 46: 821-29 (1996) (11) Vandurme GP et al; Water EnvironRes 64: 19-27 (1992)]**PEER REVIEWED**




The presence of solvents such as toluene, xylene, methyl ethyl ketone, and other similar products in theindoor air of an automobile body repair shop, an offset printing facility and the adjacent dwellings wasmonitored, and the individual exposure of the corresponding workers and residents was tested bybiological monitoring of exhaled breath and by personal air sampling. The concentrations of solventstested in the air of both sites surveyed were lower than prevailing Dutch Maximum AllowableConcentration levels. The levels of solvents recorded in the air of apartments situated on top of thefacilities surveyed were significantly higher than the levels recorded in the surrounding dwellings. Thelevels of methyl ethyl ketone, toluene and xylene in personal air samples of employees at the body shop


were 1.5 times higher than in ambient air. The level of toluene in alveolar air of residents living abovethe automobile repair shop was 50 percent higher than that recorded in spot samples. The levels of othersolvents were equal to or lower than the detection level. At the offset printing facility, toluene, xylene,butylacetate, 2-ethoxyethanol and cyclohexanone in air and in personal air samples followed the samegeneral pattern identified for the body shop. In a dwelling next to the shop and in an apartment on top ofthe shop, the concentrations ranged from 3 to 9 percent and 14 to 19 percent, respectively, of the levelsrecorded inside the facility itself.[Verhoeff AP et al; Int Arch Occup Environ Health 59 (2): 153-63(1987)]**PEER REVIEWED**




INDOOR AIR: Methyl ethyl ketone was detected at an average concn of 17.8 ug/cu m at dwellings inCanada(1) and 2.4 ppb in buildings in Boston, MA(2). Methyl ethyl ketone was detected in 2 federaloffice buildings in Portland, OR at concns between 2.0 and 40.9 ug/cu m(3). Four indoor air samples inthe US had average concns of MEK of 9.238 ppb(4).[(1) Chan CC et al; J Air Waste Manage Assoc 40: 62-67 (1990) (2)


Reiss R et al; J Air Waste Manage Assoc 45: 811-22 (1995) (3) HodgesonAT et al; J Air Waste Manage Assoc 41: 1461-68 (1991) (4) Shah JJ,Heyerdahl EK; Environ Sci Technol 22: 1381-88 (1988)]**PEER REVIEWED**

Food Survey Values:

NON-ALCOHOLIC BEVERAGES 70 PPM; ICE CREAM, ICES, ETC 270 PPM; CANDY 100 PPM;BAKED GOODS 100 PPM[Fenaroli's Handbook of Flavor Ingredients. Volume 2. Edited,translated, and revised by T.E. Furia and N. Bellanca. 2nd ed.Cleveland: The Chemical Rubber Co., 1975. 59]**PEER REVIEWED**







Methyl ethyl ketone was identified, not quantified in human milk samples in Bayonne, NJ(1) Pittsburgh,PA(1) Baton Rouge, LA(1) and Australia(2). Methyl ethyl ketone was identified, not quantified in 5 of8 samples of human milk from 4 US urban areas(3).[(1) Erickson MD et al; Acquisition and chemical analysis of mother'smilk for selected toxic substances. USEPA-560/13-80-029. Washington,DC: USEPA Off Pestic Toxic Substances (1980) (2) Urbach G; J


Chromatogr 404: 163-74 (1987) (3) Pellizzari ED et al; Bull EnvironContam Toxicol 28: 322-8 (1982)]**PEER REVIEWED**






http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:1:arts [21/04/2001 9:14:55 AM]


Environmental Fate:


AQUATIC FATE: Based on experimental Koc values of 29 and 34 obtained in silt loams(1), and arecommended classification scheme(2), methyl ethyl ketone is not expected to adsorb to suspendedsolids and sediment in water(SRC). Methyl ethyl ketone is expected to volatilize from watersurfaces(3,SRC) based on the measured Henry's Law constant of 4.7X10-5 atm-cu m/mole(4). Estimatedhalf-lives for a model river and model lake are 19 and 197, hours respectively(3,SRC). Biodegradation ofthis compound is expected based upon numerous screening tests(5-8). According to a classificationscheme(9), an estimated BCF value of 1(3,SRC), from an experimental log Kow of 0.29(10,SRC),suggests that bioconcentration in aquatic organisms is low(SRC).[(1) Walton BT et al; J Environ Qual 21: 552-58 (1992) (2) Swann RL etal; Res Rev 85: 23 (1983) (3) Lyman WJ et al; Handbook of ChemicalProperty Estimation Methods. Washington DC: Amer Chem Soc pp. 4-9(1990) (4) Bhattacharaya SK et al; Water Res 30: 3099-3105 (1996) (5)Bridie Al, et al; Water Res 13: 627-30 (1979) (6) Price KS et al; JWater Pollut Control Fed 46: 63-77 (1974) (7) Bhattacharaya SK et al;Wat Res 30: 3099-3105 (1996) (8) Suflita JM, Mormile MR; Environ SciTechnol 27: 976-78 (1993) (9) Franke C et al; Chemosphere 29: 1501-14(1994) (10) Hansch C et al; Exploring QSAR Hydrophobic, Electronic andStearic Constants Washington,DC: Amer Chem Soc (1995)]**PEERREVIEWED**

ATMOSPHERIC FATE: According to a model of gas/particle partitioning of semivolatile organiccompounds in the atmosphere(1), methyl ethyl ketone, which has an experimental vapor pressure of 91mm Hg at 25 deg C(2), will exist solely as a vapor in the ambient atmosphere. Vapor-phase methyl ethylketone is degraded in the atmosphere by reaction with photochemically-produced hydroxyl

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radicals(SRC); the half-life for this reaction in air is estimated to be about 14(3,SRC) days. Methyl ethylketone is also expected to undergo photodecomposition in the atmosphere by natural sunlight(4,5).Photochemical degradation of methyl ethyl ketone by natural sunlight is expected to occur atapproximately 1/5 the rate of degradation by photochemically produced hydroxyl radicals(5).[(1) Bidleman TF; Environ Sci Technol 22: 361-367 (1988) (2) Alarie Yet al; Toxicol Appl Pharmacol 134: 92-99 (1995) (3) Atkinson R; J PhysChem Ref Data (1989) (4) Raber W et al; pp. 364-70 in Phys Chem BehavAtmos Pollut 5th ed Restelli G, Angeletti G eds, Kluwer: Dordecht,Netherlands (1990) (5) Altshuller AP; J Atmos Chem 13: 155-82(1991)]**PEER REVIEWED**





Biological oxygen demand (BOD) after 5 days @ 20 deg C: 1.515-1.92; 2.24 (std dilution technique,normal sewage seed); 5.3 (Dutch std test method); 1.81 (@ 10 mg/l, unadapted sewage, 1 days lagperiod).[Verschueren, K. Handbook of Environmental Data of Organic Chemicals.2nd ed. New York, NY: Van Nostrand Reinhold Co., 1983. 851]**PEERREVIEWED**



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GROUNDWATER: Methyl ethyl ketone was detected in groundwater at a coal strip-mine in Ohio at aconcn of 650 mg/l(1). Methyl ethyl ketone was identified, not quantified, in on-site and off-sitegroundwater near a landfill in New Jersey(2). Methyl ethyl ketone was detected in the groundwater of acoal strip-mine in Lackawanne, PA at a maximum concn of 29,000 ppb(3). Methyl ethyl ketone wasdetected at an average concn of 12 ug/l in the groundwater of 19 solid waste disposal facilities inWisconsin(4) and in the range of 0-91 ug/l in the groundwater of a landfill located in New Castle, DE(5).Methyl ethyl ketone was detected at an average concn of 60 ug/l in the groundwater of a chemicalmanufacturing facility in Alabama(6).[(1) USEPA; Superfund Record of Decision : Summit National Site,Deerfield OH. USEPA/ROD/R85-88/068 (1988) (2) USEPA; Superfund Recordof Decision: Lipari Landfill Mantau Township, NJ. USEPA/ROD/RO2-88/074(1988) (3) ATSDR; Health assessment for Beacon Heights LandfillNational Priorities List (NPL) Site, Beacon Falls, Connecticut, Region1. CERCLIS NO. CTD001145671. Agency for Toxic Substances and DiseaseRegistry PB90-135971 (1990) (4) Battista JR, Connelly JP; VOCcontamination at selected Wisconsin landfills - sampling results andpolicy implications. Wisc Dept of Natural Resources, Madison, WI.Publ-SW-094 (1989) (5) ATSDR; Health assessment for Tybouts Cornerland (Tybouts) National Priorities List (NPL) site, Wilmington, NewCastle County, Deleware, Region 3. CERCLIS NO. DED000606079. Agencyfor Toxic Substances and Disease Registry PB90-144387 (1989) (6)USEPA; Superfund Record of Decision: Ciba-Geigy (Mcintosh Plant), AL.USEPA/ROD/R04-89/056 (1989)]**PEER REVIEWED**

SURFACE WATER: Methyl ethyl ketone was identified, not quantified, in the Black River inTuscaloosa, AL(1) and Newark Bay, NJ(2). Methyl ethyl ketone was detected in the Potomac River at aconcn of less than 40 ug/l(3). Methyl ethyl ketone was detected in a creek in New Castle, DE near alandfill at concns of 0-11,000 ug/l(4).[(1) Berstch W et al; J Chromatog 112: 701-18 (1975) (2) Gunster DG etal; Environ Pollut 82: 245-53 (1993) (3) Hall LWJR et al; Aquat

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Toxicol 10: 73-99 (1987) (4) ATSDR; Health assessment for TyboutsCorner land (Tybouts) National Priorities List (NPL) site, Wilmington,New Castle County, Deleware, Region 3. Agency for Toxic Substances andDisease Registry PB90-144387 (1989)]**PEER REVIEWED**


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Methyl ethyl ketone was detected in the effluent of a municipal landfill in Quebec, Ontario at concns of5,200 ppb and 3092 ppb(1). Methyl ethyl ketone was identified, not quantified in the emissions of awaste incinerator in West Germany(2), automobiles(3) and common household waste(4-7). Methyl ethylketone was detected in the effluent from a solid waste composting plant at concns of 130 ug/cu m(background air), 25,500 ug/cu m(tipping area), 1,400 ug/cu m (shredder), 9,400 ug/cu m(indoor air),36,000 ug/cu m (digester), 4,300 ug/cu m(fresh compost), 8,700 ug/cu m(middle age compost), 14,500ug/cu m(old compost) and 1,400 ug/cu m(curing region)(8). Methyl ethyl ketone was identified, notquantified, in the emissions of 200 out of 1,026 common household products(9). Methyl ethyl ketonewas detected in the emissions of a photocopying machine at rates of less than 100 ug/hr to 380 ug/hr(10).Methyl ethyl ketone was detected at a concn of 974 ug/cu m in the emissions of active compost at acomposting facility in Virginia(11).[(1) Brosseau, Heitz M; Atmos Environ 25A: 1473-77 (1994) (2) Jay K,Stieglitz L; Chemosphere 30: 1249-60 (1995) (3) Harley RA et al;Environ Sci Technol 26: 2395-2408 (1992) (4) Wilkins CK, Larsen K; JHigh Resol Chromatogr 18: 373-77 (1995) (5) Wilkins K, Larsen K;Chemosphere 31: 3225-36 (1995) (6) Wilkins K, Larsen K; Chemosphere32: 2049-55 (1996) (7) Wilkins K; Chemosphere 29: 47-53 (1994) (8)Eitzer BD; Environ Sci Technol 29: 896-902 (1995) (9) Sack TM et al;Atmos Environ 26A: 1063-70 (1992)(10) Leovic KW et al; J Air WasteManage Assoc 46: 821-29 (1996) (11) Vandurme GP et al; Water EnvironRes 64: 19-27 (1992)]**PEER REVIEWED**

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The presence of solvents such as toluene, xylene, methyl ethyl ketone, and other similar products in theindoor air of an automobile body repair shop, an offset printing facility and the adjacent dwellings wasmonitored, and the individual exposure of the corresponding workers and residents was tested bybiological monitoring of exhaled breath and by personal air sampling. The concentrations of solventstested in the air of both sites surveyed were lower than prevailing Dutch Maximum AllowableConcentration levels. The levels of solvents recorded in the air of apartments situated on top of thefacilities surveyed were significantly higher than the levels recorded in the surrounding dwellings. Thelevels of methyl ethyl ketone, toluene and xylene in personal air samples of employees at the body shopwere 1.5 times higher than in ambient air. The level of toluene in alveolar air of residents living abovethe automobile repair shop was 50 percent higher than that recorded in spot samples. The levels of othersolvents were equal to or lower than the detection level. At the offset printing facility, toluene, xylene,butylacetate, 2-ethoxyethanol and cyclohexanone in air and in personal air samples followed the samegeneral pattern identified for the body shop. In a dwelling next to the shop and in an apartment on top ofthe shop, the concentrations ranged from 3 to 9 percent and 14 to 19 percent, respectively, of the levelsrecorded inside the facility itself.[Verhoeff AP et al; Int Arch Occup Environ Health 59 (2): 153-63(1987)]**PEER REVIEWED**



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Food Survey Values:

NON-ALCOHOLIC BEVERAGES 70 PPM; ICE CREAM, ICES, ETC 270 PPM; CANDY 100 PPM;BAKED GOODS 100 PPM[Fenaroli's Handbook of Flavor Ingredients. Volume 2. Edited,translated, and revised by T.E. Furia and N. Bellanca. 2nd ed.Cleveland: The Chemical Rubber Co., 1975. 59]**PEER REVIEWED**


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FIFRA Requirements:

Unless designated as an active ingredient in accordance with paragraph (b) or (c) of this section, thissubstance, when used in antimicrobial products, is considered inert, having no independent pesticidalactivity. The percentage of such an ingredient shall be included on the label in the total percentage ofinert ingredients.[40 CFR 162.60 (7/1/88)]**PEER REVIEWED**




TSCA Requirements:




RCRA Requirements:

U159; As stipulated in 40 CFR 261.33, when 2-butanone, as a commercial chemical product ormanufacturing chemical intermediate or an off-specification commercial chemical product or amanufacturing chemical intermediate, becomes a waste, it must be managed according to Federal and/or

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State hazardous waste regulations. Also defined as a hazardous waste is any residue, contaminated soil,water, or other debris resulting from the cleanup of a spill, into water or on dry land, of this waste.Generators of small quantities of this waste may qualify for partial exclusion from hazardous wasteregulations (40 CFR 261.5).[40 CFR 261.33 (7/1/96)]**PEER REVIEWED**









(ME) MAINE 170 ug/l[USEPA/Office of Water; Federal-State Toxicology and Risk Analysis


Committee (FSTRAC). Summary of State and Federal Drinking WaterStandards and Guidelines (11/93)] **QC REVIEWED**


(NC) NORTH CAROLINA 170 ug/l[USEPA/Office of Water; Federal-State Toxicology and Risk AnalysisCommittee (FSTRAC). Summary of State and Federal Drinking WaterStandards and Guidelines (11/93)] **QC REVIEWED**



(WI) WISCONSIN 460 ug/l[USEPA/Office of Water; Federal-State Toxicology and Risk AnalysisCommittee (FSTRAC). Summary of State and Federal Drinking WaterStandards and Guidelines (11/93)] **QC REVIEWED**

FDA Requirements:








FIFRA Requirements:

Unless designated as an active ingredient in accordance with paragraph (b) or (c) of this section, thissubstance, when used in antimicrobial products, is considered inert, having no independent pesticidalactivity. The percentage of such an ingredient shall be included on the label in the total percentage ofinert ingredients.[40 CFR 162.60 (7/1/88)]**PEER REVIEWED**


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http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:1:cerc [21/04/2001 9:15:20 AM]


RCRA Requirements:

U159; As stipulated in 40 CFR 261.33, when 2-butanone, as a commercial chemical product ormanufacturing chemical intermediate or an off-specification commercial chemical product or amanufacturing chemical intermediate, becomes a waste, it must be managed according to Federal and/orState hazardous waste regulations. Also defined as a hazardous waste is any residue, contaminated soil,water, or other debris resulting from the cleanup of a spill, into water or on dry land, of this waste.Generators of small quantities of this waste may qualify for partial exclusion from hazardous wasteregulations (40 CFR 261.5).[40 CFR 261.33 (7/1/96)]**PEER REVIEWED**


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http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:1:astd [21/04/2001 9:15:23 AM]






(ME) MAINE 170 ug/l[USEPA/Office of Water; Federal-State Toxicology and Risk AnalysisCommittee (FSTRAC). Summary of State and Federal Drinking WaterStandards and Guidelines (11/93)] **QC REVIEWED**


(NC) NORTH CAROLINA 170 ug/l[USEPA/Office of Water; Federal-State Toxicology and Risk AnalysisCommittee (FSTRAC). Summary of State and Federal Drinking WaterStandards and Guidelines (11/93)] **QC REVIEWED**



(WI) WISCONSIN 460 ug/l[USEPA/Office of Water; Federal-State Toxicology and Risk AnalysisCommittee (FSTRAC). Summary of State and Federal Drinking Water

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Standards and Guidelines (11/93)] **QC REVIEWED**

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FDA Requirements:




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Molecular Formula:


Molecular Weight:

72.11[Budavari, S. (ed.). The Merck Index - An Encyclopedia of Chemicals,Drugs, and Biologicals. Whitehouse Station, NJ: Merck and Co., Inc.,1996. 1037]**PEER REVIEWED**

Color/Form:


Odor:




Taste:


Taste threshold: 5.00x10+1 ppm in milk (purity not specified)[Fazzalari, F.A. (ed.). Compilation of Odor and Taste Threshold Values

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Data. ASTM Data Series DS 48A (Committee E-18). Philadelphia, PA:American Society for Testing and Materials, 1978. 24]**PEER REVIEWED**

Boiling Point:


Melting Point:

-86 DEG C[Budavari, S. (ed.). The Merck Index - An Encyclopedia of Chemicals,Drugs, and Biologicals. Whitehouse Station, NJ: Merck and Co., Inc.,1996. 1037]**PEER REVIEWED**





Heat of Combustion:





Log Kow = 0.29[Hansch, C., Leo, A., D. Hoekman. Exploring QSAR - Hydrophobic,Electronic, and Steric Constants. Washington, DC: American Chemical


Society., 1995. 9]**PEER REVIEWED**

Solubilities:












Surface Tension:


Vapor Density:


Vapor Pressure:




Viscosity:





HEAT OF SOLN (EST): -9 BTU/LB= -5 CAL/G= -0.2X10+5 JOULES/KG; RATIO OF SPECIFICHEATS OF VAPOR (GAS): 1.075; REID VAPOR PRESSURE: 3.5 PSIA[U.S. Coast Guard, Department of Transportation. CHRIS - Hazardous


Chemical Data. Volume II. Washington, D.C.: U.S. Government PrintingOffice, 1984-5.]**PEER REVIEWED**



Coefficient of expansion= 0.00076/deg F; electrical conductivity= 1.0X10-7 ohms @ 25 deg C[Flick, E.W. Industrial Solvents Handbook. 3rd ed. Park Ridge, NJ:Noyes Publications, 1985. 473]**PEER REVIEWED**



Henry's Law constant = 4.7X10-5 atm-cu m/mol at 25 deg C[Bhattacharaya SK et al; Water Res 30: 3099-3105 (1996)]**PEERREVIEWED**



Molecular Formula:


http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:1:mf [21/04/2001 9:15:31 AM]


Molecular Weight:

72.11[Budavari, S. (ed.). The Merck Index - An Encyclopedia of Chemicals,Drugs, and Biologicals. Whitehouse Station, NJ: Merck and Co., Inc.,1996. 1037]**PEER REVIEWED**

http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:1:mw [21/04/2001 9:15:33 AM]


Color/Form:


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Odor:




http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:1:odor [21/04/2001 9:15:35 AM]


Taste:


Taste threshold: 5.00x10+1 ppm in milk (purity not specified)[Fazzalari, F.A. (ed.). Compilation of Odor and Taste Threshold ValuesData. ASTM Data Series DS 48A (Committee E-18). Philadelphia, PA:American Society for Testing and Materials, 1978. 24]**PEER REVIEWED**

http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:1:tast [21/04/2001 9:15:37 AM]


Boiling Point:


http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:1:bp [21/04/2001 9:15:38 AM]


Melting Point:

-86 DEG C[Budavari, S. (ed.). The Merck Index - An Encyclopedia of Chemicals,Drugs, and Biologicals. Whitehouse Station, NJ: Merck and Co., Inc.,1996. 1037]**PEER REVIEWED**

http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:1:mp [21/04/2001 9:15:39 AM]




http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:1:ctp [21/04/2001 9:15:40 AM]




http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:1:den [21/04/2001 9:15:41 AM]


Heat of Combustion:


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http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:1:htv [21/04/2001 9:15:44 AM]



Log Kow = 0.29[Hansch, C., Leo, A., D. Hoekman. Exploring QSAR - Hydrophobic,Electronic, and Steric Constants. Washington, DC: American ChemicalSociety., 1995. 9]**PEER REVIEWED**

http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:1:owpc [21/04/2001 9:15:45 AM]


Solubilities:




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http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:1:spec [21/04/2001 9:15:48 AM]


Surface Tension:


http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:1:surf [21/04/2001 9:15:49 AM]


Vapor Density:


http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:1:vapd [21/04/2001 9:15:50 AM]


Vapor Pressure:


http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:1:vap [21/04/2001 9:15:52 AM]




http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:1:evap [21/04/2001 9:15:53 AM]


Viscosity:


http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:1:visc [21/04/2001 9:15:55 AM]





HEAT OF SOLN (EST): -9 BTU/LB= -5 CAL/G= -0.2X10+5 JOULES/KG; RATIO OF SPECIFICHEATS OF VAPOR (GAS): 1.075; REID VAPOR PRESSURE: 3.5 PSIA[U.S. Coast Guard, Department of Transportation. CHRIS - HazardousChemical Data. Volume II. Washington, D.C.: U.S. Government PrintingOffice, 1984-5.]**PEER REVIEWED**



Coefficient of expansion= 0.00076/deg F; electrical conductivity= 1.0X10-7 ohms @ 25 deg C[Flick, E.W. Industrial Solvents Handbook. 3rd ed. Park Ridge, NJ:Noyes Publications, 1985. 473]**PEER REVIEWED**



Henry's Law constant = 4.7X10-5 atm-cu m/mol at 25 deg C[Bhattacharaya SK et al; Water Res 30: 3099-3105 (1996)]**PEER

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REVIEWED**

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Public safety: CALL Emergency Response Telephone Number. ... Isolate spill or leak area immediatelyfor at least 25 to 50 meters (80 to 160 feet) in all directions. Keep unauthorized personnel away. Stayupwind. Keep out of low areas. Ventilate closed spaces before entering.[U.S. Department of Transportation. 1996 North American EmergencyResponse Guidebook. A Guidebook for First Responders During theInitial Phase of aHazardous Materials/Dangerous Goods Incident. U.S.Department of Transportation (U.S. DOT) Research and Special ProgramsAdministration, Office of HazardousMaterials Initiatives and Training(DHM-50), Washington, D.C. (1996).,p. G-127]**PEER REVIEWED**

Protective clothing: Wear positive pressure self-contained breathing apparatus (SCBA). Structuralfirefighters' protective clothing will only provide limited protection.[U.S. Department of Transportation. 1996 North American EmergencyResponse Guidebook. A Guidebook for First Responders During theInitial Phase of aHazardous Materials/Dangerous Goods Incident. U.S.Department of Transportation (U.S. DOT) Research and Special Programs

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Administration, Office of HazardousMaterials Initiatives and Training(DHM-50), Washington, D.C. (1996).,p. G-127]**PEER REVIEWED**



Spill or leak: ELIMINATE all ignition sources (no smoking, flares, sparks or flames in immediate area).All equipment used when handling the product must be grounded. Do not touch or walk through spilledmaterial. Stop leak if you can do it without risk. Prevent entry into waterways, sewers, basements orconfined areas. A vapor suppressing foam may be used to reduce vapors. Absorb or cover with dry earth,sand or other non-combustible material and transfer to containers. Use clean non-sparking tools to collectabsorbed material. Large spills: Dike far ahead of liquid spill for later disposal. Water spray may reducevapor; but may not prevent ignition in closed spaces.[U.S. Department of Transportation. 1996 North American EmergencyResponse Guidebook. A Guidebook for First Responders During theInitial Phase of aHazardous Materials/Dangerous Goods Incident. U.S.Department of Transportation (U.S. DOT) Research and Special ProgramsAdministration, Office of HazardousMaterials Initiatives and Training(DHM-50), Washington, D.C. (1996).,p. G-127]**PEER REVIEWED**

First aid: Move victim to fresh air. Call emergency medical care. Apply artificial respiration if victim isnot breathing. Administer oxygen if breathing is difficult. Remove and isolate contaminated clothing andshoes. In case of contact with substance, immediately flush skin or eyes with running water for at least 20minutes. Wash skin with soap and water. Keep victim warm and quiet. Ensure that medical personnel areaware of the material(s) involved, and take precautions to protect themselves.


[U.S. Department of Transportation. 1996 North American EmergencyResponse Guidebook. A Guidebook for First Responders During theInitial Phase of aHazardous Materials/Dangerous Goods Incident. U.S.Department of Transportation (U.S. DOT) Research and Special ProgramsAdministration, Office of HazardousMaterials Initiatives and Training(DHM-50), Washington, D.C. (1996).,p. G-127]**PEER REVIEWED**

Odor Threshold:









Fire Potential:







Flammable Limits:


Flash Point:


22 deg F (Tag open cup)[Lewis, R.J. Sax's Dangerous Properties of Industrial Materials. 9thed. Volumes 1-3. New York, NY: Van Nostrand Reinhold, 1996.2239]**PEER REVIEWED**
















Strong oxidizers, amines, ammonia, inorganic acids, caustics, copper, isocyanates, pyridines.


[NIOSH. NIOSH Pocket Guide to Chemical Hazards. DHHS (NIOSH)Publication No. 97-140. Washington, D.C. U.S. Government PrintingOffice, 1997. 36]**QC REVIEWED**








ORG CANISTER OR AIR PACK; PLASTIC GLOVES[U.S. Coast Guard, Department of Transportation. CHRIS - HazardousChemical Data. Volume II. Washington, D.C.: U.S. Government PrintingOffice, 1984-5.]**PEER REVIEWED**








Recommendations for respirator selection. Max concn for use: 3000 ppm. Respirator Class(es): Anysupplied-air respirator operated in a continuous flow mode. eye protection needed. Any powered,air-purifying respirator with organic vapor cartridge(s). Eye protection needed. Any chemical cartridgerespirator with a full facepiece and organic vapor cartridge(s). Any air-purifying, full-facepiece respirator(gas mask) with a chin-style, front- or back-mounted organic vapor canister. Any self-containedbreathing apparatus with a full facepiece. Any supplied-air respirator with a full facepiece.[NIOSH. NIOSH Pocket Guide to Chemical Hazards. DHHS (NIOSH)Publication No. 97-140. Washington, D.C. U.S. Government PrintingOffice, 1997. 36]**QC REVIEWED**

Recommendations for respirator selection. Condition: Emergency or planned entry into unknown concnor IDLH conditions: Respirator Class(es): Any self-contained breathing apparatus that has a fullfacepiece and is operated in a pressure-demand or other positive pressure mode. Any supplied-airrespirator that has a full face piece and is operated in pressure-demand or other positive pressure mode incombination with an auxiliary self-contained breathing apparatus operated in pressure-demand or otherpositive pressure mode.[NIOSH. NIOSH Pocket Guide to Chemical Hazards. DHHS (NIOSH)Publication No. 97-140. Washington, D.C. U.S. Government PrintingOffice, 1997. 36]**QC REVIEWED**

Recommendations for respirator selection. Condition: Escape from suddenly occurring respiratoryhazards: Respirator Class(es): Any air-purifying, full-facepiece respirator (gas mask) with a chin-style,front- or back-mounted organic vapor canister. Any appropriate escape-type, self-contained breathingapparatus.


[NIOSH. NIOSH Pocket Guide to Chemical Hazards. DHHS (NIOSH)Publication No. 97-140. Washington, D.C. U.S. Government PrintingOffice, 1997. 36]**QC REVIEWED**








Contact lenses should not be worn when working with this chemical.[NIOSH. NIOSH Pocket Guide to Chemical Hazards. DHHS (NIOSH)Publication No. 97-140. Washington, D.C. U.S. Government PrintingOffice, 1997. 36]**QC REVIEWED**









No person may /transport,/ offer or accept a hazardous material for transportation in commerce unlessthat person is registered in conformance ... and the hazardous material is properly classed, described,packaged, marked, labeled, and in condition for shipment as required or authorized by ... /the hazardousmaterials regulations (49 CFR 171-177)./[49 CFR 171.2 (7/1/96)]**PEER REVIEWED**


The International Maritime Dangerous Goods Code lays down basic principles for transporting


hazardous chemicals. Detailed recommendations for individual substances and a number ofrecommendations for good practice are included in the classes dealing with such substances. A generalindex of technical names has also been compiled. This index should always be consulted whenattempting to locate the appropriate procedures to be used when shipping any substance or article.[IMDG; International Maritime Dangerous Goods Code; InternationalMaritime Organization p.3080 (1988)]**PEER REVIEWED**

Cleanup Methods:





Disposal Methods:














Public safety: CALL Emergency Response Telephone Number. ... Isolate spill or leak area immediatelyfor at least 25 to 50 meters (80 to 160 feet) in all directions. Keep unauthorized personnel away. Stayupwind. Keep out of low areas. Ventilate closed spaces before entering.[U.S. Department of Transportation. 1996 North American EmergencyResponse Guidebook. A Guidebook for First Responders During theInitial Phase of aHazardous Materials/Dangerous Goods Incident. U.S.Department of Transportation (U.S. DOT) Research and Special ProgramsAdministration, Office of HazardousMaterials Initiatives and Training(DHM-50), Washington, D.C. (1996).,p. G-127]**PEER REVIEWED**

Protective clothing: Wear positive pressure self-contained breathing apparatus (SCBA). Structuralfirefighters' protective clothing will only provide limited protection.[U.S. Department of Transportation. 1996 North American EmergencyResponse Guidebook. A Guidebook for First Responders During theInitial Phase of aHazardous Materials/Dangerous Goods Incident. U.S.Department of Transportation (U.S. DOT) Research and Special ProgramsAdministration, Office of HazardousMaterials Initiatives and Training(DHM-50), Washington, D.C. (1996).,p. G-127]**PEER REVIEWED**

http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:1:dot (1 of 3) [21/04/2001 9:16:05 AM]



Spill or leak: ELIMINATE all ignition sources (no smoking, flares, sparks or flames in immediate area).All equipment used when handling the product must be grounded. Do not touch or walk through spilledmaterial. Stop leak if you can do it without risk. Prevent entry into waterways, sewers, basements orconfined areas. A vapor suppressing foam may be used to reduce vapors. Absorb or cover with dry earth,sand or other non-combustible material and transfer to containers. Use clean non-sparking tools to collectabsorbed material. Large spills: Dike far ahead of liquid spill for later disposal. Water spray may reducevapor; but may not prevent ignition in closed spaces.[U.S. Department of Transportation. 1996 North American EmergencyResponse Guidebook. A Guidebook for First Responders During theInitial Phase of aHazardous Materials/Dangerous Goods Incident. U.S.Department of Transportation (U.S. DOT) Research and Special ProgramsAdministration, Office of HazardousMaterials Initiatives and Training(DHM-50), Washington, D.C. (1996).,p. G-127]**PEER REVIEWED**

First aid: Move victim to fresh air. Call emergency medical care. Apply artificial respiration if victim isnot breathing. Administer oxygen if breathing is difficult. Remove and isolate contaminated clothing andshoes. In case of contact with substance, immediately flush skin or eyes with running water for at least 20minutes. Wash skin with soap and water. Keep victim warm and quiet. Ensure that medical personnel areaware of the material(s) involved, and take precautions to protect themselves.[U.S. Department of Transportation. 1996 North American EmergencyResponse Guidebook. A Guidebook for First Responders During theInitial Phase of aHazardous Materials/Dangerous Goods Incident. U.S.


Department of Transportation (U.S. DOT) Research and Special ProgramsAdministration, Office of HazardousMaterials Initiatives and Training(DHM-50), Washington, D.C. (1996).,p. G-127]**PEER REVIEWED**



Odor Threshold:






http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:1:odrt [21/04/2001 9:16:06 AM]


Fire Potential:


http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:1:fpot [21/04/2001 9:16:08 AM]






http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:1:nfpa [21/04/2001 9:16:09 AM]


Flammable Limits:


http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:1:flmt [21/04/2001 9:16:10 AM]


Flash Point:


22 deg F (Tag open cup)[Lewis, R.J. Sax's Dangerous Properties of Industrial Materials. 9thed. Volumes 1-3. New York, NY: Van Nostrand Reinhold, 1996.2239]**PEER REVIEWED**

http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:1:flpt [21/04/2001 9:16:12 AM]




http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:1:auto [21/04/2001 9:16:14 AM]






http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:1:firp [21/04/2001 9:16:16 AM]




http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:1:ofhz [21/04/2001 9:16:17 AM]




http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:1:expl [21/04/2001 9:16:19 AM]






Strong oxidizers, amines, ammonia, inorganic acids, caustics, copper, isocyanates, pyridines.[NIOSH. NIOSH Pocket Guide to Chemical Hazards. DHHS (NIOSH)Publication No. 97-140. Washington, D.C. U.S. Government PrintingOffice, 1997. 36]**QC REVIEWED**


http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:1:reac [21/04/2001 9:16:20 AM]





http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:1:dcmp [21/04/2001 9:16:22 AM]




http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:1:idlh [21/04/2001 9:16:23 AM]



ORG CANISTER OR AIR PACK; PLASTIC GLOVES[U.S. Coast Guard, Department of Transportation. CHRIS - HazardousChemical Data. Volume II. Washington, D.C.: U.S. Government PrintingOffice, 1984-5.]**PEER REVIEWED**







Recommendations for respirator selection. Max concn for use: 3000 ppm. Respirator Class(es): Anysupplied-air respirator operated in a continuous flow mode. eye protection needed. Any powered,air-purifying respirator with organic vapor cartridge(s). Eye protection needed. Any chemical cartridge

http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:1:equp (1 of 2) [21/04/2001 9:16:25 AM]

respirator with a full facepiece and organic vapor cartridge(s). Any air-purifying, full-facepiece respirator(gas mask) with a chin-style, front- or back-mounted organic vapor canister. Any self-containedbreathing apparatus with a full facepiece. Any supplied-air respirator with a full facepiece.[NIOSH. NIOSH Pocket Guide to Chemical Hazards. DHHS (NIOSH)Publication No. 97-140. Washington, D.C. U.S. Government PrintingOffice, 1997. 36]**QC REVIEWED**

Recommendations for respirator selection. Condition: Emergency or planned entry into unknown concnor IDLH conditions: Respirator Class(es): Any self-contained breathing apparatus that has a fullfacepiece and is operated in a pressure-demand or other positive pressure mode. Any supplied-airrespirator that has a full face piece and is operated in pressure-demand or other positive pressure mode incombination with an auxiliary self-contained breathing apparatus operated in pressure-demand or otherpositive pressure mode.[NIOSH. NIOSH Pocket Guide to Chemical Hazards. DHHS (NIOSH)Publication No. 97-140. Washington, D.C. U.S. Government PrintingOffice, 1997. 36]**QC REVIEWED**

Recommendations for respirator selection. Condition: Escape from suddenly occurring respiratoryhazards: Respirator Class(es): Any air-purifying, full-facepiece respirator (gas mask) with a chin-style,front- or back-mounted organic vapor canister. Any appropriate escape-type, self-contained breathingapparatus.[NIOSH. NIOSH Pocket Guide to Chemical Hazards. DHHS (NIOSH)Publication No. 97-140. Washington, D.C. U.S. Government PrintingOffice, 1997. 36]**QC REVIEWED**










Contact lenses should not be worn when working with this chemical.[NIOSH. NIOSH Pocket Guide to Chemical Hazards. DHHS (NIOSH)Publication No. 97-140. Washington, D.C. U.S. Government Printing

http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:1:oprm (1 of 2) [21/04/2001 9:16:27 AM]

Office, 1997. 36]**QC REVIEWED**





http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:1:oprm (2 of 2) [21/04/2001 9:16:27 AM]




http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:1:ssl [21/04/2001 9:16:29 AM]





The International Maritime Dangerous Goods Code lays down basic principles for transportinghazardous chemicals. Detailed recommendations for individual substances and a number ofrecommendations for good practice are included in the classes dealing with such substances. A generalindex of technical names has also been compiled. This index should always be consulted whenattempting to locate the appropriate procedures to be used when shipping any substance or article.[IMDG; International Maritime Dangerous Goods Code; InternationalMaritime Organization p.3080 (1988)]**PEER REVIEWED**

http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:1:ship [21/04/2001 9:16:30 AM]


Cleanup Methods:





http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:1:clup [21/04/2001 9:16:31 AM]


Disposal Methods:








http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:1:disp [21/04/2001 9:16:34 AM]



OSHA Standards:











http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:1:oest [21/04/2001 9:16:36 AM]


OSHA Standards:



http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:1:osha [21/04/2001 9:16:37 AM]





http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:1:tlv [21/04/2001 9:16:38 AM]





http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:1:nrec [21/04/2001 9:16:40 AM]



Major Uses:












CATALYST IN THE PRODN OF HYDRAZINE (NON-USA USE)

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[SRI]**PEER REVIEWED**

Used as a sterilizer for bacterial spores on surgical instruments, hypodermic needles/syringe, and dentalinstruments.[Purdue University; National Pesticide Information Retrieval System(1988)]**PEER REVIEWED**

... Solvent ... required for the polymerization processing of polystyrene, acrylonitrile-butadiene-styrene,and styrene-butadiene-rubber.[Fishbein L; Industrial Hazards of Plastics and Synthetic Elastomersp.239-62 (1984)]**PEER REVIEWED**

Manufacturers:












SOLVENT FOR VINYL COATINGS, 30%; SOLVENT FOR ADHESIVES, 18%; SOLVENT FORNITROCELLULOSE COATINGS, 13%; SOLVENT FOR ACRYLIC COATINGS, 11%; SOLVENTFOR OTHER COATINGS, 7%; SOLVENT FOR MAGNETIC TAPES, 7%; EXTRACTIONSOLVENT FOR LUBE OIL DEWAXING, 5%; SOLVENT FOR PRINTING INKS, 5%; OTHER, 4%(1981)[SRI]**PEER REVIEWED**





U. S. Production:









U. S. Imports:






U. S. Exports:








Major Uses:












CATALYST IN THE PRODN OF HYDRAZINE (NON-USA USE)[SRI]**PEER REVIEWED**

Used as a sterilizer for bacterial spores on surgical instruments, hypodermic needles/syringe, and dental

http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:1:use (1 of 2) [21/04/2001 9:16:44 AM]

instruments.[Purdue University; National Pesticide Information Retrieval System(1988)]**PEER REVIEWED**

... Solvent ... required for the polymerization processing of polystyrene, acrylonitrile-butadiene-styrene,and styrene-butadiene-rubber.[Fishbein L; Industrial Hazards of Plastics and Synthetic Elastomersp.239-62 (1984)]**PEER REVIEWED**

http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:1:use (2 of 2) [21/04/2001 9:16:44 AM]


Manufacturers:




http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:1:mfs [21/04/2001 9:16:47 AM]





http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:1:mmfg [21/04/2001 9:16:48 AM]





http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:1:form [21/04/2001 9:16:49 AM]



SOLVENT FOR VINYL COATINGS, 30%; SOLVENT FOR ADHESIVES, 18%; SOLVENT FORNITROCELLULOSE COATINGS, 13%; SOLVENT FOR ACRYLIC COATINGS, 11%; SOLVENTFOR OTHER COATINGS, 7%; SOLVENT FOR MAGNETIC TAPES, 7%; EXTRACTIONSOLVENT FOR LUBE OIL DEWAXING, 5%; SOLVENT FOR PRINTING INKS, 5%; OTHER, 4%(1981)[SRI]**PEER REVIEWED**





http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:1:cpat [21/04/2001 9:16:51 AM]


U. S. Production:








http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:1:prod [21/04/2001 9:16:52 AM]


U. S. Imports:






http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:1:impt [21/04/2001 9:16:54 AM]


U. S. Exports:






http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:1:expt [21/04/2001 9:16:55 AM]


Laboratory Methods:



Venous blood sampled after 2 or more hr of exposure. Processed by Gas Chromatography, FID. Range:0.1 to 8 ug/ml. Precision: 0.095 (1 ug/ml blood).[U.S. Department of Health and Human Services, Public Health Service.Centers for Disease Control, National Institute for OccupationalSafety and Health. NIOSHManual of Analytical Methods, 3rd ed. Volumes1 and 2 with 1985 supplement, and revisions. Washington, DC: U.S.Government Printing Office, February 1984.,p. V1 8002-1]**PEERREVIEWED**






ANALYTE: METHYL ETHYL KETONE; MATRIX: AIR; RANGE: 0.01 MG/SAMPLE;PROCEDURE: ADSORPTION ON CHARCOAL DESORPTION WITH CARBON DISULFIDE, GC;

http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:1:labm (1 of 3) [21/04/2001 9:16:57 AM]

PRECISION: NOT GIVEN.[U.S. Department of Health and Human Services, Public Health Service.Centers for Disease Control, National Institute for OccupationalSafety and Health. NIOSHManual of Analytical Methods, 3rd ed. Volumes1 and 2 with 1985 supplement, and revisions. Washington, DC: U.S.Government Printing Office, February 1984.,p. V1 2500-2]**PEERREVIEWED**






Activated charcoal, Ambersorb XE-348, and Amberlites XAD-2, XAD-4, and XAD-7 were evaluated as


solid adsorbents for work-room air sampling of acetone, methyl ethyl ketone, methyl isobutyl ketone,methyl n-butyl ketone, cyclohexanone and isophorone. Activated charcoal had good capacity for thecompounds investigated, but most ketones decomposed on this adsorbent during storage. AmbersorbXE-348 also showed good capacity for most of the ketones and decomposition was insignificant.[Levin JO, Carleborg L; Ann Occup Hyg 31 (1): 31-8 (1987)]**PEERREVIEWED**






Venous blood sampled after 2 or more hr of exposure. Processed by Gas Chromatography, FID. Range:0.1 to 8 ug/ml. Precision: 0.095 (1 ug/ml blood).[U.S. Department of Health and Human Services, Public Health Service.Centers for Disease Control, National Institute for OccupationalSafety and Health. NIOSHManual of Analytical Methods, 3rd ed. Volumes1 and 2 with 1985 supplement, and revisions. Washington, DC: U.S.Government Printing Office, February 1984.,p. V1 8002-1]**PEERREVIEWED**



http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:1:clab [21/04/2001 9:16:59 AM]








http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:1:alab [21/04/2001 9:17:00 AM]







http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:1:samp [21/04/2001 9:17:02 AM]


Special References:

Special Reports:








http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:1:sref [21/04/2001 9:17:04 AM]


Special Reports:








http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:1:rpts [21/04/2001 9:17:06 AM]



Synonyms:















MEK

http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:1:syni (1 of 2) [21/04/2001 9:17:08 AM]

**PEER REVIEWED**

METHYL ACETONE**PEER REVIEWED**
















RTECS Number:

NIOSH/EL6475000



Synonyms:















MEK**PEER REVIEWED**

METHYL ACETONE

http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:1:sy (1 of 2) [21/04/2001 9:17:10 AM]

**PEER REVIEWED**










http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:1:shpn [21/04/2001 9:17:12 AM]




http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:1:stcc [21/04/2001 9:17:14 AM]





http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:1:hazn [21/04/2001 9:17:15 AM]


RTECS Number:

NIOSH/EL6475000

http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:1:rtec [21/04/2001 9:17:16 AM]






Update History:

Complete Update on 03/24/2000, 1 field added/edited/deleted.Complete Update on 02/02/2000, 1 field added/edited/deleted.Complete Update on 11/16/1999, 1 field added/edited/deleted.Complete Update on 09/21/1999, 1 field added/edited/deleted.Complete Update on 08/26/1999, 1 field added/edited/deleted.Complete Update on 07/20/1999, 5 fields added/edited/deleted.Complete Update on 03/29/1999, 2 fields added/edited/deleted.Field Update on 03/19/1999, 1 field added/edited/deleted.Complete Update on 03/01/1999, 1 field added/edited/deleted.Complete Update on 01/20/1999, 1 field added/edited/deleted.Complete Update on 11/12/1998, 1 field added/edited/deleted.Complete Update on 09/11/1998, 1 field added/edited/deleted.Complete Update on 06/02/1998, 1 field added/edited/deleted.Complete Update on 02/25/1998, 1 field added/edited/deleted.Complete Update on 01/26/1998, 82 fields added/edited/deleted.Field Update on 10/17/1997, 1 field added/edited/deleted.Field Update on 09/08/1997, 5 fields added/edited/deleted.Field Update on 08/13/1997, 5 fields added/edited/deleted.Complete Update on 03/27/1997, 2 fields added/edited/deleted.Complete Update on 02/24/1997, 1 field added/edited/deleted.Complete Update on 12/11/1996, 1 field added/edited/deleted.Complete Update on 06/06/1996, 1 field added/edited/deleted.Complete Update on 04/09/1996, 8 fields added/edited/deleted.Field Update on 01/18/1996, 1 field added/edited/deleted.Complete Update on 11/10/1995, 1 field added/edited/deleted.Complete Update on 01/23/1995, 1 field added/edited/deleted.Complete Update on 12/19/1994, 1 field added/edited/deleted.Complete Update on 11/18/1994, 1 field added/edited/deleted.Complete Update on 09/16/1994, 1 field added/edited/deleted.Complete Update on 08/31/1994, 1 field added/edited/deleted.Complete Update on 07/28/1994, 1 field added/edited/deleted.Complete Update on 03/25/1994, 1 field added/edited/deleted.Complete Update on 08/07/1993, 1 field added/edited/deleted.

http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:1:adm (1 of 2) [21/04/2001 9:17:18 AM]

Complete Update on 08/04/1993, 1 field added/edited/deleted.Field update on 12/10/1992, 1 field added/edited/deleted.Complete Update on 11/25/1992, 1 field added/edited/deleted.Complete Update on 10/07/1992, 1 field added/edited/deleted.Complete Update on 09/03/1992, 1 field added/edited/deleted.Complete Update on 04/27/1992, 1 field added/edited/deleted.Complete Update on 01/23/1992, 1 field added/edited/deleted.Complete Update on 05/21/1990, 1 field added/edited/deleted.Complete Update on 04/16/1990, 2 fields added/edited/deleted.Complete Update on 01/11/1990, 2 fields added/edited/deleted.Field update on 12/29/1989, 1 field added/edited/deleted.Complete Update on 07/28/1989, 85 fields added/edited/deleted.Field Update on 05/05/1989, 1 field added/edited/deleted.Complete Update on 08/15/1988, 102 fields added/edited/deleted.Complete Update on 03/31/1986





http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:1:DOCNO [21/04/2001 9:17:19 AM]



http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:1:date [21/04/2001 9:17:20 AM]



http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:1:rvdt [21/04/2001 9:17:22 AM]


Update History:

Complete Update on 03/24/2000, 1 field added/edited/deleted.Complete Update on 02/02/2000, 1 field added/edited/deleted.Complete Update on 11/16/1999, 1 field added/edited/deleted.Complete Update on 09/21/1999, 1 field added/edited/deleted.Complete Update on 08/26/1999, 1 field added/edited/deleted.Complete Update on 07/20/1999, 5 fields added/edited/deleted.Complete Update on 03/29/1999, 2 fields added/edited/deleted.Field Update on 03/19/1999, 1 field added/edited/deleted.Complete Update on 03/01/1999, 1 field added/edited/deleted.Complete Update on 01/20/1999, 1 field added/edited/deleted.Complete Update on 11/12/1998, 1 field added/edited/deleted.Complete Update on 09/11/1998, 1 field added/edited/deleted.Complete Update on 06/02/1998, 1 field added/edited/deleted.Complete Update on 02/25/1998, 1 field added/edited/deleted.Complete Update on 01/26/1998, 82 fields added/edited/deleted.Field Update on 10/17/1997, 1 field added/edited/deleted.Field Update on 09/08/1997, 5 fields added/edited/deleted.Field Update on 08/13/1997, 5 fields added/edited/deleted.Complete Update on 03/27/1997, 2 fields added/edited/deleted.Complete Update on 02/24/1997, 1 field added/edited/deleted.Complete Update on 12/11/1996, 1 field added/edited/deleted.Complete Update on 06/06/1996, 1 field added/edited/deleted.Complete Update on 04/09/1996, 8 fields added/edited/deleted.Field Update on 01/18/1996, 1 field added/edited/deleted.Complete Update on 11/10/1995, 1 field added/edited/deleted.Complete Update on 01/23/1995, 1 field added/edited/deleted.Complete Update on 12/19/1994, 1 field added/edited/deleted.Complete Update on 11/18/1994, 1 field added/edited/deleted.Complete Update on 09/16/1994, 1 field added/edited/deleted.Complete Update on 08/31/1994, 1 field added/edited/deleted.Complete Update on 07/28/1994, 1 field added/edited/deleted.Complete Update on 03/25/1994, 1 field added/edited/deleted.Complete Update on 08/07/1993, 1 field added/edited/deleted.Complete Update on 08/04/1993, 1 field added/edited/deleted.Field update on 12/10/1992, 1 field added/edited/deleted.Complete Update on 11/25/1992, 1 field added/edited/deleted.Complete Update on 10/07/1992, 1 field added/edited/deleted.Complete Update on 09/03/1992, 1 field added/edited/deleted.Complete Update on 04/27/1992, 1 field added/edited/deleted.Complete Update on 01/23/1992, 1 field added/edited/deleted.

http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:1:updt (1 of 2) [21/04/2001 9:17:24 AM]

Complete Update on 05/21/1990, 1 field added/edited/deleted.Complete Update on 04/16/1990, 2 fields added/edited/deleted.Complete Update on 01/11/1990, 2 fields added/edited/deleted.Field update on 12/29/1989, 1 field added/edited/deleted.Complete Update on 07/28/1989, 85 fields added/edited/deleted.Field Update on 05/05/1989, 1 field added/edited/deleted.Complete Update on 08/15/1988, 102 fields added/edited/deleted.Complete Update on 03/31/1986

http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:1:updt (2 of 2) [21/04/2001 9:17:24 AM]



http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:1:RLN [21/04/2001 9:17:25 AM]



All 4 peroxides are irritants of the skin and mucous membranes; however, the effects of methyl ethylketone (MEK, or 2-butanone) and cyclohexanone peroxides are much greater than those of benzoyl anddicumyl peroxides. The relevance of studies on hemolytic effects of the peroxides to occupationalexposure of man is uncertain, and there are no other conclusive reports of systemic toxic effects.[Aringer L; Arbetarskyddsstyrelsen, Publikationsservice, 171 84 Solna,Sweden, 64 pp. (1985)]**PEER REVIEWED**



Interactions:

In vivo, methyl ethyl ketone peroxide damaged microsomal cytochrome p450 and chytochrome p450mediated peroxidase in vitamin E-deficient rat liver. Dietary vitamin E treatment of rats protected themicrosomal enzymes from peroxide damage. In vivo, adequate levels of vitamin E and of NADH andNADPH are probably necessary to provide important protection to the endoplasmic reticulum duringmetabolism of methyl ethyl ketone peroxide.[Ando M, Tappel AL; Chem Biol Interact 55 (3): 317-26 (1985)]**PEERREVIEWED**





CONCN SOLN ARE CORROSIVE TO SKIN & MUCOUS MEMBRANE.[Gosselin, R.E., R.P. Smith, H.C. Hodge. Clinical Toxicology ofCommercial Products. 5th ed. Baltimore: Williams and Wilkins, 1984.,p.II-108]**PEER REVIEWED**

ALL ... /PEROXIDE CATALYSTS/ ARE DANGEROUS TO SKIN & IN PARTICULAR TOMUCOUS MEMBRANE OF EYE ... LIQ PEROXIDES CAN BE ABSORBED BY SKIN,PARTICULARLY METHYL ETHYL KETONE PEROXIDE, WHICH CAN CAUSE CERTAINPHYSIOLOGICAL DISORDERS (HEMOLYTIC ANEMIA).[Lefaux, R. Practical Toxicology of Plastics. Cleveland: CRC PressInc., 1968. 145]**PEER REVIEWED**

13 CASES OF ACUTE POISONING WITH KETONOX WERE DESCRIBED. THE EFFECTS OFPOISON RESEMBLED THOSE OBSERVED AFTER POISONING WITH LYES OR ACIDS, WITHVOMITING & GASTRIC MUCOSA DAMAGE INCLUDING NECROSIS. THE TOXIC ORAL DOSEWAS BETWEEN 50 & 100 ML.[WOJDYLA Z ET AL; ARCH MED SADOWEJ KRYMINOL 29 (3): 199-205(1979)]**PEER REVIEWED**

... Severe eye hazard.[International Labour Office. Encyclopedia of Occupational Health andSafety. Vols. I&II. Geneva, Switzerland: International Labour Office,1983. 1611]**PEER REVIEWED**

Suicidal ingestion of the peroxide of methyl ethyl ketone caused a severe metabolic acidosis, hemolysis,esophageal and gastric necrosis, gastric perforation, and death.[Ellenhorn, M.J. and D.G. Barceloux. Medical Toxicology - Diagnosisand Treatment of Human Poisoning. New York, NY: Elsevier SciencePublishing Co., Inc. 1988. 1000]**PEER REVIEWED**


Fatal massive peripheral zonal hepatic necrosis developed in a 47 yr old man who accidentally ingested asolution of methyl ethyl ketone peroxide in dimethyl phthalate. Such solutions contain about 10% activeoxygen. The clinical course was characterized by temporary cardiac arrest, abdominal burns, severe


metabolic acidosis, rapid hepatic failure, rhabdomyolysis and respiratory insufficiency. A fatal outcomeresulted 4 days afterwards from hepatic coma associated with blood coagulation disorders. Microscopicalexamination revealed massive periportal hepatic necrosis accompanied by atypical pseudoductularproliferation. The proliferating cells were probably of bile duct origin and exhibited atypia and mitoses.[Karhunen PJ et al; Hum Exp Toxicol 9 (3): 197-200 (1990)]**PEERREVIEWED**

This compound ... has a workplace exposure limit of 0.2 ppm (1.5 mg/cu m), which is a ceiling limit andshould not be exceeded at any time during the work shift. It is a respiratory tract irritant and a severe eyeand skin irritant. The maximum nonirritating strength for skin was 1.5%, for eyes 0.6%. Skin irritationwas delayed, with erythema and edema appearing within 2 to 3 days. Eyes washed within 4 sec afterexposure resulted in no adverse effects. However, it has been noted that single MEK peroxide exposuresto the eye can exacerbate preexisting corneal and limbal disease.[Clayton, G.D., F.E. Clayton (eds.) Patty's Industrial Hygiene andToxicology. Volumes 2A, 2B, 2C, 2D, 2E, 2F: Toxicology. 4th ed. NewYork, NY: John Wiley & Sons Inc., 1993-1994. 562]**PEER REVIEWED**

Human exposure attests to the corrosive nature of this compound, causing chemical burns of thegastrointestinal tract with residual scarring and stricture of the esophagus. Death 2 to 3 days later was dueto hepatic failure after ingestion of this material. An oral dose of 50 to 100 ml is toxic and potentiallylethal to adults.[Clayton, G.D., F.E. Clayton (eds.) Patty's Industrial Hygiene andToxicology. Volumes 2A, 2B, 2C, 2D, 2E, 2F: Toxicology. 4th ed. NewYork, NY: John Wiley & Sons Inc., 1993-1994. 562]**PEER REVIEWED**

The main toxic effect of most peroxides is irritation of skin, mucous membranes and eyes. Prolonged orintense skin contact or splashes in the eyes may cause severe injury. /Peroxides, Organic and Inorganic/[International Labour Office. Encyclopaedia of Occupational Health andSafety. 4th edition, Volumes 1-4 1998. Geneva, Switzerland:International Labour Office, 1998.,p. 104.349]**PEER REVIEWED**


... Methyl ethyl ketone peroxide ... /is/ extremely irritating and corrosive to the eyes, with risk ofblindness ... .[International Labour Office. Encyclopedia of Occupational Health andSafety. Vols. I&II. Geneva, Switzerland: International Labour Office,1983. 1613]**PEER REVIEWED**

Populations at Special Risk:

Individuals with eye, skin, and chronic respiratory diseases /may be/ at an increased risk. /Hydrogenperoxide/[Mackison, F. W., R. S. Stricoff, and






HSDB

Item 3 of 140



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Absorption, Distribution &Excretion

Interactions

Pharmacology

Interactions


N-NITROSONORNICOTINECASRN: 16543-55-8For other data, click on the Table of Contents



Classification of carcinogenicity: 1) No adequate data areavailable in humans; 2) evidence in animals: Sufficient.Overall summary evaluation of carcinogenic risk to humans isGroup 2B: The agent is possibly carcinogenic to humans./From table/[IARC. Monographs on the Evaluation of theCarcinogenic Risk of Chemicals to Man.Geneva: World Health Organization,International Agency for Research onCancer,1972-PRESENT. (Multivolumework).,p. S7 68 (1987)]**PEER REVIEWED**


... SUFFICIENT EVIDENCE OF CARCINOGENIC EFFECT

... IN SEVERAL EXPTL ANIMAL SPECIES. ... NOEPIDEMIOLOGICAL DATA ... AVAILABLE ... SHOULDBE REGARDED FOR PRACTICAL PURPOSES AS IF ITWERE CARCINOGENIC TO HUMANS.[IARC. Monographs on the Evaluation of theCarcinogenic Risk of Chemicals to Man.Geneva: World Health Organization,International Agency for Research onCancer,1972-PRESENT. (Multivolumework).,p. V17 284 (1978)]**PEER REVIEWED**

MORE THAN 10% OF THE NORNICOTINE PRESENT INTOBACCO SMOKE IS DISSOLVED IN SALIVA DURINGSMOKING.[SCHWEINSBERG F ET AL; Z KREBSFORSCH KLINONKOL 84 (1): 81 (1975)]**PEER REVIEWED**

Reverse cigar smokers (who hold the burning end of cigarswithin the mouth), dippers (who place a mixture of Khaini





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tobacco and slaked lime into the lower gingival groove) andusers of tobacco containing toothpaste (gudakhu) in Orissa,India, were examined for precancerous oral lesions, thefrequency of micronucleated cells at 3 different intra-oral sites,and levels of tobacco specific nitrosamines (TSNA) in thesaliva. Among reverse cigar smokers, a high incidence ofleukokeratosis nicotina palati, an elevated frequency ofmicronucleated cells in the palate (2.5% as compared to 0.6%in non-smokers and non-chewers of tobacco) and tongue(2.1%) from which carcinomas preferentially develop, and upto 5890 ppb N-nitrosonornicotine and up to 1880 ppbN-nitrosoanatabine in the saliva were found. Among Khainitobacco chewers, the frequency of micronucleated cells waselevated to 2.1% in the gingival groove, and up to 1580 ngN-nitrosonornicotine, 690 ng N-nitrosoanatabine, 90 ngN-nitrosoanabasine, and 180 ng4-(methyl-N-nitrosamino)-1-(3-pyridyl)-1-butanone) per mlof saliva were observed. The localized elevation of thefrequency of micronuclei and cancer development is probablydue to a synergistic effect of hyperthermia and tobacco relatedcarcinogens among reverse cigar smokers, and to the close,prolonged contact between the mucosa and tobacco amongKhaini tobacco/slaked lime dippers. Neither precancerouslesions nor an elevated frequency of micronuclei were seen inthe oral mucosa of users of gudakhu, a tobacco containingtoothpaste, which may be due to the low amount of tobaccospecific nitrosasmines released from the gudakhu and the shortexposure time, which is restricted to the period of toothbrushing.[Stich HF et al; Int J Can 50 (2): 172-6(1992)]**PEER REVIEWED**

Toombak is a type of snuff used extensively in the NorthernSudan by a virtually nonsmoking/nondrinking population. ThisSudanese snuff contains inordinately high levels of thetobacco-specific nitrosamine (TSNAs) N'-nitrosonornicotine(NNN) and (4-methylnitrosamino)-1-(3-pyridyl)1-butanone(NNK). These are considered to be major contributors to theinduction of cancers of the aerodigestive tract in tobaccochewers, snuff dippers, and smokers. To determine if toombakuse may be associated with the induction of mutations in thep53 tumor suppressor gene, we screened four head and necksquamous cell carcinomas (SCCs) obtained from threetoombak-using patients and one non-toombak-using patientusing polymerase chain reaction/single-strandedconformational polymorphism analysis and DNA sequencing.



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Preventive Measures


Storage Conditions

Cleanup Methods

Disposal Methods


Major Uses

Manufacturers


U. S. Production

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p53 mutations were found in tumors resected from two of threetoombak-using patients, one at codon 282 (CGGarg-TGGtrp)and the other in intron 6 (AT - GC). No p53 mutations wereobserved in the tumor from the non-toombak-using patient.The observed mutations were similar in spectrum to thoseinduced by nitrosamines in mouse lung tumors. No K-ras(codons 12 and 13) or H-ras (codon 12) mutations were foundin any of the tumors. ... toombak components such astobacco-specific nitrosamines may induce p53 mutations inhead and neck squamous cell carcinomas and are likelycontributors to the tobacco-induced carcinogenic load inhumans.[Lazarus P et al; Cancer Detection andPrevention 20 (4): 270-78 (1996)]**PEERREVIEWED**

... Oral keratinocytes were grown to 90% confluence fromexplants of human labial and gingival mucosa ... Epithelialmonolayers were subsequently subcultured and then treated for1 hours with aqueous extracts of moist or leaf smokelesstobacco, or with 0.25 to 1.0 ng/ml of three common smokelesstobacco carcinogens:4-(N-methyl-N-nitrosamino)-1-(3-pyridinyl)-1-butanone;N-nitrosonornicotine; and benzo(a)pyrene. Even though thecontrols and most treatment groups terminally differentiated,cells exposed to4-(N-methyl-N-nitrosamino)-1-(3-pyridinyl)-1-butanone,N-nitrosonornicotine, and moist and dry extract continued todivide, maintained a differentiated phenotype for 8.5 to 10weeks in culture, and displayed focal growth and morphologicchanges suggestive of early stages in cell transformation.[Murrah VA et al; Oral Surg Oral Med OralPathol 75 (3): 323-332 (1993)]**PEERREVIEWED**

Medical Surveillance:

PRECAUTIONS FOR "CARCINOGENS": Whenever medicalsurveillance is indicated, in particular when exposure to acarcinogen has occurred, ad hoc decisions should be takenconcerning ... /cytogenetic and/or other/ tests that mightbecome useful or mandatory. /Chemical Carcinogens/[Montesano, R., H. Bartsch, E.Boyland, G.Della Porta, L. Fishbein, R. A. Griesemer,A.B. Swan, L. Tomatis, and W. Davis(eds.). Handling Chemical Carcinogens inthe Laboratory:Problems of Safety. IARC



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Scientific Publications No. 33. Lyon,France: International Agency for Researchon Cancer, 1979. 23]**PEER REVIEWED**


N-Nitrosonornicotine has been found in a variety of tobaccoproducts (chewing tobacco, snuff, cigarettes and cigars), inmainstream and sidestream smoke from cigars and cigarettes,and in the saliva of tobacco chewers and oral snuff users(1);thus there is widespread exposure to N-nitrosonornicotineamong users of tobacco products and those exposed tosidestream smoke(1).[(1) IARC; IARC Monographs on theEvaluation of Carcinogenic Risks to Humans37: 241-58 (1985)]**PEER REVIEWED**

Body Burden:

The saliva of long term oral snuff users has been found tocontain N-nitrosonornicotine levels of 0.003 to 0.4 ug/g(1).The saliva of tobacco chewers had levels of 16.5 to 59.7ng/ml(1). N-Nitrosonornicotine was not detected in thecombined gastric juices of 14 volunteers who each smoked 28cigarettes per day(1).[(1) IARC; IARC Monographs on theEvaluation of Carcinogenic Risks to Humans37: 241-58 (1985)]**PEER REVIEWED**





In vitro damage by methyl ethyl ketone peroxide to cytochrome p450 and its associated enzymaticactivity was studied. The extent of methyl ethyl ketone peroxide inhibition was different fortetramethylphenylenediamine-peroxidase, NADH-peroxidase, and aminopyrine demethylase. In vitroaddition of methyl ethyl ketone peroxide induced production of more thiobarbituric acid reactingsubstances in liver microsomes from vitamin E deficient rats than from vitamin E supplemented rats.When NADH and/or NADPH were supplied as reductants of methyl ethyl ketone peroxide, theinhibition of aminopyrine demethylase activity and the generation of thiobarbituric acid reactingsubstances by added methyl ethyl ketone peroxide were markedly reduced.[Ando M, Tappel AL; Chem Biol Interact 55 (3): 317-26 (1985)]**PEERREVIEWED**



Interactions:

The tumor promoting effect of methyl ethyl ketone peroxide and the influence of diethyl maleate on thiseffect, with ultraviolet radiation as the tumor initiator, was studied in hairless albino mutant mice. Fourgroups of 24 animals were irradiated with ultraviolet light at a daily dose of 2,054 Joules/sq m, 5 daysper week. Three weeks after completion of irradiation, the animals received skin applications twiceweekly for 25 weeks of either 1 microgram per microliter diethyl maleate in acetone, acetone alonefollowed by 0.5 microgram per microliter methyl ethyl ketone peroxide in dibutyl phthalate, or dibutylphthalate alone. Other groups of animals were treated with chemicals without ultraviolet lightpretreatment. The animals were killed after 46 weeks and examined for tumors. The great majority ofanimals with tumors were in the irradiated groups. The highest tumor yield occurred in mice exposed toboth dibutyl phthalate and methyl ethyl ketone peroxide after untraviolet light. Dibutyl maleate alonehad no measureable effect on the development of tumors. Methyl ethyl ketone peroxide produced anincrease in tumor prevalence, but the effect was less marked than in the combined presence of methylethyl ketone peroxide and diethyl maleate.[Logani MK et al; Food Chem Toxicol 22 (11): 879-882 (1984)]**PEERREVIEWED**




Rats fed a vitamin E deficient diet from age 3-10 weeks were either maintained on a vitamin E deficientdiet or fed a vitamin E enriched diet for 8 subsequent weeks. The content of vitamin E, endoperoxidederived malonaldehyde, lipofluorescent material and polyunsaturated fatty acids, and the activities ofcatalase, glutathione reductase, and glutathione peroxidase were then measured in cerebral tissues, withor without intoxication with methyl ethyl ketone peroxide. For this purpose, one half of the animals ineach vitamin E group received a ip injection of 5 mg methyl ethyl ketone peroxide per kg of bodyweight, which was followed 44 hr later, ie, 4 hr before sample collection, by a second ip injection of 15mg methyl ethyl ketone peroxide per kg of body weight. Despite the fact that the vitamin Econcentration was twelve times lower in the brain of vitamin E deficient rats, no significant changes inother cerebral parameters was found between the two groups of animals. In contrast, the activity ofselenium glutathione peroxidase was markedly decrease in the liver of 10 week old vitamin E deficientrats. Unexpectedly, acute systemic intoxication with methyl ehtyl ketone peroxide caused only a small,albeit significant, decrease in glutathione reductase activity in the brain of vitamin E sufficient rats, whileno significant change in other cerebral parameters was observed in either group of animals.[Chaudiere J et al; Neurotoxicology 9 (2): 173-9 (1988)]**PEERREVIEWED**



Interactions:

Male Sprague-Dawley rats were fed 0, 3, 5 or 10 IU of DL-alpha-tocopherol acetate per kg of diet for 12wk. After 11 weeks they were injected with 3.3 mg of methyl ethyl ketone peroxide (MEKP)/kg bodywt & after 12 wk with 13 mg methyl ethyl ketone peroxide/kg body wt 3-4 hr before decapitation. In theabsence of vitamin E, rat brain DNA was significantly damaged by the formation of DNA-proteincrosslinks & interstrand DNA crosslinks. Adequate dietary vitamin E protected against this damage. 10IU/kg was the adequate dose.[Summerfield FW, Tappel AL; Mutat Res 126 (2): 113-20 (1984)]**PEERREVIEWED**




The stability of glutathione peroxidase was assessed in vivo via oxidative inactivation by methyl ethylketone peroxide. The stability of glutathione peroxidase was compared to other enzymes. Some of theenzymes tested were very stable to methyl ethyl ketone peroxide. Glutathione peroxidase in the absenceof glutathione was relatively slowly inactivated. Thus, glutathione peroxidase appears to be a relativelystable enzyme & is well suited to perform its role in peroxide detoxification & prevention of oxidativedeterioration of cells.[Condell RA, Tappel AL; Arch Biochem Biophys 223 (2): 407-16(1983)]**PEER REVIEWED**




EXPLOSIVE DECOMP @ 230 DEG F. ... IT IS POSSIBLE FOR METHYL ETHYL KETONEPEROXIDE TO EXIST IN SEVERAL DIFFERENT STRUCTURES, SOME OF WHICH AREEXTREMELY SHOCK SENSITIVE, EVEN IN 60% CONCN. ... SPONTANEOUS CHEMICALREACTION ... OR EXPLOSION MAY OCCUR IF MIXED WITH READILY OXIDIZABLE,ORGANIC OR FLAMMABLE MATERIALS OR CHEMICAL ACCELERANTS. /METHYL ETHYLKETONE PEROXIDE DILUTED WITH 40% DIMETHYL PHTHALATE OR OTHER DILUENTS/[National Fire Protection Association. Fire Protection Guide onHazardous Materials. 9th ed. Boston, MA: National Fire ProtectionAssociation, 1986.,p. 49-50]**PEER REVIEWED**

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Lupersol DEL /is/ a trade mark for 60% methyl ethyl ketone peroxide in dimethyl phthalate; LupersolDSW /is/ a proprietary trade name for methyl ethyl ketone. A liq fire resistant peroxide containing11.5% active oxygen.[Gardner, W., E.I. Cooke and R.W.I. Cooke (eds.). Handbook of ChemicalSynonyms and Trade Names. 8th ed. Boca Raton, Florida: CRC Press,Inc., 1978. 430]**PEER REVIEWED**

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WEAR SELF-CONTAINED BREATHING APPARATUS; WEAR GOGGLES IF EYE PROTECTIONNOT PROVIDED. /METHYL ETHYL KETONE PEROXIDE WITH 40% DIMETHYLPHTHALATE OR OTHER DILUENTS/[National Fire Protection Association. Fire Protection Guide onHazardous Materials. 9th ed. Boston, MA: National Fire ProtectionAssociation, 1986.,p. 49-159]**PEER REVIEWED**

http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:2:equp~1 [21/04/2001 9:20:05 AM]



Embryotoxicity studies were conducted in 3 day old chicken embryos using the air chamber method. Thepotencies were expressed by the ED50 for the total embryotoxic effect of the chemicals, including deaths& malformations, up to day 14 of the incubation. All nine peroxides including methyl ethyl ketoneperoxide caused malformations at a moderate frequency.[Korhonen A et al; Environ Res 33 (1): 54-61 (1984)]**PEER REVIEWED**




On repeated thrice weekly dosing of rats for 7 wk ip and by mouth at one-fifth the LD50, markedevidence of cumulative effect was observed; 2 of 5 rats died from the ip admin, all 5 died by the oralroute... Hyperemia of the lungs with petechiae and gross hemorrhages were common and only findings inthe lung of rats exposed for 4 hr to methyl ethyl ketone peroxide vapor. In the liver, occasional damageconsisting of fatty changes in cells in the central portion of the lobule and incr in number of round cellsin the portal spaces; in the kidney, a granula precipitate or cast in the lumina of the convuluted tubulesand desquamation of the epithelium of the proximal tubules.[American Conference of Governmental Industrial Hygienists.Documentation of the Threshold Limit Values and Biological ExposureIndices. 5th ed. Cincinnati, OH:American Conference of GovernmentalIndustrial Hygienists, 1986. 396]**PEER REVIEWED**




Methyl ethyl ketone peroxide ... /was/ tested by applying two drops of 40% solution in dimethylphthalate to rabbit eyes, and ... found to cause severe damage, graded 6 on a scale of 0 to 7. (The solventwas not significantly injurious.) At 3% a moderate reaction occurred lasting for two days, followed byrapid improvement. Washing the eyes with water within four seconds after application prevented injuryof the eye in all cases.[Grant, W.M. Toxicology of the Eye. 3rd ed. Springfield, IL: CharlesC. Thomas Publisher, 1986. 618]**PEER REVIEWED**




DECOMP BY HEAT & SUNLIGHT. /METHYL ETHYL KETONE PEROXIDE WITH 40%DIMETHYL PHTHALATE OR OTHER DILUENTS/[National Fire Protection Association. Fire Protection Guide onHazardous Materials. 9th ed. Boston, MA: National Fire ProtectionAssociation, 1986.,p. 49-50]**QC REVIEWED**

http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:2:dcmp~0 [21/04/2001 9:20:11 AM]


Synonyms:





Vigorous decomp can be stimulated by even trace amt of a wide variety of contaminants, such as strongacids, bases, metals, metal alloys and salts, sulfur cmpd, amines, accelerators or reducing agents. This isparticularly true of methyl ethyl ketone and benzoyl peroxides, which are intentionally stimulated todecomp @ room temp using small amt of accelerators.[International Labour Office. Encyclopedia of Occupational Health andSafety. Vols. I&II. Geneva, Switzerland: International Labour Office,1983. 1613]**PEER REVIEWED**

http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:2:reac~0 [21/04/2001 9:20:13 AM]


Special Reports:

DHHS/NTP; NTP Technical Report on Toxicity Studies of Methyl Ethyl Ketone Peroxide in DimethylPhthalate Administered Topically to F344/N Rats and B6C3F1 Mice NTP TOX 18 (1993) NIH Pub No.93-3341



Fire Potential:

COMBUSTIBLE LIQUID. ... SELF-ACCELERATING DECOMP TEMP OF THE 40% DIMETHYLPHTHALATE SOLN, 145 DEG F. ... DANGEROUS WHEN EXPOSED TO HEAT & FLAMES./METHYL ETHYL KETONE PEROXIDE DILUTED WITH 40% DIMETHYL PHTHALATE OROTHER DILUENTS/[National Fire Protection Association. Fire Protection Guide onHazardous Materials. 9th ed. Boston, MA: National Fire ProtectionAssociation, 1986.,p. 49-50]**QC REVIEWED**

http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:2:fpot~0 [21/04/2001 9:20:15 AM]



Reaction of methyl ethyl ketone with hydrogen peroxide (peroxidation)[Ashford, R.D. Ashford's Dictionary of Industrial Chemicals. London,England: Wavelength Publications Ltd., 1994. 583]**PEER REVIEWED**

http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:2:mmfg~0 [21/04/2001 9:20:17 AM]


Flash Point:

125-200 Deg F (micro open cup) /Methyl ethyl ketone peroxide diluted with 40% dimethyl phthalate orother diluents/[National Fire Protection Association. Fire Protection Guide onHazardous Materials. 9th ed. Boston, MA: National Fire ProtectionAssociation, 1986.,p. 49-50]**QC REVIEWED**

http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:2:flpt~0 [21/04/2001 9:20:18 AM]



Fatal massive peripheral zonal hepatic necrosis developed in a 47 yr old man who accidentally ingested asolution of methyl ethyl ketone peroxide in dimethyl phthalate. Such solutions contain about 10% activeoxygen. The clinical course was characterized by temporary cardiac arrest, abdominal burns, severemetabolic acidosis, rapid hepatic failure, rhabdomyolysis and respiratory insufficiency. A fatal outcomeresulted 4 days afterwards from hepatic coma associated with blood coagulation disorders. Microscopicalexamination revealed massive periportal hepatic necrosis accompanied by atypical pseudoductularproliferation. The proliferating cells were probably of bile duct origin and exhibited atypia and mitoses.[Karhunen PJ et al; Hum Exp Toxicol 9 (3): 197-200 (1990)]**PEERREVIEWED**



Cleanup Methods:

IN THE EVENT OF SPILLAGE AS A RESULT OF FIRE AND/OR USE THE SPILLED MATERIALSHOULD BE ABSORBED ... WITH A NONCOMBUSTIBLE ABSORBENT, SUCH ASVERMICULITE. SWEEP UP & PLACE IN PLASTIC CONTAINER FOR IMMEDIATE DISPOSAL.DO NOT USE SPARK-GENERATING METALS OR CELLULOSIC MATERIALS ... FORSWEEPING UP OR HANDLING ... DISPOSE OF ABSORBED PEROXIDE IN SMALLQUANTITIES AT A TIME BY PLACING ... IN A REMOTE OUTDOOR AREA & IGNITING ...EMPTY PEROXIDE CONTAINERS SHOULD BE WASHED WITH 10% SODIUM HYDROXIDESOLN. /METHYL ETHYL KETONE PEROXIDE DILUTED WITH 40% DIMETHYLPHTHALATE OR OTHER DILUENTS/[National Fire Protection Association. Fire Protection Guide onHazardous Materials. 9th ed. Boston, MA: National Fire ProtectionAssociation, 1986.,p. 49-50]**PEER REVIEWED**

http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:2:clup~0 [21/04/2001 9:20:22 AM]


Storage Conditions:

SHOULD BE STORED IN COOL, VENTILATED, UNHEATED WELL-DETACHED,NONCOMBUSTIBLE BUILDING WITH NONCOMBUSTIBLE FLOORS. ISOLATE FROM OTHERSTORED MATERIALS, PARTICULARLY ACCELERATORS, READILY OXIDIZABLE,ORGANIC OR FLAMMABLE MATERIALS. PROHIBIT POSSIBLE SOURCES OF IGNITION,INCL ELECTRICAL INSTALLATIONS ... LARGE-QUANTITY STORAGE SHOULD BEPROTECTED BY AUTOMATIC DELUGE SPRINKLER SYSTEM. PROTECT CONTAINERSAGAINST PHYSICAL DAMAGE. /METHYL ETHYL KETONE PEROXIDE DILUTED WITH40% DIMETHYL PHTHALATE OR OTHER DILUENTS/[National Fire Protection Association. Fire Protection Guide onHazardous Materials. 9th ed. Boston, MA: National Fire ProtectionAssociation, 1986.,p. 49-50]**QC REVIEWED**

http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:2:strg~0 [21/04/2001 9:20:23 AM]







FIGHT FIRES FROM EXPLOSION-RESISTANT LOCATION. IN ADVANCED OR MASSIVEFIRES, AREA SHOULD BE EVACUATED. IF FIRE OCCURS IN VICINITY OF THIS MATERIALWATER SHOULD BE USED TO KEEP CONTAINERS COOL. ... DUE CAUTION SHOULD BEEXERCISED BECAUSE OF THE POSSIBILITY OF ADVERSE CONTAMINATION AND CHEMCHANGE AFTER HEAT EXPOSURE. /METHYL ETHYL KETONE PEROXIDE DILUTED WITH40% DIMETHYL PHTHALATE OR OTHER DILUENTS/[National Fire Protection Association. Fire Protection Guide onHazardous Materials. 9th ed. Boston, MA: National Fire ProtectionAssociation, 1986.,p. 49-50]**PEER REVIEWED**

http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:2:firp~0 [21/04/2001 9:20:26 AM]




http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:2:seri~0 [21/04/2001 9:20:27 AM]


Interactions:

Vitamin E, selenium, vitamin C, & methionine were admin to rats in various combinations by diet & ipinjections to rank the individual & combined protective ability of the biological antioxidants at minimumdaily requirement levels & at pharmacological levels against lipid peroxidation initiated by 50 mgmethyl ethyl ketone peroxide (MEKP)/kg. In vivo lipid peroxidation was monitored throughout a 3 hrperiod by measuring pentane expired in the breath. Rats fed 30 IU DL-alpha-tocopherol acetate/mg dietsignificantly decreased pentane production at 20 min by 88% compared to rats fed a vitamin E- &selenium-deficient diet. Rats given 5 ip injections of 180 IU DL-alpha-tocopherol acetate/kg furtherreduced expired pentane by 83% beyond the protection afforded by dietary vitamin E. Neither additivenor synergistic protection was found when other antioxidants were given in combination with vitamin E.Vitamin E was primary protective antioxidant. Pentane expired by individual rats from various treatmentgroups strongly correlated with the plasma vitamin E status.[Litov RE et al; Toxicol Appl Pharmacol 59 (1): 96-106 (1981)]**PEERREVIEWED**




NIOSH Method 3508. Determination of Methyl Ethyl Ketone Peroxide by Visible AbsorptionSpectrophotometry.[U.S. Department of Health and Human Services, Public Health Service,Centers for Disease Control, National Institute for OccupationalSafety and Health. NIOSH Manual of Analytical Methods. 4th ed.MethodsA-Z & Supplements. Washington, DC: U.S. Government Printing Office,Aug 1994.]**PEER REVIEWED**




SHOCK & HEAT SENSITIVE; DECOMP BY HEAT & SUNLIGHT. /METHYL ETHYL KETONEPEROXIDE WITH 40% DIMETHYL PHTHALATE OR OTHER DILUENTS/[National Fire Protection Association. Fire Protection Guide onHazardous Materials. 9th ed. Boston, MA: National Fire ProtectionAssociation, 1986.,p. 49-50]**PEER REVIEWED**

http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:2:ssl~1 [21/04/2001 9:20:32 AM]










Fatal massive peripheral zonal hepatic necrosis developed in a 47 yr old man who accidentally ingested asolution of methyl ethyl ketone peroxide in dimethyl phthalate. Such solutions contain about 10% activeoxygen. The clinical course was characterized by temporary cardiac arrest, abdominal burns, severe


metabolic acidosis, rapid hepatic failure, rhabdomyolysis and respiratory insufficiency. A fatal outcomeresulted 4 days afterwards from hepatic coma associated with blood coagulation disorders. Microscopicalexamination revealed massive periportal hepatic necrosis accompanied by atypical pseudoductularproliferation. The proliferating cells were probably of bile duct origin and exhibited atypia and mitoses.[Karhunen PJ et al; Hum Exp Toxicol 9 (3): 197-200 (1990)]**PEERREVIEWED**







Individuals with eye, skin, and chronic respiratory diseases /may be/ at an increased risk. /Hydrogenperoxide/[Mackison, F. W., R. S. Stricoff, and L. J. Partridge, Jr. (eds.).NIOSH/OSHA - Occupational Health Guidelines for Chemical Hazards.DHHS(NIOSH) PublicationNo. 81-123 (3 VOLS). Washington, DC: U.S.Government Printing Office, Jan. 1981. 1]**PEER REVIEWED**



NIOSH (NOES Survey 1981-1983) has statistically estimated that 16,366 workers are potentiallyexposed to 2-butanone peroxide in the US(1). Analysis of 35 air samples collected in the workingenvironments of 5 Swedish plants manufacturing reinforced plastics detected 2-butanone peroxide in 13samples above the detection limit (0.1 mg/cu m) with a maximum concn of 72 mg/cu m(2). Occupationalexposure to 2-butanone peroxide may occur through inhalation and dermal contact with this compoundat workplaces where 2-butanone peroxide is produced or used(SRC). Consumer exposure may occurduring the use of fiber glass resin kits for boat and automobile repair(4).[(1) NIOSH; National Occupational Exposure Survey (NOES) (1983) (2)Bachs A, Runmark S; Inst Vatten-Luftvaardsforsk., Publ. IVL B 836(1986) (3) Manly, TD; Industrial Chemist 32: 271-6 (1956) (4) GalvinJB, Farr C; Patty's Indust Hyg Toxicol. 4th. Clayton GC, Clayton FE,eds. NY, NY: Wiley IIA: 562 (1993)]**PEER REVIEWED**










Fatal massive peripheral zonal hepatic necrosis developed in a 47 yr old man who accidentally ingested asolution of methyl ethyl ketone peroxide in dimethyl phthalate. Such solutions contain about 10% activeoxygen. The clinical course was characterized by temporary cardiac arrest, abdominal burns, severemetabolic acidosis, rapid hepatic failure, rhabdomyolysis and respiratory insufficiency. A fatal outcomeresulted 4 days afterwards from hepatic coma associated with blood coagulation disorders. Microscopical


examination revealed massive periportal hepatic necrosis accompanied by atypical pseudoductularproliferation. The proliferating cells were probably of bile duct origin and exhibited atypia and mitoses.[Karhunen PJ et al; Hum Exp Toxicol 9 (3): 197-200 (1990)]**PEERREVIEWED**







Individuals with eye, skin, and chronic respiratory diseases /may be/ at an increased risk. /Hydrogenperoxide/[Mackison, F. W., R. S. Stricoff, and L. J. Partridge, Jr. (eds.).NIOSH/OSHA - Occupational Health Guidelines for Chemical Hazards.DHHS(NIOSH) PublicationNo. 81-123 (3 VOLS). Washington, DC: U.S.Government Printing Office, Jan. 1981. 1]**PEER REVIEWED**

http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:2:popl [21/04/2001 9:20:39 AM]




http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:2:rtex [21/04/2001 9:20:40 AM]




Peroxides should be washed promptly from the skin to prevent irritation. In the case of eye contact, theeyes should be flushed immediately with large amounts of water, and medical attention should beobtained. ... Medical attention should also be obtained in case of accidental ingestion. ... /Peroxides,Organic and Inorganic/[International Labour Office. Encyclopaedia of Occupational Health andSafety. 4th edition, Volumes 1-4 1998. Geneva, Switzerland:International Labour Office, 1998.,p. 104.350]**PEER REVIEWED**

http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:2:emerg [21/04/2001 9:20:42 AM]



Peroxides should be washed promptly from the skin to prevent irritation. In the case of eye contact, theeyes should be flushed immediately with large amounts of water, and medical attention should beobtained. ... Medical attention should also be obtained in case of accidental ingestion. ... /Peroxides,Organic and Inorganic/[International Labour Office. Encyclopaedia of Occupational Health andSafety. 4th edition, Volumes 1-4 1998. Geneva, Switzerland:International Labour Office, 1998.,p. 104.350]**PEER REVIEWED**

http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:2:antr [21/04/2001 9:20:43 AM]








Rats fed a vitamin E deficient diet from age 3-10 weeks were either maintained on a vitamin E deficientdiet or fed a vitamin E enriched diet for 8 subsequent weeks. The content of vitamin E, endoperoxide


derived malonaldehyde, lipofluorescent material and polyunsaturated fatty acids, and the activities ofcatalase, glutathione reductase, and glutathione peroxidase were then measured in cerebral tissues, withor without intoxication with methyl ethyl ketone peroxide. For this purpose, one half of the animals ineach vitamin E group received a ip injection of 5 mg methyl ethyl ketone peroxide per kg of bodyweight, which was followed 44 hr later, ie, 4 hr before sample collection, by a second ip injection of 15mg methyl ethyl ketone peroxide per kg of body weight. Despite the fact that the vitamin Econcentration was twelve times lower in the brain of vitamin E deficient rats, no significant changes inother cerebral parameters was found between the two groups of animals. In contrast, the activity ofselenium glutathione peroxidase was markedly decrease in the liver of 10 week old vitamin E deficientrats. Unexpectedly, acute systemic intoxication with methyl ehtyl ketone peroxide caused only a small,albeit significant, decrease in glutathione reductase activity in the brain of vitamin E sufficient rats, whileno significant change in other cerebral parameters was observed in either group of animals.[Chaudiere J et al; Neurotoxicology 9 (2): 173-9 (1988)]**PEERREVIEWED**

A dose of 0.29 umol/egg caused early deaths in 50% of treated eggs /3 day old chicken embryos/ andmalformations in 40% of the survivors. The authors classified MEK peroxide as a moderately potentembryo toxin. However, the relevance of these data in relation to humans is unknown. The test methodapplied solutions directly to the inner membrane, focusing it on the embryo. It is unlikely these data canbe accurately extrapolated to humans owing to the direct delivery of the dose.[Clayton, G.D., F.E. Clayton (eds.) Patty's Industrial Hygiene andToxicology. Volumes 2A, 2B, 2C, 2D, 2E, 2F: Toxicology. 4th ed. NewYork, NY: John Wiley & Sons Inc., 1993-1994. 562]**PEER REVIEWED**

Subchronic oral exposures three times a week for 7 weeks at one fifth the LD50 caused all five rats todie. Necropsy revealed mild liver damage with glycogen depletion. These data suggest accumulation ofthe material in the body.[Clayton, G.D., F.E. Clayton (eds.) Patty's Industrial Hygiene andToxicology. Volumes 2A, 2B, 2C, 2D, 2E, 2F: Toxicology. 4th ed. NewYork, NY: John Wiley & Sons Inc., 1993-1994. 562]**PEER REVIEWED**


LD50 Rat oral 6.86 ml/kg[Budavari, S. (ed.). The Merck Index - Encyclopedia of Chemicals,Drugs and Biologicals. Rahway, NJ: Merck and Co., Inc., 1989.956]**PEER REVIEWED**

LC50 Mouse /inhalation/ 170 ppm/4 hr[American Conference of Governmental Industrial Hygienists.Documentation of the Threshold Limit Values and Biological ExposureIndices. 5th ed. Cincinnati, OH:American Conference of GovernmentalIndustrial Hygienists, 1986. 396]**PEER REVIEWED**

LC50 Rat /inhalation/ 200 ppm/4 hr[American Conference of Governmental Industrial Hygienists.Documentation of the Threshold Limit Values and Biological ExposureIndices. 5th ed. Cincinnati, OH:American Conference of Governmental


Industrial Hygienists, 1986. 396]**PEER REVIEWED**

LD50 Rat ip 65 mg/kg[American Conference of Governmental Industrial Hygienists.Documentation of the Threshold Limit Values and Biological ExposureIndices. 5th ed. Cincinnati, OH:American Conference of GovernmentalIndustrial Hygienists, 1986. 396]**PEER REVIEWED**

LD50 Rat oral gavage 484 mg/kg[American Conference of Governmental Industrial Hygienists.Documentation of the Threshold Limit Values and Biological ExposureIndices. 5th ed. Cincinnati, OH:American Conference of GovernmentalIndustrial Hygienists, 1986. 396]**PEER REVIEWED**








Rats fed a vitamin E deficient diet from age 3-10 weeks were either maintained on a vitamin E deficientdiet or fed a vitamin E enriched diet for 8 subsequent weeks. The content of vitamin E, endoperoxidederived malonaldehyde, lipofluorescent material and polyunsaturated fatty acids, and the activities ofcatalase, glutathione reductase, and glutathione peroxidase were then measured in cerebral tissues, withor without intoxication with methyl ethyl ketone peroxide. For this purpose, one half of the animals in


each vitamin E group received a ip injection of 5 mg methyl ethyl ketone peroxide per kg of bodyweight, which was followed 44 hr later, ie, 4 hr before sample collection, by a second ip injection of 15mg methyl ethyl ketone peroxide per kg of body weight. Despite the fact that the vitamin Econcentration was twelve times lower in the brain of vitamin E deficient rats, no significant changes inother cerebral parameters was found between the two groups of animals. In contrast, the activity ofselenium glutathione peroxidase was markedly decrease in the liver of 10 week old vitamin E deficientrats. Unexpectedly, acute systemic intoxication with methyl ehtyl ketone peroxide caused only a small,albeit significant, decrease in glutathione reductase activity in the brain of vitamin E sufficient rats, whileno significant change in other cerebral parameters was observed in either group of animals.[Chaudiere J et al; Neurotoxicology 9 (2): 173-9 (1988)]**PEERREVIEWED**

A dose of 0.29 umol/egg caused early deaths in 50% of treated eggs /3 day old chicken embryos/ andmalformations in 40% of the survivors. The authors classified MEK peroxide as a moderately potentembryo toxin. However, the relevance of these data in relation to humans is unknown. The test methodapplied solutions directly to the inner membrane, focusing it on the embryo. It is unlikely these data canbe accurately extrapolated to humans owing to the direct delivery of the dose.[Clayton, G.D., F.E. Clayton (eds.) Patty's Industrial Hygiene andToxicology. Volumes 2A, 2B, 2C, 2D, 2E, 2F: Toxicology. 4th ed. NewYork, NY: John Wiley & Sons Inc., 1993-1994. 562]**PEER REVIEWED**

Subchronic oral exposures three times a week for 7 weeks at one fifth the LD50 caused all five rats todie. Necropsy revealed mild liver damage with glycogen depletion. These data suggest accumulation ofthe material in the body.[Clayton, G.D., F.E. Clayton (eds.) Patty's Industrial Hygiene andToxicology. Volumes 2A, 2B, 2C, 2D, 2E, 2F: Toxicology. 4th ed. NewYork, NY: John Wiley & Sons Inc., 1993-1994. 562]**PEER REVIEWED**




LD50 Rat oral 6.86 ml/kg[Budavari, S. (ed.). The Merck Index - Encyclopedia of Chemicals,Drugs and Biologicals. Rahway, NJ: Merck and Co., Inc., 1989.956]**PEER REVIEWED**

LC50 Mouse /inhalation/ 170 ppm/4 hr[American Conference of Governmental Industrial Hygienists.Documentation of the Threshold Limit Values and Biological ExposureIndices. 5th ed. Cincinnati, OH:American Conference of GovernmentalIndustrial Hygienists, 1986. 396]**PEER REVIEWED**

LC50 Rat /inhalation/ 200 ppm/4 hr[American Conference of Governmental Industrial Hygienists.Documentation of the Threshold Limit Values and Biological ExposureIndices. 5th ed. Cincinnati, OH:American Conference of GovernmentalIndustrial Hygienists, 1986. 396]**PEER REVIEWED**

LD50 Rat ip 65 mg/kg[American Conference of Governmental Industrial Hygienists.Documentation of the Threshold Limit Values and Biological ExposureIndices. 5th ed. Cincinnati, OH:American Conference of GovernmentalIndustrial Hygienists, 1986. 396]**PEER REVIEWED**

LD50 Rat oral gavage 484 mg/kg[American Conference of Governmental Industrial Hygienists.Documentation of the Threshold Limit Values and Biological ExposureIndices. 5th ed. Cincinnati, OH:American Conference of GovernmentalIndustrial Hygienists, 1986. 396]**PEER REVIEWED**

http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:2:ntxv [21/04/2001 9:20:49 AM]




The stability of glutathione peroxidase was assessed in vivo via oxidative inactivation by methyl ethylketone peroxide. The stability of glutathione peroxidase was compared to other enzymes. Some of theenzymes tested were very stable to methyl ethyl ketone peroxide. Glutathione peroxidase in the absenceof glutathione was relatively slowly inactivated. Thus, glutathione peroxidase appears to be a relativelystable enzyme & is well suited to perform its role in peroxide detoxification & prevention of oxidativedeterioration of cells.[Condell RA, Tappel AL; Arch Biochem Biophys 223 (2): 407-16(1983)]**PEER REVIEWED**

Interactions:



In vivo, methyl ethyl ketone peroxide damaged microsomal cytochrome p450 and chytochrome p450mediated peroxidase in vitamin E-deficient rat liver. Dietary vitamin E treatment of rats protected themicrosomal enzymes from peroxide damage. In vivo, adequate levels of vitamin E and of NADH andNADPH are probably necessary to provide important protection to the endoplasmic reticulum duringmetabolism of methyl ethyl ketone peroxide.


[Ando M, Tappel AL; Chem Biol Interact 55 (3): 317-26 (1985)]**PEERREVIEWED**

The tumor promoting effect of methyl ethyl ketone peroxide and the influence of diethyl maleate on thiseffect, with ultraviolet radiation as the tumor initiator, was studied in hairless albino mutant mice. Fourgroups of 24 animals were irradiated with ultraviolet light at a daily dose of 2,054 Joules/sq m, 5 daysper week. Three weeks after completion of irradiation, the animals received skin applications twiceweekly for 25 weeks of either 1 microgram per microliter diethyl maleate in acetone, acetone alonefollowed by 0.5 microgram per microliter methyl ethyl ketone peroxide in dibutyl phthalate, or dibutylphthalate alone. Other groups of animals were treated with chemicals without ultraviolet lightpretreatment. The animals were killed after 46 weeks and examined for tumors. The great majority ofanimals with tumors were in the irradiated groups. The highest tumor yield occurred in mice exposed toboth dibutyl phthalate and methyl ethyl ketone peroxide after untraviolet light. Dibutyl maleate alonehad no measureable effect on the development of tumors. Methyl ethyl ketone peroxide produced anincrease in tumor prevalence, but the effect was less marked than in the combined presence of methylethyl ketone peroxide and diethyl maleate.[Logani MK et al; Food Chem Toxicol 22 (11): 879-882 (1984)]**PEERREVIEWED**



Interactions:




The tumor promoting effect of methyl ethyl ketone peroxide and the influence of diethyl maleate on thiseffect, with ultraviolet radiation as the tumor initiator, was studied in hairless albino mutant mice. Fourgroups of 24 animals were irradiated with ultraviolet light at a daily dose of 2,054 Joules/sq m, 5 daysper week. Three weeks after completion of irradiation, the animals received skin applications twiceweekly for 25 weeks of either 1 microgram per microliter diethyl maleate in acetone, acetone alonefollowed by 0.5 microgram per microliter methyl ethyl ketone peroxide in dibutyl phthalate, or dibutylphthalate alone. Other groups of animals were treated with chemicals without ultraviolet lightpretreatment. The animals were killed after 46 weeks and examined for tumors. The great majority ofanimals with tumors were in the irradiated groups. The highest tumor yield occurred in mice exposed toboth dibutyl phthalate and methyl ethyl ketone peroxide after untraviolet light. Dibutyl maleate alone


had no measureable effect on the development of tumors. Methyl ethyl ketone peroxide produced anincrease in tumor prevalence, but the effect was less marked than in the combined presence of methylethyl ketone peroxide and diethyl maleate.[Logani MK et al; Food Chem Toxicol 22 (11): 879-882 (1984)]**PEERREVIEWED**



Pharmacology:

Interactions:




The tumor promoting effect of methyl ethyl ketone peroxide and the influence of diethyl maleate on thiseffect, with ultraviolet radiation as the tumor initiator, was studied in hairless albino mutant mice. Fourgroups of 24 animals were irradiated with ultraviolet light at a daily dose of 2,054 Joules/sq m, 5 daysper week. Three weeks after completion of irradiation, the animals received skin applications twiceweekly for 25 weeks of either 1 microgram per microliter diethyl maleate in acetone, acetone alonefollowed by 0.5 microgram per microliter methyl ethyl ketone peroxide in dibutyl phthalate, or dibutylphthalate alone. Other groups of animals were treated with chemicals without ultraviolet lightpretreatment. The animals were killed after 46 weeks and examined for tumors. The great majority of


animals with tumors were in the irradiated groups. The highest tumor yield occurred in mice exposed toboth dibutyl phthalate and methyl ethyl ketone peroxide after untraviolet light. Dibutyl maleate alonehad no measureable effect on the development of tumors. Methyl ethyl ketone peroxide produced anincrease in tumor prevalence, but the effect was less marked than in the combined presence of methylethyl ketone peroxide and diethyl maleate.[Logani MK et al; Food Chem Toxicol 22 (11): 879-882 (1984)]**PEERREVIEWED**





2-Butanone peroxide's use in the production of unsaturated polyester resin crosslinking agents, and alsoits use as a curing agent with polyester resins for adhesives, plastics, lacquers, and fiber glass resin kitsfor boat and automobile body repair, may result in its release to the environment through various wastestreams. 2-Butanone peroxide is a mixture dimers (50%), trimers (25%), and monomer peroxycompounds. If released to air, estimated vapor pressures ranging between 1.4X10-3 and 2X10-3 mm Hgat 25 deg C indicate 2-butanone peroxide will exist solely in the vapor-phase. Vapor-phase 2-butanoneperoxide will be degraded in the atmosphere by reaction with photochemically-produced hydroxylradicals; the half-lives for this reaction in air are estimated to range between 1.5 and 2 days. 2-Butanoneperoxide may react with organic materials in water or soil since it is a strong oxidizing agent. If releasedto soil, 2-butanone peroxide's mobility is expected to range from very high, to essentially immobilebased upon an estimated Koc range of 10 to 11,000. Volatilization from moist soil surfaces is notexpected to be an important fate process based upon an estimated Henry's Law constant range of1X10-10 to2X10-8 atm-cu m/mole. If released into water, some portions of the 2-butanone peroxidemixture are expected to adsorb to suspended solids and sediment based upon the higher values of theestimated Koc range. Volatilization from water surfaces is not expected to be an important fate processbased upon this compound's range of estimated Henry's Law constants. An estimated BCF of 13 suggeststhe potential for bioconcentration in aquatic organisms is low. Hydrolysis is not expected to occur due tothe lack of hydrolyzable functional groups. Occupational exposure to 2-butanone peroxide may occurthrough inhalation and dermal contact with this compound at workplaces where 2-butanone peroxide isproduced or used. Consumer exposure may occur during the use of fiber glass resin kits for boat andautomobile repair. (SRC)**PEER REVIEWED**





2-Butanone peroxide's use in the production of unsaturated polyester resin crosslinking agents(1), andalso its use as a curing agent with polyester resins for adhesives, plastics, lacquers, and fiber glass resinkits for boat and automobile body repair(2), may result in consumer exposure and its release to theenvironment through various waste streams(SRC). 2-Butanone has been qualitatively detected inambient air samples collected in the vicinity of a fiberglassing plant(3), which suggests that thecompound can be emitted to the atmosphere at sites where it is produced or used in the production ofpolymers(SRC).[(1) Ashford RD; Ashford's Dictionary of Industrial Chemicals:Properties, Production, Uses; London, England: Wavelength Publ, Ltdp.583 (1994) (2) Harris RL et al, eds; Patty's Industrial Hygiene andToxicology. 3rd ed NY, NY: John Wiley and Sons Inc, 3A: 562 (1994) (3)US EPA; Statement of Research Needs for Methyl Ethyl Ketone Peroxide.Contract No. 68-C8-0004 (Task 122). US EPA-ECAO, Cincinnati, OH(1989)]**PEER REVIEWED**

Environmental Fate:

TERRESTRIAL FATE: 2-Butanone peroxide is a mixture of dimers (50%), and trimers (25%), andmonomer peroxy compounds(5). Based on a classification scheme(1), an estimated Koc range of 10 to11,000(SRC), determined from a structure estimation method(2), indicates that 2-butanone peroxide'smobility in soil is expected to range from very high, to essentially immobile based upon an estimatedKoc range of 10 to 11,000(SRC). Volatilization of 2-butanone peroxide from moist soil surfaces is notexpected to be an important fate process(SRC) given an estimated Henry's Law constant range of1X10-10 to 2X10-8 atm-cu m/mole(SRC), using a fragment constant estimation method(3). 2-Butanoneperoxide is not expected to volatilize from dry soil surfaces(SRC) based upon an estimated vaporpressure range of 1.4X10-3 to 2X10-3 mm Hg(SRC), determined from a fragment constant method(4).[(1) Swann RL et al; Res Rev 85: 17-28 (1983) (2) Meylan WM et al;Environ Sci Technol 26: 1560-67 (1992) (3) Meylan WM, Howard PH;Environ Toxicol Chem 10: 1283-93 (1991) (4) Lyman WJ; p. 31 inEnvironmental Exposure From Chemicals Vol I, Neely WB, Blau GE, eds,Boca Raton, FL: CRC Press (1985) (5) Ashford RD; Ashford's Dictionaryof Industrial Chemicals. London, England: Wavelength Publ, Ltd p. 583(1994)]**PEER REVIEWED**

AQUATIC FATE: 2-Butanone peroxide is a mixture dimers (50%), trimers (25%), and monomerperoxy compounds(8). Based on a classification scheme(1), an estimated Koc range of 10 to11,000(SRC), determined from an estimation method(2), indicates that some portions of 2-butanoneperoxide mixture are not expected to adsorb to suspended solids and sediment(SRC), other portions ofthe mixture are expected to adsorb strongly. 2-Butanone peroxide may react with organic materials inwater expected(3) based upon estimated Henry's Law constants ranging between 1X10-10 and 2X10-8atm-cu m/mole(SRC), developed using a fragment constant estimation method(4). According to aclassification scheme(5), an estimated BCF of 13(SRC), from an estimated log Kow of 2(6) and aregression-derived equation(7), suggests the potential for bioconcentration in aquatic organisms is low.[(1) Swann RL et al; Res Rev 85: 17-28 (1983) (2) Meylan WM et al;Environ Sci Technol 26: 1560-67 (1992) (3) Lyman WJ et al; Handbook ofChemical Property Estimation Methods. Washington, DC: Amer Chem Soc


pp. 4-9, 15-1 to 15-29 (1990) (4) Meylan WM, Howard PH; EnvironToxicol Chem 10: 1283-93 (1991) (5) Franke C et al; Chemosphere 29:1501-14 (1994) (6) Meylan WM, Howard PH; J Pharm Sci 84: 83-92 (1995)(7) Meylan WM et al; Environ Toxicol Chem 18: 664-72 (1999) (8)Ashford RD; Ashford's Dictionary of Industrial Chemicals. London,England: Wavelength Publ, Ltd p. 583 (1994)]**PEER REVIEWED**

ATMOSPHERIC FATE: 2-Butanone peroxide is a mixture dimers (50%), trimers (25%), and monomerperoxy compounds(4). According to a model of gas/particle partitioning of semivolatile organiccompounds in the atmosphere(1), the 2-butanone peroxide mixture, which has estimated vapor pressuresranging between 1.4X10-3 and 2X10-3 mm Hg at 25 deg C(SRC), determined from a fragment constantmethod(2), is expected to exist solely in the vapor-phase in the ambient atmosphere. Vapor-phase2-butanone peroxide is degraded in the atmosphere by reaction with photochemically-producedhydroxyl radicals(SRC); the half-life for this reaction in air is estimated to range from 1.5 to 2days(SRC), calculated from its rate constant range of 9X10-12 to 11X10-12 cu cm/molecule-sec at 25deg C(SRC)determined using a structure estimation method(3).[(1) Bidleman TF; Environ Sci Technol 22: 361-367 (1988) (2) Lyman WJ;p. 31 in Environmental Exposure From Chemicals Vol I, Neely WB, BlauGE, eds, Boca Raton, FL: CRC Press (1985) (3) Meylan WM, Howard PH;Chemosphere 26: 2293-99 (1993) (4) Ashford RD; Ashford's Dictionary ofIndustrial Chemicals. London, England: Wavelength Publ, Ltd p. 583(1994)]**PEER REVIEWED**


2-Butanone peroxide is a mixture dimers (50%), trimers (25%), and monomer peroxy compounds(5).The rate constant for the vapor-phase reaction of 2-butanone peroxide with photochemically-producedhydroxyl radicals has been estimated to range between 9X10-12 and 11X10-12 cu cm/molecule-sec at 25deg C(SRC) using a structure estimation method(1). This corresponds to atmospheric half-lives ofapproximately 1.5 to 2 days at an atmospheric concentration of 5X10+5 hydroxyl radicals per cu cm(1).2-Butanone peroxide is not expected to undergo hydrolysis in the environment due to the lack ofhydrolyzable functional groups(2) nor to directly photolyze due to the lack of absorption in theenvironmental UV spectrum. Normal heating decomposes 2-butanone peroxide at approximately 120deg C(3). 2-Butanone peroxide is a strong oxidizing agent and contact with organic materials(4).[(1) Meylan WM, Howard PH; Chemosphere 26: 2293-99 (1993) (2) Lyman WJet al; Handbook of Chemical Property Estimation Methods. Washington,DC: Amer Chem Soc pp. 7-4, 7-5 (1990) (3) Manly, TD; IndustrialChemist 32: 271-6 (1956) (4) Lewis RJ Sr, ed; Hawley's CondensedChemical Dictionary, 13th ed. NY, NY: Van Nostrand Reinhold Co. p. 737(1997) (5) Ashford RD; Ashford's Dictionary of Industrial Chemicals.London, England: Wavelength Publ, Ltd p. 583 (1994)]**PEER REVIEWED**


An estimated BCF of 13 was calculated for the 2-butanone peroxide mixture(SRC), using an estimatedlog Kow of 2(1) and a regression-derived equation(2). According to a classification scheme(3), this BCFsuggests the potential for bioconcentration in aquatic organisms is low. Chemical degradation is expected


to be the dominant fate process in water because of reaction with organic matter and therefore, it isdoubtful that un-reacted 2-butanone peroxide would be biologically available(SRC).[(1) Meylan WM, Howard PH; J Pharm Sci 84: 83-92 (1995) (2) Meylan WMet al; Environ Toxicol Chem 18: 664-72 (1999) (3) Franke C et al;Chemosphere 29: 1501-14 (1994)]**PEER REVIEWED**


2-Butanone peroxide is a mixture dimers (50%), trimers (25%), and monomer peroxy compounds(3).Using a structure estimation method based on molecular connectivity indices(1), the Koc for 2-butanoneperoxide can be estimated to range from 10 to 11,000(SRC). According to a classification scheme(2), thisestimated Koc range suggests that some portions of the 2-butanone peroxide mixture are expected tohave very high mobility in soil, whereas other portions of the mixture are expected to be essentiallyimmobile. 2-Butanone peroxide is a strong oxidizing agent(3) and may decompose when brought incontact with organic materials(SRC).[(1) Meylan WM et al; Environ Sci Technol 26: 1560-67 (1992) (2) SwannRL et al; Res Rev 85: 17-28 (1983) (3) Lewis RJ Sr, ed; Hawley'sCondensed Chemical Dictionary. 13th ed. NY, NY: John Wiley and Sons,Inc. p. 737 (1997) (3) Ashford RD; Ashford's Dictionary of IndustrialChemicals. London, England: Wavelength Publ, Ltd p. 583 (1994)]**PEERREVIEWED**


2-Butanone peroxide is a mixture dimers (50%), trimers (25%), and monomer peroxy compounds(3).The Henry's Law constant for 2-butanone peroxide is estimated as a range of 1X10-10 to 2X10-8 atm-cum/mole(SRC) using a fragment constant estimation method(1). This Henry's Law constant rangeindicates that 2-butanone peroxide is expected to be essentially nonvolatile. 2-Butanone peroxide is notexpected to volatilize from dry soil surfaces(SRC) based upon estimated vapor pressures rangingbetween 1.4X10-3 and 2X10-3 mm Hg(SRC), determined from a fragment constant method(2).[(1) Meylan WM, Howard PH; Environ Toxicol Chem 10: 1283-93 (1991) (2)Lyman WJ; p. 31 in Environmental Exposure From Chemicals Vol I, NeelyWB, Blau GE, eds, Boca Raton, FL: CRC Press (1985) (3) Ashford RD;Ashford's Dictionary of Industrial Chemicals. London, England:Wavelength Publ, Ltd p. 583 (1994)]**PEER REVIEWED**


SOURCE DOMINATED: 2-Butanone peroxide has been qualitatively detected in ambient air samplescollected in the vicinity of a fiberglassing plant(1).[(1) US EPA; Statement of Research Needs for Methyl Ethyl KetonePeroxide. Contract No. 68-C8-0004 (Task 122). US EPA-ECAO, Cincinnati,OH (1989)]**PEER REVIEWED**




2-Butanone peroxide's use in the production of unsaturated polyester resin crosslinking agents, and alsoits use as a curing agent with polyester resins for adhesives, plastics, lacquers, and fiber glass resin kitsfor boat and automobile body repair, may result in its release to the environment through various wastestreams. 2-Butanone peroxide is a mixture dimers (50%), trimers (25%), and monomer peroxycompounds. If released to air, estimated vapor pressures ranging between 1.4X10-3 and 2X10-3 mm Hgat 25 deg C indicate 2-butanone peroxide will exist solely in the vapor-phase. Vapor-phase 2-butanoneperoxide will be degraded in the atmosphere by reaction with photochemically-produced hydroxylradicals; the half-lives for this reaction in air are estimated to range between 1.5 and 2 days. 2-Butanoneperoxide may react with organic materials in water or soil since it is a strong oxidizing agent. If releasedto soil, 2-butanone peroxide's mobility is expected to range from very high, to essentially immobilebased upon an estimated Koc range of 10 to 11,000. Volatilization from moist soil surfaces is notexpected to be an important fate process based upon an estimated Henry's Law constant range of1X10-10 to2X10-8 atm-cu m/mole. If released into water, some portions of the 2-butanone peroxidemixture are expected to adsorb to suspended solids and sediment based upon the higher values of theestimated Koc range. Volatilization from water surfaces is not expected to be an important fate processbased upon this compound's range of estimated Henry's Law constants. An estimated BCF of 13 suggeststhe potential for bioconcentration in aquatic organisms is low. Hydrolysis is not expected to occur due tothe lack of hydrolyzable functional groups. Occupational exposure to 2-butanone peroxide may occurthrough inhalation and dermal contact with this compound at workplaces where 2-butanone peroxide isproduced or used. Consumer exposure may occur during the use of fiber glass resin kits for boat andautomobile repair. (SRC)**PEER REVIEWED**

http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:2:envs [21/04/2001 9:21:00 AM]



2-Butanone peroxide's use in the production of unsaturated polyester resin crosslinking agents(1), andalso its use as a curing agent with polyester resins for adhesives, plastics, lacquers, and fiber glass resinkits for boat and automobile body repair(2), may result in consumer exposure and its release to theenvironment through various waste streams(SRC). 2-Butanone has been qualitatively detected inambient air samples collected in the vicinity of a fiberglassing plant(3), which suggests that thecompound can be emitted to the atmosphere at sites where it is produced or used in the production ofpolymers(SRC).[(1) Ashford RD; Ashford's Dictionary of Industrial Chemicals:Properties, Production, Uses; London, England: Wavelength Publ, Ltdp.583 (1994) (2) Harris RL et al, eds; Patty's Industrial Hygiene andToxicology. 3rd ed NY, NY: John Wiley and Sons Inc, 3A: 562 (1994) (3)US EPA; Statement of Research Needs for Methyl Ethyl Ketone Peroxide.Contract No. 68-C8-0004 (Task 122). US EPA-ECAO, Cincinnati, OH(1989)]**PEER REVIEWED**

http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:2:arts [21/04/2001 9:21:02 AM]


Environmental Fate:

TERRESTRIAL FATE: 2-Butanone peroxide is a mixture of dimers (50%), and trimers (25%), andmonomer peroxy compounds(5). Based on a classification scheme(1), an estimated Koc range of 10 to11,000(SRC), determined from a structure estimation method(2), indicates that 2-butanone peroxide'smobility in soil is expected to range from very high, to essentially immobile based upon an estimatedKoc range of 10 to 11,000(SRC). Volatilization of 2-butanone peroxide from moist soil surfaces is notexpected to be an important fate process(SRC) given an estimated Henry's Law constant range of1X10-10 to 2X10-8 atm-cu m/mole(SRC), using a fragment constant estimation method(3). 2-Butanoneperoxide is not expected to volatilize from dry soil surfaces(SRC) based upon an estimated vaporpressure range of 1.4X10-3 to 2X10-3 mm Hg(SRC), determined from a fragment constant method(4).[(1) Swann RL et al; Res Rev 85: 17-28 (1983) (2) Meylan WM et al;Environ Sci Technol 26: 1560-67 (1992) (3) Meylan WM, Howard PH;Environ Toxicol Chem 10: 1283-93 (1991) (4) Lyman WJ; p. 31 inEnvironmental Exposure From Chemicals Vol I, Neely WB, Blau GE, eds,Boca Raton, FL: CRC Press (1985) (5) Ashford RD; Ashford's Dictionaryof Industrial Chemicals. London, England: Wavelength Publ, Ltd p. 583(1994)]**PEER REVIEWED**

AQUATIC FATE: 2-Butanone peroxide is a mixture dimers (50%), trimers (25%), and monomerperoxy compounds(8). Based on a classification scheme(1), an estimated Koc range of 10 to11,000(SRC), determined from an estimation method(2), indicates that some portions of 2-butanoneperoxide mixture are not expected to adsorb to suspended solids and sediment(SRC), other portions ofthe mixture are expected to adsorb strongly. 2-Butanone peroxide may react with organic materials inwater expected(3) based upon estimated Henry's Law constants ranging between 1X10-10 and 2X10-8atm-cu m/mole(SRC), developed using a fragment constant estimation method(4). According to aclassification scheme(5), an estimated BCF of 13(SRC), from an estimated log Kow of 2(6) and aregression-derived equation(7), suggests the potential for bioconcentration in aquatic organisms is low.[(1) Swann RL et al; Res Rev 85: 17-28 (1983) (2) Meylan WM et al;Environ Sci Technol 26: 1560-67 (1992) (3) Lyman WJ et al; Handbook ofChemical Property Estimation Methods. Washington, DC: Amer Chem Socpp. 4-9, 15-1 to 15-29 (1990) (4) Meylan WM, Howard PH; EnvironToxicol Chem 10: 1283-93 (1991) (5) Franke C et al; Chemosphere 29:1501-14 (1994) (6) Meylan WM, Howard PH; J Pharm Sci 84: 83-92 (1995)(7) Meylan WM et al; Environ Toxicol Chem 18: 664-72 (1999) (8)Ashford RD; Ashford's Dictionary of Industrial Chemicals. London,England: Wavelength Publ, Ltd p. 583 (1994)]**PEER REVIEWED**

ATMOSPHERIC FATE: 2-Butanone peroxide is a mixture dimers (50%), trimers (25%), and monomerperoxy compounds(4). According to a model of gas/particle partitioning of semivolatile organiccompounds in the atmosphere(1), the 2-butanone peroxide mixture, which has estimated vapor pressuresranging between 1.4X10-3 and 2X10-3 mm Hg at 25 deg C(SRC), determined from a fragment constantmethod(2), is expected to exist solely in the vapor-phase in the ambient atmosphere. Vapor-phase


2-butanone peroxide is degraded in the atmosphere by reaction with photochemically-producedhydroxyl radicals(SRC); the half-life for this reaction in air is estimated to range from 1.5 to 2days(SRC), calculated from its rate constant range of 9X10-12 to 11X10-12 cu cm/molecule-sec at 25deg C(SRC)determined using a structure estimation method(3).[(1) Bidleman TF; Environ Sci Technol 22: 361-367 (1988) (2) Lyman WJ;p. 31 in Environmental Exposure From Chemicals Vol I, Neely WB, BlauGE, eds, Boca Raton, FL: CRC Press (1985) (3) Meylan WM, Howard PH;Chemosphere 26: 2293-99 (1993) (4) Ashford RD; Ashford's Dictionary ofIndustrial Chemicals. London, England: Wavelength Publ, Ltd p. 583(1994)]**PEER REVIEWED**




2-Butanone peroxide is a mixture dimers (50%), trimers (25%), and monomer peroxy compounds(5).The rate constant for the vapor-phase reaction of 2-butanone peroxide with photochemically-producedhydroxyl radicals has been estimated to range between 9X10-12 and 11X10-12 cu cm/molecule-sec at 25deg C(SRC) using a structure estimation method(1). This corresponds to atmospheric half-lives ofapproximately 1.5 to 2 days at an atmospheric concentration of 5X10+5 hydroxyl radicals per cu cm(1).2-Butanone peroxide is not expected to undergo hydrolysis in the environment due to the lack ofhydrolyzable functional groups(2) nor to directly photolyze due to the lack of absorption in theenvironmental UV spectrum. Normal heating decomposes 2-butanone peroxide at approximately 120deg C(3). 2-Butanone peroxide is a strong oxidizing agent and contact with organic materials(4).[(1) Meylan WM, Howard PH; Chemosphere 26: 2293-99 (1993) (2) Lyman WJet al; Handbook of Chemical Property Estimation Methods. Washington,DC: Amer Chem Soc pp. 7-4, 7-5 (1990) (3) Manly, TD; IndustrialChemist 32: 271-6 (1956) (4) Lewis RJ Sr, ed; Hawley's CondensedChemical Dictionary, 13th ed. NY, NY: Van Nostrand Reinhold Co. p. 737(1997) (5) Ashford RD; Ashford's Dictionary of Industrial Chemicals.London, England: Wavelength Publ, Ltd p. 583 (1994)]**PEER REVIEWED**

http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:2:abio [21/04/2001 9:21:05 AM]



An estimated BCF of 13 was calculated for the 2-butanone peroxide mixture(SRC), using an estimatedlog Kow of 2(1) and a regression-derived equation(2). According to a classification scheme(3), this BCFsuggests the potential for bioconcentration in aquatic organisms is low. Chemical degradation is expectedto be the dominant fate process in water because of reaction with organic matter and therefore, it isdoubtful that un-reacted 2-butanone peroxide would be biologically available(SRC).[(1) Meylan WM, Howard PH; J Pharm Sci 84: 83-92 (1995) (2) Meylan WMet al; Environ Toxicol Chem 18: 664-72 (1999) (3) Franke C et al;Chemosphere 29: 1501-14 (1994)]**PEER REVIEWED**

http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:2:bioc [21/04/2001 9:21:07 AM]



2-Butanone peroxide is a mixture dimers (50%), trimers (25%), and monomer peroxy compounds(3).Using a structure estimation method based on molecular connectivity indices(1), the Koc for 2-butanoneperoxide can be estimated to range from 10 to 11,000(SRC). According to a classification scheme(2), thisestimated Koc range suggests that some portions of the 2-butanone peroxide mixture are expected tohave very high mobility in soil, whereas other portions of the mixture are expected to be essentiallyimmobile. 2-Butanone peroxide is a strong oxidizing agent(3) and may decompose when brought incontact with organic materials(SRC).[(1) Meylan WM et al; Environ Sci Technol 26: 1560-67 (1992) (2) SwannRL et al; Res Rev 85: 17-28 (1983) (3) Lewis RJ Sr, ed; Hawley'sCondensed Chemical Dictionary. 13th ed. NY, NY: John Wiley and Sons,Inc. p. 737 (1997) (3) Ashford RD; Ashford's Dictionary of IndustrialChemicals. London, England: Wavelength Publ, Ltd p. 583 (1994)]**PEERREVIEWED**

http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:2:koc [21/04/2001 9:21:08 AM]



2-Butanone peroxide is a mixture dimers (50%), trimers (25%), and monomer peroxy compounds(3).The Henry's Law constant for 2-butanone peroxide is estimated as a range of 1X10-10 to 2X10-8 atm-cum/mole(SRC) using a fragment constant estimation method(1). This Henry's Law constant rangeindicates that 2-butanone peroxide is expected to be essentially nonvolatile. 2-Butanone peroxide is notexpected to volatilize from dry soil surfaces(SRC) based upon estimated vapor pressures rangingbetween 1.4X10-3 and 2X10-3 mm Hg(SRC), determined from a fragment constant method(2).[(1) Meylan WM, Howard PH; Environ Toxicol Chem 10: 1283-93 (1991) (2)Lyman WJ; p. 31 in Environmental Exposure From Chemicals Vol I, NeelyWB, Blau GE, eds, Boca Raton, FL: CRC Press (1985) (3) Ashford RD;Ashford's Dictionary of Industrial Chemicals. London, England:Wavelength Publ, Ltd p. 583 (1994)]**PEER REVIEWED**

http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:2:vws [21/04/2001 9:21:09 AM]



SOURCE DOMINATED: 2-Butanone peroxide has been qualitatively detected in ambient air samplescollected in the vicinity of a fiberglassing plant(1).[(1) US EPA; Statement of Research Needs for Methyl Ethyl KetonePeroxide. Contract No. 68-C8-0004 (Task 122). US EPA-ECAO, Cincinnati,OH (1989)]**PEER REVIEWED**

http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:2:atmc [21/04/2001 9:21:10 AM]




Persons in charge of vessels or facilities are required to notify the National Response Center (NRC)immediately, when there is a release of this designated hazardous substance, in an amount equal to orgreater than its reportable quantity of 10 lb or 4.54 kg. The toll free number of the NRC is (800)424-8802; In the Washington D.C. metropolitan area (202) 426-2675. The rule for determining whennotification is required is stated in 40 CFR 302.4 (section IV. D.3.b).[40 CFR 302.4 (7/1/99)]**PEER REVIEWED**

RCRA Requirements:

U160; As stipulated in 40 CFR 261.33, when 2-butanone peroxide, as a commercial chemical product ormanufacturing chemical intermediate or an off-specification commercial chemical product or amanufacturing chemical intermediate, becomes a waste, it must be managed according to Federal and/orState hazardous waste regulations. Also defined as a hazardous waste is any residue, contaminated soil,water, or other debris resulting from the cleanup of a spill, into water or on dry land, of this waste.Generators of small quantities of this waste may qualify for partial exclusion from hazardous wasteregulations (40 CFR 261.5).[40 CFR 261.33 (7/1/99)]**PEER REVIEWED**

http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:2:estan [21/04/2001 9:21:12 AM]



Persons in charge of vessels or facilities are required to notify the National Response Center (NRC)immediately, when there is a release of this designated hazardous substance, in an amount equal to orgreater than its reportable quantity of 10 lb or 4.54 kg. The toll free number of the NRC is (800)424-8802; In the Washington D.C. metropolitan area (202) 426-2675. The rule for determining whennotification is required is stated in 40 CFR 302.4 (section IV. D.3.b).[40 CFR 302.4 (7/1/99)]**PEER REVIEWED**

http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:2:cerc [21/04/2001 9:21:13 AM]


RCRA Requirements:

U160; As stipulated in 40 CFR 261.33, when 2-butanone peroxide, as a commercial chemical product ormanufacturing chemical intermediate or an off-specification commercial chemical product or amanufacturing chemical intermediate, becomes a waste, it must be managed according to Federal and/orState hazardous waste regulations. Also defined as a hazardous waste is any residue, contaminated soil,water, or other debris resulting from the cleanup of a spill, into water or on dry land, of this waste.Generators of small quantities of this waste may qualify for partial exclusion from hazardous wasteregulations (40 CFR 261.5).[40 CFR 261.33 (7/1/99)]**PEER REVIEWED**

http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:2:rcra [21/04/2001 9:21:15 AM]



Molecular Formula:

C8-H16-O4[Sax, N.I. and R.J. Lewis, Sr. (eds.). Hawley's Condensed ChemicalDictionary. 11th ed. New York: Van Nostrand Reinhold Co., 1987.769]**PEER REVIEWED**

Molecular Weight:

176.24[U.S. Department of Health and Human Services, Public Health Service,Center for Disease Control, National Institute for Occupational SafetyHealth. Registry ofToxic Effects of Chemical Substances (RTECS).National Library of Medicine's current MEDLARS file.,p. 85/8408]**PEERREVIEWED**

Color/Form:

Colorless liquid[Lewis, R.J., Sr (Ed.). Hawley's Condensed Chemical Dictionary. 13thed. New York, NY: John Wiley & Sons, Inc. 1997. 737]**PEER REVIEWED**

Colorless liquid [Note: Explosive decomposition occurs at 230 degrees F].[NIOSH. NIOSH Pocket Guide to Chemical Hazards. DHHS (NIOSH)Publication No. 97-140. Washington, D.C. U.S. Government PrintingOffice, 1997. 208]**PEER REVIEWED**

Odor:

Typical odor-resembles that of acetone.[Gerhartz, W. (exec ed.). Ullmann's Encyclopedia of IndustrialChemistry. 5th ed.Vol A1: Deerfield Beach, FL: VCH Publishers, 1985 toPresent.,p. VA4 (85) 476]**PEER REVIEWED**

Fragrant, mint-like, moderately sharp odor[Clayton, G.D., F.E. Clayton (eds.) Patty's Industrial Hygiene andToxicology. Volumes 2A, 2B, 2C, 2D, 2E, 2F: Toxicology. 4th ed. NewYork, NY: John Wiley & Sons Inc., 1993-1994. 562]**PEER REVIEWED**

Boiling Point:

19 deg C[Dixon D, Rissmann E; Physical-Chemical Properties and Categorizationof RCRA Wastes According to Votality. US USEPA-450/3-85-007 (NTIS


PB85-204527), Springfield, VA: Versar, Inc. p. 35 (1985)]**PEERREVIEWED**

Solubilities:

Partially miscible in water; completely miscible with most organic solvents[Gerhartz, W. (exec ed.). Ullmann's Encyclopedia of IndustrialChemistry. 5th ed.Vol A1: Deerfield Beach, FL: VCH Publishers, 1985 toPresent.,p. VA4 (85) 476]**PEER REVIEWED**


Strong oxidizing agent[Lewis, R.J., Sr (Ed.). Hawley's Condensed Chemical Dictionary. 13thed. New York, NY: John Wiley & Sons, Inc. 1997. 737]**PEER REVIEWED**

Has a 10 hour half-life at 105 deg C[Ashford, R.D. Ashford's Dictionary of Industrial Chemicals. London,England: Wavelength Publications Ltd., 1994. 583]**PEER REVIEWED**

Molecular weights for the monomer, dimers, and trimers are 122.12, 210.22, and 298.34, respectively[Clayton, G.D., F.E. Clayton (eds.) Patty's Industrial Hygiene andToxicology. Volumes 2A, 2B, 2C, 2D, 2E, 2F: Toxicology. 4th ed. NewYork, NY: John Wiley & Sons Inc., 1993-1994. 561]**PEER REVIEWED**



Molecular Formula:

C8-H16-O4[Sax, N.I. and R.J. Lewis, Sr. (eds.). Hawley's Condensed ChemicalDictionary. 11th ed. New York: Van Nostrand Reinhold Co., 1987.769]**PEER REVIEWED**

http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:2:mf [21/04/2001 9:21:18 AM]


Molecular Weight:

176.24[U.S. Department of Health and Human Services, Public Health Service,Center for Disease Control, National Institute for Occupational SafetyHealth. Registry ofToxic Effects of Chemical Substances (RTECS).National Library of Medicine's current MEDLARS file.,p. 85/8408]**PEERREVIEWED**

http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:2:mw [21/04/2001 9:21:19 AM]


Color/Form:

Colorless liquid[Lewis, R.J., Sr (Ed.). Hawley's Condensed Chemical Dictionary. 13thed. New York, NY: John Wiley & Sons, Inc. 1997. 737]**PEER REVIEWED**

Colorless liquid [Note: Explosive decomposition occurs at 230 degrees F].[NIOSH. NIOSH Pocket Guide to Chemical Hazards. DHHS (NIOSH)Publication No. 97-140. Washington, D.C. U.S. Government PrintingOffice, 1997. 208]**PEER REVIEWED**

http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:2:cofo [21/04/2001 9:21:20 AM]


Odor:

Typical odor-resembles that of acetone.[Gerhartz, W. (exec ed.). Ullmann's Encyclopedia of IndustrialChemistry. 5th ed.Vol A1: Deerfield Beach, FL: VCH Publishers, 1985 toPresent.,p. VA4 (85) 476]**PEER REVIEWED**

Fragrant, mint-like, moderately sharp odor[Clayton, G.D., F.E. Clayton (eds.) Patty's Industrial Hygiene andToxicology. Volumes 2A, 2B, 2C, 2D, 2E, 2F: Toxicology. 4th ed. NewYork, NY: John Wiley & Sons Inc., 1993-1994. 562]**PEER REVIEWED**

http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:2:odor [21/04/2001 9:21:21 AM]


Boiling Point:

19 deg C[Dixon D, Rissmann E; Physical-Chemical Properties and Categorizationof RCRA Wastes According to Votality. US USEPA-450/3-85-007 (NTISPB85-204527), Springfield, VA: Versar, Inc. p. 35 (1985)]**PEERREVIEWED**

http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:2:bp [21/04/2001 9:21:23 AM]


Solubilities:

Partially miscible in water; completely miscible with most organic solvents[Gerhartz, W. (exec ed.). Ullmann's Encyclopedia of IndustrialChemistry. 5th ed.Vol A1: Deerfield Beach, FL: VCH Publishers, 1985 toPresent.,p. VA4 (85) 476]**PEER REVIEWED**

http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:2:sol [21/04/2001 9:21:24 AM]



Strong oxidizing agent[Lewis, R.J., Sr (Ed.). Hawley's Condensed Chemical Dictionary. 13thed. New York, NY: John Wiley & Sons, Inc. 1997. 737]**PEER REVIEWED**

Has a 10 hour half-life at 105 deg C[Ashford, R.D. Ashford's Dictionary of Industrial Chemicals. London,England: Wavelength Publications Ltd., 1994. 583]**PEER REVIEWED**

Molecular weights for the monomer, dimers, and trimers are 122.12, 210.22, and 298.34, respectively[Clayton, G.D., F.E. Clayton (eds.) Patty's Industrial Hygiene andToxicology. Volumes 2A, 2B, 2C, 2D, 2E, 2F: Toxicology. 4th ed. NewYork, NY: John Wiley & Sons Inc., 1993-1994. 561]**PEER REVIEWED**

http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:2:ocpp [21/04/2001 9:21:25 AM]



Hazards Summary:

The major hazards encountered in the use and handling of 2-butanone peroxide stem from itstoxicologic properties and explosivity. Toxic by all routes (ie, inhalation, ingestion, dermal absorption),exposure to this colorless liquid may occur from its production or use as a curing agent for plastics andpolyester resins, and as an initiator in the manufacture of polymers. Effects from exposure may includecontact burns to the skin and eyes, hemolytic anemia, shortness-of-breath, or pulmonary edema. OSHAhas established a Ceiling limit of 0.7 ppm as a final rule to become effective December 31, 1992. Inactivities and situations where over-exposure may occur, wear a self-contained breathing apparatus andpersonal protective clothing. If contact should occur, irrigate exposed eyes with copious amounts ofwater for at least 30 minutes, and exposed skin for at least 15 minutes. Contaminated clothing and shoesshould be removed at the site. 2-Butanone peroxide may be ignited by heat, sparks, or flames; burningrapidly and producing poisonous gases. Containers of this substance may explode from friction, heat,mechanical shock, or contamination (such as from trace amounts of strong acids, bases, metals, metalalloys, salts, sulfur compounds, amines, accelerators, or reducing agents). For fires involving thissubstance, extinguish with dry chemical, CO2, regular foam, or water (used in flooding quantities forlarge fires). Fight fire from as far a distance as possible, in an explosion-resistant location. Isolate thearea for 1/2 mile in all directions if a tank, rail car, or tank truck is involved. 2-Butanone peroxideshould be stored in cool, ventilated areas, away from sunlight, sources of ignition, physical damage,shock, and organic or flammable materials. Smalls spills of this substance should be taken up with anoncombustible absorbent such as vermiculite and placed in a plastic container for immediate disposal.Wet down large spills with water and dike for later disposal. This substance is a good candidate for liquidinjection, rotary kiln, or fluidized bed forms of incineration.**PEER REVIEWED**


Fire or explosion: May explode from heat or contamination. May ignite combustibles (wood, paper, oil,clothing, etc.). May be ignited by heat, sparks or flames. May burn rapidly with flare-burning effect.Containers may explode when heated. Runoff may create fire or explosion hazard.[U.S. Department of Transportation. 1996 North American EmergencyResponse Guidebook. A Guidebook for First Responders During theInitial Phase of aHazardous Materials/Dangerous Goods Incident. U.S.Department of Transportation (U.S. DOT) Research and Special ProgramsAdministration, Office of HazardousMaterials Initiatives and Training(DHM-50), Washington, D.C. (1996).,p. G-147]**PEER REVIEWED**

Health: TOXIC; inhalation, ingestion or contact (skin, eyes) with vapors, dusts or substance may causesevere injury, burns, or death. Contact of vapor or substance with eyes may cause blindness withinminutes. Fire may produce irritating, corrosive and/or toxic gases. Toxic fumes or dust may accumulatein confined areas (basement, tanks, hopper/tank cars, etc.). Runoff from fire control or dilution water


may cause pollution.[U.S. Department of Transportation. 1996 North American EmergencyResponse Guidebook. A Guidebook for First Responders During theInitial Phase of aHazardous Materials/Dangerous Goods Incident. U.S.Department of Transportation (U.S. DOT) Research and Special ProgramsAdministration, Office of HazardousMaterials Initiatives and Training(DHM-50), Washington, D.C. (1996).,p. G-147]**PEER REVIEWED**

Public safety: CALL Emergency Response Telephone Number. ... Isolate spill or leak area immediatelyfor at least 25 to 50 meters (80 to 160 feet) in all directions. Keep unauthorized personnel away. Stayupwind. Keep out of low areas.[U.S. Department of Transportation. 1996 North American EmergencyResponse Guidebook. A Guidebook for First Responders During theInitial Phase of aHazardous Materials/Dangerous Goods Incident. U.S.Department of Transportation (U.S. DOT) Research and Special ProgramsAdministration, Office of HazardousMaterials Initiatives and Training(DHM-50), Washington, D.C. (1996).,p. G-147]**PEER REVIEWED**

Protective clothing: Wear positive pressure self-contained breathing apparatus (SCBA). Wear chemicalprotective clothing which is specifically recommended by the manufacturer. Structural firefighters'protective clothing is recommended for fire situations ONLY; it is not effective in spill situations.[U.S. Department of Transportation. 1996 North American EmergencyResponse Guidebook. A Guidebook for First Responders During theInitial Phase of aHazardous Materials/Dangerous Goods Incident. U.S.Department of Transportation (U.S. DOT) Research and Special ProgramsAdministration, Office of HazardousMaterials Initiatives and Training(DHM-50), Washington, D.C. (1996).,p. G-147]**PEER REVIEWED**

Evacuation: Large spill: Consider initial evacuation for at least 250 meters (800 feet). Fire: If tank, railcar or tank truck is involved in a fire, ISOLATE for 800 meters (1/2 mile) in all directions; also, considerinitial evacuation for 800 meters (1/2 mile) in all directions.[U.S. Department of Transportation. 1996 North American EmergencyResponse Guidebook. A Guidebook for First Responders During theInitial Phase of aHazardous Materials/Dangerous Goods Incident. U.S.Department of Transportation (U.S. DOT) Research and Special ProgramsAdministration, Office of HazardousMaterials Initiatives and Training(DHM-50), Washington, D.C. (1996).,p. G-147]**PEER REVIEWED**

Fire: Small fires: Dry chemical, CO2, water spray or regular foam. Large fires: Flood fire area with waterfrom a distance. Do not use straight streams. Move containers from fire area if you can do it without risk.Do not move cargo or vehicle if cargo has been exposed to heat. Fight fire from maximum distance oruse unmanned hose holders or monitor nozzles. Cool containers with flooding quantities of water untilwell after fire is out. ALWAYS stay away from the ends of tanks. For massive fire, use unmanned hoseholders or monitor nozzles; if this is impossible, withdraw from area and let fire burn.[U.S. Department of Transportation. 1996 North American EmergencyResponse Guidebook. A Guidebook for First Responders During theInitial Phase of aHazardous Materials/Dangerous Goods Incident. U.S.


Department of Transportation (U.S. DOT) Research and Special ProgramsAdministration, Office of HazardousMaterials Initiatives and Training(DHM-50), Washington, D.C. (1996).,p. G-147]**PEER REVIEWED**

Spill or leak: ELIMINATE all ignition sources (no smoking, flares, sparks or flames in immediate area).Keep combustibles (wood, paper, oil, etc.) away from spilled material. Do not touch damaged containersor spilled material unless wearing appropriate protective clothing. Keep substance wet using water spray.Stop leak if you can do it without risk. Small spills: Take up with inert, damp, noncombustible materialusing clean non-sparking tools and place into loosely covered plastic containers for later disposal. Largespills: Wet down with water and dike for later disposal. Prevent entry into waterways, sewers, basementsor confined areas. DO NOT CLEAN-UP OR DISPOSE OF, EXCEPT UNDER SUPERVISION OF ASPECIALIST.[U.S. Department of Transportation. 1996 North American EmergencyResponse Guidebook. A Guidebook for First Responders During theInitial Phase of aHazardous Materials/Dangerous Goods Incident. U.S.Department of Transportation (U.S. DOT) Research and Special ProgramsAdministration, Office of HazardousMaterials Initiatives and Training(DHM-50), Washington, D.C. (1996).,p. G-147]**PEER REVIEWED**

First aid: Move victim to fresh air. Call emergency medical care. Apply artificial respiration if victim isnot breathing. Administer oxygen if breathing is difficult. Remove and isolate contaminated clothing andshoes. Remove material from skin immediately. In case of contact with substance, immediately flushskin or eyes with running water for at least 20 minutes. Keep victim warm and quiet. Ensure that medicalpersonnel are aware of the material(s) involved, and take precautions to protect themselves.[U.S. Department of Transportation. 1996 North American EmergencyResponse Guidebook. A Guidebook for First Responders During theInitial Phase of aHazardous Materials/Dangerous Goods Incident. U.S.Department of Transportation (U.S. DOT) Research and Special ProgramsAdministration, Office of HazardousMaterials Initiatives and Training(DHM-50), Washington, D.C. (1996).,p. G-147]**PEER REVIEWED**



Fire Potential:

COMBUSTIBLE LIQUID. ... SELF-ACCELERATING DECOMP TEMP OF THE 40% DIMETHYLPHTHALATE SOLN, 145 DEG F. ... DANGEROUS WHEN EXPOSED TO HEAT & FLAMES./METHYL ETHYL KETONE PEROXIDE DILUTED WITH 40% DIMETHYL PHTHALATE OROTHER DILUENTS/[National Fire Protection Association. Fire Protection Guide onHazardous Materials. 9th ed. Boston, MA: National Fire ProtectionAssociation, 1986.,p. 49-50]**QC REVIEWED**


Flash Point:

125-200 Deg F (micro open cup) /Methyl ethyl ketone peroxide diluted with 40% dimethyl phthalate orother diluents/[National Fire Protection Association. Fire Protection Guide onHazardous Materials. 9th ed. Boston, MA: National Fire ProtectionAssociation, 1986.,p. 49-50]**QC REVIEWED**



In case of fire, water should be applied by the sprinkler system or by hose from a safe distance,preferably with a fog nozzle. Foam may be necessary instead if the peroxide is diluted in a low densityflammable solvent. Portable extinguishers should not be used except for very small fires. Peroxidesthreatened by fire should be wetted from a safe distance for cooling. /Peroxides, Organic and Inorganic/[International Labour Office. Encyclopaedia of Occupational Health andSafety. 4th edition, Volumes 1-4 1998. Geneva, Switzerland:International Labour Office, 1998.,p. 104.350]**PEER REVIEWED**



... Shock sensitive peroxide precipitates can be formed if contaminated with acetone ... .[International Labour Office. Encyclopedia of Occupational Health andSafety. Vols. I&II. Geneva, Switzerland: International Labour Office,1983. 1611]**PEER REVIEWED**


Vigorous decomp can be stimulated by even trace amt of a wide variety of contaminants, such as strong


acids, bases, metals, metal alloys and salts, sulfur cmpd, amines, accelerators or reducing agents. This isparticularly true of methyl ethyl ketone and benzoyl peroxides, which are intentionally stimulated todecomp @ room temp using small amt of accelerators.[International Labour Office. Encyclopedia of Occupational Health andSafety. Vols. I&II. Geneva, Switzerland: International Labour Office,1983. 1613]**PEER REVIEWED**

Organic materials, heat, flames, sunlight, trace contaminants [Note: A strong oxidizing agent. PureMEKP is shock sensitive. Commercial product is diluted with 40% dimethyl phthalate, cyclohexaneperoxide, or daily phthalate to reduce sensitivity shock].[NIOSH. NIOSH Pocket Guide to Chemical Hazards. DHHS (NIOSH)Publication No. 97-140. Washington, D.C. U.S. Government PrintingOffice, 1997. 208]**PEER REVIEWED**


DECOMP BY HEAT & SUNLIGHT. /METHYL ETHYL KETONE PEROXIDE WITH 40%DIMETHYL PHTHALATE OR OTHER DILUENTS/[National Fire Protection Association. Fire Protection Guide onHazardous Materials. 9th ed. Boston, MA: National Fire ProtectionAssociation, 1986.,p. 49-50]**QC REVIEWED**


PROTECTIVE EQUIPMENT ... COMPRISES SAFETY GOGGLES, APRONS OFNON-INFLAMMABLE MATERIAL OR RUBBER (& NOT PLASTIC, WHICH MAY PRODUCESTATIC ELECTRICITY). RUBBER BOOTS SHOULD BE WORN OVER LEATHER FOOTWEAR.ALL THIS EQUIPMENT SHOULD BE CAREFULLY CLEANED & AIRED AFTER POSSIBLECONTAMINATION. /PEROXIDES/[Lefaux, R. Practical Toxicology of Plastics. Cleveland: CRC PressInc., 1968. 145]**PEER REVIEWED**


Wear appropriate personal protective clothing to prevent skin contact.[NIOSH. NIOSH Pocket Guide to Chemical Hazards. DHHS (NIOSH)Publication No. 97-140. Washington, D.C. U.S. Government PrintingOffice, 1997. 208]**PEER REVIEWED**

Wear appropriate eye protection to prevent eye contact.[NIOSH. NIOSH Pocket Guide to Chemical Hazards. DHHS (NIOSH)Publication No. 97-140. Washington, D.C. U.S. Government PrintingOffice, 1997. 208]**PEER REVIEWED**


Eyewash fountains should be provided in areas where there is any possibility that workers could beexposed to the substance; this is irrespective of the recommendation involving the wearing of eyeprotection.[NIOSH. NIOSH Pocket Guide to Chemical Hazards. DHHS (NIOSH)Publication No. 97-140. Washington, D.C. U.S. Government PrintingOffice, 1997. 208]**PEER REVIEWED**

Facilities for quickly drenching the body should be provided within the immediate work area foremergency use where there is a possibility of exposure. [Note: It is intended that these facilities provide asufficient quantity or flow of water to quickly remove the substance from any body areas likely to beexposed. The actual determination of what constitutes an adequate quick drench facility depends on thespecific circumstances. In certain instances, a deluge shower should be readily available, whereas inothers, the availability of water from a sink or hose could be considered adequate.][NIOSH. NIOSH Pocket Guide to Chemical Hazards. DHHS (NIOSH)Publication No. 97-140. Washington, D.C. U.S. Government PrintingOffice, 1997. 208]**PEER REVIEWED**

Persons handling peroxides should use safety glasses with side shields, goggles or face shield for eyeprotection. Emergency eyewash facilities should be provided. Gloves, aprons and other protectiveclothing as necessary should be used to prevent skin contact. Clothing and equipment that generate staticelectricity should be avoided. Smoking should be prohibited. /Peroxides, Organic and Inorganic/[International Labour Office. Encyclopaedia of Occupational Health andSafety. 4th edition, Volumes 1-4 1998. Geneva, Switzerland:International Labour Office, 1998.,p. 104.350]**PEER REVIEWED**


... ESSENTIAL THAT MFR & STORAGE CONDITIONS BE CAREFULLY CONTROLLED TOAVOID FORMATION OF ... HAZARDOUS PRODUCTS . ... CARE SHOULD BE EXERCISED BYPERSONNEL HANDLING THIS PRODUCT. ... SHOULD NOT BE ALLOWED TO REMAIN INCONTACT WITH SKIN OR EYES, & INHALATION OF VAPORS OR INGESTION SHOULD BEAVOIDED. /METYL ETHYL KETONE PEROXIDE WITH 40% DIMETHYL PHTHALATE OROTHER DILUENTS/[National Fire Protection Association. Fire Protection Guide onHazardous Materials. 9th ed. Boston, MA: National Fire ProtectionAssociation, 1986.,p. 49-50]**PEER REVIEWED**


Contact lenses should not be worn when working with this chemical.[NIOSH. NIOSH Pocket Guide to Chemical Hazards. DHHS (NIOSH)


Publication No. 97-140. Washington, D.C. U.S. Government PrintingOffice, 1997. 208]**PEER REVIEWED**

The worker should immediately wash the skin when it becomes contaminated.[NIOSH. NIOSH Pocket Guide to Chemical Hazards. DHHS (NIOSH)Publication No. 97-140. Washington, D.C. U.S. Government PrintingOffice, 1997. 208]**PEER REVIEWED**

Work clothing that becomes wet or significantly contaminated should be removed and replaced.[NIOSH. NIOSH Pocket Guide to Chemical Hazards. DHHS (NIOSH)Publication No. 97-140. Washington, D.C. U.S. Government PrintingOffice, 1997. 208]**PEER REVIEWED**


UNSTABLE AGENT WHICH LIKE HYDROGEN PEROXIDE RELEASES OXYGEN.[Gosselin, R.E., R.P. Smith, H.C. Hodge. Clinical Toxicology ofCommercial Products. 5th ed. Baltimore: Williams and Wilkins, 1984.,p.II-108]**PEER REVIEWED**





The International Maritime Dangerous Goods Code lays down basic principles for transportinghazardous chemicals. Detailed recommendations for individual substances and a number ofrecommendations for good practice are included in the classes dealing with such substances. A generalindex of technical names has also been compiled. This index should always be consulted whenattempting to locate the appropriate procedures to be used when shipping any substance or article.[IMDG; International Maritime Dangerous Goods Code; InternationalMaritime Organization p.5185,5186,5186-1 (1988)]**PEER REVIEWED**


Storage Conditions:

SHOULD BE STORED IN COOL, VENTILATED, UNHEATED WELL-DETACHED,NONCOMBUSTIBLE BUILDING WITH NONCOMBUSTIBLE FLOORS. ISOLATE FROM OTHERSTORED MATERIALS, PARTICULARLY ACCELERATORS, READILY OXIDIZABLE,ORGANIC OR FLAMMABLE MATERIALS. PROHIBIT POSSIBLE SOURCES OF IGNITION,INCL ELECTRICAL INSTALLATIONS ... LARGE-QUANTITY STORAGE SHOULD BEPROTECTED BY AUTOMATIC DELUGE SPRINKLER SYSTEM. PROTECT CONTAINERSAGAINST PHYSICAL DAMAGE. /METHYL ETHYL KETONE PEROXIDE DILUTED WITH40% DIMETHYL PHTHALATE OR OTHER DILUENTS/[National Fire Protection Association. Fire Protection Guide onHazardous Materials. 9th ed. Boston, MA: National Fire ProtectionAssociation, 1986.,p. 49-50]**QC REVIEWED**

Cleanup Methods:


Spills should be cleaned up promptly using non-sparking tools and an inert, moist diluent such asvermiculite or sand. Sweepings may be placed in open containers or polyethylene bags and the areawashed with water and detergent. Spilled, contaminated, waste or questionable peroxides should bedestroyed. /Peroxides, Organic and Inorganic/[International Labour Office. Encyclopaedia of Occupational Health andSafety. 4th edition, Volumes 1-4 1998. Geneva, Switzerland:International Labour Office, 1998.,p. 104.350]**PEER REVIEWED**

Most peroxides can be hydrolyzed by adding them slowly with stirring to about ten times their weight ofcold 10% sodium hydroxide solution. The reaction may require several hours. /Peroxides, Organic andInorganic/[International Labour Office. Encyclopaedia of Occupational Health andSafety. 4th edition, Volumes 1-4 1998. Geneva, Switzerland:International Labour Office, 1998.,p. 104.350]**PEER REVIEWED**

Dilute and drain into the sewer with abundant water. /Hydrogen peroxide/[ITII. Toxic and Hazardous Industrial Chemicals Safety Manual. Tokyo,Japan: The International Technical Information Institute, 1988.


278]**PEER REVIEWED**

Disposal Methods:


A good candidate for liquid injection incineration at a temperature range of 650 to 1,600 deg C and aresidence time of 0.1 to 2 seconds. A good candidate for rotary kiln incineration at a temperature range of820 to 1,600 deg C and residence times of seconds for liquids and gases, and hours for solids. A goodcandidate for fluidized bed incineration at a temperature range of 450 to 980 deg C and residence timesof seconds for liquids and gases, and longer for solids.[USEPA; Engineering Handbook for Hazardous Waste Incineration p. 3-14(1981) EPA 68-03-3025]**PEER REVIEWED**



Hazards Summary:

The major hazards encountered in the use and handling of 2-butanone peroxide stem from itstoxicologic properties and explosivity. Toxic by all routes (ie, inhalation, ingestion, dermal absorption),exposure to this colorless liquid may occur from its production or use as a curing agent for plastics andpolyester resins, and as an initiator in the manufacture of polymers. Effects from exposure may includecontact burns to the skin and eyes, hemolytic anemia, shortness-of-breath, or pulmonary edema. OSHAhas established a Ceiling limit of 0.7 ppm as a final rule to become effective December 31, 1992. Inactivities and situations where over-exposure may occur, wear a self-contained breathing apparatus andpersonal protective clothing. If contact should occur, irrigate exposed eyes with copious amounts ofwater for at least 30 minutes, and exposed skin for at least 15 minutes. Contaminated clothing and shoesshould be removed at the site. 2-Butanone peroxide may be ignited by heat, sparks, or flames; burningrapidly and producing poisonous gases. Containers of this substance may explode from friction, heat,mechanical shock, or contamination (such as from trace amounts of strong acids, bases, metals, metalalloys, salts, sulfur compounds, amines, accelerators, or reducing agents). For fires involving thissubstance, extinguish with dry chemical, CO2, regular foam, or water (used in flooding quantities forlarge fires). Fight fire from as far a distance as possible, in an explosion-resistant location. Isolate thearea for 1/2 mile in all directions if a tank, rail car, or tank truck is involved. 2-Butanone peroxideshould be stored in cool, ventilated areas, away from sunlight, sources of ignition, physical damage,shock, and organic or flammable materials. Smalls spills of this substance should be taken up with anoncombustible absorbent such as vermiculite and placed in a plastic container for immediate disposal.Wet down large spills with water and dike for later disposal. This substance is a good candidate for liquidinjection, rotary kiln, or fluidized bed forms of incineration.**PEER REVIEWED**

http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:2:hazs [21/04/2001 9:21:31 AM]



Fire or explosion: May explode from heat or contamination. May ignite combustibles (wood, paper, oil,clothing, etc.). May be ignited by heat, sparks or flames. May burn rapidly with flare-burning effect.Containers may explode when heated. Runoff may create fire or explosion hazard.[U.S. Department of Transportation. 1996 North American EmergencyResponse Guidebook. A Guidebook for First Responders During theInitial Phase of aHazardous Materials/Dangerous Goods Incident. U.S.Department of Transportation (U.S. DOT) Research and Special ProgramsAdministration, Office of HazardousMaterials Initiatives and Training(DHM-50), Washington, D.C. (1996).,p. G-147]**PEER REVIEWED**

Health: TOXIC; inhalation, ingestion or contact (skin, eyes) with vapors, dusts or substance may causesevere injury, burns, or death. Contact of vapor or substance with eyes may cause blindness withinminutes. Fire may produce irritating, corrosive and/or toxic gases. Toxic fumes or dust may accumulatein confined areas (basement, tanks, hopper/tank cars, etc.). Runoff from fire control or dilution watermay cause pollution.[U.S. Department of Transportation. 1996 North American EmergencyResponse Guidebook. A Guidebook for First Responders During theInitial Phase of aHazardous Materials/Dangerous Goods Incident. U.S.Department of Transportation (U.S. DOT) Research and Special ProgramsAdministration, Office of HazardousMaterials Initiatives and Training(DHM-50), Washington, D.C. (1996).,p. G-147]**PEER REVIEWED**

Public safety: CALL Emergency Response Telephone Number. ... Isolate spill or leak area immediatelyfor at least 25 to 50 meters (80 to 160 feet) in all directions. Keep unauthorized personnel away. Stayupwind. Keep out of low areas.[U.S. Department of Transportation. 1996 North American EmergencyResponse Guidebook. A Guidebook for First Responders During theInitial Phase of aHazardous Materials/Dangerous Goods Incident. U.S.Department of Transportation (U.S. DOT) Research and Special ProgramsAdministration, Office of HazardousMaterials Initiatives and Training(DHM-50), Washington, D.C. (1996).,p. G-147]**PEER REVIEWED**

Protective clothing: Wear positive pressure self-contained breathing apparatus (SCBA). Wear chemicalprotective clothing which is specifically recommended by the manufacturer. Structural firefighters'protective clothing is recommended for fire situations ONLY; it is not effective in spill situations.[U.S. Department of Transportation. 1996 North American EmergencyResponse Guidebook. A Guidebook for First Responders During theInitial Phase of aHazardous Materials/Dangerous Goods Incident. U.S.Department of Transportation (U.S. DOT) Research and Special ProgramsAdministration, Office of HazardousMaterials Initiatives and Training(DHM-50), Washington, D.C. (1996).,p. G-147]**PEER REVIEWED**


Evacuation: Large spill: Consider initial evacuation for at least 250 meters (800 feet). Fire: If tank, railcar or tank truck is involved in a fire, ISOLATE for 800 meters (1/2 mile) in all directions; also, considerinitial evacuation for 800 meters (1/2 mile) in all directions.[U.S. Department of Transportation. 1996 North American EmergencyResponse Guidebook. A Guidebook for First Responders During theInitial Phase of aHazardous Materials/Dangerous Goods Incident. U.S.Department of Transportation (U.S. DOT) Research and Special ProgramsAdministration, Office of HazardousMaterials Initiatives and Training(DHM-50), Washington, D.C. (1996).,p. G-147]**PEER REVIEWED**

Fire: Small fires: Dry chemical, CO2, water spray or regular foam. Large fires: Flood fire area with waterfrom a distance. Do not use straight streams. Move containers from fire area if you can do it without risk.Do not move cargo or vehicle if cargo has been exposed to heat. Fight fire from maximum distance oruse unmanned hose holders or monitor nozzles. Cool containers with flooding quantities of water untilwell after fire is out. ALWAYS stay away from the ends of tanks. For massive fire, use unmanned hoseholders or monitor nozzles; if this is impossible, withdraw from area and let fire burn.[U.S. Department of Transportation. 1996 North American EmergencyResponse Guidebook. A Guidebook for First Responders During theInitial Phase of aHazardous Materials/Dangerous Goods Incident. U.S.Department of Transportation (U.S. DOT) Research and Special ProgramsAdministration, Office of HazardousMaterials Initiatives and Training(DHM-50), Washington, D.C. (1996).,p. G-147]**PEER REVIEWED**

Spill or leak: ELIMINATE all ignition sources (no smoking, flares, sparks or flames in immediate area).Keep combustibles (wood, paper, oil, etc.) away from spilled material. Do not touch damaged containersor spilled material unless wearing appropriate protective clothing. Keep substance wet using water spray.Stop leak if you can do it without risk. Small spills: Take up with inert, damp, noncombustible materialusing clean non-sparking tools and place into loosely covered plastic containers for later disposal. Largespills: Wet down with water and dike for later disposal. Prevent entry into waterways, sewers, basementsor confined areas. DO NOT CLEAN-UP OR DISPOSE OF, EXCEPT UNDER SUPERVISION OF ASPECIALIST.[U.S. Department of Transportation. 1996 North American EmergencyResponse Guidebook. A Guidebook for First Responders During theInitial Phase of aHazardous Materials/Dangerous Goods Incident. U.S.Department of Transportation (U.S. DOT) Research and Special ProgramsAdministration, Office of HazardousMaterials Initiatives and Training(DHM-50), Washington, D.C. (1996).,p. G-147]**PEER REVIEWED**

First aid: Move victim to fresh air. Call emergency medical care. Apply artificial respiration if victim isnot breathing. Administer oxygen if breathing is difficult. Remove and isolate contaminated clothing andshoes. Remove material from skin immediately. In case of contact with substance, immediately flushskin or eyes with running water for at least 20 minutes. Keep victim warm and quiet. Ensure that medicalpersonnel are aware of the material(s) involved, and take precautions to protect themselves.[U.S. Department of Transportation. 1996 North American EmergencyResponse Guidebook. A Guidebook for First Responders During theInitial Phase of aHazardous Materials/Dangerous Goods Incident. U.S.Department of Transportation (U.S. DOT) Research and Special Programs


Administration, Office of HazardousMaterials Initiatives and Training(DHM-50), Washington, D.C. (1996).,p. G-147]**PEER REVIEWED**





In case of fire, water should be applied by the sprinkler system or by hose from a safe distance,preferably with a fog nozzle. Foam may be necessary instead if the peroxide is diluted in a low densityflammable solvent. Portable extinguishers should not be used except for very small fires. Peroxidesthreatened by fire should be wetted from a safe distance for cooling. /Peroxides, Organic and Inorganic/[International Labour Office. Encyclopaedia of Occupational Health andSafety. 4th edition, Volumes 1-4 1998. Geneva, Switzerland:International Labour Office, 1998.,p. 104.350]**PEER REVIEWED**

http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:2:firp [21/04/2001 9:21:38 AM]




... Shock sensitive peroxide precipitates can be formed if contaminated with acetone ... .[International Labour Office. Encyclopedia of Occupational Health andSafety. Vols. I&II. Geneva, Switzerland: International Labour Office,1983. 1611]**PEER REVIEWED**

http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:2:expl [21/04/2001 9:21:39 AM]



Vigorous decomp can be stimulated by even trace amt of a wide variety of contaminants, such as strongacids, bases, metals, metal alloys and salts, sulfur cmpd, amines, accelerators or reducing agents. This isparticularly true of methyl ethyl ketone and benzoyl peroxides, which are intentionally stimulated todecomp @ room temp using small amt of accelerators.[International Labour Office. Encyclopedia of Occupational Health andSafety. Vols. I&II. Geneva, Switzerland: International Labour Office,1983. 1613]**PEER REVIEWED**

Organic materials, heat, flames, sunlight, trace contaminants [Note: A strong oxidizing agent. PureMEKP is shock sensitive. Commercial product is diluted with 40% dimethyl phthalate, cyclohexaneperoxide, or daily phthalate to reduce sensitivity shock].[NIOSH. NIOSH Pocket Guide to Chemical Hazards. DHHS (NIOSH)Publication No. 97-140. Washington, D.C. U.S. Government PrintingOffice, 1997. 208]**PEER REVIEWED**

http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:2:reac [21/04/2001 9:21:40 AM]



PROTECTIVE EQUIPMENT ... COMPRISES SAFETY GOGGLES, APRONS OFNON-INFLAMMABLE MATERIAL OR RUBBER (& NOT PLASTIC, WHICH MAY PRODUCESTATIC ELECTRICITY). RUBBER BOOTS SHOULD BE WORN OVER LEATHER FOOTWEAR.ALL THIS EQUIPMENT SHOULD BE CAREFULLY CLEANED & AIRED AFTER POSSIBLECONTAMINATION. /PEROXIDES/[Lefaux, R. Practical Toxicology of Plastics. Cleveland: CRC PressInc., 1968. 145]**PEER REVIEWED**


Wear appropriate personal protective clothing to prevent skin contact.[NIOSH. NIOSH Pocket Guide to Chemical Hazards. DHHS (NIOSH)Publication No. 97-140. Washington, D.C. U.S. Government PrintingOffice, 1997. 208]**PEER REVIEWED**

Wear appropriate eye protection to prevent eye contact.[NIOSH. NIOSH Pocket Guide to Chemical Hazards. DHHS (NIOSH)Publication No. 97-140. Washington, D.C. U.S. Government PrintingOffice, 1997. 208]**PEER REVIEWED**

Eyewash fountains should be provided in areas where there is any possibility that workers could beexposed to the substance; this is irrespective of the recommendation involving the wearing of eyeprotection.[NIOSH. NIOSH Pocket Guide to Chemical Hazards. DHHS (NIOSH)Publication No. 97-140. Washington, D.C. U.S. Government PrintingOffice, 1997. 208]**PEER REVIEWED**

Facilities for quickly drenching the body should be provided within the immediate work area foremergency use where there is a possibility of exposure. [Note: It is intended that these facilities provide asufficient quantity or flow of water to quickly remove the substance from any body areas likely to beexposed. The actual determination of what constitutes an adequate quick drench facility depends on thespecific circumstances. In certain instances, a deluge shower should be readily available, whereas inothers, the availability of water from a sink or hose could be considered adequate.][NIOSH. NIOSH Pocket Guide to Chemical Hazards. DHHS (NIOSH)Publication No. 97-140. Washington, D.C. U.S. Government PrintingOffice, 1997. 208]**PEER REVIEWED**


Persons handling peroxides should use safety glasses with side shields, goggles or face shield for eyeprotection. Emergency eyewash facilities should be provided. Gloves, aprons and other protectiveclothing as necessary should be used to prevent skin contact. Clothing and equipment that generate staticelectricity should be avoided. Smoking should be prohibited. /Peroxides, Organic and Inorganic/[International Labour Office. Encyclopaedia of Occupational Health andSafety. 4th edition, Volumes 1-4 1998. Geneva, Switzerland:International Labour Office, 1998.,p. 104.350]**PEER REVIEWED**




... ESSENTIAL THAT MFR & STORAGE CONDITIONS BE CAREFULLY CONTROLLED TOAVOID FORMATION OF ... HAZARDOUS PRODUCTS . ... CARE SHOULD BE EXERCISED BYPERSONNEL HANDLING THIS PRODUCT. ... SHOULD NOT BE ALLOWED TO REMAIN INCONTACT WITH SKIN OR EYES, & INHALATION OF VAPORS OR INGESTION SHOULD BEAVOIDED. /METYL ETHYL KETONE PEROXIDE WITH 40% DIMETHYL PHTHALATE OROTHER DILUENTS/[National Fire Protection Association. Fire Protection Guide onHazardous Materials. 9th ed. Boston, MA: National Fire ProtectionAssociation, 1986.,p. 49-50]**PEER REVIEWED**


Contact lenses should not be worn when working with this chemical.[NIOSH. NIOSH Pocket Guide to Chemical Hazards. DHHS (NIOSH)Publication No. 97-140. Washington, D.C. U.S. Government PrintingOffice, 1997. 208]**PEER REVIEWED**

The worker should immediately wash the skin when it becomes contaminated.[NIOSH. NIOSH Pocket Guide to Chemical Hazards. DHHS (NIOSH)Publication No. 97-140. Washington, D.C. U.S. Government PrintingOffice, 1997. 208]**PEER REVIEWED**

Work clothing that becomes wet or significantly contaminated should be removed and replaced.[NIOSH. NIOSH Pocket Guide to Chemical Hazards. DHHS (NIOSH)Publication No. 97-140. Washington, D.C. U.S. Government PrintingOffice, 1997. 208]**PEER REVIEWED**

http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:2:oprm [21/04/2001 9:21:45 AM]



UNSTABLE AGENT WHICH LIKE HYDROGEN PEROXIDE RELEASES OXYGEN.[Gosselin, R.E., R.P. Smith, H.C. Hodge. Clinical Toxicology ofCommercial Products. 5th ed. Baltimore: Williams and Wilkins, 1984.,p.II-108]**PEER REVIEWED**


http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:2:ssl [21/04/2001 9:21:46 AM]





The International Maritime Dangerous Goods Code lays down basic principles for transportinghazardous chemicals. Detailed recommendations for individual substances and a number ofrecommendations for good practice are included in the classes dealing with such substances. A generalindex of technical names has also been compiled. This index should always be consulted whenattempting to locate the appropriate procedures to be used when shipping any substance or article.[IMDG; International Maritime Dangerous Goods Code; InternationalMaritime Organization p.5185,5186,5186-1 (1988)]**PEER REVIEWED**

http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:2:ship [21/04/2001 9:21:48 AM]


Cleanup Methods:


Spills should be cleaned up promptly using non-sparking tools and an inert, moist diluent such asvermiculite or sand. Sweepings may be placed in open containers or polyethylene bags and the areawashed with water and detergent. Spilled, contaminated, waste or questionable peroxides should bedestroyed. /Peroxides, Organic and Inorganic/[International Labour Office. Encyclopaedia of Occupational Health andSafety. 4th edition, Volumes 1-4 1998. Geneva, Switzerland:International Labour Office, 1998.,p. 104.350]**PEER REVIEWED**

Most peroxides can be hydrolyzed by adding them slowly with stirring to about ten times their weight ofcold 10% sodium hydroxide solution. The reaction may require several hours. /Peroxides, Organic andInorganic/[International Labour Office. Encyclopaedia of Occupational Health andSafety. 4th edition, Volumes 1-4 1998. Geneva, Switzerland:International Labour Office, 1998.,p. 104.350]**PEER REVIEWED**

Dilute and drain into the sewer with abundant water. /Hydrogen peroxide/[ITII. Toxic and Hazardous Industrial Chemicals Safety Manual. Tokyo,Japan: The International Technical Information Institute, 1988.278]**PEER REVIEWED**

http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:2:clup [21/04/2001 9:21:51 AM]


Disposal Methods:


A good candidate for liquid injection incineration at a temperature range of 650 to 1,600 deg C and aresidence time of 0.1 to 2 seconds. A good candidate for rotary kiln incineration at a temperature range of820 to 1,600 deg C and residence times of seconds for liquids and gases, and hours for solids. A goodcandidate for fluidized bed incineration at a temperature range of 450 to 980 deg C and residence timesof seconds for liquids and gases, and longer for solids.[USEPA; Engineering Handbook for Hazardous Waste Incineration p. 3-14(1981) EPA 68-03-3025]**PEER REVIEWED**

http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:2:disp [21/04/2001 9:21:52 AM]



OSHA Standards:

Vacated 1989 OSHA PEL Ceiling limit 0.7 ppm (5 mg/cu m) is still enforced in some states.[NIOSH. NIOSH Pocket Guide to Chemical Hazards. DHHS (NIOSH)Publication No. 97-140. Washington, D.C. U.S. Government PrintingOffice, 1997. 368]**PEER REVIEWED**


Ceiling limit 0.2 ppm[American Conference of Governmental Industrial Hygienists. TLVs andBEIs. Threshold Limit Values for Chemical Substances and PhysicalAgents and Biological Exposure Indices. Cincinnati, OH. 2000.49]**PEER REVIEWED**


Recommended Exposure Limit: Ceiling Value: 0.2 ppm (1.5 mg/cu m).[NIOSH. NIOSH Pocket Guide to Chemical Hazards. DHHS (NIOSH)Publication No. 97-140. Washington, D.C. U.S. Government PrintingOffice, 1997. 208]**PEER REVIEWED**

http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:2:oest [21/04/2001 9:21:54 AM]


OSHA Standards:

Vacated 1989 OSHA PEL Ceiling limit 0.7 ppm (5 mg/cu m) is still enforced in some states.[NIOSH. NIOSH Pocket Guide to Chemical Hazards. DHHS (NIOSH)Publication No. 97-140. Washington, D.C. U.S. Government PrintingOffice, 1997. 368]**PEER REVIEWED**

http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:2:osha [21/04/2001 9:21:55 AM]



Ceiling limit 0.2 ppm[American Conference of Governmental Industrial Hygienists. TLVs andBEIs. Threshold Limit Values for Chemical Substances and PhysicalAgents and Biological Exposure Indices. Cincinnati, OH. 2000.49]**PEER REVIEWED**

http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:2:tlv [21/04/2001 9:22:03 AM]



Recommended Exposure Limit: Ceiling Value: 0.2 ppm (1.5 mg/cu m).[NIOSH. NIOSH Pocket Guide to Chemical Hazards. DHHS (NIOSH)Publication No. 97-140. Washington, D.C. U.S. Government PrintingOffice, 1997. 208]**PEER REVIEWED**

http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:2:nrec [21/04/2001 9:22:04 AM]



Major Uses:

Manufacture of acrylic resins; hardening agent for fiberglass-reinforced plastics.[Lewis, R.J., Sr (Ed.). Hawley's Condensed Chemical Dictionary. 13thed. New York, NY: John Wiley & Sons, Inc. 1997. 737]**PEER REVIEWED**

MEDICATION**PEER REVIEWED**

Unsaturated polyester resin crosslinking agent[Ashford, R.D. Ashford's Dictionary of Industrial Chemicals. London,England: Wavelength Publications Ltd., 1994. 583]**PEER REVIEWED**

Used as a curing agent with polyester resins for adhesives, plastics, lacquers, and fiber glass resin kits forboat and automobile body repair.[Clayton, G.D., F.E. Clayton (eds.) Patty's Industrial Hygiene andToxicology. Volumes 2A, 2B, 2C, 2D, 2E, 2F: Toxicology. 4th ed. NewYork, NY: John Wiley & Sons Inc., 1993-1994. 562]**PEER REVIEWED**

Manufacturers:

Akzo America, Inc., Akzo Chemicals, Inc., 300 South Riverside Plaza, Suite 200, Chicago, IL 60606(312) 906-7500; Production site: Burt, NY 14028[SRI. 1999 Directory of Chemical Producers - United States. MenloPark, CA. SRI Consulting 1999. 745]**PEER REVIEWED**

Elf Atochem North America, Inc., 2000 Market Street, 21st Floor, Philadelphia, PA 19103-3222,215-419-7000; Production site: Geneseo, NY 14454[SRI. 1999 Directory of Chemical Producers - United States. MenloPark, CA. SRI Consulting 1999. 475]**PEER REVIEWED**

The Norac Co., Hq, 405 South Motor Ave., P.O. Box 577, Azusa, CA 91702 (626) 334-2908; Productionsite: Azusa, CA 91702; West Helena, AR 72390[SRI. 1999 Directory of Chemical Producers - United States. MenloPark, CA. SRI Consulting 1999. 745]**PEER REVIEWED**

Witco, Corp., One American Lane, Greenwich, CT 06831-2559 (203) 552-2000; Production site: Route69, Marshall, TX 75670[SRI. 1999 Directory of Chemical Producers - United States. MenloPark, CA. SRI Consulting 1999. 745]**PEER REVIEWED**


Reaction of methyl ethyl ketone with hydrogen peroxide (peroxidation)


[Ashford, R.D. Ashford's Dictionary of Industrial Chemicals. London,England: Wavelength Publications Ltd., 1994. 583]**PEER REVIEWED**


AVAIL AS 60% SOLN IN DIMETHYL PHTHALATE (LUPERSOL DDM) TO SERVE ASCATALYST FOR POLYMERIZING PLASTICS.[Gosselin, R.E., R.P. Smith, H.C. Hodge. Clinical Toxicology ofCommercial Products. 5th ed. Baltimore: Williams and Wilkins, 1984.,p.II-107]**PEER REVIEWED**


Lupersol Delta-X /is/ ketone peroxide in dimethyl phthalate diluent; Lupersol DNF /is/ ketone peroxidein proprietary diluent.[Ash, M. and I. Ash. Encyclopedia of Industrial Chemical Additives.Vols 1, II, III. New York, NY: Chemical Publishing Co., Inc.,1984-1985.,p. V1 386]**PEER REVIEWED**

Diluents may be any combination of dimethyl phthalate, cyclohexanone peroxide, or diallylphthalate.These diluents provide a stable mixt which under ordinary handling cannot be detonated at room temp.[American Conference of Governmental Industrial Hygienists.Documentation of the Threshold Limit Values and Biological ExposureIndices. 5th ed. Cincinnati, OH:American Conference of GovernmentalIndustrial Hygienists, 1986. 396]**PEER REVIEWED**

Liquid comprising 5-11% active oxygen content in dimethyl phthalate[Ashford, R.D. Ashford's Dictionary of Industrial Chemicals. London,England: Wavelength Publications Ltd., 1994. 583]**PEER REVIEWED**

Mixed product consisting of dimers (50%), trimers (25%), and monomeric peroxy compounds[Ashford, R.D. Ashford's Dictionary of Industrial Chemicals. London,England: Wavelength Publications Ltd., 1994. 583]**PEER REVIEWED**


CURING AGENT FOR UNSATURATED POLYESTER RESINS, 94%; OTHER USES, 6% (1980).[SRI]**PEER REVIEWED**

U. S. Production:


(1982) 2.68X10+9 G


[SRI]**PEER REVIEWED**

(1985) 4.43X10+8 g.[USITC. SYN ORG CHEM-U.S. PROD/SALES 1985 p.268]**PEER REVIEWED**

(1992) 4,520,000 kg[United States International Trade Commission; Synthetic OrganicChemicals--United States Production and Sales, 1992. USITC.Publication 2720, February 1992. Washington, DC: United States TradeCommission, p. 3-54 (1992)]**PEER REVIEWED**

(1993) 5,107,000 kg[United States International Trade Commission. Synthetic OrganicChemicals - United States Production and Sales, 1993. USITCPublication 2810, Nov. 1994. Washington, D.C.,p. 3-54]**PEERREVIEWED**

U. S. Imports:

(1977) AT LEAST 4.54X10+5 G[SRI]**PEER REVIEWED**



Major Uses:

Manufacture of acrylic resins; hardening agent for fiberglass-reinforced plastics.[Lewis, R.J., Sr (Ed.). Hawley's Condensed Chemical Dictionary. 13thed. New York, NY: John Wiley & Sons, Inc. 1997. 737]**PEER REVIEWED**

MEDICATION**PEER REVIEWED**

Unsaturated polyester resin crosslinking agent[Ashford, R.D. Ashford's Dictionary of Industrial Chemicals. London,England: Wavelength Publications Ltd., 1994. 583]**PEER REVIEWED**

Used as a curing agent with polyester resins for adhesives, plastics, lacquers, and fiber glass resin kits forboat and automobile body repair.[Clayton, G.D., F.E. Clayton (eds.) Patty's Industrial Hygiene andToxicology. Volumes 2A, 2B, 2C, 2D, 2E, 2F: Toxicology. 4th ed. NewYork, NY: John Wiley & Sons Inc., 1993-1994. 562]**PEER REVIEWED**

http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:2:use [21/04/2001 9:22:08 AM]


Manufacturers:

Akzo America, Inc., Akzo Chemicals, Inc., 300 South Riverside Plaza, Suite 200, Chicago, IL 60606(312) 906-7500; Production site: Burt, NY 14028[SRI. 1999 Directory of Chemical Producers - United States. MenloPark, CA. SRI Consulting 1999. 745]**PEER REVIEWED**

Elf Atochem North America, Inc., 2000 Market Street, 21st Floor, Philadelphia, PA 19103-3222,215-419-7000; Production site: Geneseo, NY 14454[SRI. 1999 Directory of Chemical Producers - United States. MenloPark, CA. SRI Consulting 1999. 475]**PEER REVIEWED**

The Norac Co., Hq, 405 South Motor Ave., P.O. Box 577, Azusa, CA 91702 (626) 334-2908; Productionsite: Azusa, CA 91702; West Helena, AR 72390[SRI. 1999 Directory of Chemical Producers - United States. MenloPark, CA. SRI Consulting 1999. 745]**PEER REVIEWED**

Witco, Corp., One American Lane, Greenwich, CT 06831-2559 (203) 552-2000; Production site: Route69, Marshall, TX 75670[SRI. 1999 Directory of Chemical Producers - United States. MenloPark, CA. SRI Consulting 1999. 745]**PEER REVIEWED**

http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:2:mfs [21/04/2001 9:22:09 AM]









http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:2:form [21/04/2001 9:22:12 AM]



CURING AGENT FOR UNSATURATED POLYESTER RESINS, 94%; OTHER USES, 6% (1980).[SRI]**PEER REVIEWED**

http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:2:cpat [21/04/2001 9:22:13 AM]


U. S. Production:



(1985) 4.43X10+8 g.[USITC. SYN ORG CHEM-U.S. PROD/SALES 1985 p.268]**PEER REVIEWED**

(1992) 4,520,000 kg[United States International Trade Commission; Synthetic OrganicChemicals--United States Production and Sales, 1992. USITC.Publication 2720, February 1992. Washington, DC: United States TradeCommission, p. 3-54 (1992)]**PEER REVIEWED**

(1993) 5,107,000 kg[United States International Trade Commission. Synthetic OrganicChemicals - United States Production and Sales, 1993. USITCPublication 2810, Nov. 1994. Washington, D.C.,p. 3-54]**PEERREVIEWED**

http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:2:prod [21/04/2001 9:22:14 AM]


U. S. Imports:

(1977) AT LEAST 4.54X10+5 G[SRI]**PEER REVIEWED**

http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:2:impt [21/04/2001 9:22:16 AM]


Laboratory Methods:


NIOSH Method 3508. Determination of Methyl Ethyl Ketone Peroxide by Visible AbsorptionSpectrophotometry.[U.S. Department of Health and Human Services, Public Health Service,Centers for Disease Control, National Institute for OccupationalSafety and Health. NIOSH Manual of Analytical Methods. 4th ed.MethodsA-Z & Supplements. Washington, DC: U.S. Government Printing Office,Aug 1994.]**PEER REVIEWED**

http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:2:labm [21/04/2001 9:22:19 AM]


Special References:

Special Reports:

Anon; Scientific Basis for Swedish Occupational Standards. VI, Arbetarskyddsstyrelsen,Publikationsservice, 171 84 Solna, Sweden, 133p (1985). ... Compilation of consensus reports on thephysical, chemical and toxicological properties and methods of determination of potentially hazardoussubstances.


http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:2:sref [21/04/2001 9:22:21 AM]


Special Reports:

Anon; Scientific Basis for Swedish Occupational Standards. VI, Arbetarskyddsstyrelsen,Publikationsservice, 171 84 Solna, Sweden, 133p (1985). ... Compilation of consensus reports on thephysical, chemical and toxicological properties and methods of determination of potentially hazardoussubstances.


http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:2:rpts [21/04/2001 9:22:22 AM]



Synonyms:

2-BUTANONE, PEROXIDE**PEER REVIEWED**

BUTANOX M 50**PEER REVIEWED**


BUTANOX LPT**PEER REVIEWED**

CHALOXYD MEKP-HA 1**PEER REVIEWED**

CHALOXYD MEKP-LA 1**PEER REVIEWED**

ETHYL METHYL KETONE PEROXIDE**PEER REVIEWED**

FR 222**PEER REVIEWED**

HI-POINT 180**PEER REVIEWED**

KAYAMEK A**PEER REVIEWED**

KETONOX**PEER REVIEWED**

Lupersol Delta-X**PEER REVIEWED**

Lupersol DDM**PEER REVIEWED**

Lupersol DEL**PEER REVIEWED**

MEK PEROXIDE


**PEER REVIEWED**


NCI-C55447**PEER REVIEWED**

PERMEK N**PEER REVIEWED**

TRIGONOX M 50**PEER REVIEWED**










UN 2550; Ethyl methyl ketone peroxide(s) max concn 45% or in soln with not more than 9% by wtactive oxygen.

UN 3068; Methyl ethyl ketone peroxide(s), not more than 40% in diisobutyl nylonate, with not morethan 8.2% available oxygen.

UN 2563; Methyl ethyl ketone peroxide(s), 52% or less in solution, not more than 10% availableoxygen.

IMO 5.2; Methyl ethyl ketone peroxide(s), 52% or less in solution, more than 10% available oxygen.

UN 2127; Methyl ethyl ketone peroxide(s), maximum concentration 60%


49 191 78; Methyl ethyl ketone peroxide (in solution with not more than 9% by weight active oxygen)


U160; A toxic waste when a discarded commercial chemical product or manufacturing chemicalintermediate or an off-specification commercial chemical product or manufacturing chemicalintermediate.

RTECS Number:

NIOSH/EL9450000



Synonyms:

2-BUTANONE, PEROXIDE**PEER REVIEWED**



BUTANOX LPT**PEER REVIEWED**

CHALOXYD MEKP-HA 1**PEER REVIEWED**

CHALOXYD MEKP-LA 1**PEER REVIEWED**

ETHYL METHYL KETONE PEROXIDE**PEER REVIEWED**

FR 222**PEER REVIEWED**

HI-POINT 180**PEER REVIEWED**

KAYAMEK A**PEER REVIEWED**

KETONOX**PEER REVIEWED**

Lupersol Delta-X**PEER REVIEWED**

Lupersol DDM**PEER REVIEWED**

Lupersol DEL**PEER REVIEWED**

MEK PEROXIDE**PEER REVIEWED**

METHYL ETHYL KETONE PEROXIDE


**PEER REVIEWED**

NCI-C55447**PEER REVIEWED**

PERMEK N**PEER REVIEWED**

TRIGONOX M 50**PEER REVIEWED**




UN 2550; Ethyl methyl ketone peroxide(s) max concn 45% or in soln with not more than 9% by wtactive oxygen.

UN 3068; Methyl ethyl ketone peroxide(s), not more than 40% in diisobutyl nylonate, with not morethan 8.2% available oxygen.

UN 2563; Methyl ethyl ketone peroxide(s), 52% or less in solution, not more than 10% availableoxygen.

IMO 5.2; Methyl ethyl ketone peroxide(s), 52% or less in solution, more than 10% available oxygen.

UN 2127; Methyl ethyl ketone peroxide(s), maximum concentration 60%

http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:2:shpn [21/04/2001 9:22:27 AM]



49 191 78; Methyl ethyl ketone peroxide (in solution with not more than 9% by weight active oxygen)

http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:2:stcc [21/04/2001 9:22:28 AM]



U160; A toxic waste when a discarded commercial chemical product or manufacturing chemicalintermediate or an off-specification commercial chemical product or manufacturing chemicalintermediate.

http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:2:hazn [21/04/2001 9:22:29 AM]


RTECS Number:

NIOSH/EL9450000

http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:2:rtec [21/04/2001 9:22:31 AM]






Update History:

Complete Update on 01/24/2001, 45 fields added/edited/deleted.Complete Update on 09/21/1999, 1 field added/edited/deleted.Complete Update on 08/24/1999, 6 fields added/edited/deleted.Complete Update on 01/27/1999, 1 field added/edited/deleted.Complete Update on 11/17/1998, 1 field added/edited/deleted.Complete Update on 03/08/1998, 1 field added/edited/deleted.Complete Update on 10/31/1997, 1 field added/edited/deleted.Complete Update on 04/24/1997, 2 fields added/edited/deleted.Complete Update on 03/18/1997, 1 field added/edited/deleted.Complete Update on 02/28/1997, 1 field added/edited/deleted.Complete Update on 10/18/1996, 1 field added/edited/deleted.Complete Update on 09/04/1996, 6 fields added/edited/deleted.Complete Update on 06/06/1996, 1 field added/edited/deleted.Complete Update on 01/27/1996, 1 field added/edited/deleted.Complete Update on 01/23/1995, 1 field added/edited/deleted.Complete Update on 12/30/1994, 1 field added/edited/deleted.Complete Update on 09/01/1994, 2 fields added/edited/deleted.Field Update on 07/28/1994, 1 field added/edited/deleted.Field Update on 11/01/1993, 1 field added/edited/deleted.Complete Update on 04/19/1993, 2 fields added/edited/deleted.Complete Update on 02/28/1993, 6 fields added/edited/deleted.Field update on 01/01/1993, 1 field added/edited/deleted.Field Update on 11/06/1992, 1 field added/edited/deleted.Field Update on 11/05/1992, 1 field added/edited/deleted.Field Update on 11/04/1992, 1 field added/edited/deleted.Field Update on 09/04/1992, 1 field added/edited/deleted.Field Update on 09/04/1992, 1 field added/edited/deleted.Complete Update on 01/28/1992, 1 field added/edited/deleted.Complete Update on 09/26/1991, 1 field added/edited/deleted.Complete Update on 09/10/1991, 60 fields added/edited/deleted.Field Update on 01/15/1990, 1 field added/edited/deleted.Complete Update on 01/11/1990, 10 fields added/edited/deleted.Complete Update on 04/30/1986






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http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:2:date [21/04/2001 9:22:34 AM]



http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:2:rvdt [21/04/2001 9:22:35 AM]


Update History:

Complete Update on 01/24/2001, 45 fields added/edited/deleted.Complete Update on 09/21/1999, 1 field added/edited/deleted.Complete Update on 08/24/1999, 6 fields added/edited/deleted.Complete Update on 01/27/1999, 1 field added/edited/deleted.Complete Update on 11/17/1998, 1 field added/edited/deleted.Complete Update on 03/08/1998, 1 field added/edited/deleted.Complete Update on 10/31/1997, 1 field added/edited/deleted.Complete Update on 04/24/1997, 2 fields added/edited/deleted.Complete Update on 03/18/1997, 1 field added/edited/deleted.Complete Update on 02/28/1997, 1 field added/edited/deleted.Complete Update on 10/18/1996, 1 field added/edited/deleted.Complete Update on 09/04/1996, 6 fields added/edited/deleted.Complete Update on 06/06/1996, 1 field added/edited/deleted.Complete Update on 01/27/1996, 1 field added/edited/deleted.Complete Update on 01/23/1995, 1 field added/edited/deleted.Complete Update on 12/30/1994, 1 field added/edited/deleted.Complete Update on 09/01/1994, 2 fields added/edited/deleted.Field Update on 07/28/1994, 1 field added/edited/deleted.Field Update on 11/01/1993, 1 field added/edited/deleted.Complete Update on 04/19/1993, 2 fields added/edited/deleted.Complete Update on 02/28/1993, 6 fields added/edited/deleted.Field update on 01/01/1993, 1 field added/edited/deleted.Field Update on 11/06/1992, 1 field added/edited/deleted.Field Update on 11/05/1992, 1 field added/edited/deleted.Field Update on 11/04/1992, 1 field added/edited/deleted.Field Update on 09/04/1992, 1 field added/edited/deleted.Field Update on 09/04/1992, 1 field added/edited/deleted.Complete Update on 01/28/1992, 1 field added/edited/deleted.Complete Update on 09/26/1991, 1 field added/edited/deleted.Complete Update on 09/10/1991, 60 fields added/edited/deleted.Field Update on 01/15/1990, 1 field added/edited/deleted.Complete Update on 01/11/1990, 10 fields added/edited/deleted.Complete Update on 04/30/1986

http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:2:updt [21/04/2001 9:22:37 AM]



http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~AAAjpayO0:2:RLN [21/04/2001 9:22:38 AM]