INTRODUCTION Working with chemicals has been historically viewed as a very risky task.

INTRODUCTION

Working with chemicals has been

historically viewed as a very risky task

Introduction

Experience shows that following safety

regulations reduces the probability of

accidents, including toxic exposures, to

negligible levels

Introduction

Before you begin an experiment in

the lab, ask yourself, “What would

happen if .. ?”

Your Responsibility for Accident Prevention

Accident Prevention

Accident prevention is a collective responsibility

that requires the full cooperation of everyone in

the laboratory

especially you......

Personal Protection Equipment (PPE)

Personal Protection Equipment (PPE)

Eye Protection Everyone in the laboratory, including visitors,

must wear chemical splash goggles (not safety

glasses or spectacles) at all times, even when not

performing a chemical operation

Personal Protection Equipment (PPE)

Eye Protection Normal prescription eyeglasses do not provide

appropriate laboratory eye protection

Contact lenses cannot provide adequate

protection in any environment in which an

accidental chemical splash can reasonably be

expected

Personal Protection Equipment (PPE)

Face Protection When necessary, appropriate laboratory bench

shields and use face shields wide enough and

long enough to protect your neck and ears must

be used

Personal Protection Equipment (PPE)

Clothing Clothing worn in labs should

• offer protection from splashes and spills;

• be easily removable in case of accident;

• be at least fire resistant

Non flammable, and nonporous lab aprons are

better than lab coats

Personal Protection Equipment (PPE)

Clothing If a lab coat is used instead of an apron, it should

have snap fasteners rather than buttons so it can

be easily removed

Personal Protection Equipment (PPE)

Clothing wear shoes with uppers made of leather or

polymeric leather substitute.

Do not go barefoot or wear sandals.

Do not wear shoes that have high heels or open

toes, uppers made of cloth, woven leather strips,

or other woven material.

Personal Protection Equipment (PPE)

Clothing Shorts, cutoffs, and miniskirts unnecessarily

expose your skin to potential corrosives and are

not safe.

Constrain long hair and loose clothing.

Personal Protection Equipment (PPE)

Clothing Constrain long hair and loose clothing (e.g.

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Personal Protection Equipment (PPE)

Clothing Do not wear jewellery (e.g. rings, bracelets, and

wristwatches )

jewellery can be damaged by chemical fumes and

spills

Chemical seepage in between the jewellery and

skin can put corrosives in intimate contact with

your skin

Personal Protection Equipment (PPE)

Clothing Wearing jewellery increases the risk of harmful

electrical shocks if comes in contact with

electrical sources

jewellery also can catch on equipment, causing

accidents.

Personal Protection Equipment (PPE)

Gloves Gloves are very important in labs

Gloves come in different types and materials (e.g.

latex, neoprene, butyl rubber)

Use gloves correctly

Always check your gloves before each use to

ensure the absence of cracks and small holes

Personal Protection Equipment (PPE)

Gloves To avoid unintentionally spreading chemicals,

remove your gloves before • leaving the work area

• handling such things as telephones, doorknobs, writing

instruments, laboratory notebooks, and textbooks

Personal Protection Equipment (PPE)

Gloves Be aware that no glove material can provide

permanent protection

If a chemical diffuses through a glove, it is then

held against your skin and you could receive

more exposure than if you hadn’t worn a glove at

all

Personal Protection Equipment (PPE)

Gloves Do not reuse gloves (such gloves should be

should be treated as hazardous waste)

Lab Safety Equipment

Safety Shower Eye WashFire

Extinguisher

Laboratory emergency deluge shower (safety shower)

Eyewash fountain

Fire extinguisher

Fire Blanket

Fume Hood

Protection from toxic fume

Lab Safety Symbols

Found in your textbook

• Glassware

• Heat

• Eye and Face

• Sharps

• Electrical

• Animal

• Chemical

• Fire

Other Chemical Hazards and Symbols

• Flammable

• Explosive

• Toxic/Poison

• Irritant

• Corrosive

• Environmental

Chemical Hazard Symbols and Definitions

• Flammable – Any substance that will burn if

exposed to an open flame.

• Explosive – A substance that may explode if

exposed to heat or flame.

• Toxic/Poison – A substance that can lead to death if inhaled, ingested, or absorbed by the skin.

• Corrosive – A substance that can destroy or burn living tissue and can eat away at other materials.

Chemical Hazard Symbols and Definitions

• Irritant - A substance that causes inflammation upon contact with skin or mucous membranes.

• Environmental - Substances that are harmful to the environment. They must be disposed of properly, not washed down the drain.

Chemical Hazard Symbols and Definitions

Laboratory Rules

No eating or drinking in labs

Do not enter stockroom or back halls

Clean up after yourself

Laboratory Etiquette

Clean your personal workspace after useWipe down benches with disinfectant before and after use.

Ensure that no trash is left behind

No trash in the sinks

Push in chairs