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 .. ?”
Accident Prevention • Accident prevention is a collective responsibility that requires the full cooperation of everyone in the laboratory especially you......
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 lensescannot 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. شماغ).
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)
Safety Shower Lab Safety Equipment Fire Extinguisher Eye Wash
Protection from toxic fume Fume Hood
Glassware Heat Eye and Face Sharps Electrical Animal Chemical Fire Lab Safety Symbols Found in your textbook
Flammable Explosive Toxic/Poison Irritant Corrosive Environmental Other Chemical Hazards and Symbols
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.
Chemical Hazard Symbols and Definitions • Toxic/Poison – A substance that canlead 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.
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 use Wipe down benches with disinfectant before and after use. • Ensure that no trash is left behind • No trash in the sinks • Push in chairs