Laboratory Safety-

Demonstrates safe practices during laboratory and field investigations, including the appropriate use of safety showers, eyewash fountains, safety googles, and fire extinguishers

Know specific hazards of chemical substances such as flammability, corrosiveness, and radioactivity as summarized on the Material Safety Data Sheets.

Hazard scale, signal word, pictograms, precautionary statements

Demonstrates understanding of the use and conservation of resources and proper disposal or recycling of materialsSolid and liquid chemical waste, broken glassware, spill cleanup, recycling paper, plastics, glass, metals

Communicate valid conclusions supported by the data through methods such as journals

LEAD QUESTION: You’re shopping for cleaning supplies at the local store. You find a cleaner that says it is “industrial strength” and decide to buy it to use at home. This cleaner is used to make shower tile sparkle clean. List the steps you would take to use this cleaner.

Would you take any special precautions? Read the directions more carefully?

Misconceptions: students may think all chemicals are hazardous, there are no chemicals in high school that could harm their healthUnderdeveloped: difficulty understanding all matter is chemical, level of exposure determines toxicityScaffolding: How does one decide the safety precautions that should be considered before conducting a lab or investigation? How do you use safety showers, eyewash fountains, safety goggles, and fire extinguishers appropriately in a lab? Why is it important to understand the hazards of chemical substances as summarized on the MSDSWhy is proper management of resources and proper disposal of materials important? What considerations might be required during a lab investigation for the conservation of resources and proper disposal or recycling of materials?

Laboratory Safety

Safety Symbols Hand Safety

o Always wear gloves or cloths to protect your hands when handling hot glass. Keep cloths clear of any flames

o Never force glass tubing into rubber tubing, stoppers, or corks. o Use tongs when heating test tubes. Never hold a test tube in your hand

to heat it. o Always allow hot glassware to cool before handling

Glassware Safetyo Check condition of glassware before/after using it. Inform your teacher

of any broken, chipped, or cracked glassware so it will not be used. o Do not pick up broken glass with your bare hands. Place broken glass in

a specially designated disposal container. Gas Precaution

o Do not inhale fumes directly. When instructed to smell a substance use your hand, waft fumes toward your nose, inhale gently.

Hygienic Careo Keep your hands away from your face and mouth in labo Always wash your hands before leaving the laboratory

Eye and Clothing Protectiono Wear laboratory aprons in the lab. Closed toed shoes and long pants

should be worn in lab. All loose jewelry and accessories should be removed.

o Wear safety goggles in the lab at all times. Know how to use the eyewash station.

Chemical Safetyo Never taste, eat, or swallow any chemicals in the lab. Do not eat or

drink any food from lab containers. Beakers are not cups. o Never return unused chemicals to the original container.o Some chemicals are harmful to the environment. Follow proper

disposal instructions. o Always label beakers and test tubes containing chemicals.o Keep glassware, containers of chemicals, or anything else near the edge

of a lab bench.Caustic Substances

o If a chemical gets on your skin or clothing or eyes, rinse it immediately and alert your teacher.

o If a chemical spills on the floor or lab bench, tell your teacher, but do not clean it up yourself unless your teacher says it’s okay to do so.

Heating Safetyo When heating a chemical in a test tube, always point the open end of

the test tube away from yourself and other people.Explosion Precaution

o When working with flammable liquids, be sure that no one else in the

NFPA

The Occupational Health and Safety Administration (OSHA) released a standard governing occupational exposure to hazardous materials in biology and chemistry laboratories. OSHA defines a hazardous chemical as any liquid, solid, or gas that could present a physical or health hazard to an individual. Examples include cleaning agents, degreasers, flammables, greases, paints, pesticides, aerosols, and compressed gases.

Safety Data Sheet provides you with procedures for handling chemical substances. They are broken into these sections: Product Identification- gives name of chemical, synonyms or trade names, chemical formula, and the CAS registry numberHazardous Ingredients- names of chemicals that make up this particular hazardous materialPhysical Characteristics- list information such as odor and appearanceFire and Explosion Hazards- Gives the flash points and the firefighting proceduresReactivity- Lists types of chemicals that shouldn’t be stored with this particular chemical.Health Hazards- Gives symptoms of overexposure and first aid proceduresPrecautions for Safe Handling and Use- lists personal protective equipment that is used when handling the chemicalSpill or Leak Procedure- how to control a spill or leak Special Precautions- special handling instructions

Practice reading labels & SDS- Read the given chemical reagent bottle and fill in the information. Then use the SDS sheet for the same chemical to finish the chart.

Chemical Name:__________________________________________________________ Formula:_____________________

Reagent Bottle SDS Sheet

Formula Weight

Chemical properties

Flammability

Health Hazards

Reactivity

First Aid

Storage

Clean up/ Disposal

Summarize the difference between the two safety information resources:

(Material) Safety Data Sheet- SDS

What are some occupations outside the science field that may be exposed to hazardous chemicals in the work place?