Lab Safety
NSF North Mississippi GK-8
Why is Lab Safety Important?
• Lab safety is a major aspect of every lab based science class.
• Lab safety rules and symbols are needed so that students do not injure themselves or their classmates.
NSF North Mississippi GK-8
General Safety Rules1. Always follow the teacher’s
directions and only do lab work when a teacher is present.
2. Conduct yourself in a responsible manner at all times. No Horseplay!
3. Do not touch any equipment, chemicals, or other materials until told to do so.
4. Do not eat food, drink beverages, or chew gum in the lab. Do not use lab glassware as food or beverage containers
5. Report ALL accidents to your teacher immediately, even if you think it is minor.
6.After handling chemicals, always wash your hands with soap and water.
7. During lab work, keep your hands away from your face.
8. Tie back long hair
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7. Roll up loose sleeves.
8. Know the location of the fire extinguisher, fire blanket, eyewash station, and first aid kit.
9. Keep your work area uncluttered. Take to the lab station only what is necessary.
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10.Never put anything into your mouth during a lab experiment.
11. Clean up your lab area at the conclusion of the laboratory period.
NSF North Mississippi GK-8
Clothing
Wear:• Goggles/safety glasses• Closed-toed shoes• Clothing made of natural based
fiber such as cotton• Tie back long hair
Do NOT Wear:• Sandals• Jewelry• Loose or Baggy clothing
B. Glassware Safety
1. Chipped or cracked glassware should not be used. Show it to the teacher.
2. Broken glassware should not be disposed of in a classroom trashcan. There is a special glass disposal container for it.
3. When pouring liquids into glassware, make sure the container you are pouring into is resting on a table at least a handsbreadth from the edge.
B. Glassware Safety4. Pour down a glass stirring
rod to prevent liquids from splattering.
5. If a piece of glassware gets broken, do not try to clean it up by yourself. Notify the teacher.
6. 9. Do not place hot glassware in water. Rapid cooling may make it shatter.
C. Chemical Safety1. Wear protective goggles and
a lab apron whenever heating or pouring hazardous chemicals.
2. Never mix chemicals together unless you are told to do so (and then only in the manner specified).
3. Never taste any chemicals (you should never taste anything in the lab).
C. Chemical Safety4. If you need to smell the odor
of a chemical, waft the fumes toward your nose with one hand. Do not put your nose over the container and inhale the fumes.
5. Never pour water into a concentrated acid. Acid should be poured slowly into water.
C. Chemical Safety
6. Follow the instructions of your teacher when disposing of all chemicals.
7. First ask your teacher where/how to dispose of waste.
8. Never pour anything down the drain unless you are told to do so.
9. Wash your hands after handling hazardous chemicals.
NSF North Mississippi GK-8
Reasons for proper waste disposal
• Hazardous chemicals down the drain can lead to pollution of ground water, lakes, rivers, etc.
• Plants and animals will die if they are exposed to hazardous chemical waste.
• Serious health problems will become present in people if hazardous waste finds its way into drinking water.
D. Electrical Safety
1. Lay electrical cords where no one can trip on them or get caught in them.
2. Be sure your hands and your lab area are dry before using electrical equipment.
3. Never poke anything into electrical outlets.
D. Electrical Safety
4. Unplug cords by pulling the plug and not the cord.
5. Unplug all electrical equipment at the end of the lab period.
E. Heating Safety
1. Let burners and hotplates cool down before touching them. Test to see if they are cool enough by bringing the back of your hand close to them.
2. Use tongs and/or protective gloves to handle hot objects.
3. Never reach across an open flame or burner.
E. Heating Safety4. The only type of glassware that
may safely be heated is either Kimax or Pyrex.
5. Always point the top ends of test tubes that are being heated away from people.
6. When heating a test tube, move it around slowly over the flame to distribute the heat evenly.
E. Heating Safety
7. Only glassware that is thoroughly dry should be heated.
8. Never leave a burner or hotplate unattended.
Lab Safety Equipment
Safety Shower
Safety Goggles
Eye Wash
Lab Safety Equipment
Fire
Extinguisher
Fire Blanket Fume Hood
NSF North Mississippi GK-8
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.
NSF North Mississippi GK-8
Chemical Hazard Symbols and Definitions
• 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.
NSF North Mississippi GK-8
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.
NSF North Mississippi GK-8
Accidents and Injuries• Report ALL accidents and injuries to
your teacher immediately!!! • Be aware of safety hazards
associated with each chemical you use.
• Eye accident – Wash the eye with copious amounts of water for at least 15 min.
• Fire Burns – Stop, Drop, and be covered with a fire blanket or soaked with water. Do not remove clothing stuck to victim. Get medical attention immediately.
