Safety Rules



1. If you see something in the classroom or laboratory that is dangerous, tell the teacher at once.

2. Rags or paper towels with flammable liquids or solids in or on them must be put in a metal or crockery container with a lid.

3. Any spill on the floor can cause an accident. Always clean it up at once.

4. Alcohol, ether, and other volatile materials that can burn easily should never be used near an open flame.

5. When you work with laboratory chemicals and Bunsen burners, long hair must be kept out of the way by wearing a band.

6. When you work with laboratory chemicals, equipment, or burners, all loose clothes and loose jewelry must be removed.

7. If you are hurt (cut, burned, and so on) tell the teacher at once.

8. Whenever you are in the classroom or laboratory, you should wear closed shoes.

9. If you think there is something wrong with a piece of equipment you are using, stop, turn it off, and tell the teacher.

10. If you break a piece of glassware or other equipment, tell the teacher at once.

11. All floors, aisles, and passageways, should be kept clear of laboratory equipment and chemicals.

12. If you see a fire in an apparatus assembly or a burning liquid such as alcohol, it is best to put it out with the ABC fire extinguisher.

13. To put out a fire in a person's hair or clothing use the fire blanket.

14. The correct way to move about the classroom or laboratory is to walk.

15. Helping to clean up the classroom or laboratory is the job of each student.

16. When you used laboratory equipment or chemicals, you should give the procedures all of your attention, interest, and effort.

17. Chemicals, small parts, glassware, and stirring rods are not to be put in your mouth.

18. To prevent accidents during laboratory activities with chemicals and equipment you should follow your teacher's directions.

19. Playing (as opposed to working) in the laboratory or bothering another person is always against the rules.

20. To be able to put out a fire quickly and safely you should know how to use the extinguishers, where the extinguishers are located, and which extinguisher is used for each class of fire.

21. If flammable liquids such as alcohol are spilled, you should first tell the teacher.

22. Before you touch an electrical switch plug or outlet your hands must be dry.

23. Eyeglasses do not provide as much protection as a face shield, safety glasses, or splash proof goggles.

24. Laboratory aprons, when provided are for the protection of you and your clothes.

25. Cabinet drawers and doors that are left open cause a hazard and should be closed by you.

26. In case of a fire in the laboratory, notify the teacher at once and then be prepared to evacuate the building or laboratory.

27. All chemicals should be stored in properly labeled containers.

28. When preparing dilute solutions of an acid carefully pour acid to water.

29. If acid gets on your skin or clothes wash at once with water.

30. Spilled bases can be neutralized and made safe with a dilute acetic acid solution (vinegar).

31. Spilled acids can be made safe with sodium bicarbonate solution.

32. You must wear approved eye protection while working in the laboratory whenever the lab instructions tell you to.

33. Disrupting other students while they are working in the laboratory is dangerous.

34. You should prepare for each laboratory activity by reading all instructions before you start to work.

35. When measuring small amounts of corrosive or caustic liquids with a pipette draw the liquid to the tube by using a rubber suction bulb.

36. When heating a substance in a test tube, be sure the open end of the tube points towards no other person.

37. After heating a glass tube to bend it the soonest you can safely handle the tubing is after you are sure that it is cool.

38. To insert glass tubing into a rubber stopper, you should (after fire polishing and cooling) lubricate with water or glycerin use a towel for protection and twist carefully.

39. To remove an electrical plug from its socket you should pull the plug itself.

40. Draw a picture of the classroom.




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