1, you must wear a white coat and gloves during the experiment; Concentrated acid and caustic soda are very corrosive, so don't splash them on skin and clothes.

2, the use of concentrated nitric acid, hydrochloric acid, sulfuric acid, perchloric acid, ammonia and other toxic and malodorous gas experiments, should be carried out in a ventilated kitchen or under ventilated conditions.

3. When moving and opening a large bottle of liquid medicine, the bottle should not be placed directly on the concrete floor. It is best to use blankets or straw mats. If it is wrapped in plaster, the blisters can be opened after they are soft. It is forbidden to knock or knock with a hammer to prevent it from being broken.

4. When opening the volatile reagent bottle bottle stopper, don't aim the bottle mouth at your face or others, and don't aim your nose at the bottle mouth of reagent bottle.

5. When using the reagent, put the bottle stopper upside down in a clean place, and cover and seal it immediately after use. ?

6. Dilute the solution. When diluting sulfuric acid, it must be carried out in a heat-resistant container, and sulfuric acid must be slowly added to water under constant stirring. Never add water to concentrated sulfuric acid to prevent acid splashing, which is very dangerous. Dissolving heating substances such as sodium hydroxide and potassium hydroxide must also be carried out in a heat-resistant container.

7. The remaining drugs in the experiment can neither be put back into the original bottle, nor can they be discarded at will, nor can they be taken out of the laboratory. They should be put back in the designated container.

8. Don't take the experiment out of the laboratory without permission.

9. Pay attention to safety when heating the lamp. The alcohol in the alcohol lamp shall not exceed 2/3 of the capacity; When the alcohol in the lamp is less than 1/4, add alcohol after extinguishing the fire. When the alcohol lamp is about to burn out, the lamp is still on. Never spray oil. When the alcohol lamp goes out, cover it with the lamp cap and don't blow it with your mouth to prevent accidents. Don't light it with alcohol lamp, lest alcohol overflow and cause burns. Put out the lighted matches immediately after using them, and don't throw them about.

10, flammable solvent heating, must be carried out in a water bath, avoid using open flame; Never put the electric furnace into the experimental cabinet to avoid fire. When heating or pouring liquid, don't look down at the container to prevent droplets from splashing and causing injury. When heating the test tube, don't aim the nozzle at yourself or others, so as not to spray medicine and hurt people.

1 1. When removing the boiled solution, gently shake it with the bottle clamp before removing it, so as not to spill it.

12. Containers with strong corrosiveness, flammability, toxicity or explosion shall be cleaned by operators themselves. Empty reagent bottle should be broken before being thrown into the trash can to avoid accidents.

13. When using glass instruments, please handle them carefully to avoid damage and injury.

14, it is forbidden to open the switch and electrical switch with wet hands, and do not use any leakage instrument to avoid electric shock.

15, after the test, conduct a systematic inspection of the laboratory; After work, tidy up the equipment, tools and various materials, cut off the power supply, and close the doors, windows and faucets.