When using explosion-proof refrigerators to store chemicals in the institute, the following matters need to be noted:

1. Understand the nature of the chemical: clarify the characteristics of the chemical to be stored, including whether it is flammable, explosive, volatile, easy to hydrolyze, corrosive, etc., to determine whether it is suitable for storage in the explosion-proof refrigerator.

2. Choose the right explosion-proof refrigerator: according to the type of chemicals and storage capacity, choose the refrigerator with the corresponding explosion-proof grade and volume.

3. Classified storage: Chemicals are classified and stored according to their nature. For example, flammable, low-temperature storage, corrosive liquids, and drugs that produce toxic gases or smoke should be stored separately.

- Volatile, unstable, low boiling point compounds, as well as medicines that require low temperature storage must be placed in explosion-proof refrigerators as required. For example, flammable liquids with flash points below 25 ° C include ether, gasoline, carbon disulfide, acetone, benzene, ethyl acetate, methyl acetate, etc.; The flash point below 25℃ are butyl ketone, toluene, methanol, ethanol, isopropyl alcohol, xylene, butyl acetate, amyl acetate, triformaldehyde, pyridine, etc. Such reagents are required to be stored separately in a cool and ventilated place, the ideal storage temperature is -4 ~ 4℃, and special attention should be paid to stay away from the fire source.

- Low temperature storage reagents need to be stored at a low temperature to avoid polymerization or deterioration or other accidents, such as methyl methacrylate, styrene, acrylonitrile, vinyl acetylene and other polymerizable monomers, hydrogen peroxide, ammonium hydroxide, etc., need to be stored at a temperature below 10℃.

4. Sealed container: Containers of flammable and explosive items stored in the refrigerator must be highly sealed without any gaps to prevent steam leakage.

5. Isolation storage: Follow the corresponding isolation storage regulations, such as oxidants and reducing agents and organic compounds can not be mixed; Halogens (fluorine, chlorine, bromine, iodine) avoid ammonia, acid and organic matter; Strong acids, especially sulfuric acid, should not be mixed with strong oxidant salts (such as potassium permanganate, potassium chlorate, etc.). Salts that react with acids to produce harmful gases (such as potassium cyanide, sodium sulfide, sodium nitrite, sodium chloride, sodium sulfite, etc.) can not be mixed with acids; Drugs that are easy to hydrolyze (such as acetic anhydride, acetyl chloride, dichlorosulfoxide, etc.) avoid acid, alkali and water; Many organic compounds avoid oxidizing agent, sulfuric acid, nitric acid and halogen, initiator and monomer mixing, avoid moisture preservation; Ammonia should not be in contact with halogens, hypochlorous acids, acids and mercury.

6. Control the storage capacity: strictly control the storage capacity of dangerous chemicals in the refrigerator to avoid excessive storage. Generally speaking, the laboratory using hazardous chemicals should strictly control the amount of hazardous chemicals temporarily stored in the laboratory shall not exceed one week, and the total amount of hazardous chemicals stored in each laboratory in addition to compressed gas and liquefied gas shall not exceed 100L or 100kg, of which the total amount of flammable and explosive chemicals shall not exceed 50L or 50kg. And the single packaging container should not be larger than 20L or 20kg. The remaining hazardous chemicals in the experiment should be disposed of harmlessly in time.

7. Post warning signs: Post obvious warning signs on explosion-proof refrigerators to remind others to pay attention to safety.

8. Comply with the operating procedures: Operate in strict accordance with the instruction manual of the explosion-proof refrigerator, including correctly connecting the power supply and setting the appropriate temperature.

9. Regular maintenance inspection: Regularly check the power cable, temperature control device, safety lock, explosion-proof device and other parts of the refrigerator to ensure that they work normally. If abnormal conditions are found, contact professionals in time for repair or replacement.

10. Environmental testing: Regularly test the laboratory environment, including ventilation, temperature control, etc., to ensure that the laboratory air circulation is smooth and the temperature is appropriate.

11. Training and education: Users need to receive relevant training to understand the characteristics of chemicals, the use of explosion-proof refrigerators and emergency treatment measures.

12. It is strictly prohibited to mix: common items and dangerous chemicals cannot be stored together in the explosion-proof refrigerator.

It should be noted that the storage of hazardous chemicals is a matter that cannot tolerate any carelessness, and relevant regulations and precautions should be strictly observed to ensure safety. At the same time, different institutes may have certain rules and requirements, which also need to be complied with. If in doubt about the storage of certain chemicals, it is recommended to consult the relevant professional or safety management.