1, used as chromatographic reagent, preservative and reducing agent, used in dye and pharmaceutical industries;
2. The reducibility of sodium sulfite is stronger than that of sulfite, and its function is similar to that of sodium sulfite. China's regulations can be used for candied fruit, biscuits, sugar, rock sugar, caramel, candy, glucose and liquid.
3. The food industry is used as bleaching agent, preservative, loosening agent, antioxidant, color fixative and preservative.
4. The pharmaceutical industry is used to produce chloroform, phenylpropanesulfonic acid and benzaldehyde. Rubber industry is used as coagulant. Printing and dyeing industry is used as dechlorination agent and scouring aid for bleached cotton cloth.
As follows:
Sodium pyrosulfite (Na2S2O5) is an inorganic compound with white or yellow crystals and a strong pungent smell. It is soluble in water, and the aqueous solution is acidic. When it comes into contact with strong acid, it will release sulfur dioxide and form the corresponding salt. If left in the air for a long time, it will be oxidized into sodium sulfate, so sodium pyrosulfite can't last long.
Used to produce sodium hydrosulfite, sulfamethazine, metamizole, caprolactam, etc. Used for the purification of chloroform, phenylpropanesulfonic acid and benzaldehyde. Components used as fixing agents in the photographic industry; The perfume industry is used to produce vanillin; Used as preservative in brewing industry; Rubber coagulant and dechlorination agent after cotton bleaching; Organic intermediate; Used for printing and dyeing and tanning; Used as reducing agent.
Used as electroplating industry, oilfield wastewater treatment and mine mineral processing agent; Used as preservative, bleaching agent and loosening agent in food processing. Closed operation, strengthen ventilation. Operators must be specially trained and strictly abide by the operating procedures. It is recommended that the operator wear a self-priming filter dust mask, chemical safety glasses, gas-proof overalls and rubber gloves.
Avoid dust. Avoid contact with oxidants and acids. When handling, handle with care to prevent the packaging and containers from being damaged. Equipped with leakage emergency treatment equipment. Empty containers may leave harmful substances behind.
Store in a cool, dry and well-ventilated warehouse. Stay away from fire and heat sources. Keep the container sealed. Should be stored separately from oxidants, acids and edible chemicals, and should not be mixed. It should not be stored for a long time to avoid deterioration. The storage area should be equipped with suitable materials to control leakage.