Main applications: chemical and pharmaceutical industry
1. Sodium metabisulfite is used for the production of sodium hydrosulfite, sulfadimethylpyrimidine, analgin, caprolactam and the purification of chloroform, phenylpropylsulfone and benzaldehyde.
2. Used as a fixer in the photographic industry.
3. In fragrance industry, it is used to produce vanillin.
4. Used as industrial preservative in brewing, rubber coagulant and dechlorination agent for cotton cloth after bleaching.
5. In Organic intermediates, dyes and tanning, it is used as reducing agents for electroplating, wastewater treatment in oil fields and as mineral dressing agents in mines.
6. In industrial, it is used for printing and dyeing, organic synthesis, printing, leather, pharmaceutical and other departments;
7. Used as a preservative, bleach and loosening agent in food processing.
8. Used as chemical reagents (printing and dyeing, photography, etc.), used as bleaching mordant, reducing agent, rubber coagulant, also used in organic synthesis, pharmaceutical and spices.
Effect
1. Used as bleaching agent, mordant, reducing agent, rubber coagulant, also used in organic synthesis, pharmaceutical and spices.
2. Used as a chromatographic reagent, preservative and reductant in the dyestuff and pharmaceutical industries.
3. Sodium metabisulfite is more reductive than sulfite and acts similar to sodium sulfite.
4. Use in food industry as bleaching agent, preservative, loosening agent, antioxidant, color protector and fresh-keeping agent.
5. In pharmaceutical industry it is used for the production of chloroform, phenylpropylsulfone and benzaldehyde. In rubber industry, used as a coagulant. In printing and dyeing industry, used for cotton bleach after the dechlorination agent, cotton refining additives. In leather industry, used for leather treatment, which can make the leather soft, plump, tough, waterproof, flexural, wear-resistant and other properties. In chemical industry, used for the production of hydroxyvanillin, hydroxyamine hydrochloride and so on. In photosensitive industry, it is used as developer.
