SODIUM METABISULFITE

Molecular formula：Na2S2O5

Specification:

Character: 

Sodium metabisulfite is white or yellow crystalline powder or small crystals, with a strong smell of SO2, specific gravity 1.4, soluble in water, acidic aqueous solution, contact with strong acid is released SO2 and generate the corresponding salts, for a long time in the air, is oxidized to Na2S2O6, so the product cannot be far.

Usage:

1) Chemical used in the production of rongalite, sulfanilamide dimethyl pyrimidine analgin, caprolactam and chloroform, such as styrene acrylic sulfone and purification of benzaldehyde. Photographic industry ingredients used as a fixative.Spices industry for the production of vanillin.Preservatives used in brewing industry, rubber curing agent and the bleached cotton dechlorinating agent.Organic intermediates, dyes, leather used as reducing agent Used in electroplating industry, oil field wastewater treatment, and used as mine dressing agent, etc. 

2) IndustrialUsed in organic synthesis, printing and dyeing, printing, leather, pharmaceutical and other departments;As a preservative in food processing, bleach, bulking agent. 

3) Used as a chemical reagent (printing and photography and so on), used as a bleach mordant, reductant rubber curing agent, also used in organic synthesis pharmaceutical, spices, and so on.