Sodium metabisulfite (Sodium Metabisulphite1) as a white or yellow crystalline powder or small crystals , with a strong smell of SO2 , the proportion of 1.4 , soluble in water , acidic aqueous solution , with a strong acid contact with the release SO2 and generate the corresponding salts, long home air , then oxidized into Na2S2O6, so the product can go far. Higher than 150 degrees Celsius, ie the decomposition of SO2.
The main purpose
Chemical industry: used in the production of sodium hydrosulfite , sulfamethazine dipyrone , caprolactam , etc., and chloroform , styrene sulfone and benzaldehyde purification. Photographic industry as a fixer ingredients. Perfume industry for the production of vanillin . Used as a preservative brewing industry , rubber coagulant and bleached cotton dechlorination agent. Organic intermediates , dyes , tanning as a reducing agent for electroplating industry, oilfield wastewater treatment as well as for mine processing agents .
Industry: industry for dyeing, organic synthesis , printing , leather , pharmaceutical and other sectors ; as a preservative in food processing , bleaching agents, bulking agent .
As chemical reagents: ( printing and photography , etc. ) , used as a bleaching agent mordant, reducing rubber coagulant , also used in organic synthesis, pharmaceutical and spices.
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