U.P CHEMICALS

Sodium metabisulphite, also known as sodium pyrosulphite, is a white-to-yellowish, soluble crystalline powder with the odour of sulphur dioxide and is 65.5 per cent sulphur dioxide by weight. It is a strong reducing agent.

Some of its major applications are as a preservative in the starch and food industry, to control melanosis (black spot) in shrimp, for fermentation in the wine industry, as an antichlor in the chemical industry and as a redox catalyst in the acrylic fibre industry. Sodium metabisulphite is also used as a reducing agent in the purification of aldehydes and ketones, for the manufacture of sulphonated oil and sulphonated resin, for the detoxification of cyanide in gold ore processing plants and in the manufacture of photographic chemicals.

sodium metabisulphite

Formula: Na2S2O5 Synonyms Sodium metabisulphite Sodium disulphite / Sodium disulphite Sodium pyrosulphite / Sodium pyrosulphite Grade: This product is available in three grades: Photo Food Technical Properties: Molecular weight: 190.12 Appearance: White, free-flowing crystalline powder Odour: Slight odour of sulphur dioxide CAS No: 7681- 57- 4 Applications: Food As a preservative in fruits and starch As an enzyme inhibitor in melanin formation (black and brown spots) Treatment of waste water As an antichlor and in the detoxification of cyanide and chromate Textile For bleaching wool and jute Gold mining To destroy cyanides Paper and pulp For bleaching ground wood As an antichlor Photography and film For developer solutions and acidifying fixing baths Packaging  50-kg HDPE bags