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Sodium Metabisulfite

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Sodium Metabisulfite is a white to slightly yellowish crystalline powder with sulfur dioxide odor; readily soluble in water. It is an inorganic compound composed of sodium, sulfur and oxygen and also known as Sodium Pyrosulfite or Disodium. Its chemical formula is Na2S2O5.
Industrial/Technical GradeSodium Metabisulfite is widely used in various industries.Many chemical properties of Sodium Metabisulfite or sodium pyrosulfite make it a versatile compound useful in many applications. Bisulfites are used in industries concerned with leather processing, food and beverage processing, gas purification, water treatment to remove excess chlorine, textiles and pulp processing, and many others.

a) Leather Processing Industries (SMBS) : Sodium Metabisulfite is used as leather processing chemical during the deliming process and helps to prevent formation of toxiz hydrogen sulphide gas during deliming. It also acts a bleaching agent. It makes leather soft, well-developed, tough waterproof, anti-break, wear-ability and etc.

b) Water Treatment Chemical : Sodium Metabisulfite plays an important part in the treatment of water, wastewater and waste as a strong reducing agent. Sodium Metabisulfite also assists in the dechlorination of drinking water as well as in the chlorine removal in waste waters. Another treatment method that utilizes Sodium Metabisulfite's effectiveness is in the reduction of chromium.

Small water treatment plants use sodium bisulfite to remove chlorine from the waste-water discharged back into lakes and rivers.

c) Dye-industry : used as dechlorination agent and cotton boiling-off agent for bleached cotton.

d) Photographic Industry :

Sodium Metabisulfite's acidic and preservative properties also make it an effective substitute for sodium bisulfite, a chemical which is used in traditional darkroom photography.


Categories:ETP Treatment Chemical


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