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Sodium Metabisulfite

Sodium Bisulfite
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Sodium metabisulfite, also called Sodium Pyrosulfite or Disodium, is an inorganic compound composed of sodium, sulfur and oxygen. Its chemical formula is Na2S2O5. It typically comes in a white or yellowish-white crystalline powder. It easily dissolves in water. The substance is sometimes referred to as disodium (metabisulphite). It is used as a disinfectant,antioxidant and preservative agent.


Industrial Uses

Sodium Bisulphite Use
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Many chemical properties of Sodium Metabisulfite or sodium pyrosulfite make it a versatile compound useful in many applications. It can eliminate dissolved oxygen in waste water and in pipes. It functions as a bleaching agent, which is useful in making paper pulp, cotton and wool. It is used in water treatment plants to remove excess chlorine. In beer and wine manufacturing, Sodium Metabisulfite or sodium pyrosulfite checmicals are often used to sterilize the equipment.



Food Preservative

Sodium Bisulphite Use
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Sodium metabisulphite or sodium pyrosulfite is used as a food preservative. It is commonly used as a food preservative for dried foods, like potato chips, raisins and apples, as well as fruit concentrate juices. It acts as an antimicrobial, inhibiting the growth of fungi and bacteria, thereby keeping food fresh and safe.




Medicinal Use

Sodium Bisulphite Use
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Sodium metabisulphite is an antioxidant additive in injectable medicines and is also used as a reducing agent in pharmaceuticals.




Sodium Metabisulfite as a Cleaner

Sodium Bisulfite Use
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Sodium metabisulphite is also present in wines and beers, as it is used as both a sterilizer and an antioxidant in the process of brewing beer or fermenting wine. The chemical is also used in the process of purifying water, cleaning water pipes and reverse osmosis membranes in desalinization equipment as it is an antibacterial.




Sodium Metabisulfite in Other Uses

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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.

Also, Sodium Metabisulfite is used as a bleaching agent in pulp and textile manufacture, as well as a reducing agent in pharmaceuticals. It is also a known preservative in cosmetics.

The chemical, in concentrated form, has also been used in landscape gardening as a tree stump remover, as it disintegrates the lignin -- chemicals in plant cell walls -- in the tree stumps, making them easier to remove.

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