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Potassium metabisulfite (K2S2O5)-Powder

Potassium metabisulfite (K2S2O5)-Powder

CAS: 16731-55-8
Molecular Formula: K2S2O5
Purity: 95%
Products Code: TR19160800UN
Specification Model: -325 Mesh.etc
EINECS No.: 240-795-3
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Potassium metabisulfite (K2S2O5)-Powder introduce:

Characteristic




Potassium metabisulfite, K2S2O5, also known as potassium pyrosulfite, is a white crystalline powder with a pungent odour. As a disulfite, it is chemically very similar to sodium metabisulfite, with which it is sometimes used interchangeably. Potassium metabisulfite has a monoclinic crystal structure.




Chemical formula:K2S2O5

Molar mass:222.31 g·mol−1

Appearance:White crystalline powder

Odor:Pungent (sulfur dioxide)

Density:2.34 g/cm3 (solid)

Melting point:190 °C (374 °F; 463 K) decomposes

Solubility in water:450 g/l (20 °C)

Solubility:Insoluble in ethanol




Application




It serves as a component of certain photographic developers and its solution is used in photographic fixing, in the textile industry for dyeing and cotton printing. It is utilized to precipitate gold from solution in aqua regia.
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