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16731-55-8
K2S2O5
19160800PD
95%
-325 Mesh.etc
240-795-3
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.
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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