Potassium Metabisulfite

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art: N/A
Formula K2S2O5
Molar mass 222.312 g/mol
CAS number 16731-55-8

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Potassium disulfite 98%$

Description

The main use for the chemical is as an antioxidant or chemical sterilant. It is a disulfite and is chemically very similar to sodium metabisulfite, with which it is sometimes used interchangeably. Potassium metabisulfite is generally preferred out of the two as it does not contribute sodium to the diet. It is used as a food additive, also known as E224. It is restricted in use and may cause allergic reactions in some sensitive persons.Potassium metabisulfite is an inhibitor of the polyphenol oxidase enzyme. Potassium metabisulfite is a white granular or powdery solid with a sharp odor of sulfur dioxide. Decomposes at 150 to 190°C. Density 2.3 g/cm3. Contact severely irritates skin, eyes, and mucous membranes. Low toxicity. Used as a food preservative and an antioxidant.

Formula
K2S2O5
Molar mass
222.312 g/mol
CAS Number
16731-55-8
Density
2.3 g/cm3
Purity/Grade
≥98%
Appearance
Crystal
Flash point
not applicable
Water solubility
ca.22.2 g/l at 20°C (68°F)
pH
3.0 – 4.5 at 22.2 g/l at 25°C (77°F)
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