Tags: Chemical Compound, Chemical Substance.
Potassium metabisulfite K2S2O5 also known as potassium pyrosulfite is a white crystalline powder with a pungent sulfur odour. 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.
