Potassium metabisulfite

Rarity: Uncommon

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Notion

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Science and technology

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What Wikipedia says

Potassium metabisulfite, K2S2O5, also known as potassium pyrosulfite, is a white crystalline powder with a pungent odour. It is mainly used as an antioxidant or chemical sterilant. As a disulfite, it is chemically very similar to sodium metabisulfite, with which it is sometimes used interchangeably.

Excerpt from the Wikipedia article “Potassium metabisulfite”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: NEUROtiker, Public domain, via Wikimedia Commons.