Is Potassium Metabisulphite vegan?

Potassium Metabisulphite

Vegan

Potassium Metabisulphite is a synthetic inorganic compound used as a preservative and antioxidant in food and beverages, particularly in winemaking and brewing. It releases sulphur dioxide, which prevents oxidation and microbial spoilage.

Also known as Campden tablet ingredient, K2S2O5, Potassium metabisulfite, Potassium pyrosulfite, Potassium pyrosulphite
E number E224
CAS number 16731-55-8
EC number 240-795-3
Last reviewed 22 April 2026

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