Is Aluminium Ammonium Sulphate vegan?

Aluminium Ammonium Sulphate

Vegan

Aluminium Ammonium Sulphate (ammonium alum) is an inorganic salt used as a firming agent and stabiliser (E523) in food products, and also as an astringent in cosmetics.

Also known as Ammonium alum, Ammonium aluminium sulfate, Tschermigite
E number E523
Last reviewed 22 April 2026

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