Is Aluminium Sodium Sulphate vegan?

Aluminium Sodium Sulphate

Vegan

Aluminium Sodium Sulphate (sodium alum) is an inorganic salt used as a firming agent and stabiliser (E521) in food products.

Also known as Soda alum, Sodium alum, Sodium aluminium sulfate
E number E521
Last reviewed 22 April 2026

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