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Is Aluminium Ammonium Sulphate vegetarian?

Aluminium Ammonium Sulphate

Vegetarian Vegetarian
Vegan 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 alum, ammonium, Aluminum ammonium bis(sulfate), Ammonium alum, Ammonium aluminium sulfate, Tschermigite
INCI name Aluminium Ammonium Sulphate
E number E523
INS number 523
EC number 232-055-3
CosIng ID 31844
Last reviewed 22 April 2026

An ingredient is considered vegetarian if it avoids components derived from killing an animal.

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