CheckVegan

Is Cysteic Acid vegan?

Cysteic Acid

Vegan Vegan
Vegetarian Vegetarian

Cysteic acid, also known as 3-sulfo-L-alanine, is an organic sulfonic acid compound derived from the oxidation of cysteine. It is used in cosmetics and can be produced synthetically or via the modification of amino acids.

Also known as Cysteate, L-3-Sulfoalanine
INCI name Cysteic Acid
CAS number 13100-82-8
EC number 207-861-3
CosIng ID 55569
Last reviewed 9 July 2026

An ingredient is considered vegan if it contains no animal-derived components at any point in its production.

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