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Is Sulfanilic Acid vegetarian?

Sulfanilic Acid

Vegetarian Vegetarian
Vegan Vegan

Sulfanilic acid (4-aminobenzenesulfonic acid) is a synthetic aromatic compound used as a hair dye ingredient, including its salt forms.

Also known as 208-208-5, 4-Aminobenzenesulfonic acid, 515-74-2
INCI name Sulfanilic Acid
CAS number 121-57-3
EC number 204-482-5
CosIng ID 31102
Last reviewed 9 July 2026

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

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