CheckVegan

Is HC Red No. 18 vegan?

HC Red No. 18

Vegan Vegan
Vegetarian Vegetarian

HC Red No. 18 is a synthetic organic dye used in cosmetic hair colouring formulations, belonging to the class of HC (hair colour) direct dyes.

Also known as 2-Chloro-4-{(E)-[3-(methylthio)-1,2,4-thiadiazol-5-yl]diazenyl}phenol, HC Red No 18
INCI name HC Red No. 18
CosIng ID 91430
Last reviewed 4 July 2026

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

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