CheckVegan

Is Quaternium-15 vegetarian?

Quaternium-15

Vegetarian Vegetarian
Vegan Vegan

Quaternium-15 is a synthetic quaternary ammonium salt used as a preservative and antimicrobial agent in cosmetics; it functions by slowly releasing formaldehyde.

Also known as 426-020-3, Cis-1-(3-chlorallyl)-3,5,7-triaza-1-azoniaadamantane chloride, cis-CTAC, Methenamine 3-chloroallylochloride
INCI name Quaternium-15
CAS number 51229-78-8
EC number 223-805-0
CosIng ID 37406
Last reviewed 9 July 2026

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

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