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Is Methylisothiazolinone vegetarian?

Methylisothiazolinone

Vegetarian Vegetarian
Vegan Vegan

Methylisothiazolinone (MIT/MI) is a synthetic heterocyclic organic compound used as a preservative and biocide in personal care products and industrial applications. It is known for its allergenic potential, including contact dermatitis.

Also known as 2-Methyl-2H-isothiazol-3-one, METHYLISOTHIAZOLINONE, MI, MIT
INCI name Methylisothiazolinone
CAS number 2682-20-4
EC number 220-239-6
CosIng ID 35341
Last reviewed 4 July 2026

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

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