CheckVegan

Is Methylisothiazolinone vegan?

Methylisothiazolinone

Vegan Vegan
Vegetarian Vegetarian

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

Classifications are made to the best of our knowledge based on available scientific and regulatory sources. We cannot guarantee the accuracy of every entry, errors in the sources we draw from can always occur. This tool also cannot account for cross-contamination, which depends entirely on individual suppliers and producers. If you believe a classification is incorrect, you can report an issue.

Report an issue