Methylisothiazolinone
A cosmetic ingredient used as preservative in skincare, haircare, and personal-care products sold in the European Union.
What is it?
2-Methyl-2H-isothiazol-3-one
What does it do?
Methylisothiazolinone is listed in the EU cosmetic ingredient inventory with the following declared functions:
-
Preservative
prevents microbial growth in cosmetic products, extending shelf life and protecting users
EU regulatory status
Methylisothiazolinone is listed in Annex V of EU Cosmetics Regulation 1223/2009 as a substance permitted for the corresponding category of use.
Frequently asked questions
What is Methylisothiazolinone?
Methylisothiazolinone is a cosmetic ingredient catalogued in the EU CosIng database. 2-Methyl-2H-isothiazol-3-one
Is Methylisothiazolinone allowed in cosmetics in the EU?
Yes. Methylisothiazolinone is allowed for use in cosmetic products in the EU under Regulation 1223/2009.
What does Methylisothiazolinone do in cosmetic products?
Methylisothiazolinone is declared in the EU cosmetic ingredient inventory with these functions: preservative.
What is the CAS number of Methylisothiazolinone?
The CAS (Chemical Abstracts Service) number for Methylisothiazolinone is 2682-20-4.
Related ingredients
Source: EU CosIng database (European Commission). This page is derived from public-sector information published by the European Commission. · Last updated: 06/08/2020