Amended Safety Assessment of Methylisothiazolinone as Used in Cosmetics

Author:

Burnett Christina L.1,Bergfeld Wilma F.2,Belsito Donald V.2,Cohen David2,Klaassen Curtis D.2,Liebler Daniel C.2,Marks James G.3,Peterson Lisa A.2,Shank Ronald C.2,Slaga Thomas J.2,Snyder Paul W.2,Heldreth Bart4

Affiliation:

1. Cosmetic Ingredient Review Senior Scientific Analyst/Writer

2. Expert Panel for Cosmetic Ingredient Safety Member

3. Expert Panel for Cosmetic Ingredient Safety Former Member

4. Cosmetic Ingredient Review Executive Director

Abstract

The Expert Panel for Cosmetic Ingredient Safety (Panel) reassessed the safety of Methylisothiazolinone, which functions as a preservative in cosmetics. The Panel reviewed relevant animal and human data provided in this safety assessment, and data from the previously published safety assessments of Methylisothiazolinone, and concluded that Methylisothiazolinone is safe for use in rinse-off cosmetic products at concentrations up to 100 ppm (ie, 0.01%) and safe in leave-on cosmetic products when they are formulated to be nonsensitizing, which may be determined based on a quantitative risk assessment or similar methodology.

Publisher

SAGE Publications

Subject

Toxicology

Reference26 articles.

1. Amended Safety Assessment of Methylisothiazolinone as Used in Cosmetics

2. Final Report of the Safety Assessment of Methylisothiazolinone

3. Special aspects of cosmetic spray safety evaluations: Principles on inhalation risk assessment

4. US Environmental Protection Agency (EPA). Registration Review Draft Risk Assessment for 2-Methyl-4-Isothiazolin-3-One (MIT) and 5-Chloro-2-Methyl-4-Isothiazolin-3-One (CMIT). Published April 6, 2020. Accessed May 27, 2020. 94.

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