Amended Safety Assessment of Methylchloroisothiazolinone and Methylisothiazolinone as Used in Cosmetics

Christina L. Burnett; Wilma F. Bergfeld; Donald V. Belsito; Curtis D. Klaassen; Daniel C. Liebler; James G. Marks; Lisa A. Peterson; Ronald C. Shank; Thomas J. Slaga; Paul W. Snyder; Bart Heldreth

doi:10.1177/10915818211016382

Amended Safety Assessment of Methylchloroisothiazolinone and Methylisothiazolinone as Used in Cosmetics

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

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11 Scopus citations

Abstract

The Expert Panel for Cosmetic Ingredient Safety (Panel) reassessed the safety of the mixture Methylchloroisothiazolinone (MCI)/Methylisothiazolinone (MI), which functions as a preservative in cosmetic products. The Panel reviewed relevant animal and human data provided in this safety assessment, and data from the previously published safety assessment of this mixture, and concluded that MCI/MI is safe in cosmetics when formulated to be nonsensitizing, based on the results of a quantitative risk assessment or similar methodology; however, at no point should concentrations exceed 7.5 ppm in leave-on products or 15 ppm in rinse-off products.

Original language	English (US)
Pages (from-to)	20S-33S
Journal	International journal of toxicology
Volume	40
Issue number	1_suppl
DOIs	https://doi.org/10.1177/10915818211016382
State	Published - Aug 2021

All Science Journal Classification (ASJC) codes

Toxicology

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Burnett, C. L., Bergfeld, W. F., Belsito, D. V., Klaassen, C. D., Liebler, D. C., Marks, J. G., Peterson, L. A., Shank, R. C., Slaga, T. J., Snyder, P. W., & Heldreth, B. (2021). Amended Safety Assessment of Methylchloroisothiazolinone and Methylisothiazolinone as Used in Cosmetics. International journal of toxicology, 40(1_suppl), 20S-33S. https://doi.org/10.1177/10915818211016382

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title = "Amended Safety Assessment of Methylchloroisothiazolinone and Methylisothiazolinone as Used in Cosmetics",

abstract = "The Expert Panel for Cosmetic Ingredient Safety (Panel) reassessed the safety of the mixture Methylchloroisothiazolinone (MCI)/Methylisothiazolinone (MI), which functions as a preservative in cosmetic products. The Panel reviewed relevant animal and human data provided in this safety assessment, and data from the previously published safety assessment of this mixture, and concluded that MCI/MI is safe in cosmetics when formulated to be nonsensitizing, based on the results of a quantitative risk assessment or similar methodology; however, at no point should concentrations exceed 7.5 ppm in leave-on products or 15 ppm in rinse-off products.",

author = "Burnett, {Christina L.} and Bergfeld, {Wilma F.} and Belsito, {Donald V.} and Klaassen, {Curtis D.} and Liebler, {Daniel C.} and Marks, {James G.} and Peterson, {Lisa A.} and Shank, {Ronald C.} and Slaga, {Thomas J.} and Snyder, {Paul W.} and Bart Heldreth",

note = "Funding Information: The author(s) disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: The articles in this supplement were sponsored by the Cosmetic Ingredient Review. The Cosmetic Ingredient Review is financially supported by the Personal Care Products Council. Publisher Copyright: {\textcopyright} The Author(s) 2021.",

year = "2021",

month = aug,

doi = "10.1177/10915818211016382",

language = "English (US)",

volume = "40",

pages = "20S--33S",

journal = "International journal of toxicology",

issn = "1091-5818",

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T1 - Amended Safety Assessment of Methylchloroisothiazolinone and Methylisothiazolinone as Used in Cosmetics

AU - Burnett, Christina L.

AU - Bergfeld, Wilma F.

AU - Belsito, Donald V.

AU - Klaassen, Curtis D.

AU - Liebler, Daniel C.

AU - Marks, James G.

AU - Peterson, Lisa A.

AU - Shank, Ronald C.

AU - Slaga, Thomas J.

AU - Snyder, Paul W.

AU - Heldreth, Bart

N1 - Funding Information: The author(s) disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: The articles in this supplement were sponsored by the Cosmetic Ingredient Review. The Cosmetic Ingredient Review is financially supported by the Personal Care Products Council. Publisher Copyright: © The Author(s) 2021.

PY - 2021/8

Y1 - 2021/8

N2 - The Expert Panel for Cosmetic Ingredient Safety (Panel) reassessed the safety of the mixture Methylchloroisothiazolinone (MCI)/Methylisothiazolinone (MI), which functions as a preservative in cosmetic products. The Panel reviewed relevant animal and human data provided in this safety assessment, and data from the previously published safety assessment of this mixture, and concluded that MCI/MI is safe in cosmetics when formulated to be nonsensitizing, based on the results of a quantitative risk assessment or similar methodology; however, at no point should concentrations exceed 7.5 ppm in leave-on products or 15 ppm in rinse-off products.

AB - The Expert Panel for Cosmetic Ingredient Safety (Panel) reassessed the safety of the mixture Methylchloroisothiazolinone (MCI)/Methylisothiazolinone (MI), which functions as a preservative in cosmetic products. The Panel reviewed relevant animal and human data provided in this safety assessment, and data from the previously published safety assessment of this mixture, and concluded that MCI/MI is safe in cosmetics when formulated to be nonsensitizing, based on the results of a quantitative risk assessment or similar methodology; however, at no point should concentrations exceed 7.5 ppm in leave-on products or 15 ppm in rinse-off products.

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JF - International journal of toxicology

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ER -

Amended Safety Assessment of Methylchloroisothiazolinone and Methylisothiazolinone as Used in Cosmetics

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