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Burnett CL, Boyer I, Bergfeld WF, Belsito DV, Hill RA, Klaassen CD, Liebler DC, Marks JG, Shank RC, Slaga TJ, Snyder PW, Gill LJ, Heldreth B. Amended Safety Assessment of Methylisothiazolinone as Used in Cosmetics. Int J Toxicol 2019; 38:70S-84S. [DOI: 10.1177/1091581819838792] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The Cosmetic Ingredient Review Expert Panel (Panel) reviewed the safety of methylisothiazolinone (MI), which functions as a preservative. The Panel reviewed relevant animal and human data provided in this safety assessment and in a previously published safety assessment of MI and concluded that MI is safe for use in rinse-off cosmetic products at concentrations up to 100 ppm and safe in leave-on cosmetic products when they are formulated to be nonsensitizing, which may be determined based on a quantitative risk assessment.
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Affiliation(s)
- Christina L. Burnett
- Cosmetic Ingredient Review Scientific Analyst/Writer, Cosmetic Ingredient Review, Washington, DC, USA
| | - Ivan Boyer
- Cosmetic Ingredient Review Former Toxicologist, Cosmetic Ingredient Review, Washington, DC, USA
| | - Wilma F. Bergfeld
- Cosmetic Ingredient Review Expert Panel Member, Cosmetic Ingredient Review, Washington, DC, USA
| | - Donald V. Belsito
- Cosmetic Ingredient Review Expert Panel Member, Cosmetic Ingredient Review, Washington, DC, USA
| | - Ronald A. Hill
- Cosmetic Ingredient Review Expert Panel Member, Cosmetic Ingredient Review, Washington, DC, USA
| | - Curtis D. Klaassen
- Cosmetic Ingredient Review Expert Panel Member, Cosmetic Ingredient Review, Washington, DC, USA
| | - Daniel C. Liebler
- Cosmetic Ingredient Review Expert Panel Member, Cosmetic Ingredient Review, Washington, DC, USA
| | - James G. Marks
- Cosmetic Ingredient Review Expert Panel Member, Cosmetic Ingredient Review, Washington, DC, USA
| | - Ronald C. Shank
- Cosmetic Ingredient Review Expert Panel Member, Cosmetic Ingredient Review, Washington, DC, USA
| | - Thomas J. Slaga
- Cosmetic Ingredient Review Expert Panel Member, Cosmetic Ingredient Review, Washington, DC, USA
| | - Paul W. Snyder
- Cosmetic Ingredient Review Expert Panel Member, Cosmetic Ingredient Review, Washington, DC, USA
| | - Lillian J. Gill
- Cosmetic Ingredient Review Former Director, Cosmetic Ingredient Review, Washington, DC, USA
| | - Bart Heldreth
- Cosmetic Ingredient Review Executive Director, Cosmetic Ingredient Review, Washington, DC, USA
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Multicenter Patch Testing With Methylisothiazolinone and Methylchloroisothiazolinone/Methylisothiazolinone Within the International Contact Dermatitis Research Group. Dermatitis 2017; 28:210-214. [DOI: 10.1097/der.0000000000000272] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Scherrer MAR, Rocha VB, Andrade ARC. Contact dermatitis to methylisothiazolinone. An Bras Dermatol 2016; 90:912-4. [PMID: 26734880 PMCID: PMC4689087 DOI: 10.1590/abd1806-4841.20153992] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2014] [Accepted: 09/19/2014] [Indexed: 12/02/2022] Open
Abstract
Methylisothiazolinone (MI) is a preservative found in cosmetic and industrial
products. Contact dermatitis caused by either
methylchloroisothiazolinone/methylisothiazolinone (MCI/MI or Kathon CG) or
MI has shown increasing frequency. The latter is preferably detected
through epicutaneous testing with aqueous MI 2000 ppm, which is not
included in the Brazilian standard tray. We describe a series of 23
patients tested using it and our standard tray. A case with negative
reaction to MCI/MI and positive to MI is emphasized.
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Methylchloroisothiazolinone/Methylisothiazolinone and Methylisothiazolinone Sensitivity in Hungary. Dermatol Res Pract 2016; 2016:4579071. [PMID: 27047541 PMCID: PMC4800086 DOI: 10.1155/2016/4579071] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2015] [Revised: 01/25/2016] [Accepted: 02/08/2016] [Indexed: 11/18/2022] Open
Abstract
Background. Due to allowing of methylisothiazolinone (MI) in cosmetics, cleaning products, and paints, an epidemic of MI-hypersensitivity emerged. Patch testing Kathon CG® (3:1 mixture of methylchloroisothiazolinone and methylisothiazolinone, MCI/MI) does not correctly detect MI contact allergy, due to the low concentration of MI in the test material. Methods. A retrospective survey was performed to estimate the prevalence of MCI/MI hypersensitivity in 14693 patients tested consecutively between 1993 and 2014. Moreover, currently 314 patients were prospectively tested with the allergens MCI/MI and with MI during one year. Results. MCI/MI hypersensitivity increased retrospectively from 0.5% to 6.0%. By current prospective testing we detected 25 patients (8%) with MCI/MI and/or MI positive reactions. Out of the 25 patients 10 were only MCI/MI positive, 9 were only MI positive, and 6 were MCI/MI and MI positive. If MI had not been tested separately, MI contact allergy would have missed in 36% of all detected cases and in 2.8% of the total 314 patients. Conclusions. The frequency of MCI/MI hypersensitivity is increasing also in Hungary. We confirm that, in order to detect MI contact allergy, it needs to be tested separately. A further increase of MI hypersensitivity might be expected in the future as products containing MI are still widely available.
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Dinkloh A, Worm M, Geier J, Schnuch A, Wollenberg A. Contact sensitization in patients with suspected cosmetic intolerance: results of the IVDK 2006-2011. J Eur Acad Dermatol Venereol 2014; 29:1071-81. [DOI: 10.1111/jdv.12750] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2014] [Accepted: 08/13/2014] [Indexed: 02/02/2023]
Affiliation(s)
- A. Dinkloh
- Department of Dermatology, Venereology and Allergy; Charité Universitätsmedizin; Berlin Germany
| | - M. Worm
- Department of Dermatology, Venereology and Allergy; Charité Universitätsmedizin; Berlin Germany
| | - J. Geier
- Information Network of Departments of Dermatology; Georg-August University; Göttingen Germany
| | - A. Schnuch
- Information Network of Departments of Dermatology; Georg-August University; Göttingen Germany
| | - A. Wollenberg
- Department of Dermatology, Venereology and Allergy; Ludwig-Maximilians-Universität; Munich Germany
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