Preservativehigh risk Common irritant
Methylchloroisothiazolinone
INCI · Methylchloroisothiazolinone
Often used with MIT. Highly allergenic preservative.
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High sensitization rate - restricted in EU cosmetics
How common is it?
Methylchloroisothiazolinone appears in 16 of 4,442 products (0.4%) in the AllerNote catalog, most often in cleansers (9 products). See the full prevalence dataset →
Names to look for on labels
Methylchloroisothiazolinone appears under any of these names — manufacturers choose between INCI, common, and local-language terms freely.
MethylchloroisothiazolinoneMCIKathon CG5-Chloro-2-methyl-4-isothiazolin-3-oneमिथाइलक्लोरोआइसोथियाज़ोलिनोन
Common product categories
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