Preservativehigh risk Common irritant
Methylchloroisothiazolinone
INCI · Methylchloroisothiazolinone
Often used with MIT. Highly allergenic preservative.
Why dermatologists flag it
High sensitization rate - restricted in EU cosmetics
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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