Methylchloroisothiazolinone
Methylchloroisothiazolinone
A synthetic preservative used to prevent microbial growth in cosmetic formulations. It is often used alongside Methylisothiazolinone as part of a preservative system.
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Safety: May cause allergic contact dermatitis in sensitive individuals and has become a common preservative allergen.
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Comedogenic rating(likelihood of clogging pores)
Rating not yet available for this ingredient✓ Does not disqualify fragrance-free, alcohol-free, SLS-free or paraben-free claims
Common names & aliases
MCI
Functions
🔒 Preservative
Prevents bacterial and fungal growth, keeping the formula safe to use.
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Found in these products