Methylchloroisothiazolinone
Strong preservative from the isothiazolinone family (CMIT). The EU banned it in leave-on cosmetics from 2015 due to a contact allergy epidemic.
Evidence by route
Topical application
DVery weak or conflicting data.
One of the strongest contact sensitizers in cosmetics on record. Rinse-off products tolerate it only at low concentrations up to 15 ppm.
Tolerability and safety
Irritation potential
HighAllergen risk
HighPregnancy
CautionSkin types
Use with caution
Frequently asked questions
Is Methylchloroisothiazolinone safe during pregnancy?
Methylchloroisothiazolinone should be used with caution during pregnancy. Consulting a dermatologist or OB-GYN is advisable.
What skin types is Methylchloroisothiazolinone for?
Use with caution in: sensitive, dry.
Can Methylchloroisothiazolinone irritate the skin?
Yes, Methylchloroisothiazolinone has high irritation potential. Start at low concentrations, introduce gradually, and always use SPF during the day.
Can Methylchloroisothiazolinone cause an allergic reaction?
Methylchloroisothiazolinone has high allergen potential. Perform a patch test on the inner forearm 24 hours before facial application.