Methylisothiazolinone
Strong biocide preservative. One of the most frequent contact allergens of the past decade – in the EU it is restricted to rinse-off products at very low concentrations.
Evidence by route
Topical application
DVery weak or conflicting data.
The European SCCS confirmed: in leave-on formulas MIT drives an epidemic of contact sensitization. Rinse-off products allow only microdoses, and sensitive skin should avoid it entirely.
Tolerability and safety
Irritation potential
HighAllergen risk
HighPregnancy
CautionSkin types
Use with caution
Frequently asked questions
Is Methylisothiazolinone safe during pregnancy?
Methylisothiazolinone should be used with caution during pregnancy. Consulting a dermatologist or OB-GYN is advisable.
What skin types is Methylisothiazolinone for?
Use with caution in: sensitive, dry.
Can Methylisothiazolinone irritate the skin?
Yes, Methylisothiazolinone has high irritation potential. Start at low concentrations, introduce gradually, and always use SPF during the day.
Can Methylisothiazolinone cause an allergic reaction?
Methylisothiazolinone has high allergen potential. Perform a patch test on the inner forearm 24 hours before facial application.