Preservative
2-Methyl-2H-isothiazol-3-one
Safety score · 0–100
Caution
Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.
About
Methylisothiazolinone (MIT) — an aggressive preservative banned from leave-on cosmetics in the EU and capped at 0.0015% in rinse-off. Major cause of contact dermatitis.
Skin benefits
- Effective broad-spectrum preservative at very low %
Known concerns
- EU Annex V banned in leave-on
- Severe contact allergen
- Causing allergic contact dermatitis epidemic
- Restricted to 0.0015% in rinse-off
References
EU CosIng database
European Commission cosmetic ingredient registry — regulatory status, restrictions, authorised functions.
Related preservatives
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This profile is for educational purposes and does not constitute medical advice. Regulatory status and scientific understanding evolve — always read the physical product label and consult a healthcare professional for personal concerns.