Ingredient profile
METHYLISOTHI-AZOLINONE
Raters disagreepreservativeCAS 2682-20-4
At least one of our safety lists speaks to this ingredient. Also written as Methylisothi-azolinone.
Raters don't agree. Here's where each one stands
Safe
Greenlens Ingredient Scan
Independent
Greenlens Precautionary Screen
Independent
Greenlens Tolerance Screen
Independent
Caution
Health Canada Ingredient Hotlist
Government
EU Harmonised Classification (CLP Annex VI)
Government
Concern
—
Where each list lands
Funding shown- Caution
Health Canada Ingredient Hotlist
Government
A potent sensitizer: not permitted in leave-on products; capped in rinse-off products. (Health Canada Cosmetic Ingredient Hotlist)
- Caution
EU Harmonised Classification (CLP Annex VI)
Government
Carries an EU harmonised classification (Skin Sens. 1A) — a skin sensitiser under CLP Annex VI, index 613-326-00-9. A hazard classification, not proof of harm at the level used. (EU CLP Regulation Annex VI, Table 3 (harmonised classification, ECHA export))
- Safe
Also screened — not on these lists
- California Proposition 65
- US NTP Report on Carcinogens
- IARC Monographs
- ANSES Endocrine Disruptors
- EU Microplastics Restriction
Notes
- EU harmonised skin sensitizer
- Health Canada Hotlist — restricted
