Ingredient profile
Methylchloroisothiazolinone
Raters disagreepreservativeCAS 26172-55-4
At least one of our safety lists speaks to this ingredient. Also written as METHYLCHLOROISOTHIAZOLINONE, methylchloroisothiazolinone.
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
Concern
—
Where each list lands
Funding shown- Caution
Health Canada Ingredient Hotlist
Government
A potent sensitizer permitted only in combination with MI, in rinse-off products at a strict cap. (Health Canada Cosmetic Ingredient Hotlist)
- Safe
Greenlens Ingredient Scan
Independent
No EU-regulated hazard recognized for this ingredient.
- Safe
Greenlens Precautionary Screen
Also screened — not on these lists
- California Proposition 65
- US NTP Report on Carcinogens
- IARC Monographs
- ANSES Endocrine Disruptors
- EU Microplastics Restriction
- EU Harmonised Classification (CLP Annex VI)
Notes
- Health Canada Hotlist — restricted
