methylchloroisothiazolinone
Also listed as: CMIT, MCI
High-efficiency synthetic preservative. Documented in vitro to possess endocrine-disrupting potential, mimicking estrogen. Suspected of contributing to bioaccumulation in dermal tissues.
- MicroplasticsNot flagged
- SugarsNot flagged
- Seed OilsNot flagged
- Skin
- Immune System
- Hormones / Endocrine
- FDAAllowed under maximum safety concentration thresholds
- EFSAStrictly restricted; select variants banned in leave-on baby products
PubMed References
Endocrine-disrupting properties and systemic absorption of methylchloroisothiazolinone(2022)
PubMed (PMID 28914602)→Last reviewed: May 2026
FAQ
Is methylchloroisothiazolinone bad for you?
High-efficiency synthetic preservative. Documented in vitro to possess endocrine-disrupting potential, mimicking estrogen. Suspected of contributing to bioaccumulation in dermal tissues.
What does methylchloroisothiazolinone do to your body?
methylchloroisothiazolinone primarily affects: Skin, Immune System, Hormones / Endocrine.
How often is it safe to consume methylchloroisothiazolinone?
Daily: Avoid — known endocrine disruptor risk. Weekly: Limit exposure to minimize bioaccumulation. Monthly: Generally tolerated.
What products contain methylchloroisothiazolinone?
methylchloroisothiazolinone is commonly found in cosmetic, household products. Use the Zeral app to scan any product and instantly see if it contains methylchloroisothiazolinone.
Related Ingredients
Other Cosmetic ingredients you should know about
Found methylchloroisothiazolinone on a label?Scan it in 10 seconds.
Avoid looking up compound chemistry manually. Point your camera at any label — Zeral parses ingredients, matches PubMed studies, and scores them against your specific profile.
iOS & Android · Ad-free · Free to start
Medical Disclaimer: The information on this page is compiled from peer-reviewed scientific studies and regulatory reports. It is intended for general awareness and educational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition.