Characteristics
- INCI
- Methylchloroisothiazolinone
- CAS
-
26172-55-4
This is the substance number in the Chemical Abstracts Service registry. The CAS number uniquely identifies a substance regardless of language, trade name, or synonyms.
- EC
-
247-500-7
This is the substance number in the European chemical identification system (EC number), used in European regulatory databases including ECHA/CosIng.
- IUPAC
- 5-Chloro-2-Methyl-2H-Isothiazol-3-One
- Functions
- preservative
- EU Restr.
-
V/39
EU regulatory status: restricted use. The ingredient is permitted in EU cosmetics but its use and labelling are regulated.
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Who it's for
Description
This totally unpronounceable ingredient (let’s take a shortcut: MCI) is a super effective preservative with both antibacterial and antifungal effects that works at very low concentrations.
The bad news with it though is that it can sensitize the skin easily (it’s a so-called non-fragrance allergen). It’s not permitted to be used alone, but only with its BFF, methylisothiazolinone (MI), another icky preservative. Together they have a broad spectrum antimicrobial effect but are permitted to be used only in rinse-off products (under 0.0015%).
Frequently Asked Questions about Methylchloroisothiazolinone
What is methylchloroisothiazolinone used for in shampoo and other products?
Is methylchloroisothiazolinone safe to use in cosmetics?
Can methylchloroisothiazolinone cause an allergy or skin reaction?
What is the difference between methylchloroisothiazolinone and methylisothiazolinone?
Should I avoid methylchloroisothiazolinone if I have sensitive skin or eczema?
Products with Methylchloroisothiazolinone (3 334 total)
Most often found in Kallos products (85 items)
