Prohibited carcinogen
4-methylimidazole
Safety score · 0–100
Avoid
Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.
A small heterocyclic chemical listed as a possible human carcinogen by IARC and Proposition 65. It is not an approved cosmetic ingredient and is treated as an impurity to be controlled, not an active.
Skin benefits
- Has been used as a chemical intermediate in synthesis
- Not intentionally added to finished cosmetics
Known concerns
- Classified by IARC as possibly carcinogenic to humans (Group 2B)
- California Proposition 65 listed carcinogen
- EU Annex II prohibition discussions for cosmetic use
- Forms as an impurity in caramel coloring and should be minimized
References
EU CosIng database
European Commission cosmetic ingredient registry: regulatory status, restrictions, authorised functions.
Related prohibited carcinogens
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This profile is for educational purposes and does not constitute medical advice. Regulatory status and scientific understanding evolve, so always read the physical product label and consult a healthcare professional for personal concerns.