Prohibited CMR substance
(Epoxyethyl)benzene (Styrene oxide)
Safety score · 0–100
Avoid
Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.
Reactive epoxide classified as a category 1B carcinogen under EU CLP and prohibited in cosmetics. Highly mutagenic and irritating, with no acceptable cosmetic use.
Skin benefits
- No accepted cosmetic benefit
- Used historically only as a chemical intermediate
Known concerns
- Classified CMR (carcinogen category 1B) under EU CLP
- Prohibited in cosmetic products under EU Annex II
- Highly reactive epoxide, mutagenic and genotoxic
- Strong skin and respiratory irritant
References
EU CosIng database
European Commission cosmetic ingredient registry: regulatory status, restrictions, authorised functions.
Related prohibited cmr substances
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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.