synthetic polymer
STYRENE/METHYLSTYRENE COPOLYMER
Safety score · 0–100
Fine
Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.
Styrene/methylstyrene copolymer is a film-forming polymer used in color cosmetics, generally inert in finished form but flagged for residual monomer and microplastic environmental concerns.
Skin benefits
- Film-forming polymer for color cosmetics
- Improves wear and water resistance
- Inert and non-reactive in finished products
- Good compatibility with pigments
Known concerns
- Residual styrene monomer is a possible carcinogen (IARC 2A)
- Microplastic environmental concerns in rinse-off products
- Not biodegradable
- Restricted in some EU microplastic regulations
References
EU CosIng database
European Commission cosmetic ingredient registry: regulatory status, restrictions, authorised functions.
Related synthetic polymers
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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.