Film Former
STYRENE/METHYLSTYRENE/INDENE COPOLYMER
Safety score · 0–100
Fine
Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.
An aromatic hydrocarbon copolymer used as a film former, providing hardness and gloss to coatings. Residual styrene (IARC 2A) anchors this to a cautious Fine despite the polymer matrix mitigating exposure.
Function
Skin benefits
- Film-forming with hardness and gloss
- Improves opacity in coatings
- Provides durability to cosmetic films
Known concerns
- Residual styrene monomer is IARC Group 2A (probably carcinogenic)
- Methylstyrene is a respiratory irritant
- Indene polymer purity controls vary
- Hydrocarbon resin in unhydrogenated form may oxidize
References
EU CosIng database
European Commission cosmetic ingredient registry: regulatory status, restrictions, authorised functions.
Related film formers
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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.