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Film Former

STYRENE/ISOPRENE COPOLYMER

CAS 25038-32-8
58

Safety score · 0–100

Moderate

Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.

A styrene-isoprene rubber polymer used as a flexible film former in long-wear makeup. Polymer is inert, but styrene monomer (IARC 2A) and microplastic concerns weigh it down.

Function

FILM FORMINGOPACIFYING

Skin benefits

  • Flexible film former
  • Adheres pigments
  • Long-wear in mascara/lipstick

Known concerns

  • Styrene monomer IARC 2A
  • Microplastic/persistence concerns
  • Trace residual monomers

References

EU

EU CosIng database

European Commission cosmetic ingredient registry: regulatory status, restrictions, authorised functions.

Related film formers

58
ACRYLONITRILE/METHACRYLONITRILE/METHYL METHACRYLATE COPOLYMER
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AMPD-ROSIN HYDROLYZED COLLAGEN
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BIS-HEMA POLY(CAPROLACTONE NEOPENTYL GLYCOL)/IPDI COPOLYMER
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BIS-HEMA POLY(DIGLYCOL ADIPATE)/IPDI COPOLYMER
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BIS-HEMA POLYNEOPENTYL GLYCOL ADIPATE/IPDI COPOLYMER
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BIS-HYDROXYETHYL ACRYLATE POLY(1,4-BUTANEDIOL)-9/TMHDI COPOLYMER
Film Former
 58
BIS-HYDROXYPROPYLTRISILOXYL IPDI/PEG-23 COPOLYMER
Film Former
 58
BIS-METHOXY PEG-10 DIMETHYL MEA/HDI/BIS-PEG-10 DIMETHICONE COPOLYMER
Film Former

Check your shelf

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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.