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Thickener

HYDROGENATED STYRENE/ISOPRENE COPOLYMER

CAS 68648-89-5
72

Safety score · 0–100

Fine

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

A hydrogenated styrene-isoprene polymer — used as an oil thickener and gloss agent in lipsticks and balms. Inert polymer; microplastic optics in rinse-off.

Function

VISCOSITY CONTROLLING

Skin benefits

  • Effective oil-phase thickener
  • Excellent gloss in lipsticks/balms
  • Stable, inert polymer
  • Good for long-wear color

Known concerns

  • Microplastic concerns in rinse-off
  • Limited cosmetic safety literature

References

EU

EU CosIng database

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

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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.