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Thickener

BUTYLENE/ETHYLENE COPOLYMER

CAS 9019-29-8
78

Safety score · 0–100

Fine

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

A butylene-ethylene hydrocarbon copolymer that thickens oil-based products and adds texture. Cosmetically inert, but the polyolefin class is being squeezed by EU microplastic regulations.

Function

VISCOSITY CONTROLLING

Skin benefits

  • Viscosity control
  • Anhydrous formula stability
  • Texture enhancement

Known concerns

  • Hydrocarbon polymer — microplastic-class
  • EU intentionally-added microplastic restriction (Regulation 2023/2055) phasing in
  • Inert in topical use

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.