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Film Former

HYDROGEN TRIFLUOROPROPYL DIMETHICONE

CAS 766542-38-5
70

Safety score · 0–100

Fine

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

About

A fluorinated silicone used to give long-wear makeup its water and oil resistance. Safe on skin but part of a wider conversation about fluorochemicals in cosmetics.

Hydrogen Trifluoropropyl Dimethicone (CAS 766542-38-5) is a silicone copolymer incorporating trifluoropropyl side groups, giving exceptional oil and water resistance used in long-wear cosmetics. It is distinct from PFAS polymers such as PTFE but shares the regulatory conversation around fluorinated materials in cosmetics; several jurisdictions (California, EU draft restrictions) are moving to restrict PFAS-family ingredients. Dermal safety at cosmetic concentrations appears favorable per industry data; no SCCS opinion. Environmental persistence and the broader fluoro-material policy context warrant the default-down placement.

Function

ANTIFOAMINGBINDINGEMULSION STABILISING

Skin benefits

  • Fluorinated silicone for water and oil resistance
  • Long-wear performance in makeup
  • Adds slip and spreading

Known concerns

  • Fluorinated segment raises PFAS-adjacent environmental concerns
  • Not biodegradable
  • Limited standalone review

References

EU

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 — always read the physical product label and consult a healthcare professional for personal concerns.