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Solvent

ETHYL PERFLUOROBUTYL ETHER

CAS 163702-05-4 Updated
20

Safety score · 0–100

Caution

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

About

A fluorinated PFAS solvent — one of the so-called forever chemicals. Volatile and useful as a carrier, but its environmental persistence and tightening EU restrictions push it firmly into the avoid tier.

Function

SOLVENT

Skin benefits

  • Volatile carrier solvent with rapid evaporation
  • Non-flammable processing aid

Known concerns

  • Member of the PFAS family of persistent 'forever chemicals'
  • Environmental persistence and bioaccumulation concerns
  • Increasingly restricted in EU cosmetics
  • Atmospheric greenhouse-gas potential

References

EU

EU CosIng database

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

Related solvents

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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.