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Emollient

BUTYL UNDECENOATE

CAS 109-42-2 Updated
72

Safety score · 0–100

Fine

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

About

Butyl ester of undecylenic acid (castor-oil derivative). Light emollient and fragrance ester; well tolerated like other simple long-chain esters.

Function

PERFUMING

Skin benefits

  • Light emollient
  • Fragrance contributor
  • Castor-oil-derived chemistry

Known concerns

  • Mild irritant if neat
  • Thin dedicated CIR review

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