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Fragrance

8-UNDECENAL

CAS 58296-81-4
80

Safety score · 0–100

Good

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

An unsaturated C11 aldehyde (undec-8-enal) used for waxy-citrus character. Double bond is distal from the aldehyde so reactivity is similar to saturated C11.

8-Undecenal (CAS 58296-81-4) is an unsaturated eleven-carbon aldehyde used in perfumery for waxy-citrus fragrance character. The 8-position double bond is non-conjugated with the aldehyde, so reactivity profile resembles saturated undecanal rather than a Michael-acceptor enal. RIFM/IFRA evaluated. Not on EU Annex II.

Function

PERFUMING

Skin benefits

  • Waxy-citrus fragrance note
  • Classical aldehyde-family use

Known concerns

  • Aldehyde class sensitization vigilance
  • Oxidation stability
  • Mild irritation neat

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.