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Fragrance

9-UNDECENAL

CAS 143-14-6
58

Safety score · 0–100

Moderate

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

A long-chain unsaturated aldehyde used for citrus-floral perfume notes. Like other aliphatic aldehydes, it can sensitize skin, so cosmetic use is limited to fragrance traces.

Function

PERFUMING

Skin benefits

  • Citrus-floral fragrance note
  • Trace fragrance use
  • Volatile aldehyde

Known concerns

  • Skin sensitizer potential
  • Aldehyde irritation
  • Restricted by IFRA

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.