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Fragrance

4,8-DIMETHYL-4,9-DECADIENAL

CAS 71077-31-1
55

Safety score · 0–100

Moderate

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

A branched diene aldehyde used for green, floral, citrus-fatty notes. Aldehyde-class reactivity warrants orange tier despite longer chain length.

4,8-Dimethyl-4,9-decadienal (CAS 71077-31-1) is a long-chain branched diene aldehyde used in perfumery. While the longer aliphatic chain and internal double-bond positions reduce reactivity compared with short conjugated dienals like 2,4-hexadienal, the molecule still belongs to the broader reactive-aldehyde class and is subject to autoxidation on air exposure. Public CIR/SCCS data for this specific isomer is limited; RIFM/IFRA manage fragrance aldehydes at controlled levels. Placed orange (55) reflecting structural class and data sparsity, rather than any direct hazardous classification.

Function

PERFUMING

Skin benefits

  • Green-floral fragrance note

Known concerns

  • Diene aldehyde reactivity class
  • Oxidation potential
  • Limited public data

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.