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Fragrance

2,4-DIMETHYLHEPTA-2,2-DIENAL

CAS 85136-08-9
65

Safety score · 0–100

Fine

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

About

A branched conjugated dienal used as a green fragrance note. Alpha,beta-unsaturated aldehydes are reactive by design — scored with caution.

2,4-Dimethylhepta-2,4-dienal (CAS 85136-08-9) is a branched conjugated dienal used in perfumery for green, fatty facets. Alpha,beta-unsaturated aldehydes (Michael acceptors) carry structural alerts for sensitization and mild reactivity with thiol/amine nucleophiles. Dienal class includes known fragrance sensitizers. Public cosmetic-specific toxicology is limited; industry RIFM programs would govern use. Default-down applied.

Function

PERFUMING

Skin benefits

  • Green-fresh fragrance note

Known concerns

  • Michael-acceptor sensitization alert
  • Class-level sensitization signals
  • Thin public dossier
  • Oxidation instability

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.