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3-ETHYL-3,7-DIMETHYLOCT-6-ENAL

CAS 34687-43-9
65

Safety score · 0–100

Fine

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

About

3-ethyl-3,7-dimethyloct-6-enal is a cosmetic ingredient used in product formulations. Exercise caution due to limited available safety data.

3-Ethyl-3,7-dimethyloct-6-enal is an aliphatic unsaturated aldehyde used in fragrance to provide fresh, citrus, and green notes. Aldehydes in this molecular weight range (C10-C12) are known fragrance allergens; the double bond increases reactivity and potential for Michael-type adduct formation with skin proteins. SCCS notes that aldehydes show higher sensitization rates than corresponding alcohols. IFRA standards restrict the use of unsaturated aldehydes in leave-on products at certain concentrations. EU declaration mandatory under Regulation 1223/2009 for fragrance allergen identification.

Known concerns

  • Aldehyde - known fragrance allergen with sensitization potential
  • Unsaturation increases reactivity - potential for protein adduct formation
  • IFRA restriction applies for leave-on products

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.