Fragrance
TRIMETHYLUNDECADIENOL
Safety score · 0–100
Fine
Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.
About
A branched long-chain dienol fragrance ingredient with green-floral character. Lower reactivity than the matching aldehyde; still a conservative yellow on thin public data.
Trimethylundecadienol (CAS 24048-14-4) is a long-chain branched unsaturated alcohol used in perfumery. Alcohols are inherently less reactive toward skin proteins than the corresponding aldehydes, so the sensitization profile is generally more favorable. However, the two alkene functionalities introduce oxidative vulnerability — air exposure can generate more reactive hydroperoxide and carbonyl species over time. Public SCCS/CIR cosmetic-specific data for this exact structure is limited; fragrance industry manages it under RIFM/IFRA at standard use levels.
Function
Skin benefits
- Green-floral note
- Substantivity
- Alcohol class (lower reactivity than aldehydes)
Known concerns
- Autoxidation potential
- Limited public data
References
EU CosIng database
European Commission cosmetic ingredient registry — regulatory status, restrictions, authorised functions.
Related fragrances
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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.