Fragrance
TRIMETHYL-4,9-DECADIENAL
Safety score · 0–100
Fine
Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.
A specialty branched polyunsaturated aldehyde used in perfumery for green-citrus facets. Limited public dossier, so scored with caution.
Trimethyl-4,9-decadienal (CAS 32803-39-7) is a synthetic polyunsaturated branched aldehyde used as a fragrance ingredient for fresh green, fatty-citrus, and aldehydic accords. The conjugated/polyene aldehyde structure is oxidatively labile and typically stabilized in formulation. Public safety data are sparse; industry IFRA/RIFM programs would govern use levels. Not listed on EU Annex II.
Function
Skin benefits
- Green-aldehydic top note
- Used at trace dosage
Known concerns
- Thin public safety dossier
- Oxidative instability
- Potential irritation if neat
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, so always read the physical product label and consult a healthcare professional for personal concerns.