Fragrance
trans-2-Hexenal diethyl acetal, when used as a fragrance ingredient
Safety score · 0–100
Caution
Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.
About
An acetal that hides — and then releases — a strongly sensitising unsaturated aldehyde once it contacts skin. Treated as severely as the parent aldehyde by IFRA and EU regulation.
Skin benefits
- Provides green-leafy, apple-like fragrance note
- More stable than parent aldehyde
Known concerns
- Hydrolyses on skin to release sensitising trans-2-hexenal
- Strong skin sensitiser via aldehyde release
- EU Annex III restricted at low limits
- IFRA Standard severe restriction
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.