Fragrance
Methyl trans-2-butenoate, when used as a fragrance ingredient
Safety score · 0–100
Moderate
Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.
About
A small unsaturated ester (methyl crotonate) used as a sweet, fruity fragrance note. The alpha,beta-unsaturation makes it a mild electrophile — sensitisation potential is real but lower than larger acrylate-type fragrances.
Skin benefits
- Provides a sweet, fruity-fragrance note
Known concerns
- Alpha,beta-unsaturated ester — Michael acceptor
- Skin and eye irritant
- Mild sensitisation potential
- IFRA Standard 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.