Skip to content

Fragrance

Methyl trans-2-butenoate, when used as a fragrance ingredient

CAS 623-43-8
55

Safety score · 0–100

Moderate

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

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

EU CosIng database

European Commission cosmetic ingredient registry: regulatory status, restrictions, authorised functions.

Related fragrances

55
1-TRIMETHYL-3-CYCLOHEXENYLETHANONE
Fragrance
 55
2,3,6-TRIMETHYLCYCLOHEXYLMETHYL ACETATE
Fragrance
 55
2,4,6-TRIMETHYL-3-CYCLOHEXENYL-4-PENTEN-3-ONE
Fragrance
 55
2,4,6-TRIMETHYL-4-PHENYL-1,3-DIOXANE
Fragrance
 55
2,5-DIMETHYLPYRAZINE
Fragrance
 55
2,6,10-Dodecatrien-1-ol, 3,7,11-trimethyl-
Fragrance
 55
2-DODECENAL
Fragrance
 55
2-ETHYLIDENEDECANAL
Fragrance

Check your shelf

Find Methyl trans-2-butenoate, when used as a fragrance ingredient in your products.

Scan any cosmetic product with LuxSense to see if it contains Methyl trans-2-butenoate, when used as a fragrance ingredient and get a full ingredient breakdown with safety scores.

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.