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Fragrance

TRANS-2-METHYLPENT-2-ENOIC ACID

CAS 16957-70-3
55

Safety score · 0–100

Moderate

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

A branched unsaturated carboxylic acid used mainly as a fragrance manufacturing intermediate. Mild irritant and possible sensitizer; rarely a finished-product fragrance allergen.

Function

PERFUMING

Skin benefits

  • Fragrance intermediate
  • Functional building block in perfumery

Known concerns

  • Mild skin sensitization potential
  • Carboxylic acid irritant at higher concentrations
  • Limited cosmetic safety data

References

EU

EU CosIng database

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

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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.