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DIMETHYL-3-METHYLPENTADIENYL-OXIRANE

CAS 69103-20-4
45

Safety score · 0–100

Moderate

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

About

DIMETHYL-3-METHYLPENTADIENYL-OXIRANE is a cosmetic ingredient used in product formulation. Exercise caution due to limited available safety data.

This oxirane (epoxide) derivative combines a dimethyl-substituted pentadienyl group with a three-membered ring epoxide. The epoxide functional group is a well-known structural alert for skin sensitization due to its electrophilic reactivity toward skin proteins (H317). The conjugated diene precursor also suggests potential for oxidation products. EU allergen declaration rules apply, requiring labeling when present above 0.001% in leave-on products. The compound should be used at minimal concentrations in fragrance compositions.

Skin benefits

  • Complex fragrance profile with modern character

Known concerns

  • H317 skin sensitization
  • Epoxide structural alert for protein reactivity
  • Oxidation products may increase allergenicity
  • EU fragrance allergen declaration required

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 — always read the physical product label and consult a healthcare professional for personal concerns.