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O,O'-(Ethenylmethylsilylenedi[(4-methylpentan-2-one)oxime]

55

Safety score · 0–100

Moderate

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

A cosmetic ingredient used in product formulations. Its specific function may vary between products. Exercise caution due to limited available safety data.

This polysiloxane compound with pentanone oxime groups functions as a fragrance fixative and long-lasting fragrance material. It is not listed in EU Annex II or III of Regulation 1223/2009. The oxime functional groups may release methyl isobutyl ketone (MIBK) upon degradation, which has moderate toxicity concerns. Limited published safety data exists specifically for this compound in cosmetic applications, warranting precautionary assessment.

Skin benefits

  • Fragrance fixative
  • Extends fragrance longevity

Known concerns

  • Limited toxicity data
  • Potential degradation to methyl isobutyl ketone
  • May release oxime fragments

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.