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CETYL TRIMETHOXYSILANE

CAS 16415-12-6
70

Safety score · 0–100

Fine

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

About

Cetyl Trimethoxysilane is a cosmetic ingredient. Exercise caution due to limited available safety data.

Cetyl Trimethoxysilane (CAS 16415-12-6) is an organosilicon compound with a cetyl (C16) alkyl chain attached to a trimethoxysilane group. Upon hydrolysis it forms silanol groups that can bond to surfaces. In cosmetics it is used for its water-repellent and film-forming properties. Not specifically restricted in EU Annex III, though organosilanes should be used according to Good Manufacturing Practice. PubChem CID: 85406.

Skin benefits

  • Water-resistant film formation on skin
  • Improves long-wear properties of formulations
  • Provides smooth, hydrophobic surface feel

Known concerns

  • May cause skin irritation in sensitive individuals at high concentrations

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.