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STEARYL TRIETHOXYSILANE

CAS 7399-00-0
70

Safety score · 0–100

Fine

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

About

Stearyl Triethoxysilane is a cosmetic ingredient. Exercise caution due to limited available safety data.

Stearyl Triethoxysilane (CAS 7399-00-0) is an organosilicon compound with a stearyl (C18) chain and three ethoxy groups. Upon hydrolysis it forms reactive silanol groups capable of bonding to skin and hair surfaces, creating hydrophobic films. Used in long-wear and water-resistant cosmetic formulations. Not specifically restricted under EU cosmetics law. PubChem CID: 81885.

Skin benefits

  • Water-resistant film formation
  • Improves long-wear of cosmetic products
  • Provides hydrophobic protective layer

Known concerns

  • May be irritating to eyes or skin 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.