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Surface Treatment

TRIMETHOXYCAPRYLYLSILANE

CAS 3069-40-7
84

Safety score · 0–100

Good

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

A silicone surface-treatment used to coat sunscreen minerals and pigments — makes them spread better, feel silkier, and reduces photoreactivity of titanium dioxide. Cures into a stable layer; very safe in finished products.

Skin benefits

  • Hydrophobic coating for mineral pigments and TiO2/ZnO sunscreens
  • Improves dispersion and sensory feel of powders
  • Reduces photoreactivity of titanium and zinc oxides
  • Long established safety profile

Known concerns

  • Releases methanol on hydrolysis — formulators must ensure proper curing
  • Not typically encountered as a free ingredient

References

EU

EU CosIng database

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

Related surface treatments

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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.