Tr
Trimethoxycaprylylsilane
Trimethoxycaprylylsilane
Coats mineral pigments and powders so they spread smoothly instead of clumping.
What it does
It bonds to the surface of particles such as titanium dioxide and makes them repel water. It doesn’t act on skin itself.
The evidence, graded
expert consensusUS safety reviewers (2017) assessed four alkoxyl alkyl silanes. Triethoxycaprylylsilane and trimethoxycaprylylsilane coat particles and help powders such as titanium dioxide spread evenly. They judged all four safe as used, and asked makers to keep heavy metals and other impurities low.Becker 2017 · Cosmetic Ingredient Review ↗
Graded per the methodology: strong · moderate · emerging · expert consensus. A weak source on a strong claim gets the weaker label.
Browse all 1238 ingredients — grouped by what they do, each with whatever evidence we can cite.
This page is public so a shared ingredient card always has its sources behind it — and so you can check them without an account.
Want more like this?
Every evidence-based flag cites its source, Drop tells you when your routine is complete, and it helps you simplify — instead of selling you more. The app launches on iOS and Android in October 2026. Rate my routine works today at /rate — no sign-in.