Stearyl Triethoxysilane
What Stearyl Triethoxysilane is & what it does
Stearyl Triethoxysilane is an organosilicon (silane) compound that combines a long stearyl alkyl chain with a triethoxysilane group. It is generally used as a surface treatment for powders and pigments, especially mineral particles like titanium dioxide and iron oxides, bonding to the particle surface to make it more water-repellent and easier to disperse in oils. This coating improves the feel, spreadability, and water resistance of color cosmetics and mineral-based sun care. It is a functional processing ingredient rather than a skincare active.
What is Stearyl Triethoxysilane?
It is an organosilicon (silane) compound that pairs a long stearyl chain with a triethoxysilane group. It is generally used to surface-treat powders and pigments.
What does Stearyl Triethoxysilane do in cosmetics?
It coats mineral particles such as titanium dioxide and iron oxides to make them more water-repellent and easier to disperse in oils. This improves the feel, spreadability, and water resistance of color cosmetics and mineral sun care.
Is Stearyl Triethoxysilane safe?
It is generally considered safe as used, functioning as a bound surface coating on particles rather than a free active. It is a processing ingredient with a long history of use in pigment treatment.
Sunscreens with Stearyl Triethoxysilane
We rate 5 sunscreens that contain it:
-
bareMinerals Prime Time BB Primer-cream
84/100
-
bareMinerals Prime Time BB Primer-cream Daily Defence SPF 30
84/100
-
Sarah Chapman Skin Insurance Spf 50+
83/100
-
Kate Somerville Hydrakate Illuminating Sunscreen SPF 50+ Drops
71/100
-
Sarah Chapman Skin Insurance SPF 30
54/100