Triethoxycaprylylsilane
AKA “Triethoxyoctylsilane, Triethoxy(octyl)silane, Octyltriethoxysilane, Octyl(triethoxy)silane, Dynasylan OCTEO, Prosil 9202, Silquest A 137, Prosil 9234”
Synthetic
Ingredient Facts
Triethoxycaprylylsilane
AKA: Triethoxyoctylsilane, Triethoxy(octyl)silane, Octyltriethoxysilane, Octyl(triethoxy)silane, Dynasylan OCTEO, Prosil 9202, Silquest A 137, Prosil 9234
Synthetic · Film Forming · EWG: 4
Synthetic
Occlusive
Plant Oil
Synthetic
Clean
Helps bind formula ingredients together, keeping your product smooth and stable so it applies evenly every time.
Formula
C14H32O3Si
Mol. Weight
276.49
CAS #
2943-75-1
Form
Powder
State
Dry Powder; Liquid; Dry Powder, Liquid
See origin →
Functions
Film Forming
Creates a physical seal on skin to lock moisture in and keep irritants out. The "slugging" ingredient — barrier protection.
Binder
Holds Formula Together
Holds ingredients together
Traditional Use
A modern silicone-derived coupling agent developed in the late 20th century for cosmetic use. Functions as a water-repellent and film-forming agent, part of the broader silicone polymer family adopted by cosmetics in the 1950s onward.
Skin Types
●all-skin-types
Best For
General
Melanin-Rich Skin
Suitable
Verified Feb 2026
Data: PubChem · CosIng · EWG · CIR