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Trimethoxycaprylylsilane
AKA “3069-40-7, Trimethoxyoctylsilane, Octyltrimethoxysilane, Silane, trimethoxyoctyl-, FZ07E4LW2M, EINECS 221-338-7, DTXSID80863094, EC 221-338-7, RefChem:899730”
Ingredient
Ingredient Facts
Trimethoxycaprylylsilane
AKA: 3069-40-7, Trimethoxyoctylsilane, Octyltrimethoxysilane, Trimethoxyoctyl-, FZ07E4LW2M, EINECS 221-338-7, DTXSID80863094, EC 221-338-7, RefChem:899730
Ingredient · Binding · EWG: 1
Synthetic
Silicone
Plant Oil
Clean
Trimethoxyoctylsilane
Formula
C11H26O3Si
Mol. Weight
234.41
CAS #
3069-40-7
Form
Powder
State
Liquid; Dry Powder
See origin →
Functions
Binding
Smoothing
Smooths skin texture
Traditional Use
A synthetic silane coupling agent developed for cosmetics in the late 20th century. Created to improve adhesion and water resistance in cosmetic film-forming products.
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Yes
EWG
1
CIR
Safe as used
Pregnancy
Yes
CIR Safety Findings
Not a Sensitizer
medical-approval
all-shades-safe
Regulatory Status
USA✔ permitted
EU⚠ restricted
JAPAN⚠ restricted
CANADA⚠ restricted
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR