murphyTrimethoxycaprylylsilane
AKA: 3069-40-7, Trimethoxyoctylsilane, Octyltrimethoxysilane
Synthetic
Clean
OriginDerived from plant-based fatty alcohols, typically sourced from coconut or palm kernel oils. Synthesized through silylation, bonding silicone compounds to the fatty alcohol backbone via chemical reaction.
Trimethoxyoctylsilane
Formula
C11H26O3Si
Mol. Weight
234.41
CAS #
3069-40-7
Form
Powder
State
Liquid; Dry Powder
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Yes
Functions
Binding
Smoothing
Smooths skin texture
The paper trail
🔬Peer-reviewednone on file
⚖️Regulatory1 listing →
🛡️Safety-assessed2 reviews →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
EWG
1
CIR
Safe as used
Pregnancy
Yes
CIR Safety Findings
Not an Eye Irritant
1 study / 1 not irritating (CIR 716)
Skin Irritant in Testing
1 study / 1 irritating (CIR 716)
Concentration Guide
Leave-on0.1–0.77%
Rinse-offNot reported
0%50%100%
CIR reported use · 2015 survey
Regulatory Agencies
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR