murphyOleth-30
molecular structure · PubChem
AKA: Triethoxyoctylsilane, Triethoxy(octyl)silane, 2943-75-1, Octyltriethoxysilane, Triethoxycaprylylsilane, Octyl(triethoxy)silane, Dynasylan OCTEO, Prosil 9202, Silquest A 137, Prosil 9234
Synthetic
Cleanser
Emulsifier
Not Clean
OriginDerived from oleic acid and ethylene oxide, belonging to the polyethoxylated fatty alcohol ester chemical family. Synthesized through ethoxylation of oleyl alcohol, adding approximately 30 ethylene oxide units per molecule.
Poly(oxy-1,2-ethanediyl), .alpha.-9-(Z)-octadecenyl-.omega.-hydroxy (30 mol EO average molar ratio)
Formula
C14H32O3Si
Mol. Weight
276.49
CAS #
9004-98-2
Form
Liquid
State
Dry Powder; Liquid; Dry Powder, Liquid
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Yes
Functions
Cleansing
Makes oil and water mix so dirt, makeup, and sunscreen can actually be washed away. The reason your face wash foams.
Cleansing
Makes oil and water mix so dirt, makeup, and sunscreen can actually be washed away. The reason your face wash foams.
Emulsifying
Forces oil and water to stay mixed instead of separating into layers. The unsung hero holding your lotion together.
Removes Impurities
Cleansing Surfactant
Emulsifier
Mixes Oil & Water
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
4
CIR
Safe as used
Pregnancy
Yes
Concentration Guide
Leave-onNot reported
Rinse-off3–8%
0%50%100%
CIR reported use · 2010 survey
Regulatory Agencies
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR