murphyPEG-Cetyl Stearyl Diether
molecular structure · PubChem
AKA: PEGylated Fatty Alcohol Ether
Plant-Derived
Emollient
Emulsifier
Not Clean
OriginDerived from cetyl and stearyl alcohols, typically sourced from coconut or palm oil fatty acids. Produced through ethoxylation, where ethylene oxide is chemically bonded to the alcohol compounds.
PEG-Cetyl Stearyl Diether is a cosmetic ingredient. Assessed as safe by the CIR.
CAS #
9002-92-0; 68439-50-9; 5274-68-0; 9004-95-9; 9005-00-9; 4536-30-5; 3055-93-4; 3055-94-5; 3055-95-6
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Yes
Functions
Emollient
Fills in the tiny cracks between skin cells to make everything feel smooth and soft. The "silky finish" ingredient.
Emulsifying
Forces oil and water to stay mixed instead of separating into layers. The unsung hero holding your lotion together.
The paper trail
🔬Peer-reviewednone on file
⚖️Regulatory0 listings
🛡️Safety-assessed1 review →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
EWG
4
CIR
Safe as used
Pregnancy
Yes
Concentration Guide
CIR lists it as not reported to be in use.
CIR · report published 2012
Regulatory Agencies
Verified Jun 2026
Data: CosIng · EWG · CIR