murphyPEG-9 Polydimethylsiloxyethyl Dimethicone
molecular structure · PubChem
AKA: PEGylated Siloxane Silicone
Synthetic
Cleanser
Emulsifier
Skin Conditioner
Silicone
Clean
OriginSynthesized from dimethicone siloxane polymers and ethylene glycol or polyethylene glycol units. Produced through ethoxylation, wherein polyethylene glycol chains are chemically attached to the silicone backbone.
Siloxanes and silicones, dimethyl, 3-(hydropoly(oxy-1,2-ethanediyl)propyl methyl, 2-(trimethylsilyloxydimethylsilyl)ethyl methyl, trimethyl terminated (9 mol EO average molar ratio)
Form
Liquid
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Yes
Functions
Skin Conditioning
A catch-all term for ingredients that improve how skin looks and feels — softer, smoother, more supple. The workhorse behind most moisturizers.
Emulsifying
Forces oil and water to stay mixed instead of separating into layers. The unsung hero holding your lotion together.
Locks in moisture
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
2
CIR
Safe as used
Pregnancy
Yes
CIR Safety Findings
Not a Sensitizer
1 study / 1 not sensitizing (CIR 664)
Eye Irritant in Testing
1 study / 1 irritating / reactions slight (CIR 664)
Mixed Skin Irritation Results
3 studies / 2 irritating / 1 not irritating / reactions slight (CIR 664)
Concentration Guide
Leave-on0.3–4%
Rinse-offNot reported
0%50%100%
CIR reported use · report published 2014
Regulatory Agencies
Verified Jun 2026
Data: CosIng · EWG · CIR