PEG-9 Polydimethylsiloxyethyl Dimethicone
AKA: PEGylated Siloxane Silicone
Synthetic
Cleanser
Emulsifier
Skin Conditioner
Silicone
Clean
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
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
Traditional Use
A complex hybrid silicone emulsifier developed in the late 20th century combining polyethylene glycol and silicone polymers. Created to stabilize silicone-based ingredients in water-based formulations for improved skin feel and conditioning.
EWG
2
CIR
Safe as used
Pregnancy
Yes
CIR Safety Findings
Not a Sensitizer
medical-approval
all-shades-safe
Regulatory Agencies
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Yes
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.
Verified Jun 2026
Data: CosIng · EWG · CIR