PEG-9 Dimethicone

PEG-9 Dimethicone molecular structure
molecular structure · PubChem
AKA: PEGylated Silicone
Synthetic
Skin Conditioner
Hair Care
Silicone
Not Clean
OriginDerived from dimethicone (a silicone polymer) and ethylene oxide as starting materials. Synthesized through ethoxylation, where ethylene oxide is added to dimethicone backbone to create polyethylene glycol chains.
Silicones and siloxanes, dimethyl, hydropoly(oxy-1,2-ethanediyl methyl, trimethylsilyl terminated (9 mol EO average molar ratio)
Form
Liquid
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Yes
Functions
Hair Conditioning
A catch-all term for ingredients that improve how skin looks and feels — softer, smoother, more supple. The workhorse behind most moisturizers.
Skin Conditioning
A catch-all term for ingredients that improve how skin looks and feels — softer, smoother, more supple. The workhorse behind most moisturizers.
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
4
CIR
Safe as used
Pregnancy
Yes
Concentration Guide
Leave-on0.0016–5.6%
Rinse-off0.5–1.5%
0%50%100%
CIR reported use · report published 2014
Regulatory Status
USA✔ permitted
EU⚠ restricted
JAPAN⚠ restricted
CANADA⚠ restricted
Verified Jun 2026
Data: CosIng · EWG · CIR