PEG-3 Dimethicone

PEG-3 Dimethicone molecular structure
molecular structure · PubChem
AKA: Polyethylene Glycol 3 Dimethicone, PEG 3 Dimethicone
Synthetic
Skin Conditioner
Hair Care
Silicone
Clean
OriginDerived from dimethicone siloxane polymers, a synthetic silicone compound chemically engineered for cosmetic use. Synthesized through ethoxylation, where polyethylene glycol chains are added to dimethicone via catalytic reaction.
Silicones and siloxanes, dimethyl, hydropoly(oxy-1,2-ethanediyl methyl, trimethylsilyl terminated (3 mol EO average molar ratio)
CAS #
67548-78-7
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-assessed3 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 Skin Irritant
1 study / 1 not irritating (CIR 664)
Not a Sensitizer
3 studies / 3 not sensitizing (CIR 664)
Concentration Guide
Leave-on0.5–5%
Rinse-offNot reported
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