PEG-8 Dimethicone

PEG-8 Dimethicone molecular structure
molecular structure · PubChem
AKA: Dimethicone PEG-8, Polyethylene Glycol 8 Dimethicone
Synthetic
Skin Conditioner
Hair Care
Silicone
Clean
OriginDerived from dimethicone, a siloxane polymer, combined with polyethylene glycol chains. Synthesized through ethoxylation of dimethicone to add hydrophilic polyoxyethylene groups.
Silicones and siloxanes, dimethyl, hydropoly(oxy-1,2-ethanediyl)methyl, trimethylsilyl terminated (8 mol EO average molar ratio)
CAS #
67674-67-7
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 an Eye Irritant
1 study / 1 not irritating (CIR 664)
Concentration Guide
Leave-on0.024–5.6%
Rinse-off0.38–2%
0%50%100%
CIR reported use · 2014 survey
Regulatory Status
USA✔ permitted
EU⚠ restricted
JAPAN⚠ restricted
CANADA⚠ restricted
Verified Jun 2026
Data: CosIng · EWG · CIR