murphyPEG/PPG-20/29 Dimethicone
molecular structure · PubChem
AKA: Silicone Glycol Copolymer, Dimethicone Copolyol
Synthetic
Cleanser
Emulsifier
Silicone
Not Clean
OriginDerived from dimethicone siloxane polymers modified with polyethylene glycol and polypropylene glycol chains. Synthesized by sequential ethoxylation and propoxylation reactions applied to the dimethicone backbone.
Siloxanes and silicones, dimethyl, 3-hydroxypropyl methyl, ethoxylated, propoxylated (20 mol EO, 29 mol PO average molar ratio)
CAS #
-
Form
Liquid
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Yes
Functions
Emulsifying
Forces oil and water to stay mixed instead of separating into layers. The unsung hero holding your lotion together.
Emulsifier
Mixes Oil & Water
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
Restricted By
Concentration Guide
CIR lists it as not reported to be in use.
CIR · report published 2014
Regulatory Agencies
Verified Jun 2026
Data: CosIng · EWG · CIR