murphyPoly(Methoxy PEG-9 Methacrylate)
molecular structure · PubChem
Synthetic
Humectant
Occlusive
Skin Conditioner
Not Clean
OriginDerived from methoxy polyethylene glycol and methacrylic acid, both petroleum-based synthetic chemicals. Synthesized through free radical polymerization of methacrylate monomers containing methoxy PEG-9 units.
Poly(Methoxy PEG-9 Methacrylate) is the polymer
Formula
C18H17N3O3
Mol. Weight
323.3
CAS #
96478-13-6
Form
Powder
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Yes
Functions
Film Forming
Creates a physical seal on skin to lock moisture in and keep irritants out. The "slugging" ingredient — barrier protection.
Humectant
A moisture magnet. Pulls water from the air and deeper skin layers up to the surface to keep skin plump and hydrated.
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-assessed1 review →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
EWG
4
CIR
Safe as used
Pregnancy
Yes
Concentration Guide
CIR lists it as not reported to be in use.
CIR · report published 2018
Regulatory Agencies
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR