murphyAcrylates/Octylacrylamide Copolymer
molecular structure · PubChem
AKA: Acrylic copolymer, Film-forming polymer
Synthetic
Occlusive
Clean
OriginSynthesized from acrylic acid and octylacrylamide monomers, which are petroleum-derived organic compounds. Produced through free radical polymerization, combining the monomers into a cross-linked copolymer film-forming agent.
2-Propenoic acid, 2-methyl-, 2-methylpropylester, polymer with 2-propenoic acid and N-(1,1,3,3-tetramethylbutyl)-2-propenamide
CAS #
129702-02-9
Form
Liquid
State
Solid
Skin Types
●all-skin-types, gentle
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.
Hair Fixing
Creates Protective Barrier
Creates protective layer
Holds hair in place
The paper trail
🔬Peer-reviewed1 paper →
⚖️Regulatory1 listing →
🛡️Safety-assessed2 reviews →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
EWG
1
CIR
Safe as used
Pregnancy
Yes
CIR Safety Findings
Not a Sensitizer
2 studies / 2 not sensitizing (CIR 843)
Mixed Skin Irritation Results
2 studies / 1 irritating / 1 not irritating / reactions mild (CIR 843)
Mixed Eye Irritation Results
2 studies / 1 irritating / 1 not irritating / reactions mild (CIR 843)
Concentration Guide
Leave-on0.00097–7%
Rinse-off4.9–19.4%
0%50%100%
CIR reported use · 2020 survey
Regulatory Agencies
Verified Jun 2026
Data: CosIng · EWG · CIR