murphyStyrene/Acrylates Copolymer
molecular structure · PubChem
AKA: Styrene acrylate copolymer, Acrylic resin
Synthetic
Occlusive
Clean
OriginSynthesized from styrene and acrylic monomers, both petroleum-derived chemical compounds. Produced through free radical polymerization of styrene and acrylate monomers to form a copolymer.
Styrene/Acrylates Copolymer is a polymer of Styrene and a monomer consisting of Acrylic Acid, Methacrylic Acid or one of their simple esters.
CAS #
27306-39-4, 25034-86-0, 25085-34-1, 9010-92-8
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.
Opacifying
Creates Protective Barrier
Adds Opacity
Creates protective layer
Creates creamy opacity
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
Restricted By
CIR Safety Findings
Not a Sensitizer
4 studies / 4 not sensitizing (CIR 673)
Mixed Eye Irritation Results
5 studies / 2 irritating / 3 not irritating / reactions minimal to weak (CIR 673)
Mixed Skin Irritation Results
6 studies / 1 irritating / 5 not irritating / reactions weak (CIR 673)
Concentration Guide
Leave-on0.028–35%
Rinse-off0.04–12%
0%50%100%
Reg. limit 0.06%
CIR reported use · 2014 survey
EU/SCCS limit: 0.06% in cosmetic products. Opinion: SCCS/1595/18
Regulatory Agencies
Verified Jun 2026
Data: CosIng · EWG · CIR