Styrene/Acrylates/Ammonium Methacrylate Copolymer
molecular structure · PubChem
AKA: Film-forming polymer, Styrene acrylate copolymer
Synthetic
Occlusive
Clean
Styrene/Acrylate/Ammonium Methacrylate Copolymer
Form
Liquid
State
Solid
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
Traditional Use
A synthetic polymer developed in the 20th century for cosmetic use as a film-forming and thickening agent. Created through modern polymer chemistry without traditional historical precedent.
EWG
2
CIR
Safe as used
Pregnancy
Yes
Restricted By
CIR Safety Findings
Not a Sensitizer
medical-approval
all-shades-safe
Regulatory Agencies
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Yes
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.
Verified Jun 2026
Data: CosIng · EWG · CIR