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Ammonium Styrene/Acrylates Copolymer
AKA “Styrene acrylate copolymer ammonium salt”
Synthetic
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Ingredient Facts
Ammonium styrene/acrylates copolymer
AKA: Styrene acrylate copolymer ammonium salt
Synthetic · Film Forming | Opacifying | Skin Conditioning - Emollient | Astringent · EWG: 2
Plant-Derived
Emollient
Occlusive
Astringent
Skin Conditioner
Synthetic
Clean
Ethenylbenzene, polymer with 2-propenoic acid, 2-methyl-2-propenoic acid and/or one of their simple esters, ammonium salts Science: Functions: Film Forming, Opacifying Safety Ratings: CIR: Safe as used
Form
Liquid
Plant-Derived
Synthetic. Produced from styrene and acrylic acid monomers, belonging to the synthetic polymer chemical family. Synthesized through free-radical polymerization of the monomers, then neutralized with ammonia to form ammonium salts.
Function
Film Forming | Opacifying | Skin Conditioning - Emollient | Astringent
Benefits
Creates Protective Barrier
Adds Opacity
Reduces Inflammation
Locks In Moisture
Creates protective layer
Creates creamy opacity
Traditional Use
A synthetic polymer developed in the mid-20th century. Used in cosmetics as a film-former and thickening agent with no traditional precedent.
Skin Types
all-skin-types, gentle
Best For
Target
General
Melanin-Rich Skin
Suitable
Pregnancy Safe
Yes
EWG Score2
CIR Safety Findings
ewg-2, medical-approval, pregnancy-nursing-safe, all-shades-safe, Not a Sensitizer
Regulatory Status
USA✔ permitted
EU⚠ restricted
JAPAN⚠ restricted
CANADA⚠ restricted
Verified Feb 2026
Data: CosIng · EWG · CIR