Styrene/Acrylates Copolymer
AKA “Styrene acrylate copolymer, acrylic resin”
Ingredient
Ingredient Facts
Styrene/acrylates copolymer
AKA: Styrene acrylate copolymer, Acrylic resin
Ingredient · Film Forming · EWG: 2
Synthetic
Occlusive
Clean
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
See origin →
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 mid-20th century through petrochemical synthesis. Used in cosmetics as a film-forming agent and thickener, particularly in hair care and styling products.
Skin Types
●all-skin-types, gentle
Best For
General
Pregnancy & Breastfeeding Safe
Yes
EWG
2
CIR
Safe as used
Pregnancy
Yes
Restricted By
CIR Safety Findings
Not a Sensitizer
ewg-2
medical-approval
pregnancy-nursing-safe
all-shades-safe
Concentration Guide
0.06%
0%0%
Reg. Limit
EU/SCCS limit: 0.06% in cosmetic products. Opinion: SCCS/1595/18
Regulatory Agencies
Ammonium Styrene/Acrylates Copolymer
European Commission
EU Cosmetic Ingredient Database (CosIng)
Sodium Styrene/Acrylates Copolymer
European Commission
EU Cosmetic Ingredient Database (CosIng)
Styrene/Acrylates Copolymer
European Commission
EU Cosmetic Ingredient Database (CosIng)
Ammonium Styrene/Acrylates Copolymer
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
Sodium Styrene/Acrylates Copolymer
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
Styrene/Acrylates Copolymer
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
Verified Jun 2026
Data: CosIng · EWG · CIR