Styrene/Butadiene Copolymer
AKA “Synthetic rubber, Styrene-butadiene polymer”
Ingredient
Ingredient Facts
Styrene/butadiene copolymer
AKA: Synthetic rubber, Styrene-butadiene polymer
Ingredient · Opacifying · EWG: 1
Synthetic
Clean
Benzene, ethenyl-, polymer with 1,3-butadiene
CAS #
9003-55-8
Form
Liquid
State
Solid
See origin →
Functions
Opacifying
Adds Opacity
Creates creamy opacity
Traditional Use
A synthetic rubber polymer developed in the mid-20th century, originally for industrial applications before being adapted for use in cosmetics as a film-forming and conditioning agent.
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Caution
EWG
1
CIR
Safe as used
Pregnancy
Caution
Restricted By
CIR Safety Findings
medical-approval
all-shades-safe
Regulatory Agencies
Hydrogenated Styrene/Butadiene Copolymer
European Commission
EU Cosmetic Ingredient Database (CosIng)
Styrene/Butadiene Copolymer
European Commission
EU Cosmetic Ingredient Database (CosIng)
Hydrogenated Styrene/Butadiene Copolymer
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
Styrene/Butadiene Copolymer
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
Verified Jun 2026
Data: CosIng · EWG · CIR