Styrene/Butadiene Copolymer
molecular structure · PubChem
AKA: Synthetic rubber, Styrene-butadiene polymer
Synthetic
Clean
OriginDerived from petroleum-based hydrocarbons, specifically styrene and butadiene monomers from crude oil refining. Synthesized through free radical polymerization, where styrene and butadiene monomers are chemically linked into long polymer chains.
Benzene, ethenyl-, polymer with 1,3-butadiene
CAS #
9003-55-8
Form
Liquid
State
Solid
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Caution
Functions
Opacifying
Adds Opacity
Creates creamy opacity
The paper trail
🔬Peer-reviewednone on file
⚖️Regulatory1 listing →
🛡️Safety-assessed2 reviews →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
EWG
1
CIR
Safe as used
Pregnancy
Caution
Restricted By
Concentration Guide
CIR's newest survey reports no concentration of use.
CIR · 2014 survey
Regulatory Agencies
Verified Jun 2026
Data: CosIng · EWG · CIR
murphy