murphyHydrogenated Styrene/Butadiene Copolymer
molecular structure · PubChem
AKA: Synthetic Polymer
Synthetic
Occlusive
Clean
OriginSynthesized from styrene and butadiene monomers, which are petroleum-derived hydrocarbons belonging to the synthetic polymer family. Produced through catalytic hydrogenation of the styrene/butadiene copolymer backbone to increase stability and film-forming properties.
Ethenylbenzene, polymer with 1,3-butadiene, hydrogenated
CAS #
66070-58-4
Form
Liquid
State
Solid
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Yes
Functions
Film Forming
Creates a physical seal on skin to lock moisture in and keep irritants out. The "slugging" ingredient — barrier protection.
Viscosity Controlling
Creates Protective Barrier
Controls Viscosity
Anti-Aging Benefits
Antioxidant Protection
Reduces Inflammation
Creates protective layer
Controls product thickness
The paper trail
🔬Peer-reviewed1 paper →
⚖️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
Yes
Restricted By
Concentration Guide
Leave-on0.33–18.7%
Rinse-off2%
0%50%100%
CIR reported use · 2014 survey
Regulatory Agencies
Verified Jun 2026
Data: CosIng · EWG · CIR