Hydrogenated Styrene/Butadiene Copolymer
AKA “Synthetic Polymer”
Synthetic
Ingredient Facts
Hydrogenated styrene/butadiene copolymer
AKA: Synthetic Polymer
Synthetic · Emollient · EWG: 4
Synthetic
Emollient
Occlusive
Skin Conditioner
Synthetic
Clean
Creates a smooth, lightweight texture that glides effortlessly on skin while maintaining the perfect consistency.
CAS #
66070-58-4
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.
Viscosity Controlling
Emollient
Fills in the tiny cracks between skin cells to make everything feel smooth and soft. The "silky finish" ingredient.
Smoothing
Creates Protective Barrier
Controls Viscosity
Anti-Aging Benefits
Antioxidant Protection
Reduces Inflammation
Creates protective layer
Controls product thickness
Traditional Use
This is a synthetic polymer developed in the mid-20th century as part of modern polymer chemistry. It is used in cosmetics as a film-former and texture modifier, with no historical or traditional use.
Skin Types
●all-skin-types
Best For
General
Melanin-Rich Skin
Suitable
Pregnancy & Breastfeeding Safe
Yes
EWG
4
CIR
Safe
Pregnancy
Yes
Restricted By
CIR Safety Findings
medical-approval
all-shades-safe
Regulatory Agencies
Verified Feb 2026
Data: CosIng · EWG · CIR