Hydrogenated Styrene/Isoprene Copolymer
AKA “Hydrogenated Styrene/Isoprene Copolymer”
Synthetic
Ingredient Facts
Hydrogenated styrene/isoprene copolymer
Synthetic · Emollient · EWG: 1
Synthetic
Emollient
Occlusive
Skin Conditioner
Synthetic
Clean
A synthetic texture enhancer that gives products a smooth, luxurious feel and ensures consistent application every time.
CAS #
68648-89-5
State
Solid
See origin →
Functions
Viscosity Controlling
Film Forming
Creates a physical seal on skin to lock moisture in and keep irritants out. The "slugging" ingredient — barrier protection.
Emollient
Fills in the tiny cracks between skin cells to make everything feel smooth and soft. The "silky finish" ingredient.
Smoothing
Film Former
Binder
Viscosity Controlling Agent
Opacifying Agent
Anti-Aging Benefits
Antioxidant Protection
Reduces Inflammation
Controls Viscosity
Traditional Use
A synthetic polymer developed in the late 20th century for use as a film-forming and conditioning agent in cosmetics and personal care products.
Skin Types
●all-skin-types, gentle
Best For
General
Melanin-Rich Skin
Suitable
Pregnancy & Breastfeeding Safe
Yes
EWG
1
CIR
Safe
Pregnancy
Yes
Restricted By
CIR Safety Findings
ewg-1
medical-approval
pregnancy-nursing-safe
all-shades-safe
Regulatory Agencies
Verified Feb 2026
Data: CosIng · EWG · CIR