Methylstyrene/Vinyltoluene Copolymer
AKA “Copolymer resin
Synthetic
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Ingredient Facts
Methylstyrene/vinyltoluene copolymer
AKA: Copolymer resin
Synthetic · Viscosity Controlling | Film Forming | Skin Conditioning - Emollient | Smoothing · EWG: 4
Plant-Derived
Emollient
Occlusive
Skin Conditioner
Synthetic
Clean
Helps create a smooth, lightweight texture that feels comfortable on skin without being greasy or heavy.
CAS #
9017-27-0
Form
Liquid
Plant-Derived
Synthetic. Produced from the polymerization of methylstyrene and vinyltoluene monomers derived from petroleum-based hydrocarbons. Synthesized through free radical polymerization, combining the two vinyl monomers into a long-chain copolymer.
Function
Viscosity Controlling | Film Forming | Skin Conditioning - Emollient | Smoothing
Benefits
Controls Viscosity
Traditional Use
A synthetic polymer developed in the mid-20th century for use in cosmetics, particularly in hair styling products and nail polish. Created to provide film-forming and holding properties.
Skin Types
all-skin-types
Best For
Target
General
Melanin-Rich Skin
Suitable
EWG Score4
CIR Safety Findings
medical-approval, all-shades-safe
Regulatory Status
USAunder review
EUrestricted
JAPANrestricted
CANADArestricted
Verified Feb 2026
Data: CosIng · EWG · CIR