Butylene/Ethylene/Styrene Copolymer
AKA “Butylene Ethylene Styrene Copolymer, B/E/S Copolymer”
Ingredient
Ingredient Facts
Butylene/ethylene/styrene copolymer
AKA: Butylene Ethylene Styrene Copolymer, B/E/S Copolymer
Ingredient · Viscosity Controlling · EWG: 2
Synthetic
Clean
Butylene/Ethylene/Styrene Copolymer is a polymer of butylene and ethylene and styrene monomers terminated by hydrogenation
CAS #
68648-89-5
Form
Liquid
State
Solid
See origin →
Functions
Viscosity Controlling
Controls Viscosity
Traditional Use
A synthetic polymer developed in the mid-20th century for use in cosmetics as a film-former and texture enhancer. Created to provide water resistance and long-lasting wear in makeup products.
Skin Types
●all-skin-types, gentle
Best For
General
Pregnancy & Breastfeeding Safe
Yes
EWG
2
CIR
Safe as used
Pregnancy
Yes
Restricted By
CIR Safety Findings
ewg-2
medical-approval
pregnancy-nursing-safe
all-shades-safe
Regulatory Agencies
Butylene/Ethylene/Styrene Copolymer
European Commission
EU Cosmetic Ingredient Database (CosIng)
Hydrogenated Butylene/Ethylene/Styrene Copolymer
European Commission
EU Cosmetic Ingredient Database (CosIng)
Butylene/Ethylene/Styrene Copolymer
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
Hydrogenated Butylene/Ethylene/Styrene Copolymer
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
Verified Jun 2026
Data: CosIng · EWG · CIR