Hydrogenated Ethylene/Propylene/Styrene Copolymer

Hydrogenated Ethylene/Propylene/Styrene Copolymer molecular structure
molecular structure · PubChem
AKA: Hydrogenated Polymer, HEPS Copolymer
Synthetic
Emollient
Skin Conditioner
Clean
OriginA copolymer synthesized from ethylene, propylene, and styrene monomers derived from petroleum hydrocarbons. The copolymer is produced through catalytic hydrogenation to saturate double bonds and increase stability.
Ethenylbenzene, polymer with propene and ethene, hydrogenated
Form
Liquid
State
Solid
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Yes
Functions
Light Stabilizer
Emollient
Fills in the tiny cracks between skin cells to make everything feel smooth and soft. The "silky finish" ingredient.
Viscosity Controlling
Locks In Moisture
The paper trail
🔬Peer-reviewednone on file
⚖️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
Concentration Guide
Leave-on1.5–4.4%
Rinse-offNot reported
0%50%100%
CIR reported use · 2014 survey
Regulatory Status
USA✔ permitted
EU⚠ restricted
JAPAN⚠ restricted
CANADA⚠ restricted
Verified Jun 2026
Data: CosIng · EWG · CIR