Hydrogenated Butylene/Ethylene/Styrene Copolymer
molecular structure · PubChem
AKA: Hydrogenated Polymer, Styrenic Copolymer
Synthetic
Emollient
Skin Conditioner
Clean
Ethenylbenzene, polymer with butene and ethene, hydrogenated
Form
Liquid
State
Solid
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Yes
Functions
Skin Conditioning
A catch-all term for ingredients that improve how skin looks and feels — softer, smoother, more supple. The workhorse behind most moisturizers.
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
Restricted By
Concentration Guide
Leave-onNot reported
Rinse-off10%
0%50%100%
CIR reported use · 2014 survey
Regulatory Agencies
Verified Jun 2026
Data: CosIng · EWG · CIR
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