Polystyrene/Hydrogenated Polyisopentene Copolymer

AKA: Polystyrene Copolymer, Synthetic Polymer
Synthetic
Not Clean
OriginA copolymer created by chemically linking polystyrene and hydrogenated polyisopentene, both petroleum-derived synthetic polymers. Synthesized through catalytic hydrogenation of polyisopentene followed by copolymerization with polystyrene monomers.
Copolymer of polystyrene and hydrogenated polyisopentene
CAS #
-
Form
Liquid
State
Solid
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Yes
Functions
Light Stabilizer
Viscosity Controlling
Shields from UV damage
The paper trail
🔬Peer-reviewednone on file
⚖️Regulatory1 listing →
🛡️Safety-assessed1 review →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
EWG
4
CIR
Safe as used
Pregnancy
Yes
Concentration Guide
Leave-on0.015–1.2%
Rinse-off0.0002%
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