Hydrogen Dimethicone/Octyl Silsesquioxane Copolymer

AKA: Silicone Copolymer, Hybrid Silicone

Synthetic

Silicone

Not Clean

OriginDerived from silicone chemistry, specifically organosiloxane polymers and silsesquioxane compounds. Synthesized through hydrolytic condensation of silane precursors, followed by copolymerization with dimethicone segments.

Hydrogen Dimethicone/Octyl Silsesquioxane Copolymer is a cosmetic ingredient used as binding. Assessed as safe by the CIR.

CAS #

-

Form

Liquid

State

Solid

Skin Types

●all-skin-types

Best For

General

Pregnancy & Breastfeeding Safe

Yes

Functions

Binding

Holds Formula Together

Brightens Skin

Antioxidant Protection

Reduces Inflammation

Holds ingredients together

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

CIR

Safe as used

Pregnancy

Yes

Restricted By

Whole Foods Premium Body Care Beauty Heroes

Concentration Guide

CIR's newest survey reports no concentration of use.

CIR · 2016 survey

Regulatory Status

USA✔ permitted

EU⚠ restricted

JAPAN⚠ restricted

CANADA⚠ restricted

Regulatory Agencies

EWG CIR FDA EU COSING Health Canada

Verified Jun 2026

Data: CosIng · EWG · CIR