Hydrogen Dimethicone/Octyl Silsesquioxane Copolymer
AKA “Silicone Copolymer, Hybrid Silicone”
Ingredient
Ingredient Facts
Hydrogen dimethicone/octyl silsesquioxane copolymer
AKA: Silicone Copolymer, Hybrid Silicone
Ingredient · Binding · EWG: 4
Synthetic
Silicone
Not Clean
Hydrogen Dimethicone/Octyl Silsesquioxane Copolymer is a cosmetic ingredient used as binding. Assessed as safe by the CIR.
CAS #
-
Form
Liquid
State
Solid
See origin →
Functions
Binding
Holds Formula Together
Brightens Skin
Antioxidant Protection
Reduces Inflammation
Holds ingredients together
Traditional Use
Created in the late 20th century as a modern silicone-based polymer for cosmetics. Designed to provide light, silky texture and water resistance in skincare and makeup formulations.
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Yes
EWG
4
CIR
Safe as used
Pregnancy
Yes
Restricted By
CIR Safety Findings
Not a Sensitizer
medical-approval
all-shades-safe
Regulatory Agencies
Verified Jun 2026
Data: CosIng · EWG · CIR