Hydrogen Dimethicone/Octyl Silsesquioxane Copolymer
AKA “Silicone Copolymer, Hybrid Silicone”
Synthetic
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Ingredient Facts
Hydrogen dimethicone/octyl silsesquioxane copolymer
AKA: Silicone Copolymer, Hybrid Silicone
Synthetic · Skin Conditioning | Film Forming | Emollient · EWG: 4
Plant-Derived
Emollient
Occlusive
Skin Conditioner
Silicone
Synthetic
Clean
Science: Functions: Binding Safety Ratings: CIR: Safe as used
CAS #
-
Form
Liquid
Plant-Derived
Synthetic. Derived from silicone chemistry, specifically organosiloxane polymers and silsesquioxane compounds. Synthesized through hydrolytic condensation of silane precursors, followed by copolymerization with dimethicone segments.
Function
Skin Conditioning | Film Forming | Emollient
Benefits
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
Target
General
Melanin-Rich Skin
Suitable
Pregnancy Safe
Yes
Restricted By
EWG Score4
CIR Safety Findings
medical-approval, all-shades-safe, Not a Sensitizer
Regulatory Agencies
Verified Feb 2026
Data: CosIng · EWG · CIR