Hydrogen Dimethicone/Octyl Silsesquioxane Copolymer

Hydrogen Dimethicone/Octyl Silsesquioxane Copolymer 1
Hydrogen Dimethicone/Octyl Silsesquioxane Copolymer 2
Hydrogen Dimethicone/Octyl Silsesquioxane Copolymer 3
Hydrogen Dimethicone/Octyl Silsesquioxane Copolymer 4
AKA: Silicone Copolymer, Hybrid Silicone
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
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.
EWG
4
CIR
Safe as used
Pregnancy
Yes
CIR Safety Findings
Not a Sensitizer
medical-approval
all-shades-safe
Regulatory Status
USA✔ permitted
EU⚠ restricted
JAPAN⚠ restricted
CANADA⚠ restricted
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Yes
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.
Verified Jun 2026
Data: CosIng · EWG · CIR