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Dimethiconol/Silsesquioxane Copolymer
AKA “Silicone Copolymer”
Skin Conditioning
Ingredient Facts
Dimethiconol/silsesquioxane copolymer
AKA: Silicone Copolymer
Skin Conditioning · Hair Conditioning · EWG: 1
Synthetic
Skin Conditioner
Hair Care
Clean
Siloxanes and silicones, di-Me, polymers with Me silsesquioxanes, hydroxy-terminated
CAS #
68554-67-6
Form
Liquid
State
Solid
See origin →
Functions
Hair Conditioning
A catch-all term for ingredients that improve how skin looks and feels — softer, smoother, more supple. The workhorse behind most moisturizers.
Skin Conditioning
A catch-all term for ingredients that improve how skin looks and feels — softer, smoother, more supple. The workhorse behind most moisturizers.
Locks in moisture
Traditional Use
A modern silicone copolymer developed for cosmetic formulations to improve texture, water-resistance, and durability in makeup and skincare products.
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Yes
EWG
1
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
Verified Jun 2026
Data: CosIng · EWG · CIR