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Dimethiconol/Silsesquioxane Copolymer
AKA “
Silicone Copolymer
”
Synthetic
🦆
❤️
👻
Ingredient Facts
Dimethiconol/silsesquioxane copolymer
AKA: Silicone Copolymer
Synthetic · Hair Conditioning · EWG: 4
WHAT IS IT?
Synthetic
Skin Conditioner
Hair Care
Synthetic
Clean
A lightweight conditioning agent that smooths and softens both hair and skin while creating a silky feel and improving texture.
CAS #
68554-67-6
Form
Liquid
State
Solid
See origin →
WHAT'S IT DO?
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
Melanin-Rich Skin
Suitable
Pregnancy & Breastfeeding Safe
Yes
IS IT SAFE?
EWG
4
CIR
Insufficient
Pregnancy
Yes
CIR Safety Findings
Not a Sensitizer
medical-approval
all-shades-safe
Regulatory Status
USA
under review
EU
⚠ restricted
JAPAN
⚠ restricted
CANADA
⚠ restricted
Regulatory Agencies
EWG
CIR
FDA
EU COSING
Health Canada
WHAT'S THE PROOF?
Dimethiconol/Silsesquioxane Copolymer
European Commission
EU Cosmetic Ingredient Database (CosIng)
→
Dimethiconol/Silsesquioxane Copolymer
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
→
Verified Feb 2026
Data: CosIng · EWG · CIR