Stearoxymethicone/Dimethicone Copolymer

Stearoxymethicone/Dimethicone Copolymer 1
Stearoxymethicone/Dimethicone Copolymer 2
Stearoxymethicone/Dimethicone Copolymer 3
Stearoxymethicone/Dimethicone Copolymer 4
AKA: Silicone polymer, Stearyl silicone copolymer
Plant-Derived
Emollient
Skin Conditioner
Silicone
Clean
Silicones and siloxanes, dimethyl, octadecyloxy methyl, trimethylsilyl terminated
Form
Liquid
Functions
Skin Conditioning
A catch-all term for ingredients that improve how skin looks and feels — softer, smoother, more supple. The workhorse behind most moisturizers.
Emollient
Fills in the tiny cracks between skin cells to make everything feel smooth and soft. The "silky finish" ingredient.
Viscosity Controlling
Locks In Moisture
Traditional Use
A synthetic copolymer combining stearoxy and dimethicone chemistry, developed in the late 20th century for advanced cosmetic formulations. Engineered to provide enhanced conditioning and film-forming properties.
EWG
2
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
Dryness
Pregnancy & Breastfeeding Safe
Yes
The paper trail
🔬Peer-reviewednone on file
⚖️Regulatory1 listing →
🛡️Safety-assessed3 reviews →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
Verified Jun 2026
Data: CosIng · EWG · CIR