Bis-Stearoxydimethylsilane

Bis-Stearoxydimethylsilane molecular structure
molecular structure · PubChem
AKA: Dimethyldistearoxysilane, Dimethylbis(octadecyloxy)silane
Plant-Derived
Skin Conditioner
Not Clean
Bis-Stearoxydimethylsilane is the silicon compound
Formula
C38H80O2Si
Mol. Weight
597.10
CAS #
29043-70-7
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.
Locks in moisture
Traditional Use
A synthetic silicone compound developed for the cosmetics industry. Created to function as a water-resistant emollient and skin protectant in modern skincare and sun care products.
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: PubChem · CosIng · EWG · CIR