Sodium Stearyl Fumarate

Sodium Stearyl Fumarate molecular structure
molecular structure · PubChem
AKA: 4070-80-8, Sodium monostearyl fumarate, SODIUM OCTADECYL FUMARATE, Sodium 2-octadecylfumarate
Plant-Derived
Clean
Sodium octadecyl fumarate
Formula
C22H39NaO4
Mol. Weight
390.50
CAS #
4070-80-8
Form
Powder
Functions
Bulking
Anti-Inflammatory
Antimicrobial
Fights Acne
Adds volume
Traditional Use
Synthetic conditioning agent created in the mid-20th century by combining stearic acid with fumaric acid. Developed to improve texture and conditioning properties in skincare and cosmetic formulations.
EWG
1
CIR
Safe as used
Pregnancy
Yes
CIR Safety Findings
Non-Comedogenic
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-reviewed1 paper →
⚖️Regulatory1 listing →
🛡️Safety-assessed2 reviews →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR