Diisostearyl Fumarate

Diisostearyl Fumarate molecular structure
molecular structure · PubChem
AKA: Diisostearyl maleate, 112385-09-8, Diisooctadecyl ester, 1, 4-diisooctadecyl ester, Bis(16-methylheptadecyl) (Z)-but-2-enedioate
Plant-Derived
Emollient
Skin Conditioner
Clean
2-Butenedioic acid (2E), bis(16-methylheptadecyl) ester
Formula
C40H76O4
Mol. Weight
621.00
CAS #
112385-09-8, 113431-53-1, 680206-25-1
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.
Locks In Moisture
Traditional Use
A synthetic ester created in the late 20th century. Used in cosmetics as an emollient and film-forming agent that provides conditioning and wear-resistance to 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
Dryness
Pregnancy & Breastfeeding Safe
Yes
The paper trail
🔬Peer-reviewednone on file
⚖️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