Propylene Glycol Diisostearate

AKA: 68958-54-3, Isooctadecanoic acid, 1-methyl-1, 2-ethanediyl ester, 1'-(1-methyl-1, 2-ethanediyl) ester, 1-Methyl-1, 2-ethanediyl diisooctadecanoate, Propane-1, 2-diyl bis(16-methylheptadecanoate), 2-(16-methylheptadecanoyloxy)propyl 16-methylheptadecanoate
Plant-Derived
Emollient
Skin Conditioner
Not Clean
OriginTypically derived from coconut, palm kernel, or soybean oils as the natural starting material. Synthesized by esterification of propylene glycol with isostearic acid, a saturated fatty acid derivative.
1-Methyl-1,2-ethanediyl diisooctadecanoate
Formula
C39H76O4
Mol. Weight
609.00
CAS #
68958-54-3
Form
Liquid
Skin Types
●all-skin-types
Best For
Dryness
Pregnancy & Breastfeeding Safe
Yes
Functions
Emollient
Fills in the tiny cracks between skin cells to make everything feel smooth and soft. The "silky finish" ingredient.
Locks In Moisture
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.
EWG
4
CIR
Safe as used
Pregnancy
Yes
Restricted By
Concentration Guide
CIR lists it as not reported to be in use.
CIR · report published 2014
Regulatory Agencies
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR
murphy