Isostearyl Isostearate
AKA: Isooctadecyl isooctadecanoate, Isooctadecanoic acid, Isooctadecyl ester, CRODAMOL ISIS, SABODERM IS, DUB ISIS, DERMOL 1818
Plant-Derived
Emollient
Skin Conditioner
Plant Oil
Clean
The CIR Expert Panel concluded that the alkyl esters, listed subsequently, are safe in the present practices of use and concentration described in this safety assessment when formulated to be non-irritating.
Family
Not applicable (synthetic ester)
Formula
C36H72O2
Mol. Weight
537.00
CAS #
41669-30-1
Functions
Binding
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 mid-20th century as an emollient and texture enhancer. Developed to provide a lightweight, non-greasy alternative to natural oils in cosmetic products while improving formula stability.
Skin Types
●all-skin-types, gentle
Best For
Dryness
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