Isostearyl Isostearate
AKA “Isooctadecyl isooctadecanoate, Isooctadecanoic acid, isooctadecyl ester, UNII-IV0Z586Z4Y, IV0Z586Z4Y, CRODAMOL ISIS, SABODERM IS, DUB ISIS, EINECS 255-485-3, DERMOL 1818
Emollient
Ingredient Facts
Isostearyl isostearate
AKA: Isooctadecyl isooctadecanoate, Isooctadecanoic acid, Isooctadecyl ester, UNII-IV0Z586Z4Y, IV0Z586Z4Y, CRODAMOL ISIS, SABODERM IS, DUB ISIS, EINECS 255-485-3, DERMOL 1818
Emollient · Emollient · EWG: 1
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
See origin →
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
EWG
1
CIR
Safe as used
Pregnancy
Yes
CIR Safety Findings
Not a Sensitizer
ewg-1
medical-approval
pregnancy-nursing-safe
all-shades-safe
Regulatory Status
USApermitted
EUrestricted
JAPANrestricted
CANADArestricted
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR