Isostearyl Acetate
molecular structure · PubChem
AKA: Acetic acid, Isostearyl ester, 1026979-42-9
Plant-Derived
Emollient
Skin Conditioner
Plant Oil
Not Clean
Acetic acid, 16-methyl-heptadecyl ester
Formula
C20H40O2
Mol. Weight
312.50
CAS #
1026979-42-9
Form
Liquid
Functions
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 developed as an emollient and conditioning agent. Created in the mid-20th century to replace natural oils with a stable, lightweight alternative in cosmetics.
Skin Types
●all-skin-types
Best For
Dryness
Pregnancy & Breastfeeding Safe
Yes
The paper trail
🔬Peer-reviewed1 paper →
⚖️Regulatory1 listing →
🛡️Safety-assessed0 reviews
Counts, not a verdict. A listing isn't a study. The trail, you decide.
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR