Oleyl Stearate

AKA: 17673-50-6, Octadecanoic acid, (9Z)-9-octadecen-1-yl ester, Cis-9-Octadecenyl Stearate, 9Z-octadecenyl octadecanoate, 9-octadecenyl ester, Stearic acid
Plant-Derived
Emollient
Skin Conditioner
Not Clean
OriginTypically derived from coconut, palm kernel, or soybean oils through hydrogenation of fatty acids. Synthesized by esterification of oleyl alcohol with stearic acid using catalytic methods.
(Z)-Octadec-9-enyl octadecanoate
Formula
C36H70O2
Mol. Weight
534.90
CAS #
17673-50-6
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
Concentration Guide
CIR lists it as not reported to be in use.
CIR · report published 2015
Regulatory Status
USA✔ permitted
EU⚠ restricted
JAPAN⚠ restricted
CANADA⚠ restricted
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR