murphyOctyl Stearate
AKA: Octyl octadecanoate, Octadecanoic acid, Octyl ester, Stearic acid, N-octyl stearate, AI3-31618, NJLUB OS
Plant-Derived
Emulsifier
Skin Conditioner
Not Clean
OriginOctyl stearate is synthesized from stearic acid and octanol, both derived from animal fats or vegetable oils. It is produced through esterification, a chemical reaction combining the carboxylic acid and alcohol under catalytic conditions.
Octyl Stearate is a cosmetic ingredient. Also known as Octyl octadecanoate. Assessed as safe by the CIR.
Formula
C26H52O2
Mol. Weight
396.70
CAS #
109-36-4
Form
Liquid
Skin Types
●all-skin-types
Best For
Dryness
Pregnancy & Breastfeeding Safe
Yes
Functions
Emulsifying
Forces oil and water to stay mixed instead of separating into layers. The unsung hero holding your lotion together.
Skin Conditioning
A catch-all term for ingredients that improve how skin looks and feels — softer, smoother, more supple. The workhorse behind most moisturizers.
Anti-Inflammatory
Moisturizing
Fights Acne
The paper trail
🔬Peer-reviewed1 paper →
⚖️Regulatory0 listings
🛡️Safety-assessed1 review →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR