Octyl Stearate

Octyl Stearate 1
AKA: Octyl octadecanoate, Octadecanoic acid, Octyl ester, Stearic acid, N-octyl stearate, AI3-31618, NJLUB OS
Plant-Derived
Emulsifier
Skin Conditioner
Not Clean
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
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
Traditional Use
A synthetic ester developed as an emollient for cosmetics. Used in skincare and makeup formulations to provide smooth texture and improve the spreadability of products.
EWG
4
CIR
Safe as used
Pregnancy
Yes
CIR Safety Findings
Not a Sensitizer
medical-approval
all-shades-safe
Regulatory Status
USA✔ permitted
EU⚠ restricted
JAPAN⚠ restricted
CANADA⚠ restricted
Skin Types
●all-skin-types
Best For
Dryness
Pregnancy & Breastfeeding Safe
Yes
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