Sorbitan Sesquistearate

AKA: Octadecanoate (2:3), 51938-44-4, Stearic acid, Sorbitan ester (3:2), NIKKOL SS-15V, SORBITAN SESQUISTEARATE [INCI]
Plant-Derived
Cleanser
Emulsifier
Clean
OriginDerived from sorbitol (a sugar alcohol) and stearic acid, typically sourced from vegetable oils. Produced through esterification of sorbitol with stearic acid under controlled heat and catalytic conditions.
Sorbitan, octadecanoate (2:3)
Formula
C54H108O19
Mol. Weight
1061.40
CAS #
51938-44-4
Skin Types
●all-skin-types
Best For
General
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.
Surfactant Emulsifying
Improves Elasticity
Moisturizing
Boosts Collagen
Mixes oil and water
The paper trail
🔬Peer-reviewednone on file
⚖️Regulatory1 listing →
🛡️Safety-assessed4 reviews →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
EWG
1
CIR
Safe as used
Pregnancy
Yes
Concentration Guide
CIR lists it as not reported to be in use.
CIR · report published 2019
Regulatory Status
USA✔ permitted
EU⚠ restricted
JAPAN⚠ restricted
CANADA⚠ restricted
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR