Sodium Hydroxystearate

AKA: 13329-67-4, Octadecanoic acid, Monosodium salt, 12-Hydroxystearic acid, Sodium salt, Monosodium 12-hydroxystearate, Sodium salt (1:1)
Plant-Derived
Cleanser
Not Clean
OriginDerived from plant-based oils such as coconut, palm kernel, or soybean oils through hydrogenation. Produced by saponification of hydroxystearic acid with sodium hydroxide or sodium carbonate.
Sodium salt of Hydroxystearic Acid
Formula
C18H35NaO3
Mol. Weight
322.50
CAS #
13329-67-4
Form
Liquid
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Yes
Functions
Cleansing
Makes oil and water mix so dirt, makeup, and sunscreen can actually be washed away. The reason your face wash foams.
Cleansing
Makes oil and water mix so dirt, makeup, and sunscreen can actually be washed away. The reason your face wash foams.
Surfactant Cleansing
Anti-Inflammatory
Antimicrobial
Fights Acne
Removes dirt and impurities
Lifts away dirt and oil
The paper trail
🔬Peer-reviewed1 paper →
⚖️Regulatory1 listing →
🛡️Safety-assessed1 review →
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 2019
Regulatory Status
USA✔ permitted
EU⚠ restricted
JAPAN⚠ restricted
CANADA⚠ restricted
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR