Potassium Isostearate

AKA: Isooctadecanoic acid, Potassium salt, Potassium salt (1:1), 66469-15-6, Potassium 16-methylheptadecanoate, 68413-46-7
Plant-Derived
Cleanser
Clean
OriginTypically derived from coconut, palm kernel, or soybean oils as starting materials. Produced through saponification of isostearic acid followed by potassium salt formation.
Potassium salt of isostearic acid
Formula
C18H35KO2
Mol. Weight
322.60
CAS #
68413-46-7
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 Surfactant
Removes Impurities
The paper trail
🔬Peer-reviewed1 paper →
⚖️Regulatory1 listing →
🛡️Safety-assessed2 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
Leave-onNot reported
Rinse-off1.6–3%
0%50%100%
CIR reported use · 2016 survey
Regulatory Status
USA✔ permitted
EU⚠ restricted
JAPAN⚠ restricted
CANADA⚠ restricted
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR