Potassium Isostearate
AKA “Isooctadecanoic acid, potassium salt, EH37ZN9J0J, potassium salt (1:1), 66469-15-6, RefChem:1096542, DTXSID6042070, 266-369-7, Potassium 16-methylheptadecanoate, 68413-46-7
Surfactant
Ingredient Facts
Potassium isostearate
AKA: Isooctadecanoic acid, Potassium salt, EH37ZN9J0J, Potassium salt (1:1), 66469-15-6, RefChem:1096542, DTXSID6042070, 266-369-7, Potassium 16-methylheptadecanoate, 68413-46-7
Surfactant · Cleansing · EWG: 1
Plant-Derived
Cleanser
Plant Oil
Clean
Potassium salt of isostearic acid
Formula
C18H35KO2
Mol. Weight
322.60
CAS #
68413-46-7
Form
Liquid
See origin →
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
Traditional Use
A synthetic surfactant derived from isostearic acid combined with potassium. Created in the modern era for use as a cleansing and emulsifying ingredient in cosmetics.
Skin Types
all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Yes
EWG
1
CIR
Safe as used
Pregnancy
Yes
CIR Safety Findings
Not a Sensitizer
medical-approval
all-shades-safe
Regulatory Status
USApermitted
EUrestricted
JAPANrestricted
CANADArestricted
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR