Sodium Isostearate
AKA “Sodium isooctadecanoate, UNII-8WF2JE0F41, EINECS 264-754-4, ISOOCTADECANOIC ACID, SODIUM SALT (1:1), RefChem:183954, DTXCID80136957, SODIUM ISOSTEARATE [INCI]”
Synthetic
Ingredient Facts
Sodium isostearate
AKA: Sodium isooctadecanoate, UNII-8WF2JE0F41, EINECS 264-754-4, ISOOCTADECANOIC ACID, SODIUM SALT (1:1), RefChem:183954, DTXCID80136957, SODIUM ISOSTEARATE [INCI]
Synthetic · Cleansing · EWG: 4
Plant-Derived Synthetic
Cleanser
Emulsifier
Plant Oil
Synthetic
Clean
A natural plant-derived cleanser that gently removes dirt and oil while helping blend ingredients together for a smooth, unified texture.
Formula
C18H35NaO2
Mol. Weight
306.50
CAS #
64248-79-9
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
Makes oil and water mix so dirt, makeup, and sunscreen can actually be washed away. The reason your face wash foams.
Emulsifying
Forces oil and water to stay mixed instead of separating into layers. The unsung hero holding your lotion together.
Surfactant Cleansing
Surfactant Emulsifying
Anti-Inflammatory
Antimicrobial
Fights Acne
Removes dirt and impurities
Lifts away dirt and oil
Mixes oil and water
Traditional Use
A synthetic emulsifier derived from isostearic acid, developed in the mid-20th century for cosmetic formulations. Created to improve product stability and texture without traditional historical origins.
Skin Types
●all-skin-types
Best For
General
Melanin-Rich Skin
Suitable
Pregnancy & Breastfeeding Safe
Yes
Verified Feb 2026
Data: PubChem · CosIng · EWG · CIR