Sodium Castorate
AKA “Sodium Castorate, Castor Oil Derivative”
Surfactant
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Ingredient Facts
Sodium castorate
AKA: Castor Oil Derivative
Surfactant · Cleansing · EWG: 1
Synthetic
Cleanser
Emulsifier
Plant Oil
Clean
Fatty acids, castor-oil, sodium salts
CAS #
8013-06-7
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.
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
Lifts away dirt and oil
Mixes oil and water
Traditional Use
A saponified derivative of castor oil, which has been used for medicinal and cosmetic purposes since ancient Egypt. The sodium salt form was developed in the 20th century as an emulsifier for modern skincare products.
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Yes
Verified Jun 2026
Data: CosIng · EWG · CIR