Science
Mechanism of Action
This ingredient operates fundamentally as a surfactant, effectively lowering surface tension to facilitate the removal of lipids and debris from the skin's surface during cleansing. Concurrently, it functions as an emulsifier, critical for creating and maintaining stable blends of oil and water phases within cosmetic emulsions. Its derivation from castor oil, rich in ricinoleic acid, suggests an ancillary capacity to support skin moisturization and conditioning.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
Aqueous solutions containing sodium salts of fatty acids, including Sodium Castorate, are inherently alkaline (pH > 7.0), indicating robust stability in elevated pH environments.
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel deemed Sodium Castorate safe for cosmetic application, provided it is formulated to avoid irritation and sensitization. The safety assessment did not specify a maximum concentration for Sodium Castorate directly; however, its precursor, Castor Oil, is documented at concentrations up to 77.8% in certain moisturizing products. It is recognized by the FDA Global Substance Registration System (GSRS).
Your Skin
Skin Compatibility
Our Assessment
Verdict
Sodium Castorate is a valuable surfactant and emulsifier derived from castor oil, offering effective cleansing and formulation stability with a low risk of irritation when properly formulated.
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References
Sources