Science
Mechanism of Action
Sodium Caprate enhances permeability by transiently affecting tight junctions between cells, allowing for increased paracellular transport of molecules, a mechanism primarily observed in intestinal linings. It also contributes to increased membrane fluidity and possesses amphiphilic characteristics, enabling it to form micelles and liquid crystalline phases. These properties underscore its capabilities as a surfactant and emulsifying agent.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
Sodium Caprate is not typically subject to 'dusting' concerns as it primarily functions as a formulation excipient (surfactant, emulsifier, permeation enhancer) rather than a standalone active ingredient requiring specific skin concentration for direct benefits.
The Formula
Formulation
Stability
Sodium Caprate forms micelles in aqueous solutions under alkaline conditions. Lowering the pH to approximately 6.5-8 generates vesicles, with potential co-formation of micelles and vesicles around pH 7.5. It retains detergent capacity when ionized at pH values 1-3 units above its pKa (~5), with a 10% solution typically exhibiting a pH range of 9.0-11.0.
Synergies
- May synergize with active ingredients by enhancing their topical delivery and absorption.
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel deemed fatty acids and fatty acid salts, including Sodium Caprate, safe for cosmetic use provided they are formulated to be non-irritating and non-sensitizing. While no specific maximum concentration for cosmetic use is provided, its safety is contingent on proper formulation. It holds approval as a food additive in the US and EU, with no daily intake limits established by the WHO and US FDA. BioSpectra's Bio Excipient Grade (Sodium Decanoate) is supported by an FDA Type IV drug master file.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Sodium Caprate is a valuable functional ingredient for formulations aiming to enhance the delivery of other actives or requiring effective surfactant and emulsifying properties, provided it is formulated to be non-irritating and non-sensitizing.
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References
Sources