Science
Mechanism of Action
This ingredient functions principally by stabilizing the pH of cosmetic products, preventing potential irritation from extreme acidity or alkalinity. As a chelating agent, it binds with metal ions, mitigating their negative impact on product stability and appearance. It also acts as an emulsifier, facilitating the harmonious blend of oil and water phases, contributing to a smooth texture. Furthermore, its inherent alkalinity provides deep cleansing action, effectively breaking down fats and impurities within formulations.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
Trisodium Phosphate is a strongly alkaline compound, typically yielding a pH of 12 for a 1% solution. It is stable under ambient conditions but is hygroscopic, meaning it readily absorbs moisture from the air, which can lead to it forming a hard, caked consistency.
Conflicts
- strong acids
- mild steel (when wet)
- brass (when wet)
- painted surfaces (can damage at high concentrations)
- glass (can leave a filmy residue at high concentrations)
- ceramic tile glazing (can etch if left in contact too long)
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel has deemed Trisodium Phosphate safe for use in cosmetics when properly formulated to be non-irritating. The U.S. FDA also recognizes it as Generally Recognized As Safe (GRAS) for direct food additive applications, underscoring its general safety profile under controlled conditions.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Trisodium Phosphate is a valuable ingredient for cosmetic formulation stability and cleansing efficacy, deemed safe for use when precisely formulated to avoid irritation.
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References
Sources