Science
Mechanism of Action
This compound primarily functions by reducing the surface tension in cosmetic mixtures, which aids in the uniform distribution of products as a surfactant. As an emulsifier, it stabilizes oil-in-water emulsions by modifying interfacial tension. Notably, related alkyl phosphates are considered analogous to natural skin phospholipid structures, contributing to the ingredient's mildness and favorable skin compatibility. It also plays a role in stabilizing water-resistant sun-care formulations and can enhance the SPF efficacy of UV filters.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
The potassium salt form of this ingredient is readily soluble in tepid water and also dissolves effectively in the heated oil phase, making it a versatile anionic emulsifier. It performs particularly well in aqueous systems with higher oil loads due to improved ionization. The ingredient maintains robust stability across a broad pH range, specifically between 5 and 9.
Conflicts
- cationic ingredients (needs careful checking)
- metal salts (needs careful checking)
- alkaline earth metals (needs careful checking)
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel has concluded that Potassium C11-15 Alkyl Phosphate, along with other alkyl phosphates, is safe for use in cosmetic practices when formulated to be non-irritating. The highest reported concentration of use for similar alkyl phosphates in leave-on products, such as mascara, is 8.3%.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Potassium C11-15 Alkyl Phosphate is a valuable, stable emulsifier and surfactant, recognized for its skin compatibility and ability to enhance formulation integrity across diverse cosmetic applications.
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