Science
Mechanism of Action
Operating as an anionic surfactant, Sodium Ceteth-4 Phosphate functions by reducing the surface tension of substances. This action enables immiscible liquids like oil and water to mix smoothly, forming stable emulsions. As a cleansing agent, it aids in dispersing and suspending oils and dirt within water, allowing for their efficient removal from the skin and hair.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
This ingredient demonstrates robust stability across a broad pH range. Related alkyl phosphates, such as Triceteareth-4 Phosphate, maintain integrity between pH 3 and 9. It is soluble in both polar and non-polar solvents, with water solubility generally increasing with the number of ethylene oxide units.
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel has concluded that Sodium Ceteth-4 Phosphate, as part of the broader Ceteth ingredient group, is safe under current practices of use. While generally considered non-irritating, there is a theoretical likelihood of irritation, particularly at higher concentrations (e.g., 5-100% for related Ceteth compounds) or when combined with other potentially problematic ingredients. Lower concentrations (e.g., 3.0% Ceteth-2) were observed to be non-irritating to intact skin. No specific SCCS opinion or FDA status for topical use has been identified.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Sodium Ceteth-4 Phosphate is a valuable formulation aid, primarily functioning as an emulsifier and cleansing agent, recognized as safe for use in a wide range of cosmetic applications when properly formulated.
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References
Sources