Science
Mechanism of Action
As an anionic surfactant, Laureth-1 Phosphate functions by lowering the surface tension of liquids, facilitating the homogeneous mixing of substances that typically do not combine, such as oil and water. This mechanism allows it to efficiently lift and remove dirt, oils, and impurities from both skin and hair. Furthermore, it stabilizes cosmetic emulsions by maintaining the cohesion between oil and water phases, and contributes to the formation of a fine, uniform foam, ensuring thorough yet gentle cleansing without stripping the skin.
Research
Clinical Evidence
Insufficient-data confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
This ingredient exhibits broad pH stability, with related phosphate derivatives demonstrating stability across both acidic and alkaline conditions. It can be utilized in an unneutralized state, offering formulators flexibility in pH adjustment. Its enhanced water solubility at lower temperatures makes it particularly suitable for diverse liquid cleaning formulations.
Synergies
- Compatible with non-ionic surfactants
- Compatible with anionic surfactants
- Compatible with cationic surfactants
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel concluded that Laureth ingredients, including Laureth-1, are safe for use in cosmetic products when formulated to be non-irritating. For the broader group of Alkyl Phosphates (which encompasses Laureth-1 Phosphate), maximum concentrations of 8.7% are deemed safe for rinse-off applications (e.g., skin cleaning products) and 3.8% for leave-on applications (e.g., face and neck preparations). While developmental, reproductive toxicity, and mutagenicity studies for Laureth ingredients have yielded negative results, the potential for skin irritation necessitates careful formulation practices. Trace amounts of 1,4-dioxane, a by-product of the ethoxylation process, may be present but can be controlled through purification steps. It is important to note that a specific standalone assessment for Laureth-1 Phosphate by an industry panel was not identified in some databases, differentiating it from reviews of broader ingredient classes.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Laureth-1 Phosphate is a valuable and mild anionic surfactant and emulsifier, highly effective in a variety of cleansing and emulsified formulations, suitable for all skin types when expertly formulated to ensure non-irritating properties.
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