Science
Mechanism of Action
On the skin, LAURETH-21 acts as a surfactant, enabling water to effectively mix with and lift oily residues and dirt for thorough rinsing. As an emulsifier, it stabilizes formulations by preventing the separation of immiscible liquids like oil and water. Furthermore, its solubilizing properties assist in dispersing other cosmetic ingredients that would typically be insoluble in the chosen solvent.
Research
Clinical Evidence
Insufficient-data confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
LAURETH-21 demonstrates robust stability across a wide pH range, maintaining its integrity in both acidic and alkaline environments.
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel has deemed Laureth ingredients, including LAURETH-21, safe for cosmetic use when formulated to be non-irritating. There is a documented potential for skin irritation, particularly with elevated concentrations or extended exposure. As a polyethylene glycol (PEG) compound, LAURETH-21 may contain trace impurities like 1,4-dioxane, a known carcinogen; however, reputable manufacturers implement rigorous purification processes to minimize these contaminants below detectable or harmful levels.
Your Skin
Skin Compatibility
Our Assessment
Verdict
LAURETH-21 is a valuable functional ingredient for formulation stability and cleansing, with safety assured when incorporated within non-irritating concentrations by manufacturers who control for potential impurities.
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References
Sources