Science
Mechanism of Action
As a surfactant, Laureth-20 acts by reducing the interfacial tension between liquids, enabling the creation and stabilization of emulsions. Its molecular structure possesses both lipophilic and hydrophilic characteristics, allowing it to bridge oil and water. This dual affinity supports its roles as an effective emulsifier, a cleansing agent that helps lift fats and impurities from skin, and a solubilizer for ingredients challenging to integrate into solutions.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
As a polyethylene glycol derivative, Laureth-20’s physical state transitions from liquid to solid wax-like with increasing molecular weight; specifically, PEGs up to 600 g/mol are liquid, up to 1,000 g/mol are wax-like, and above 4,000 g/mol are solid. Crucially, any formulation incorporating Laureth-20 must be designed to mitigate potential irritation.
Conflicts
- Not to be used in concentrations that cause irritation
Safety
Safety Profile
The CIR Expert Panel deems Laureth ingredients, including Laureth-20, safe for cosmetic use when carefully formulated to be non-irritating, as these compounds possess the potential for irritation if not properly handled. While small amounts of 1,4-dioxane, an ethoxylation by-product, may be present, these are controlled via purification steps. Studies on developmental, reproductive toxicity, and mutagenicity have yielded negative results. Regulations in Europe and the general provisions of US law allow its use, with the FDA participating in CIR assessments.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Laureth-20 is a valuable functional ingredient for improving product texture and cleansing, contingent on precise formulation to ensure non-irritancy.
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References
Sources