Science
Mechanism of Action
Laureth-3 acts as a versatile formulating agent by reducing the interfacial tension between unlike phases. As an emulsifier, it facilitates the homogeneous mixing of water and oil components, forming stable emulsions. In its capacity as a surfactant, it lowers surface tension, allowing for the efficient dispersion and removal of oils, sebum, and dirt from the skin's surface. Furthermore, it functions as a solubilizer for oils within aqueous systems, contributing to a milky product consistency, and can also contribute to product viscosity as a thickening agent.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
Laureth-3 is effective within an optimal pH range of 5.0 to 6.5, suitable for acidic, neutral, and diluted alkaline environments. A 1% aqueous solution is typically slightly acidic to neutral. With an HLB value of 7.8-8, it primarily facilitates water-in-oil (W/O) emulsions. While generally stable, turbidities may develop during extended storage, which can be reversed by gently heating the product to 40°C and stirring.
Safety
Safety Profile
The CIR Expert Panel deems Laureth ingredients, including Laureth-3, safe for cosmetic use when formulated to be non-irritating. Toxicity studies, including developmental, reproductive, and mutagenicity assessments, have yielded negative results. Cosmetic-grade Laureth-3 may contain trace amounts of 1,4-dioxane, a by-product of the ethoxylation process, but purification steps can effectively control its levels.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Laureth-3 is a valuable formulation ingredient, crucial for achieving stable textures and effective cleansing in cosmetic products, though its use requires careful formulation to ensure non-irritancy.
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References
Sources