Science
Mechanism of Action
This ingredient primarily acts by reducing the interfacial tension between oil and water phases, thereby forming and stabilizing emulsions within a product. As a surfactant, it lowers the overall surface tension of the cosmetic formulation, promoting even application and efficient distribution across the skin.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
STEARETH-11 is a functional ingredient critical for product formulation stability and texture, rather than a direct skin active, and is not typically 'dusted' in marketing.
The Formula
Formulation
Stability
STEARETH-11 exhibits excellent stability across a broad pH range, showing resistance to both acidic and alkaline conditions. Its high water solubility allows for easy incorporation into various formulations, contributing to superior long-term emulsion stability and desirable product texture.
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel concluded that alkyl PEG ethers, including STEARETH-11, are safe in their current uses and concentrations, provided they are formulated to be non-irritating. This determination was reaffirmed in 2006. While a specific maximum concentration for STEARETH-11 was not established, related Steareth ingredients like Steareth-2 and Steareth-10 demonstrated only mild irritation at concentrations up to 60%, and Steareth-20 was nontoxic dermally at 4%. The FDA also permits related fatty alcohols in specific indirect food additive applications.
Your Skin
Skin Compatibility
Our Assessment
Verdict
STEARETH-11 is a valuable formulation aid, ensuring product stability and uniform application across various cosmetic types, with a low risk of irritation and broad skin compatibility.
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References
Sources