Science
Mechanism of Action
This ingredient operates by significantly reducing the interfacial tension between immiscible liquids, such as oil and water, thus enabling the formation and stabilization of fine emulsions. As a surfactant, it facilitates the mixing of water with oils and dirt, allowing for effective cleansing and rinsing. Furthermore, as a polyethylene glycol (PEG) derivative, it forms hydrogen bonds with water molecules, thereby delivering long-term hydration to the skin and potentially minimizing water evaporation from the surface.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
As a derivative of polyethylene glycol, PEG-5 Sorbitan Isostearate exhibits good skin tolerance and a wide spectrum of solubility properties. While no specific optimal pH range is available for this particular compound, related PEGylated sorbitan esters, such as PEG-20 Sorbitan Monostearate, maintain stability within a pH range of 5 to 7.
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel has determined that PEG-5 Sorbitan Isostearate is safe for use in cosmetic products when formulated to be non-irritating, with concentrations up to 25% deemed acceptable. A critical consideration is its restriction from use on damaged skin. Furthermore, manufacturers must control for minute quantities of 1,4-dioxane, a potential byproduct of the ethoxylation process, through stringent purification methods to ensure product safety and compliance.
Your Skin
Skin Compatibility
Our Assessment
Verdict
PEG-5 Sorbitan Isostearate is a valuable ingredient, prized for its ability to stabilize emulsions, aid in gentle cleansing, and provide hydrating benefits across diverse skin types when formulated responsibly.
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References
Sources