Science
Mechanism of Action
This ingredient operates by significantly reducing the surface tension at the interface of immiscible liquids, such as oil and water, thereby forming and stabilizing emulsions. Its amphiphilic nature also facilitates the solubilization of other ingredients that are typically insoluble in specific solvents and aids in the cleansing process by enabling water to effectively mix with and remove oily impurities and dirt from skin and hair.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
As a non-ionic surfactant within the polysorbate class, PEG-2 Sorbitan Isostearate exhibits high stability across a broad pH range, including both acidic and alkaline environments.
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel concluded that PEG-2 Sorbitan Isostearate is safe for cosmetic use provided formulations are nonirritating and not applied to damaged skin. Trace amounts of 1,4-dioxane, a by-product of ethoxylation, may be present and require strict control through purification. Related ingredients, such as Polysorbate 60 and PEG-20 Sorbitan Isostearate, have been noted for potential mild to moderate skin irritation and moderate allergy/immunotoxicity in sensitive individuals or those with pre-existing allergies.
Your Skin
Skin Compatibility
Our Assessment
Verdict
PEG-2 Sorbitan Isostearate is an effective functional ingredient for emulsion stability and solubilization, but requires careful formulation to ensure non-irritancy, especially for sensitive or damaged skin, due to noted restrictions and potential for irritation.
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