Science
Mechanism of Action
This ingredient acts as a surfactant by significantly lowering the surface tension between immiscible substances, facilitating the formation and stabilization of emulsions. It effectively helps oil and water to mix, allowing otherwise insoluble ingredients to dissolve within a solvent. Furthermore, its cleansing action aids in dislodging and rinsing away oil and dirt from the skin and hair.
Research
Clinical Evidence
High confidenceN/A
Key findings
- 01 The CIR Expert Panel found PEG-3 Sorbitan Stearate to be non-irritating and non-sensitizing on human skin at concentrations up to 25%.
Transparency
Dusting Analysis
The Formula
Formulation
Stability
While specific pH data for PEG-3 Sorbitan Stearate is not provided, related PEG Stearates show stability to heat, acids, and bases, with a 1% aqueous solution pH between 5.0 and 7.5. The non-ethoxylated counterpart, Sorbitan Stearate, typically requires incorporation into the hot oil phase at 80°C (176°F) and is often combined with a high HLB emulsifier for stable oil-in-water emulsions.
Conflicts
- Should not be applied to damaged skin.
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel deemed PEG-3 Sorbitan Stearate safe for cosmetic use up to 25% concentration. A crucial caveat notes its unsuitability for application on damaged skin. Minor traces of 1,4-dioxane, a by-product of the ethoxylation process, may be present but can be minimized through purification steps.
Your Skin
Skin Compatibility
Our Assessment
Verdict
PEG-3 Sorbitan Stearate is a valuable formulating agent, providing essential emulsifying and cleansing functions with a low risk of irritation at concentrations up to 25%.
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