Science
Mechanism of Action
This ingredient acts as a powerful surfactant, effectively lowering the surface tension between oil and water components. This action enables it to encapsulate and lift away dirt, excess sebum, and other impurities from the skin's surface, facilitating a thorough cleanse. It also serves as an emulsifier and foam booster.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
Similar to Sodium Laureth Sulfate (SLES), SODIUM LAURETH-40 SULFATE demonstrates consistent stability across varying pH levels, and in the presence of metal ions and oxidizing agents. Optimal storage conditions are between 15°C and 25°C, away from direct sunlight and moisture to maintain its integrity.
Conflicts
- cationic surfactants
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel deems related sulfated ethoxylated alcohols safe when formulated to be non-irritating, though acknowledging data gaps regarding specific use and concentration for some ingredients. For SODIUM LAURETH-40 SULFATE, EWG identifies risk assessment method deficiencies and data gaps, basing safety assessment on reported 'as used' concentrations. Significant contamination concerns exist for impurities like ethylene oxide and 1,4-dioxane. While Sodium Laureth Sulfate (a broader category) is not a sensitizer, it is recognized as a dermal and ocular irritant, with irritation potential escalating with increased concentration.
Your Skin
Skin Compatibility
Our Assessment
Verdict
While effective as a cleansing surfactant, the significant data gaps identified by CIR and EWG, coupled with high contamination concerns regarding ethylene oxide and 1,4-dioxane, render its use questionable for precision skincare formulations until further comprehensive safety and concentration data are established.
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