Science
Mechanism of Action
This ingredient functions primarily as a surfactant by lowering the surface tension of liquids, which enables the emulsification of oil and water. This property is crucial for its role as a cleansing agent, allowing it to lift and wash away fat and soil particles from the skin and hair. Beyond its cleansing action, it contributes to the sensory experience of products by generating a soft and uniform foam.
Research
Clinical Evidence
Medium confidenceN/A
Key findings
- 01 At a concentration of 1.68% (derived from a 16.8% trade mixture diluted to 10%), it did not induce clinically significant irritation or allergic contact dermatitis in normal human subjects.
- 02 When tested at 10% concentration, it was classified as a mild skin irritant in healthy subjects when diluted in citrate buffer; however, another study found it did not induce skin irritation in dermatitis patients or healthy subjects. A lower concentration of 0.168% was predicted to be a mild skin irritant in a human cumulative irritation study.
Transparency
Dusting Analysis
As a primary cleansing surfactant, this ingredient is typically used at concentrations sufficient to achieve desired functional properties such as foam and cleansing ability, rather than for a specific biological 'active' threshold. Its efficacy is observable through physical properties in formulation.
The Formula
Formulation
Stability
Sulfosuccinate ingredients are susceptible to hydrolysis, particularly under acidic conditions, which can compromise product stability. The PEG-8 component itself typically functions within a pH range of 4.5-7.5.
Safety
Safety Profile
The CIR Expert Panel concluded that alkyl PEG sulfosuccinates, including this ingredient, are safe for cosmetic use at current concentrations when formulated to be non-irritating. Dermal penetration is considered unlikely due to its substantial polarity and molecular size. However, there is a noted concern that PEGs may be contaminated with ethylene oxide and 1,4-dioxane if not manufactured to stringent purification standards. Products containing this ingredient are allowed for EWG VERIFIED status but require meeting specific use restrictions and warnings, especially regarding potential contamination and inhalable forms.
Your Skin
Skin Compatibility
Our Assessment
Verdict
This ingredient is a valuable cleansing surfactant, effectively removing impurities while offering a pleasant feel, provided it is carefully formulated to be non-irritating and manufactured without concerning contaminants.
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