Science
Mechanism of Action
Operating as a surfactant, this ingredient reduces the surface tension of liquids, facilitating the mixing of oil and water. This action efficiently washes away fats and soil particles from the skin. Furthermore, its emulsifying properties contribute to the formation and stabilization of finely dispersed oil-in-water mixtures, enhancing product texture and stability.
Research
Clinical Evidence
Medium confidenceN/A
Key findings
- 01 Sodium Coco-Sulfate (SCS), a related alkyl sulfate, has been effectively utilized as an anionic surfactant in concentrations ranging from 0.3% to 29.0% for removing oily stains and residues.
- 02 Studies indicate that SCS possesses a strong ability to interact with epidermal lipids, potentially leading to their elution from the skin and subsequent damage to the protective epidermal barrier.
- 03 Research on human keratinocytes (HaCaT) revealed a significant decrease in cell proliferation after 4 hours of incubation with SCS, although this effect was less pronounced compared to Sodium Lauryl Sulfate (SLS).
- 04 The skin irritation potential of SCS, as determined by its zein value, is approximately 15% lower than that of SLS.
Transparency
Dusting Analysis
The Formula
Formulation
Stability
This ingredient maintains activity across both acidic and basic environments, with an optimal pH range typically between 9.0 and 11.0 in a 1% aqueous solution. It exhibits partial resistance to hard water, suggesting the need for co-formulation with agents offering greater hard water stability.
Conflicts
- Partial resistance to hard water necessitates co-formulation with hard water resistant agents.
Safety
Safety Profile
The CIR Expert Panel concluded that Sodium Coco/Hydrogenated Tallow Sulfate is safe for use as a cosmetic ingredient, specifically deeming it safe for rinse-off products and safe for leave-on products at concentrations up to 1%.
Your Skin
Skin Compatibility
Our Assessment
Verdict
While effective as a cleansing and foaming agent, its noted potential for epidermal lipid disruption and impact on cell proliferation suggests a cautious approach, making it questionable for precision skincare, particularly in leave-on formulations.
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