Science
Mechanism of Action
This anionic polyether carboxylate functions as a multi-purpose surfactant by lowering the surface tension of liquids, facilitating the mixing of oil and water to effectively cleanse skin and hair. Its unique, large molecular structure is thought to prevent significant skin penetration, thereby helping to maintain skin barrier integrity and reduce the potential for irritation. It uniquely blends the robust foaming and cleansing power of anionic surfactants with the inherent mildness and hard-water tolerance of non-ionic types. Functionally, it exhibits nonionic characteristics under acidic conditions (pH < 7) and acts as a hard water-tolerant anionic under alkaline conditions (pH > 7).
Research
Clinical Evidence
Medium confidenceN/A
Key findings
- 01 In controlled skin soak tests on forearms, 5% detergent solutions containing Sodium Laureth-6 Carboxylate in conjunction with Sodium Laureth Sulfate (SLES) and Lauryl Glucoside (LG) demonstrated no significant reduction in cutaneous capacitance and led to less noticeable erythema or dryness compared to formulations with soap and SLES alone. This highlights its role in enhancing formulation mildness.
- 02 A facial cleanser incorporating Sodium Laureth-6 Carboxylate and other alkyl carboxylates was observed to effectively remove facial sebum without contributing to skin dryness, suggesting a balance of cleansing efficacy and skin comfort.
Transparency
Dusting Analysis
No specific data pertaining to the phenomenon of 'dusting' or relevant thresholds for Sodium Laureth-6 Carboxylate were identified in the research.
The Formula
Formulation
Stability
Exhibits excellent stability across a broad pH spectrum, from 3 to 9, making it highly versatile for various formulations. It also demonstrates strong resistance to hard water and maintains good solubility at low temperatures, ensuring formulation robustness.
Synergies
- Enhances overall mildness and cleansing performance when co-formulated with other surfactants, such as Sodium Laureth Sulfate and Lauryl Glucoside, as evidenced in clinical applications.
Conflicts
- Alkali reagents (potential for reactivity or incompatibility).
Safety
Safety Profile
Although a direct CIR (Cosmetic Ingredient Review) report specifically for Sodium Laureth-6 Carboxylate is not available, a NICNAS (National Industrial Chemicals Notification and Assessment Scheme) report on related Laureth Carboxylic Acid (which includes Laureth-6 carboxylic acid) indicates that dermal exposure at concentrations up to 15% in rinse-off cosmetic and household products does not pose an unreasonable risk of skin irritation. Eye irritation is considered probable at concentrations below 10%, though typically not severe. This ingredient is frequently cited for its mild profile, being rated 'Teen SAFE', 'Baby SAFE', 'Eyelid SAFE', and 'Irritant Free' by SkinSAFE.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Sodium Laureth-6 Carboxylate is a valuable, mild anionic surfactant offering effective cleansing and foaming properties without compromising skin barrier integrity, making it highly suitable for all skin types, including sensitive.
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