Science
Mechanism of Action
This ingredient functions by significantly reducing the surface tension between different components within a product. Its molecular structure, featuring both hydrophilic (water-attracting) and hydrophobic (oil-attracting) ends, allows it to encapsulate oil, dirt, and other impurities, facilitating their easy removal with water. Furthermore, it acts as an emulsifying agent, ensuring the uniform dispersion of immiscible liquids, thereby maintaining product stability. In aqueous systems, it also contributes to the formation of a rich, stable foam.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
Laureth Carboxylic Acid generally exhibits chemical stability at ambient room temperatures. With an approximate pKa of 5, typical of a carboxylic acid, it is most stable within acidic to neutral pH ranges. Manufacturers advise against contact with alkalis during storage to maintain its integrity.
Conflicts
- Alkalis (during storage)
- Strong acids/bases (may lead to precipitation or destabilization of dispersed systems)
Safety
Safety Profile
A general 'Laureth Carboxylic Acid' report indicated low acute oral toxicity. However, undiluted application caused very slight erythema and peeling in rabbit skin irritation tests. In rabbit eye irritation tests, the undiluted chemical acted as a severe irritant, with effects persisting over 20 days. Public exposure estimates for related compounds have considered concentrations up to 15%, though this is an exposure projection, not a defined safety limit. The EWG Skin Deep database notes 'Sodium Laureth-13 Carboxylate' has high contamination concerns, which may not directly apply to Laureth-13 Carboxylic Acid. No specific CIR or SCCS safety assessment for Laureth-13 Carboxylic Acid has been found.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Laureth-13 Carboxylic Acid offers valuable surfactant and cleansing properties, with indications of potential mildness in formulated products (based on studies of its sodium salt); however, a definitive safety assessment is needed due to the absence of specific CIR/SCCS reviews and reported irritation in undiluted animal tests.
Related
Similar Ingredients
Finding similar ingredients…