Science
Mechanism of Action
Functioning as an anionic and co-surfactant, Laureth-11 Carboxylic Acid reduces the surface tension of cosmetic formulations, enabling the effective removal of oils and impurities from the skin and hair. Described as a 'crypto-anionic surfactant', it exhibits properties of both anionic and non-ionic surfactants. In skincare, it supports increased water content retention, contributing to a fresh and light skin sensation, and notably boosts the skin's tolerance to other surfactants.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
Laureth-11 Carboxylic Acid demonstrates stability across a broad pH range, maintaining efficacy in acidic, neutral, and dilute alkaline conditions. While generally soluble in water, some reports suggest it is insoluble in cold water but disperses readily in hot water through micelle formation.
Conflicts
- Alkali reagents
Safety
Safety Profile
Generally considered very mild for the skin, Laureth-11 Carboxylic Acid can be severely irritating to the eyes in its undiluted form. A concentration below 10% is recommended for formulations that may come into contact with the eyes to minimize severe effects, with even diluted solutions (<1.5%) potentially causing moderate eye irritation. Its salt derivative, Sodium Laureth-11 Carboxylate, is recognized as 'extremely safe' by the Safe Cosmetics Database and approved for organic cosmetics by EcoCert and the Organic Food Federation. The ingredient is listed in the FDA Global Substance Registration System (GSRS).
Your Skin
Skin Compatibility
Our Assessment
Verdict
This mild, multi-functional surfactant effectively cleanses and emulsifies while improving skin tolerance and hydration, making it a valuable addition to various skincare formulations, particularly for sensitive skin.
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