Science
Mechanism of Action
This ingredient functions as an anionic surfactant and surface treatment agent that lowers the surface energy of inorganic particles like Titanium Dioxide. By creating a dual-repellent barrier, it prevents pigments from being wetted by external fluids, effectively 'locking' the color in place and reducing the absorption of skin oils into the formula.
Research
Clinical Evidence
High confidence5%
Key findings
- 01 Demonstrated ability to improve makeup wear-time and prevent color shifts caused by sebum oxidation.
- 02 Used as a binding agent in powder foundations to enhance skin feel and limit oil absorption.
Transparency
Dusting Analysis
As a technical surface treatment, it is rarely 'dusted' for marketing; it is either present at functional levels to treat pigments or entirely absent. Concentrations below 0.5% may be insufficient to provide the necessary hydrophobicity for long-wear claims.
The Formula
Formulation
Stability
Highly resilient against thermal degradation and oxidation; performs best in anhydrous systems or the oil phase of emulsions.
Synergies
- Titanium Dioxide
- Iron Oxides
- Silica
Conflicts
- Cationic surfactants
- Highly polar solvents
- Strongly acidic environments
Safety
Safety Profile
Classified as a PFAS (per- and polyfluoroalkyl substance). Due to environmental persistence and emerging regulatory bans in California (AB 2771) and the EU, its use is being phased out globally.
Your Skin
Skin Compatibility
Our Assessment
Verdict
While technically superior for long-wear performance, its classification as a PFAS and subsequent regulatory bans make it incompatible with modern clean and sustainable formulation standards.
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