Science
Mechanism of Action
This ingredient releases fluoride ions that cross-link with nail keratin, increasing its density and structural integrity for harder nails. It additionally acts as a buffering agent to stabilize formula pH.
Research
Clinical Evidence
Medium confidence0.7%
Key findings
- 01 Wiechers, J.W. (2008). Multifunctional Cosmetics. Chapter 6: Multifunctional Nail Care Products.
- 02 U.S. Patent 4,919,920: Method of hardening and strengthening keratin and composition.
Transparency
Dusting Analysis
No specific data suggests this ingredient is commonly dusted in cosmetic formulations.
The Formula
Formulation
Stability
It is a highly hygroscopic solid, stable under normal conditions. However, it decomposes above 68°C or in contact with boiling mineral acids, potentially releasing hazardous gases.
Conflicts
- Strong acids
- Strong bases
- Alkaline materials
- Glass and porcelain
- Metals (in presence of moisture)
Safety
Safety Profile
The CIR has not reviewed this ingredient. It is restricted in the EU and classified as corrosive in its raw, undiluted form, capable of causing severe burns and eye damage.
Your Skin
Skin Compatibility
Our Assessment
Verdict
While effective for nail strengthening at 0.7%, its high irritancy and corrosive classification in raw form make it unsuitable for general skin applications.
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References
Sources