Diethylenetriamine pentaacetic acid pentasodium salt (DTPA-5Na) is a potent chelating agent capable of forming stable water-soluble complexes with various metal ions such as iron, copper, calcium, and magnesium. It is primarily used as a stabilizer for bleaching agents, a water softener, textile printing and dyeing auxiliary, and analytical chemistry reagent. It features excellent water solubility, maintains activity across a wide pH range, effectively prevents metal ion interference, and enhances product performance.
| Chemical Name | Pentasodium Diethylenetriaminepentaacetate |
| Chemical Formula | C14H18N3Na5O10 |
| CAS | 140-01-2 |
| Appearance | Transparent pale yellow liquid |
| Melting point | -40 ℃ |
| Boiling point | 106 ℃ |
| Density（ρ20）, g/cm³ | 1.29g/mL |
| Molecular Weight | 503.26 |
| Solubility | Slightly soluble in water, soluble in hot water and alkaline solutions |
1. EDTA-5Na rapidly forms water-soluble complexes with calcium, magnesium, iron, lead, copper, manganese, and other ions, exhibiting particularly strong chelating capacity toward high-valent colored metals. Consequently, it is widely used as:
2. A stabilizer and performance enhancer for hydrogen peroxide bleaching;
3. A water softener;
4. An analytical chemistry standard reagent;
5. An acid-base titrant.
As a hydrogen peroxide decomposition inhibitor, it is used in textile bleaching and paper pulp bleaching processes.
Store in a cool place. Keep container tightly closed and store in a dry, well-ventilated area.
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