Tetrasodium EDTA (4Na): A Powerful Heavy Metal Chelator for Industrial and Environmental Applications
Molecular Formula: C₁₀H₁₂N₂O₈Na₄ · 4H₂O
Molecular Weight: 452.23
CAS No.: 13235-36-4
| Item | Industrial Grade | Daily Chemical Grade | Spray Tetrasodium | Tetrasodium Dihydrate |
|---|---|---|---|---|
| Purity (%) | ≥99.0 | ≥99.5 | ≥99.3 | 107-109 |
| Chloride (Cl) (%) | ≤ 0.01 | ≤ 0.01 | ≤ 0.01 | ≤ 0.01 |
| Sulfate (SO₄, %) | ≤ 0.05 | ≤ 0.05 | ≤ 0.03 | ≤ 0.05 |
| Heavy Metals (Pb, %) | ≤ 0.001 | ≤ 0.001 | ≤ 0.001 | ≤ 0.001 |
| Iron (Fe, %) | ≤ 0.001 | ≤ 0.001 | ≤ 0.0005 | ≤ 0.001 |
| Loss on Drying (%) | ≥ 220 | ≥ 220 | ≥ 220 | ≥ 234 |
| Chelation Value (mg CaCO₃/g) | 10.5-11.5 | 10.5-11.5 | 10.5-12.5 | 10.5-11.5 |
| NTA (%) | ≤ 1.0 | ≤ 0.1 | ≤ 3.0 | —— |
| Density (g/L) | —— | —— | 600-800 | —— |
| Appearance | White Crystal Powder | White Crystal Powder | White Powder | White Crystal Powder |
Appearance: Tetrasodium Ethylenediaminetetraacetic acid is typically a white crystalline powder, and the specific appearance can vary slightly depending on the grade.
Chelation Value: Tetrasodium EDTA is a strong chelating agent, and its ability to form stable complexes with metal ions is crucial in various applications such as water treatment, agriculture, and cosmetics.
Purity: The purity of this compound ranges from 99.0% to 99.5%, with the industrial-grade material typically offering the lowest purity level, and the daily chemical grade having higher purity requirements.
Chemical Composition: It contains sodium (Na) and ethylenediaminetetraacetic acid (EDTA), and in the form of dihydrate, it includes water molecules that aid in its solubility and stability.
Tetrasodium EDTA is widely used across various industries due to its chelating properties:
