Ethylemediaminetetraacetic Acid Disodiam Salt Dihydrate 99+%
Ethylenediaminetetraacetic acid (EDTA), also known by several other names, is a chemical used for both industrial and medical purposes. It was synthetized for the first time in 1935 by Ferdinand Münz.[3]
It is an aminopolycarboxylic acid and a colorless, water-soluble solid. Its conjugate base is ethylenediaminetetraacetate. It is widely used to dissolve limescale. Its usefulness arises because of its role as a hexadentate ("six-toothed") ligand and chelating agent, i.e., its ability to sequester metal ions such as Ca2+ and Fe3+. After being bound by EDTA into a metal complex, metal ions remain in solution but exhibit diminished reactivity. EDTA is produced as several salts, notably disodium EDTA and calcium disodium EDTA.
| C10H16N2O8 | |
| Molar mass | 292.24 g·mol−1 |
| Appearance | Colourless crystals |
| Density | 0.860 g cm−3 (at 20 °C) |
| log P | −0.836 |
| Acidity (pKa) | 1.782 |
| Basicity (pKb) | 12.215 |