Ethylemediaminetetraacetic Acid Disodiam Salt Dihydrate 99+%

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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.

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