Ethylenediaminetetraacetic acid (EDTA) is an aminopolycarboxylic acid with the formula Câ‚â‚€Hâ‚â‚„Nâ‚‚O₈Naâ‚‚.2Hâ‚‚O This white, water-soluble solid.is the disodium salt form of edetate, a heavy metal chelating agent with anti-hypercalcemic and anti-arrhythmic properties.