It is extensively used as a chelating agent in detergents to bind metal ions and prevent scale in medicine for treating heavy metal poisoning (e.g. lead) in food preservation as an antioxidant stabilizer and in analytical chemistry for titrations.

Its core purpose is to form stable water-soluble complexes with divalent and trivalent metal ions like Ca Mg Fe and Pb (log K values up to 25.1 for Fe) sequestering them to soften water inhibit oxidation or facilitate their safe removal.

EDTA or ethylenediaminetetraacetic acid is a white crystalline water-soluble aminopoly carboxylic acid with the formula C10H16N2O8 featuring an ethylenediamine backbone and four carboxylate groups that enable it to act as a hexadentate ligand.