EDTA\(^{4-}\) (Ethylenediaminetetraacetate), a hexadentate ligand, coordinates to metal ions via six donor atoms: four from carboxyl oxygen atoms and two from amine nitrogen atoms. This coordination capability enables EDTA to form exceptionally stable chelate complexes, establishing it as a potent chelating agent. Its applications are extensive, including water treatment for metal impurity removal, medical uses such as chelating excess metal ions in poisoning cases, and analytical chemistry for complexometric titrations.