Ethane-1,2-diaminium 2,2′-[terephthaloylbis(azanediyl)]diacetate tetrahydrate

In the title salt hydrate, C2H10N22+·C12H10N2O62−·4H2O, each of the ions is located about a centre of inversion and the asymmetric unit is completed by two water molecules in general positons. In the crystal, the cations, anions and water molecules are connected by O—H...O and N—H...O hydrogen bonding into a three-dimensional network