In the title complex, (CH7N4)[Sb(C10H12N2O8)]. H2O, the lone-pair electrons
of the Sb atom occupy an axial site in the psi-pentagonal bipyramidal poly
hedron [Sb-N 2.265 (2)-2.507 (2) and Sb-O 2.144 (1)-2.543 (2) Angstrom]. Th
e (ethylenediaminetetraacetato)antimonate anion, the aminoguanidinium catio
n and the lattice water are linked by hydrogen bonds into a two-dimensional
network structure.