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In the title compound, C2H10N22+·2C6H4NO2−, the cation lies on an inversion centre. The asymmetric unit is composed of one nicotinate anion and one half ethylenediaminium cation. All the amino H atoms are involved in N—H...O and N—H...N hydrogen bonds. These hydrogen bonds link the ionic units into a three-dimensional network. In addition, π–π interactions between pyridine rings [centroid–centroid distance = 3.6037 (7) Å] further stabilize the crystal structure.