5-[4-(1H-Imidazol-1-yl)phenyl]-2H-tetrazole dihydrate

In the title compound, C10H8N6·2H2O, the central aromatic ring makes dihedral angles of 23.59 (15) and 16.99 (16)° with the terminal imidazole and tetrazole rings, respectively, which are themselves almost coplanar [dihedral angle = 6.61 (18)°]. Two H atoms of the two water molecules are half occupied. In the crystal packing, weak intermolecular O—H...N, O—H...O and N—H...N hydrogen bonds and π–π stacking interactions [centroid–centroid distances of 3.73 (4) Å between benzene rings and 3.66 (3) Å between imidazole and tetrazole rings] are observed.