N′-{(E)-[5-(Hy­droxy­meth­yl)furan-2-yl]methyl­idene}pyridine-4-carbohydrazide dihydrate

In the title compound, C(12)H(11)N(3)O(3)·2H(2)O, the dihedral angle formed by the planes of the pyridine and the furan rings of the organic carbohydrazide mol­ecule is 4.66 (7)°. In the crystal, these mol­ecules form stacks along the b-axis direction, neighbouring mol­ecules within each stack being related by inversion and the shortest distance between the centroids of the pyridine and furan rings being 3.714 (1) Å. Mol­ecules from neighboring stacks are linked by pairs of N—H⋯O hydrogen bonds. The water mol­ecules fill the channels between the stacks being linked by O—H⋯O hydrogen bonds into helices along [010]. Besides this, water mol­ecules are involved in O—H⋯N and O—H⋯O hydrogen bonds with the carbohydrazide mol­ecules, thus forming a three-dimensional network, augmented by weak C—H⋯O interactions.