Crystal structure of N-hy­droxy­quinoline-2-carboxamide monohydrate

The title compound, C(10)H(8)N(2)O(2)·H(2)O, consists of an N-hy­droxy­quinoline-2-carboxamide mol­ecule in the keto tautomeric form and a water mol­ecule connected through an O—H⋯O hydrogen bond. The N-hy­droxy­quinoline-2-carboxamide mol­ecule has a nearly planar structure [maximum deviation = 0.062 (1) Å] and only the hy­droxy H atom deviates significantly from the mol­ecule plane. In the crystal, π–π stacking between the aromatic rings [inter­centroid distance = 3.887 (1) Å] and inter­molecular O—H⋯O hydrogen bonds organize the crystal components into columns extending along the b-axis direction.