4-Chloro-N′-[(E)-2-chloro­benzyl­idene]benzohydrazide monohydrate

The title compound, C₁₄H₁₀Cl₂N₂O·H₂O, has a nearly planar extended conformation [C—N—N—C = −173.66 (15)°]. The dihedral angle between the aromatic rings is 4.6 (2)°. The water mol­ecules alternate with benzohydrazide mol­ecules in chains formed by O—H...O hydrogen bonds which run parallel to the a axis. These chains are linked to neighboring chains through N—H...O and C—H...O inter­actions, forming a layer parallel to (001).