N'-(5-Chloro-2-hydroxy-benzyl-idene)-3,4,5-trihydroxy-benzohydrazide dihydrate

The benzohydrazide mol-ecule in the title dihydrate, C(14)H(11)ClN(2)O(5)·2H(2)O, is non-planar, with the two aromatic rings at either side of the -C(=O)-NH-N=CH- unit forming a dihedral angle of 29.7 (2)°. The benzohydrazide mol-ecule is linked to the water mol-ecules by O-H⋯O and N-H⋯O hydrogen bonds, with other O-H⋯O hydrogen bonds leading to a layer structure.