(E)-N′-(2-Chlorobenzylidene)-3,5-dihydroxybenzohydrazide dihydrate

In the Schiff base molecule of the title compound, C14H11ClN2O3·2H2O, the benzene rings form a dihedral angle of 20.6 (1)°. The water molecules of crystallization are involved in the formation of a three-dimensional hydrogen-bonding network via O—H...O and N—H...O hydrogen bonds.