5-Hy­droxy-2-nitro­benzaldehyde thio­semicarbazone (HNBATSC)

The asymmetric unit of the title compound, C₈H₈N₄O₃S, consists of two independent mol­ecules. Each mol­ecule is approximately planar with dihedral angles of 8.71 (3) and 1.50 (2)° between the aromatic ring and the thio­semicarbazide moiety while the NO₂ group makes dihedral angles of 29.27 (3) and 17.78 (3)° with the benzene ring. In the crystal, the molecules are linked by N—H...S, O—H...O and N—H...O hydrogen bonds, forming two-dimensional networks parallel to (100).