3-[(5-Chloro-2-hy­droxy­benzyl­idene)amino]-2-sulfanyl­idene-1,3-thia­zolidin-4-one

In the title compound, C₁₀H₇ClN₂O₂S₂, the mean plane of the thioxo­thia­zolidine ring [maximum deviation = 0.032 (2) Å] is inclined to the benzene ring by 12.25 (4)°. There is a strong intra­molecular O—H...N hydrogen bond present. In the crystal, mol­ecules are linked via pairs of C—H...Cl hydrogen bonds, forming inversion dimers.