6-Chloro-8-methyl-4H-3,1-benzoxazine-2,4(1H)-dione

The two molecules in the asymmetric unit of the title compound, C9H6ClNO3, are nearly planar, with r.m.s. deviations of 0.034 and 0.037 Å. The crystal structure is stabilized by two weak intermolecular N—H⋯O interactions.