4-Chloro-2,6-dinitro-phenol

The aromatic ring of the title compound, C(6)H(3)ClN(2)O(5), is almost planar (r.m.s. deviation = 0.007 Å); one nitro substituent is nearly coplanar with the ring [dihedral angle = 3(1)°], whereas the other is twisted [dihedral angle = 36 (1)°]. The phenol OH group is intra-molecularly hydrogen bonded to the nitro group that is coplanar with the ring, generating an S(6) graph-set motif.