The title compound, C(8)H(7)ClN(2)O(2), is an inter-mediate in the synthesis of 5-chloro-isatin, which can be further transformed to 5-chloro-2-indolinone via a Wolff-Kishne reduction. The C(2)N acetamide plane forms a dihedral angle of 6.3 (3)° with the benzene ring. An intra-molecular C-H⋯O inter-action results in the formation of a six-membered ring. In the crystal, inter-molecular N-H⋯O, N-H⋯N and O-H⋯O hydrogen bonds link the mol-ecules into multimers, forming sheets.