In the title compound, C16H13NO3S, the plane of the aminobenzene ring makes a dihedral angle of 61.04 (6)° with the naphthalene ring system. Both ring systems form weak intramolecular C—H⋯O hydrogen bonds with the sulfonate group. In the crystal structure, weak intermolecular N—H⋯O hydrogen bonds and a C—H⋯π interaction are observed.
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