In the title sulfanilamide derivative, C15H13NO2S, which shows significant activity against Staphylococcus aureus and Escherichia coli, the dihedral angle between the planes of the aromatic rings is 62.15 (19)° and the four-coordinate S atom adopts an almost ideal tetrahedral geometry. In the crystal, N—H...O and C—H...O hydrogen bonds link the molecules into a three-dimensional network.
