Received 5 December 2013
In the title p-toluenesulfonate salt of the drug dapsone, C12H13N2O2S+·C7H7O3S-, the dihedral angle between the two aromatic rings of the dapsone monocation is 70.19 (17)° and those between these rings and that of the p-toluenesulfonate anion are 72.34 (17) and 46.43 (17)°. All amine and aminium H atoms are involved in intermolecular N-HO hydrogen-bonding associations with sulfonyl O-atom acceptors as well as one of the sulfone O atoms, giving a three-dimensional structure.
For drug applications of dapsone, see: Wilson et al. (1991). For the structures of dapsone solvates, see: Kus'mina et al. (1981); Lemmer et al. (2012). For the structures of adducts and a salt of dapsone, see: Smith & Wermuth (2012a,b, 2013).
Data collection: CrysAlis PRO (Agilent, 2013); cell refinement: CrysAlis PRO; data reduction: CrysAlis PRO; program(s) used to solve structure: SIR92 (Altomare et al., 1993); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: PLATON (Spek, 2009); software used to prepare material for publication: PLATON.
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: SJ5377 ).
The authors acknowledge financial support from the Australian Research Committee and the University Library and the Science and Engineering Faculty, Queensland University of Technology.
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