2-Methyl-4-oxopentan-2-aminium 2-sulfamoylbenzoate

In the title salt, C(6)H(14)NO(+)·C(7)H(6)NO(4)S(−), the 2-sulfamoylbenzoate anion has two intra­molecular hydrogen bonds, forming a five membered C—H⋯O and a seven-membered N—H⋯O twisted ring with ring motifs S(5) and S(7), respectively, while the 2-methyl-4-oxopentan-2-aminium cation also has a stabilizing intra­molecular N—H⋯O hydrogen bond with a twisted S(6) ring motif. The anions form inversion-related dimers with R (2) (2)(8) ring motifs through inter­molecular N—H⋯O hydrogen bonding. The dimers and cations are further linked and stabilized through inter­molecular N—H⋯O and C—H⋯O bonds, forming zigzag-shaped layers that extend along the crystallographic a axis.