Crystal structure of 4-sulfamoylanilinium di­hydrogen phosphate

In the crystal structure of the title mol­ecular salt, C(6)H(9)N(2)O(2)S(+)·H(2)PO(4) (−), the sulfomylalinium cations and the di­hydrogen phosphate anions form independent [100] chains through N(s)—H⋯O (s = sulfamo­yl) and O—H⋯O hydrogen bonds, respectively. The chains are cross-linked by N(a)—H⋯O (a = amine) hydrogen bonds, generating (010) sheets. Two C—H⋯O hydrogen bonds involving diametrically opposite C atoms in the benzene ring of the cation as donors form chains parallel to [202] in which P=O and P—OH groups are acceptors. Together, these inter­actions lead to a three-dimensional network.