Crystal structure of 4-sulfamoylanilinium di­hydrogen phosphate

In the crystal structure of the title mol­ecular salt, C₆H₉N₂O₂S⁺·H₂PO₄⁻, 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.