Bis(benzyl­ammonium) di­hydrogen diphosphate

The asymmetric unit of the title salt, 2C₆H₅CH₂NH₃⁺·H₂P₂O₇²⁻, contains two independent benzyl­ammonium cations and a di­hydrogen diphosphate dianion. In the crystal, O—H...O and N—H...O hydrogen bonds link the cations and anions, forming a two-dimensional network parallel to (010). Within this network, weak C—H...O hydrogen bonds are observed.