In the title compound, 2C8H12NO+·H2P2O72−, the linked PO4 groups SHOPSTORM_HIDDEN_PRODUCT of the diphosphate anion are almost eclipsed and the P—O—P angle is 134.45 (7)°.In the crystal, infinite ribbons of H2P2O72− anions propagate in [100], being linked by strong O—H.
O hydrogen bonds.The 4-methoxybenzylammonium cations bond to the diphosphate chains by N—H.O and C—H.
O Playing Cards links, and are themselves linked by C—H.π interactions.