2-(Hydro­xy­methyl)­pyridinium di­hydrogenphosphate

The title compound, C₆H₈NO⁺·H₂PO₄⁻, consists of 2-(hy­droxy­methyl)­pyridinium and di­hydrogen­phosphate ions. The di­hydrogen­phosphate moieties are linked into chains by pairs of P—O—H...O—P hydrogen bonds. The 2-(hydroxy­methyl)­pyridinium cations are connected to the di­hydrogen­phosphate units by O—H...O and N—H...O hydrogen bonds. Weak π–π interactions help to determine the interchain packing.