title: 2,4,6-Trimethyl-pyridinium dihydrogen phosphate.
abstract: In the title compound, C(8)H(9)N(+)·H(2)PO(4) (-), both the cation and anion have crystallographically imposed mirror symmetry (all atoms apart from one O atom lie on the mirror plane). In the crystal, anions and cations are linked by O-H⋯O and π-π stacking inter-actions [centroid-centroid distance = 3.4574 (6) Å], forming chains parallel to the b axis. Adjacent chains are further connected by N-H⋯O hydrogen bonds into a two-dimensional network.
authors.affiliation: Ordered Matter Science Research Center, College of Chemistry and Chemical Engineering, Southeast University, Nanjing 210096, People's Republic of China.
authors.forename: Hong-Ling
authors.initials: HL
authors.lastname: Cai
authors.forename: Jing
authors.initials: J
authors.lastname: Dai