title: 2-Amino-pyrimidinium nitrate.
abstract: In the title compound, C(4)H(6)N(3) (+)·NO(3) (-), the cation is coplanar with the anion (r.m.s. deviation = 0.048 Å), and links to the anion via an N-H⋯O hydrogen bond, forming an ion pair. In the crystal, adjacent ion pairs are further linked by N-H⋯O hydrogen bonds into linear chains running along the b axis.
authors.forename: Xiao-Li
authors.initials: XL
authors.lastname: Cheng
authors.forename: Shan
authors.initials: S
authors.lastname: Gao
authors.forename: Seik Weng
authors.initials: SW
authors.lastname: Ng