title: 4-Amino-3-(4-hydroxy-phen-yl)-1H-1,2,4-triazol-5(4H)-one.
abstract: The mol-ecule of the title compound, C(8)H(8)N(4)O(2), is nearly planar, with a dihedral angle between the rings of 1.1 (1)°. Adjacent mol-ecules are linked into a layered structure by hydr-oxy-oxo O-H⋯O and triazol-yl-hydr-oxy N-H⋯O hydrogen bonds. Only one of the H atoms of the pyramidal amino group is engaged in building up the infinite layer. The second H atom of the amino group also shows hydrogen-bonding inter-actions, linking adjacent layers into a three-dimensional network.
authors.forename: Kai-Ge
authors.initials: KG
authors.lastname: Shi
authors.forename: Guang
authors.initials: G
authors.lastname: Yang
authors.forename: Seik Weng
authors.initials: SW
authors.lastname: Ng