title: Bis(3-hy-droxy-propanaminium) naphthalene-1,5-disulfonate.
abstract: In the title molecular salt, 2C(3)H(10)NO(+)·C(10)H(6)O(6)S(2) (2-), the cations and anions are associated via N-H⋯O and O-H⋯O hydrogen-bonding inter-actions, giving rise to a three-dimensional structure with zigzag rows of cations lying between rows of anions. The asymmetric unit contains one cation and one half-anion, which is related to the remainder of the mol-ecule by an inversion center.
authors.affiliation: Ordered Matter Science Research Center, Southeast University, Nanjing 211189,  People's Republic of China.
authors.forename: Yu
authors.initials: Y
authors.lastname: Jin