Bis(2-methyl-piperidinium) naphthalene-1,5-disulfonate.
In the structure of the title mol-ecular salt, 2C(6)H(14)N(+)·C(10)H(6)O(6)S(2) (2-), the asymmetric unit consists of one 2-methyl-piperidinium cation and one-half of a naphthalene-1,5-disulfonate anion; the anion lies across a centre of symmetry. In the crystal, the cations and anions are linked through N-H⋯O hydrogen bonds, forming a two-dimensional network.
Ordered Matter Science Research Center, College of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189,  People's Republic of China.
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