2-Hy-droxy-pyridinium p-toluene-sulfonate.
In the title molecular salt, C(5)H(6)NO(+)·C(7)H(7)O(3)S(-), the cations and anions are connected by N-H⋯O and O-H⋯O hydrogen bonds, forming [100] chains.
Ordered Matter Science Research Center, Southeast University, Nanjing 211189,  People's Republic of China.
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Jin