In the title compound, C15H18N3+.C7H7O3S-, the phenylene and pyridyl rings
are somewhat twisted with respect to each other, forming a dihedral angle o
f 23.49 (6)degrees. The compound contains a dipolar chromophoric cation, bu
t crystallizes in the centrosymmetric space group P2(1)/n and is thus not e
xpected to display quadratic non-linear optical effects.