1-Methyl-4-[(E)-2-(3-hy­droxy-4-meth­oxy­phen­yl)ethen­yl]pyridinium 4-bromo­benzene­sulfonate monohydrate

In the title hydrated salt, C(15)H(16)NO(2) (+)·C(6)H(4)BrO(3)S(−)·H(2)O, the cation exists in an E conformation with respect to the ethenyl bond and is almost planar, with a dihedral angle of 2.62 (12)° between the planes of the pyridinium and benzene rings. The meth­oxy substituent deviates slightly from the plane of its attached benzene ring [C(meth­yl)—O—C—C torsion angle = −11.6 (6)°]. In the crystal, the cations, anion and water mol­ecules are linked together into chains along [010] by O—H⋯O hydrogen bonds and weak C—H⋯O inter­actions. There is a short Br⋯O contact [3.029 (2) Å]. The crystal structure also features C—H⋯π inter­actions involving the benzene ring of the anion.