Crystal structure of (E)-2-(2-{5-[(2-acet­oxy­eth­yl)(meth­yl)amino]­thio­phen-2-yl}vin­yl)-3-methyl­benzo­thia­zolium iodide monohydrate

In the cation of the title hydrated salt, C₁₉H₂₁N₂O₂S₂⁺·I⁻·H₂O, the benzo­thia­zolium ring system is approximately planar [maximum deviation = 0.0251 (15) Å], and it makes a small dihedral angle of 1.16 (18)° with the plane of the thio­phene ring. In the crystal, the cations, anions and crystalline water mol­ecules are linked by classical O—H...O, O—H...I and weak C—H...O hydrogn bonds, forming a three-dimensional supra­molecular network. π–π stacking is observed between parallel thia­zole rings of adjacent cations [centroid–centroid distance = 3.5945 (16) Å].