S,S′-(Pyridazine-3,6-diyl)dithiouronium dichloride methanol monosolvate

In the title compound, C6H10N6S22+·2Cl−·CH3OH, the pyridazine ring is almost planar, the greatest deviation from the mean plane being 0.025 (2) Å for one of the ring N atoms. The two thiouronium substituents are tilted out of this plane by 60.87 (6) and 57.94 (7)°. The thiouronium cations and the chloride anions are linked by strong N—H...Cl hydrogen bonds. The methanol solvent molecule interacts with both the chloride ion (through an O—H...Cl hydrogen bond) and the cation (through an N—H...O hydrogen bond), resulting in a three-dimensional supramolecular arrangement.