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In the title salt hydrate, C22H30N2O62+·2Cl−·CH4O, the dication adopts a U-shaped conformation whereby the benzene rings are splayed out from the chain linking them. All components of the asymmetric unit are linked into a cohesive entity by a combination of O—H...Cl−, N+—H...Cl− and N+—H...O charge-assisted hydrogen-bonding interactions. The assemblies thus formed are linked into supramolecular helical chains along [010] via C—H...O contacts. The resulting chains are, in turn, consolidated into the three-dimensional crystal structure by C—H...π contacts.