Redetermination of bis(S-methylthiuronium) sulfate

The single-crystal structure determination of the title compound, 2C2H7N2S+·SO42−, confirms the previous structure determination [Stam (1962). Acta Cryst. 15, 317–322]. The present study includes the determination of the H-atom parameters, which revealed several inter­ionic N—H⋯O hydrogen bonds. The S atom of the sulfate anion is situated on a crystallographic twofold rotation axis.