Crystal structure of 2-amino-5-methyl­sulfanyl-1,3,4-thia­diazol-3-ium chloride monohydrate

The title salt, C(3)H(6)N(3)S(2) (+)·Cl(−)·H(2)O, crystallized with two organic cations, two chloride anions and two water mol­ecules in the asymmetric unit. The methyl C atoms deviate from their respective bound ring planes by 0.081 and 0.002 Å. In the crystal, the components are connected via N—H⋯O, N—H⋯Cl and O—H⋯Cl hydrogen bonds, forming sheets lying parallel to (100). The sheets are linked into bilayers by O—H⋯Cl hydrogen bonds involving the chloride ions and water mol­ecules. Within the bilayers there are π–π inter­actions [inter-centroid distances = 3.4654 (4) and 3.4789 (4) Å] involving inversion-related cations.