Abstract
The hydrazinium residue in the cation of the title salt, C
6
H
10
N
3
O
2
S
+
·Cl
−
, is twisted out of the plane of the benzene ring to which it is attached [N—N—C—C torsion angle = 25.9 (2)°] and the amino group is almost perpendicular to the benzene ring [N—S—C—C torsion angle = 88.71 (16)°]. In the crystal, the cations are linked by N—H⋯O hydrogen bonds and π–π interactions [ring centroid distance = 3.7280 (11) Å], forming layers in the
bc
plane that are connected by N—H⋯Cl hydrogen bonds.