(3RS)-S-[1-(3-Chloro-phen-yl)-2-oxopyr-roli-din-3-yl]thio-uronium bromide.

In the title molecular salt, C(11)H(13)ClN(3)OS(+)·Br(-), the C-N bond lengths in the -S-C(NH(2))(2) fragment indicate partial double-bond character of these bonds. The constituent ions are connected by N-H⋯Br bridges into Z-shaped chains. The supra-molecular architecture of the structure can be described by being composed of these chains inter-locked by additional C-H⋯Br short contacts. An intra-molecular N-H⋯O=C bridge, as well as weak C-H⋯O hydrogen bonds, are also present in the structure.