The structure of [Cd(S2O3)(C12H8N2)(H2O)]. H2O is reported. It consist
s of polymeric chains evolving along the 2(1) symmetry axis, interconn
ected by hydrogen bonds. The Cd2+ environment is a distorted octahedro
n Which presents a rather long Cd-O distance [2.549 (4) Angstrom]. The
thiosulfate ion binds to three different cationic sites, through one
singly coordinated O atom and one S atom acting in a bridging mode.