The structure of bis(2-amino-1,5-dihydro-1-methyl- 4H-imidazol-4-one-N 3 )dichlorocadmium(II), [CdCl 2 (C 4 H 7 N 3 O) 2 ], consists of four-coordinate molecular units with the metal centre bonded to two imidazole N(3) atoms and two Cl ions. The coordination about the Cd atom is pseudo-tetrahedral. The amino H atom is hydrogen bonded to the carbonyl O atom of an adjacent molecule