Abstract: | In the title compound, [Cd(C2H8N2)2(H2O)2](C10H8NO3S)2·2H2O, the CdII atom, located on an inversion centre, has a distorted octahedral coordination geometry formed by two ethylenediamine and two water molecules. 4‐Aminonaphthalene‐1‐sulfonate acts as a counter‐ion to balance the charge, and two antiparallel anions showing strong π–π stacking interactions are linked by paired N—H⋯O(sulfonate) hydrogen bonds into an isolated R22(16) dimer. The crystal structure is stabilized by the π–π stacking interactions and hydrogen bonds. |