Crystal structure and Hirshfeld surface analysis of ethane-1,2-diaminium 3-[2-(1,3-dioxo-1,3-di­phenyl­propan-2-yl­idene)hydrazin­yl]-5-nitro-2-oxido­benzene­sulfonate dihydrate

In the anion of the title hydrated salt, C(2)H(10)N(2) (2+)·C(21)H(13)N(3)O(8)S(2−)·2H(2)O, the planes of the phenyl rings and the benzene ring of the 5-nitro-2-oxido­benzene­sulfonate group are inclined to one another by 44.42 (11), 56.87 (11) and 77.70 (12)°. In the crystal, the anions are linked to the cations and the water mol­ecules by N—H⋯O and O—H⋯O hydrogen bonds, forming a three-dimensional network. Furthermore, there are face-to-face π–π stacking inter­actions between the centroids of one phenyl ring and the benzene ring of the 5-nitro-2-oxido­benzene­sulfonate group [centroid–centroid distance = 3.8382 (13) Å and slippage = 1.841 Å]. A Hirshfeld surface analysis was conducted to verify the contributions of the different inter­molecular inter­actions.