Bis{μ-ethyl 4-[(4-hy­droxy­phen­yl)diazen­yl]benzoate-κO}bis­[aqua­(4-{[4-(eth­oxy­carbon­yl)phen­yl]diazen­yl}phenolato-κO){ethyl 4-[(4-hy­droxyphen­yl)diazen­yl]benzoate-κO}potassium]

The two potassium cations in the dinuclear mol­ecule of [K2{OC(C14H13ON2)O}2{OC(C14H13ON2)OH}4(H2O)2] are connected through a double bridge involving two centrosymmetrically related ethyl-4-(phenyl­azophenol)benzoate ligands. Each cation is also bound to a further non-bridging ligand, one ethyl-4-(phenyl­azophenolate)benzoate anion and a water mol­ecule, leading to a distorted fivefold coordination. The two uncharged ligands are almost planar, whereas in the anionic ligand the aromatic systems display a dihedral angle of 21.14 (11)°. A supra­molecular network formed by hydrogen-bonding inter­actions between phenolate anions, phenol groups and water mol­ecules connects the dimeric species along [001]. Hirshfeld surface calculations revealed the following contributions related to inter­molecular inter­actions: C⋯H (24.4%), O⋯H (13.2%) and N⋯H (7.4%). The azo fragment is disordered over two sets of sites [occupancy ratio 0.824 (15):0.176 (5)].