Poly[(μ-5,7-dihydr­oxy-4-oxo-2-phenyl-4H-chromene-8-sulfonato)potassium(I)]

In the polymeric title compound, [K(C15H9O7S)]n, the potassium cation is five-coordinated by four sulfonate O atoms and one carbonyl O atom. Two intra­molecular O—H⋯O hydrogen bonds stabilize the conformation of the anion. The polymeric three-dimensional supra­molecular architecture is formed via coordination inter­actions and π–π stacking inter­actions involving centrosymmetrically related pyrone rings, with a centroid–centroid separation of 3.513 (2) Å