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In the title compound, [Ag(C8H5O7S)(C10H8N2)]n, the Ag atom is tetracoordinated by two 4,4′-bipydidine (4,4′-bipy) N atoms and two monodentate sulfonate O atoms of the 5-sulfoisophthalic acid (H3sip) ligands. Adjacent Ag atoms are bonded through four sulfonate O atoms, forming a dinuclear unit with an Ag...Ag separation of 3.384 (5) Å; they are further linked together by the 4,4′-bipy lignds into a chain. Classical intermolecular O—H...O and non-classical intramolecular C—H...O hydrogen bonds are also observed in the two-dimensional supramolecuar structure.