The present invention provides a
metal-organic framework (MOF) that finds utility in the treatment or prevention of
hyperphosphatemia, wherein the MOF comprises a plurality of
metal ions, each coordinated to a plurality of organic ligands, and wherein the plurality of
metal ions comprises Zr4+ ions, Fe3+ ions, or a combination of Zr4+ and Fe3+ ions, and the plurality of organic ligands are selected from one or more members of the group consisting of a compound according to formula (I) as defined herein; a C2-6
alkane substituted by two
carboxylate groups and optionally substituted by one or two OH groups; a C4-6
alkene substituted by two
carboxylate groups; a benzenedicarboxylate optionally substituted by one or two NH2 groups; a benzenetricarboxylate; a 5-6 membered heteroaromatic ring comprising 1 or 2 atoms selected from the group consisting of N, S and O, wherein said heteroaromatic ring is substituted by two
carboxylate groups;
cyclohexane substituted by two carboxylate groups; and cystinate; or a pharmaceutically acceptable salt or solvate thereof. The present invention also provides a pharmaceutical composition comprising a MOF of the present invention.