This application relates to a process for making a pharmaceutically acceptable formulation of gadofosveset trisodium monohydrate, wherein the process uses no more than one chromatographic purification for removal of impurities.本申請案係關於一種製備釓磷維塞三鈉單水合物(gadofosveset trisodium monohydrate)之醫藥學上可接受之調配物的方法,其中該方法僅僅使用一次層析純化以便移除雜質。