BARIUM SULFATE OF INCREASED FLOWABILITY AND DENSITY,SUITABLE AS A RADIO-OPAQUE COMPONENT IN RADIOGRAPHIC CONTRAST AGENTS,AND THE RADIOGRAPHIC CONTRAST AGENT CONTAINING THIS BARIUM SULFATE

摘要

Barium sulfate suitable for the preparation of radiographic contrast agents of increased flowability and density is obtained by a high temperature treatment at 700 DEG to 1,200 DEG C. and preferably at 800 DEG to 1,000 DEG C. The barium sulfate so sintered is distinguished by a bulk density of 2.5 to 3 g/ml and its aqueous suspension, containing 200 g of barium sulfate per 100 ml, is distinguished by a viscosity of no more than 1,000 mPas. Radiographic contrast agents containing at least 200 g of sintered barium sulfate per 100 ml are outstandingly suitable for the difficult double contrast visualization of the stomach and gastric mucosa.