barium sulfate BaSO4 98% CNPC brand barium sulfate FEATURES Colorless orthorhombic system crystalline or white amorphous powder, relative density 4.5015, melting point 1580, nontoxic, almost insoluble in water, ethanol and acid, soluble in hot and concentrated sulfuric acid. Dried, it is easy to conglomerate.MAIN USAGE Used as raw materials or fillers of paint, printing ink, plastics, rubber and ...