... particle size dispersion, high chemical stability. Barium sulfate content of 98%, and its high whiteness, no black sports, no impurities, good ... production using leading technology, its whiteness and barium sulfate content above 98%,high purity, free of impurities. No smell in the production ... .18Standard (Q/TNRC 1-2009) CUOMEI natural barium sulfate baso4 98%