... Sulfate(BaSO4) 95%-98% from Kevin Ren,Hebei Yuhuan Chemical Co.,ltd Precipitated Barium Sulfate(BaSO4) 95%-98% from Kevin Ren,Hebei ... Yuhuan Chemical Co.,ltd 1. The Introduction of Hebei Yuhuan Chemical Co.,ltdHebei Yuhuan Chemical Co.,Ltd is founded in 1975 and ... Sulfate(BaSO4) 95%-98% from Kevin Ren,Hebei Yuhuan Chemical Co.,ltd