... 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 ... 500,000 yuan, employees more than 300 people including 32 engineering and technical personnel. 2. The Detailed Specifications of the ...