Chemical, Barium, Oil Field Chemical manufacturer / supplier in China, offering CAS: 7727-43-7 Baso4 Barite Powder Oil Drilling Grade API 13A, CAS: 55566-30-8 Tetrakis (hydroxymethyl) Phosphonium Sulfate Thps for Bactericide, CAS: 9003-05-8 High Quality Hydrolyzed Polyacrylonitrile Ammonium Nh4-Hpan for Drilling and so on.