Activated Carbon, Impregnated Activated Carbon, Precipitated Silica manufacturer / supplier in China, offering Ptsa: 1, 3, 6, 8-Pyrenetetrasulfonic Acid Tetrasodium Salt, 50% Liquid (Fluorescent Tracer for Water Treatment, Cooling towers) CAS: 59572-10-0, Ptsa: 1, 3, 6, 8-Pyrenetetrasulfonic Acid Tetrasodium Salt, 98% Solid (Fluorescent Tracer for Water Treatment, Cooling towers) CAS: 59572-10-0, Quartz Sand for Water Treatment with Awwa Standard, F10 Series and so on.