Diphenyl thiourea, commonly known as white medicine. Its structural formula is: Baiyao is a water-insoluble white powder used for flotation of copper , lead and zinc sulfide ore. It's a strong galena collector ability, pyrite weak selective flotation slow. In practice, the white drug is dissolved in aniline (added 10% to 20% o-toluidine solution, usually called TT mixture), because of the high cost, the current industrial application is not much. Dongying Wanlong Mechanical Mould Co,.Ltd , https://www.wlcasting.com