Black catching wothandizira amagwiritsidwa ntchito kwambiri sulfide flotation.Lakhala likugwiritsidwa ntchito kuyambira 1925.
Dzina lake la mankhwala ndi dihydrocarbyl thiophosphate.Agawidwa m'magulu awiri:
dialkyl dithiophosphate ndi dialkyl monothiophosphate.Ndiwokhazikika Ali ndi zabwino
katundu ndipo angagwiritsidwe ntchito pa pH yotsika popanda kuwonongeka msanga.