... , and of course, with competitive prices 2-Phosphonobutane-1,2,4-Tricarboxylic Acid(PBTCA)PBTCACAS No.: 37971-36-1Dequest: 7000Molecular weight ... .PBTCA is usually used together with zinc salt, copolymer, organophosphine, imidazole and other water treatment agents. When used alone, the dosage ...