... phosphorous industrial chain, and of course, with competitive prices 2-Phosphonobutane-1,2,4-Tricarboxylic Acid(PBTCA)PBTCACAS No.: 37971-36-1Dequest: ... excellent stabilizer for zinc salt. It is widely used in circulating cool water system and oilfield refill water system as ... , high hardness, high alkali and high conc-entration index. In lavation fields, it is used as chelating agent and metal ...