... , and of course, with competitive prices. 2-Phosphonobutane-1,2,4-Tricarboxylic Acid(PBTCA)PBTCACAS No.: 37971-36-1Dequest: 7000Molecular weight: 270 ... content of phosphoric, has structural features of both phosphoric acid and carboxylic acid group, which enable its excellent scale and corrosion inhibition ... skin, once contacted, flush with water. 2-Phosphonobutane-1,2,4-Tricarboxylic Acid (PBTCA)