AQUEOUS BORIC ACID-BORATE-MANNITOL EQUILIBRIA

Despite recent reports to the contrary, the stoichiometry of the aqueous boric acid-borate-mannitol system has been shown to involve both'a 1:1 and 2:1 mannitol-borate complex. Reliable values of the formation constants of these complexes have been determined from electrometric pH measurements. Widely divergent results obtained by previous workers in this area have been shown to be largely the result of misinterpretation of experimental data rather than anomalous behavior of the system. Reliable data taken from previous work have been shown to give the same results as data obtained in this laboratory, thus providing a consistent model for boric acid-borate-mannitol equilibria. © 1969, American Chemical Society. All rights reserved.