It can be freed from metal impurities as described for glucose-1-phosphate. The solubility of the Na salt is 5% in H2O at 20o. Its barium salt can be purified by solution in dilute HCl and precipitation by neutralising the solution. The precipitate is washed with small volumes of cold water and dried in air. Alternatively the barium salt is dissolved in H2O, 4volumes of EtOH are added, the precipitate is collected, washed with 90% EtOH, absolute EtOH, 75% EtOH/25% Et2O, 25% EtOH/75% Et2O and finally dry Et2O. The dry Barium salt has [] D +17.9o (c 1, H2O). [Beilstein 1 IV.]
