Purification Methods
Purify the salt by dissolving it in the minimum volume of H2O (filter) and adding EtOH until separation of solid is complete. A solution is stable in the pH range 2.5-8. It has UV with max at 260nm (log 3.95) in H2O. The Ba salt has [] D +80o (c 0.57, H2O) [Woodward et al. J Am Chem Soc 88 852 1966, Abraham & Newton Biochem J 79 377 1961, Hodgkin & Maslen Biochem J 79 402 1961; see also Quart Reviews Chem Soc London 21 231 1967]. [Beilstein 27 III/IV 5902.]
