Crystallise reductic acid from EtOH, EtOAc (m 213-213.5o) or EtOH/EtOAc. It has been sublimed at 0.5mm. The osazone has m 245o(dec) (from BuOH). [Hess et al. Justus Liebigs Ann Chem 563 31 1939, 592 137 1955, 736 134 1970, Beilstein 8 III 1942, 8 IV 1714.]
