Purify it by flash chromatography (at 40 kPa) on silica and eluting with EtOH/hexane (4:1). IR has (CHCl3) 1630cm-1. [Eene et al. Helv Chim Acta 63 2271 1980.] Itisa good magnesium selectophore compared with Na, K and Ca [Lanter et al. Anal Chem 52 2400 1980].
