BI-0235 (OTTO) 1-Butyl-3-methylimidazolium iodide, 99% Cas 65039-05-6 - used as a non-volatile electrolyte in dye-sensitized photochemical cells. It can also be used as a stabilizer/promotor/reaction medium for the transition metal catalyzed biphasic oxidative cyclocarbonylation of β-aminoalcohols and 2-aminophenol to form the corresponding 2-oxazolidinones.