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EI-0305 (OTTO) 1-Ethyl-3-methylimidazolium trifluoromethanesulfonate, 99.0% Cas 145022-44-2 - used as a solvent to produce Ionic Polymer-Polymer Composites (IP2C) and also in lipase-catalyzed enantioselective amine acylation with 4-pentenoic acid.