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EI-0140 (OTTO) 1-Ethyl-3-methylimidazolium bromide, dry, ≥98.5% (HPLC/T) Cas 65039-08-9 - used to prepare 1-ethyl-3-methylimidazolium bis((trifluoromethyl)sulfonyl)imide and 1-ethyl-3-methylimidazolium tetrafluoroborate