A simple colorimetric method for the quality control of 1-alkyl-3-methylimidazolium ionic liquid precursors

John Holbrey, Kenneth Seddon, R. Wareing

Research output: Contribution to journalArticle

93 Citations (Scopus)


A simple colorimetric method to monitor the production of ionic liquid precursors is developed, which is based on the determination of 1-methylimidazole with copper(II) chloride. The synthesis of 1-ethyl-3-methylimidazolium chloride, an industrially important ionic liquid precursor, can be followed and the purity of the final product can be readily assessed in a quick and convenient manner.
Original languageEnglish
Pages (from-to)33-36
Number of pages4
JournalGreen Chemistry
Issue number1
Publication statusPublished - 2001


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