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1-hexadecyl-3-methylimidazolium bromide is an imidazolium-based ionic liquid that can be used as an effective corrosion inhibitor and extractant. In acidic environments, it adsorbs onto the surface of metals (such as low-carbon steel) to form a protective barrier, significantly slowing down the rate of metal corrosion [1]. In aqueous solutions, it forms aggregates that effectively dissolve and extract hydrophobic organic compounds (such as polycyclic aromatic hydrocarbons) [2].

[1] Jianhong Tan . (2020). Electrochemical and Computational Studies on the Corrosion Inhibition of Mild Steel by 1-Hexadecyl-3-methylimidazolium Bromide in HCl Medium. International Journal of Electrochemical Science, 15 3, Pages 1893-1903. https://doi.org/10.20964/2020.03.36
[2] Verónica Pino . (2008). The ionic liquid 1-hexadecyl-3-methylimidazolium bromide as novel extracting system for polycyclic aromatic hydrocarbons contained in sediments using focused microwave-assisted extraction. Journal of Chromatography A, 1182 2, Pages 145-152. https://doi.org/10.1016/j.chroma.2008.01.009