Methyltrioctylammonium bromide

crystals

Methyltrioctylammonium bromide exhibits strong reorientation at the interface due to its three long alkyl chains and likely does not form micelles in solution[1]. The compound serves as a cation precursor for synthesizing fatty acid anion-based ionic liquids, such as methyltrioctylammonium hexanoate, stearate, and oleate[2]. It acts as a hydrogen bond acceptor to prepare lauric-hydrophobic deep eutectic solvents by mixing with lauric acid, where infrared spectroscopy confirms hydrogen-bond formation within the mixture[3].

[1] Dopierala, K., & Prochaska, K. (2008). The effect of molecular structure on the surface properties of selected quaternary ammonium salts. Journal of Colloid and Interface Science, 321(1), 220–226. https://doi.org/10.1016/j.jcis.2008.01.049
[2] Blanco, D., Rivera, N., Oulego, P., Díaz, M., González, R., & Battez, A. H. (2019). Novel fatty acid anion-based ionic liquids: Contact angle, surface tension, polarity fraction and spreading parameter. Journal of Molecular Liquids, 288, 110995. https://doi.org/10.1016/j.molliq.2019.110995
[3] Huynh, T. N., Le, T. M. Q., Nguyen, S. H., Trinh, A. D., & Tran, Q. H. (2026). Lauric acid-based hydrophobic deep eutectic solvent for efficient Cr(VI) recovery: Kinetics, thermodynamics, and real-world application. Inorganic Chemistry Communications, 189, 116635. https://doi.org/10.1016/j.inoche.2026.116635