Trihexylamine is widely used as a catalyst and intermediate in organic synthesis, particularly in the production of pharmaceuticals and agrochemicals. Its ability to act as a base makes it valuable in reactions like alkylations and condensations. In the petroleum industry, it serves as a corrosion inhibitor and additive in lubricants, enhancing performance and extending equipment life. Additionally, it is utilized in the extraction and purification of metals, especially in solvent extraction processes for rare earth elements. Its hydrophobic nature also makes it suitable for use in formulations of surfactants and emulsifiers.