Tri-n-butylamine, alias: tributylamine; tri-n-butylamine; tributylamine. Colorless to slightly yellow liquid. Freezing point is less than -70℃, boiling point is 216-217℃, relative density (20/20℃) is 0.7782, refractive index (nD20) is 1.4297, easily soluble in alcohol and ether, insoluble in water, has a special smell, and is hygroscopic.