 It is used as a ligand in organometallic chemistry and as a reagent in organic synthesis

The molecule features a pyramidal phosphorus(III) center bound to three ethoxide groups.Its 31P NMR spectrum features a signal at around +139 ppm vs phosphoric acid standard.Triethylphosphite is prepared by treating phosphorus trichloride with ethanol in the presence of a base, typically a tertiary amine