triphenylphosphite

Triphenyl phosphite is an organophosphorus compound with the chemical formula P(OC₆H₅)₃. It is a colorless liquid with a characteristic pungent odor. This compound is commercially produced by the reaction of phosphorus trichloride with phenol. Triphenyl phosphite is widely used as an industrial chemical.

Its primary applications include its use as a stabilizer in plastics, such as PVC and polyethylene, to prevent degradation caused by heat and light. It also functions as a plasticizer, improving the flexibility and workability of polymers. In the synthesis of other organophosphorus compounds, triphenyl phosphite acts as a precursor or a reagent. It is also employed as an antioxidant and a flame retardant in certain materials. Due to its reactivity, it can be involved in various organic transformations, including phosphorylation reactions. Triphenyl phosphite is generally handled with care due to its potential for skin and eye irritation.