Used as an intermediate in the synthesis of organophosphorus compounds, particularly in the production of pesticides and flame retardants. It is a dialkyl phosphite involved in the Arbuzov and Michaelis–Arbuzov reactions for forming phosphonate esters. Also utilized in the development of lubricant additives to enhance thermal stability and anti-wear properties. Its reactivity makes it suitable for use in specialty chemical manufacturing, including catalysts and stabilizers in polymer systems.