Used primarily as an intermediate in organic synthesis, especially in the production of pharmaceuticals and agrochemicals. It serves as a reagent for introducing ethoxy groups or constructing ester and acetate derivatives. Its reactivity makes it valuable in the preparation of chloro-substituted compounds, including certain herbicides and active pharmaceutical ingredients. It is also employed in the synthesis of specialty monomers for polymers due to its ability to undergo controlled hydrolysis and condensation reactions. Handling requires caution due to its moisture sensitivity and potential corrosivity.