Boron trifluoride ether complex, as a strong Lewis acid catalyst, is widely used in acetylation, alkylation, polymerization, dehydration, condensation and other reactions. Used for the production of butadiene rubber, petroleum resin, Gumaron resin, polyoxymethylene, synthetic resin, etc. As an important catalyst in the pharmaceutical industry. It is the basic raw material for manufacturing high-energy boron hydrogen fuel and extracting isotope boron ¹⁰ B. Can be used as a curing agent for epoxy resin. Used as a common analytical reagent