Boron trifluoride–methanol complex（Cat No.:M080445）is a Lewis acid reagent formed by the coordination of boron trifluoride (BF₃) with methanol. This stabilized liquid complex is commonly used in organic synthesis, particularly for esterification and transesterification reactions, as well as in the formation of acetals and ketals. Its strong electrophilic character enhances the reactivity of carbonyl compounds and facilitates mild, efficient catalytic processes. Compared to anhydrous BF₃ gas, the BF₃–methanol complex is easier to handle and store, making it a practical choice in both laboratory and industrial chemical transformations.