Used as a phase-transfer catalyst in organic synthesis, facilitating reactions between compounds in different phases. It is particularly effective in nucleophilic fluorination reactions, where it helps introduce fluorine atoms into organic molecules. This is crucial in the production of pharmaceuticals, agrochemicals, and specialty chemicals. Additionally, it serves as a reagent in the preparation of organofluorine compounds, which are widely used in materials science and medicinal chemistry. Its hydrate form ensures stability and ease of handling in various laboratory and industrial processes.