1-Bromo-4-fluorobutane is primarily used as an intermediate in organic synthesis. It plays a significant role in the preparation of various pharmaceuticals and agrochemicals. The compound is particularly valuable in the development of molecules that require the introduction of both bromine and fluorine atoms, which can enhance biological activity and stability. Additionally, it is utilized in the synthesis of specialty chemicals and materials, where its unique structure contributes to the creation of complex organic compounds. Its application extends to research and development, where it serves as a building block for novel chemical entities in medicinal chemistry and material science.