1,4-Dibromonaphthalene is primarily used in organic synthesis as a building block for more complex chemical compounds. It serves as a key intermediate in the production of naphthalene derivatives, which are important in the development of dyes, pigments, and fluorescent materials. Additionally, it is utilized in the synthesis of organic semiconductors and liquid crystals, which are essential components in electronic displays and photovoltaic devices. The compound also finds application in research laboratories for studying reaction mechanisms and developing new chemical processes. Its bromine atoms make it a versatile reagent for various cross-coupling reactions, enabling the creation of diverse organic molecules.