Ethyl 4-bromo-3-ethylbenzoate is primarily used as an intermediate in organic synthesis. It plays a key role in the development of pharmaceuticals, particularly in the creation of active pharmaceutical ingredients (APIs) where its structure is utilized to introduce specific functional groups. Additionally, it is employed in the synthesis of agrochemicals, contributing to the production of herbicides and pesticides. Its bromo and ester groups make it a versatile building block for constructing complex organic molecules in research and industrial applications.