3'-Bromobiphenyl-3-carboxylic acid is primarily utilized in organic synthesis as a building block for the development of more complex chemical compounds. It serves as an intermediate in the production of pharmaceuticals, particularly in the synthesis of active pharmaceutical ingredients (APIs) that target specific biological pathways. The compound is also employed in material science for the creation of advanced polymers and liquid crystals, which are essential in the manufacture of electronic displays and optical devices. Additionally, its bromine moiety makes it a valuable reagent in cross-coupling reactions, such as Suzuki and Heck reactions, which are widely used in the synthesis of fine chemicals and agrochemicals.