5-Bromothiophene-3-carboxylic acid is a functionalized thiophene compound. Thiophene compounds are widely employed in the synthesis of functional materials, and 5-bromothiophene-3-carboxylic acid presents a useful building block for such syntheses. The bromide group is a potential site for carbon-carbon bond formation through cross-coupling protocols, and the carboxylic acid group is also a potential site for functionalization and derivatization.