3-Bromoaniline is an aromatic organic compound featuring a bromine atom substituted at the meta position of an aniline ring. It appears as a light yellow to brown liquid or crystalline solid with a molecular formula of C6H6BrN and a molecular weight of 172.02 g/mol. This compound serves as a fundamental building block in organic synthesis, particularly valued for its dual functional groupsбкa reactive bromine for cross-coupling reactions (e.g., Suzuki, Buchwald-Hartwig) and a primary amine for further derivatization. In pharmaceutical research, 3-bromoaniline is widely utilized as a key intermediate in the synthesis of small-molecule drug candidates, including kinase inhibitors, receptor modulators, and other bioactive compounds. Its meta-substitution pattern imparts unique electronic and steric properties, making it a preferred fragment for constructing complex heterocyclic systems and drug-like scaffolds. Additionally, it is employed in the production of agrochemicals, dyes, and specialty polymers. Due to its versatility and commercial availability, 3-bromoaniline is a staple in both academic and industrial chemical laboratories.