4,4'-Bis(2-bromoacetyl)biphenyl is an organic compound featuring a biphenyl core symmetrically substituted with bromoacetyl groups at the para positions. It is a white to off-white crystalline powder with a molecular formula of C₁₆H₁₂Br₂O₂. This compound is a key bifunctional building block, where the biphenyl unit provides rigidity and conjugation, while the reactive bromoacetyl groups serve as handles for further chemical transformations. Its primary application is in the field of materials science, specifically as a precursor for the synthesis of organic light-emitting diodes (OLEDs) and other organic electronic materials. The bromoacetyl groups can undergo various coupling reactions, such as Suzuki or Heck reactions, or be converted into other functional groups to construct complex π-conjugated systems, host materials, or electron-transporting materials essential for OLED device fabrication. As a versatile synthetic intermediate, it is also employed in academic and industrial research for constructing polymers, dendrimers, and molecular frameworks requiring a rigid, linear biphenyl linkage with reactive terminals. Proper handling is required due to the lachrymatory nature of bromoacetyl compounds and their potential skin and eye irritation.