4-bromo-N-(4-bromophenyl)-N-phenylaniline, chemical formula is C18H13Br2N, CAS number 81090-53-1, molecular weight is 403.11, a functional intermediate of aromatic amine photoelectric material, organic semiconductor intermediate. At present, it is widely used as the light-emitting layer host material, the transmission layer material, and the barrier layer material of the OLED. White powder, conventional purity ≥99.0%, Shangsai Optoelectronics can further improve the quality standard through a series of synthetic methods in combination with customized requirements, inert atmosphere, and protected from light.