It is a kind of Br-N flame retardants with good weather resistance. The product with larger molecule structure has white appearance and excellent light resistance, which avoids the relevant disadvantages existing in the Decabromodiphenyl oxide. It is deemed to be the replacement of the DECA and TBBA as its excellent thermal stability, electrical performance and light resistance. Widely used in the modified engineering plastics such as HIPS, ABS /PC, PBT, PC, ABS, AS and ect.