The halogens include Fluorine(F), Chlorine(Cl), Bromine(Br), Iodine(I) and Astatine(At) which exists in the VIIA clan of Chem.-Physics Periodic table. Astatine(At) is the artificial radioactive element. The Halogen which is pointed out in electronics industry and chemical testing is F, Cl, Br, I. Halogen compounds as flame retardant have been available for electronic parts &material, products casing and plastics. Such kinds of flame retardant can’t recycle. What’s worse, in the progress of burning and heating, it will release some hazardous substances, which will cause continuous environmental