Bromine is the raw material to make organic and inorganic bromide. And also it can be used to make flame retardant and shockproof of pertrol and other air fuel. In medical field, it is used to produce potassium bromide, sodium bromide,chloramphenicol and aureomycin. Bromine is also the material to produce insecticide, fumigant and growth hormone for plant. In dying field, it can be used to produce coloring matter. It can also be used to make silver bromide which is the main material to produce films. In petrochemical field, bromine is used to produce Dibromethane and Dibromopropane. Besides, it is widely used in many field such as mill run, metallurgy,food, chemical analysis and water processing.