Potassium Bromide molecular formula：KBr molecular weight：119 1.uses: This product is used as sensitive emulsion of cinema film and photographic film, or for formulating developer and used as sedative etc. In medication. 2.Standard Item Index Export Grade Photo Grade Appearance white crystal white crystal Assay(as NaBr)% ≥ 99.0 99.5 Moisture %≤ 0.5 0.3 Sulphate(as SO4)%≤ 0.01 0.003 Chloride(as Cl)%≤ 0.3 0.1 Iodide(as I)%≤ passed 0.01 Bromate(as BrO3)%≤ 0.003 0.001 Heavy metal(as Pb)%≤ 0.0005 0.0005 Iron(as Fe)%≤ 0.0002 degree of Clearance passed passed PH(10% solution at 25 degree C) 5-8 5-8 Transmittance 5% at410nm 93.0-100.00 Deoxidize experience(to KMnO4) the red unchanged above half hour 3.Shape and Properties:This product is white crystal. It is free of smell and tastes salty and slightly bitter, with specific gravity 2.75(25℃)，melting point of 734℃，and boiling point of 1435℃，It can dissolve water and glycerine, hardly dissolves in alcohol and ether with slightly deliquescence and under sunlight it will become yellow easily. 4.Notification:The product should be completely packed and stored in ventilated and dry storehouses, and guard against damp and keep in dark place, in case of fire it can be put out by water. 5.Package: 25kg each by knitting bag with plastic inside.