NaBr M.W. 102.90 Assay (by argentometry) 98-1.00.5% Impurities with an acidic or alkaline reaction passes test Bromate(BrO3) passes test Chloride(Cl) max 0.5% Iodide(I) passes test Sulphate(SO4) max 0.01% Heavy metals(as Pb) max 0.001% Barium(Ba) passes test Iron(Fe) max 0.002% Magnesium &alkali earth metals max 0.02% Loss on drying (105oC) max 3.0%