Molecular formula: NaBr CAS No.: 7647-15-6 Appearance: White crystallization pellet or crystalline powder Items Photo Grade Medical Grade Technical Grade Main content 99.5% min 99.0% min 98.5% min Loss on drying 0.3% max 0.5% max 1.0% max Chloride 0.3% max 0.6% max 1.5% max Bromate 0.003% max 0.003% max No reaction Iodide 0.005% max 0.01% max Qualified Sulphate 0.01% max 0.02% max 0.1% max PH Value(5%) 5.5¡ª8.0 5.5¡ª8.0 5.5¡ª10.5 As 0.5ppm max 4ppm max £ Pb 0.5ppm max 4ppm max £ Fe 1ppm max 4ppm max £ Cu 1ppm max ¡ª ¡ª Transparency test Qualified ¡ª ¡ª