Synonyms: N/A CAS: 7681-11-0 Molecular Formula: KI Molecular Weight: 166.00 g/mol Test Specification Appearance White crystals Assay 99.0% min. pH of a 5% solution 6.0 to 9.2 at 25°C Insoluble matter 0.005% max. Loss on drying at 150°C 0.2% max. Chloride and bromide 0.01% max. Iodate (IO3) 3 ppm max. Phosphate (PO4) 0.001% max. Sulfate (SO4) 0.005% max. Barium (Ba) 0.002% max. Heavy metals (as Pb) 5 ppm max. Iron (Fe) 3 ppm max. Calcium (Ca) 0.002% max. Magnesium (Mg) 0.001% max. Sodium (Na) 0.005% max.