POTASSIUM CHLORIDE 99.50% AR - 500 GMAssay min 99.5-100.5%pH(2% solution) 5.5-8.5Insoluble matter in water max 0.01%Bromide(Br) max 0.01%Iodide(I) max 0.002%Sulphate(SO4) max 0.005%Phosphate(PO4) max 0.005%Total Nitrogen(N) max 0.001%Heavy metals(as Pb) max 0.0005%Iron(Fe) max 0.0002%Calcium(Ca) max 0.001%Barium(Ba) max 0.001%Magnesium(Mg) max 0.0005%Sodium(Na) max 0.02%Loss on drying(1300C) max 0.2%