KCl M.W. 74.56 5 kg Assay min 99.5-100.5% pH(2% solution) 5.5-8.5 Insoluble 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%