KI M.W. 166.00  Assay(KI) 99.0-100.5%  Insoluble matter in water max 0.01% Nitrate , Nitrite and ammonia passes test Chloride and bromide (as Cl) max 0.05% Free alkali(as K2CO3) passes test Sulphate(SO4) max 0.015% Iodate(IO3) max 0.0003% Thiosulphate(S2O3) max 0.005% Heavy metals(as Pb) max 0.001% Iron(Fe) max 0.001% Loss on drying(1050C) max 1.0%