Hg(NO3) 2.H2O M.W. 342.62  Assay(ex Hg) min 98.0% Residue after reduction max 0.05% Chloride(CI) max 0.005% Sulphate(SO4) max 0.01% Iron(Fe) max 0.005% Potassium(K) max 0.01% Sodium(Na) max 0.01%