NaHCO3 M.W. 84.01 Assay 99.7-100.5% Identity passes test Appearance of solution passes test Insoluble matter max 0.015% Carbonate passes test pH max 8.6 Chloride(Cl) max 0.003% Nitrogen compounds(N) max 0.001% Phosphate(PO4) max 0.005% Silicate(SiO2) max 0.005% Sulphate(SO4) max 0.003% Ammonium(NH4) max 0.0005% Arsenic(As) max 0.0002% Calcium(Ca) max 0.005% Copper(Cu) max 0.0005% Iron(Fe) max 0.001% Lead(Pb) max 0.0005% Magnesium(Mg) max 0.005% Potassium(K) max 0.005% Substances reducing iodine(I) max 0.0065% Loss on drying max 0.25%