Assay (Acidim.)...........................................................................98-102 %
pH of 5% solution.......................................................................... 8,5-9,0
Insoluble matter in H2O................................................................. 0,025 %
Chloride (Cl).................................................................................. 0,005 %
Nitrate (NO3).................................................................................. 0,025 %
Sulphate (SO4)................................................................................ 0,05 %
Cu................................................................................................. 0,002 %
Fe.................................................................................................. 0,002 %
Ni.................................................................................................. 0,002 %
Pb................................................................................................. 0,002 %