Minimum assay (Iodom.)................................................................ 99,0 %

pH of 5% solution.......................................................................... 6,0-8,4

MAX. IMPURITIES

Insoluble matter in H2O................................................................... 0,01 %

Loss on drying at 105°C......................................................................1 %

Chloride (Cl).................................................................................... 0,05 %

Sulphate and Sulphite (as SO4)........................................................ 0,5 %

Sulphide (S)................................................................................ 0,0005 %

Ca................................................................................................. 0,004 %

Cd................................................................................................. 0,001 %

Co................................................................................................. 0,001 %

Cu................................................................................................. 0,001 %

Fe.................................................................................................. 0,001 %

K..................................................................................................... 0,01 %

Ni.................................................................................................. 0,001 %

Pb................................................................................................. 0,001 %

Zn................................................................................................. 0,001 %