Assay (Compl.)......................................................................98,0-101,0%

pH of 5% solution.......................................................................... 3,5-6,0

MAX. IMPURITIES

Insoluble matter in H2O................................................................. 0,005 %

Oxidizing and reducing substances (as I)................................... 0,0065 %

Non-precipitated substances by S(NH4)2.......................................... 0,2 %

Sulphate (SO4).............................................................................. 0,005 %

Heavy metals (as Pb).................................................................. 0,0005 %

Ca................................................................................................. 0,005 %

Cu............................................................................................... 0,0005 %

Fe................................................................................................ 0,0005 %

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

Mg................................................................................................ 0,005 %

Na................................................................................................... 0,02 %

Ni.................................................................................................. 0,002 %

Pb............................................................................................... 0,0005 %

Zn................................................................................................. 0,005 %