Minimum assay.............................................................................. 98,0 %

MAX. IMPURITIES

Insoluble matter in HNO3.............................................................. 0,005 %

Residue after reduction.................................................................. 0,01 %

Chloride (Cl).................................................................................. 0,005 %

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

Heavy metals (as Pb).................................................................... 0,002 %

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

Cd............................................................................................... 0,0005 %

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

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

Hg(II)................................................................................................. 0,5 %

Ni................................................................................................ 0,0005 %

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

Zn............................................................................................... 0,0005 %