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

MAX. IMPURITIES

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

Darkened substances by H2SO4........................................................... p/t.

Chloride (Cl).................................................................................. 0,001 %

Sulphate (SO4)................................................................................ 0,01 %

Ammonium (NH4).......................................................................... 0,002 %

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

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

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

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