Minimum assay (Perm.).................................................................. 99,5 %

MAX. IMPURITIES

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

Loss on drying at 105°C................................................................. 0,01 %

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

Neutrality.............................................................................................. p/t.

Chloride (Cl).................................................................................. 0,002 %

Phosphate (PO4)........................................................................... 0,005 %

Sulphate (SO4).............................................................................. 0,002 %

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

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

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

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

K................................................................................................... 0,005 %

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

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