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

MAX. IMPURITIES

Insoluble matter in H2O................................................................. 0,003 %

Residue on ignition (as SO4)........................................................... 0,03 %

Reducing substances to KMnO4.......................................................... p/t.

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

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

Phosphate (PO4)......................................................................... 0,0005 %

Nitrate (NO3).................................................................................. 0,002 %

Sulphate (SO4)................................................................................ 0,02 %

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

Cu................................................................................................. 0,002 %

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

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

Pb................................................................................................. 0,002 %