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

Identity..............................................................................................IR p/t.

MAX. IMPURITIES

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

Residue on ignition (as SO4)........................................................... 0,02 %

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

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

Phosphate (PO4)........................................................................... 0,001 %

Oxalate (C2O4)................................................................................. 0,05 %

Sulphur compounds (as SO4)....................................................... 0,002 %

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

As............................................................................................. 0,00001 %

Ca............................................................................................... 0,0025 %

Cu............................................................................................. 0,00005 %

Fe................................................................................................ 0,0003 %

Mg.............................................................................................. 0,0005 %

Ni................................................................................................ 0,0002 %

Pb............................................................................................... 0,0002 %