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

pH of 5% solution.......................................................................... 3,5-3,8

MAX. IMPURITIES

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

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

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

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

Oxalate (C2O4)................................................................................. 0,01 %

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

Ammonium (NH4).......................................................................... 0,001 %

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

As............................................................................................. 0,00004 %

Ca................................................................................................... 0,01 %

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

Fe................................................................................................ 0,0005 %

K..................................................................................................... 0,05 %

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

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

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