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

pH of 5% solution.......................................................................... 4,2-4,5

MAX. IMPURITIES

Insoluble matter in H2O................................................................... 0,01 %

Loss on drying at 105°C................................................................... 0,2 %

Nitrogen compounds (as N)......................................................... 0,002 %

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

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

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

As............................................................................................... 0,0001 %

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

Cd................................................................................................. 0,001 %

Co................................................................................................. 0,001 %

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

Fe.................................................................................................. 0,002 %

Mg................................................................................................ 0,001 %

Mn................................................................................................ 0,001 %

Na................................................................................................... 0,05 %

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

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

Zn................................................................................................. 0,001 %