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

MAX. IMPURITIES

Insoluble matter in H2O................................................................... 0,02 %

Non-precipitated substances by HCl (as SO4)............................... 0,03 %

Suitability for COD determination according to UNE 77-004-89......... p/t.

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

Nitrate (NO3).................................................................................. 0,001 %

Ca................................................................................................. 0,002 %

Cd............................................................................................... 0,0005 %

Co............................................................................................... 0,0005 %

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

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

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

Mg................................................................................................ 0,002 %

Na................................................................................................. 0,005 %

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

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

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