Purity (metallic): ≥ 99.999 %

Assay (iodometric): ≥ 99.8 %

Chlorine and Bromine (as Cl): ≤ 10 ppm

Ag (Silver): ≤ 0.010 ppm

Al (Aluminium): ≤ 0.050 ppm

Au (Gold): ≤ 0.050 ppm

Ba (Barium): ≤ 0.050 ppm

Be (Beryllium): ≤ 0.005 ppm

Bi (Bismuth): ≤ 0.050 ppm

Ca (Calcium): ≤ 0.10 ppm

Cd (Cadmium): ≤ 0.010 ppm

Co (Cobalt): ≤ 0.010 ppm

Cr (Chromium): ≤ 0.010 ppm

Cu (Copper): ≤ 0.010 ppm

Fe (Iron): ≤ 0.050 ppm

Ga (Gallium): ≤ 0.050 ppm

In (Indium): ≤ 0.010 ppm

K (Potassium): ≤ 0.50 ppm

Li (Lithium): ≤ 0.010 ppm

Mg (Magnesium): ≤ 0.050 ppm

Mn (Manganese): ≤ 0.005 ppm

Mo (Molybdenum): ≤ 0.020 ppm

Na (Sodium): ≤ 0.10 ppm

Ni (Nickel): ≤ 0.010 ppm

Pb (Lead): ≤ 0.050 ppm

Sn (Tin): ≤ 0.050 ppm

Sr (Strontium): ≤ 0.010 ppm

Ti (Titanium): ≤ 0.050 ppm

Tl (Thallium): ≤ 0.050 ppm

V (Vanadium): ≤ 0.005 ppm

Zn (Zinc): ≤ 0.050 ppm