impurities | ≤0.02 ppm Ge (Germanium), ≤0.05 ppm Ga (Gallium), ≤0.01 ppm V (Vanadium), ≤0.01 ppm Li (Lithium), ≤0.02 ppm Tl (Thallium), ≤0.02 ppm Ni (Nickel), ≤0.2 ppm Heavy metals (as Pb), ≤0.1 ppm Ca (Calcium), ≤0.05 ppm Al (Aluminium), ≤0.02 ppm In (Indium), ≤0.2 ppm Na (Sodium), ≤0.01 ppm Pb (Lead), ≤0.02 ppm Ti (Titanium), ≤0.1 ppm K (Potassium), ≤0.02 ppm Zn (Zinc), ≤0.01 ppm Mo (Molybdenum), ≤0.01 ppm Cu (Copper), ≤0.01 ppm As (Arsenic), ≤0.01 ppm Ag (Silver), ≤0.1 ppm Fe (Iron), ≤0.02 ppm Zr (Zirconium), ≤0.1 ppm Bi (Bismuth), ≤0.01 ppm Mn (Manganese), ≤0.01 ppm Ba (Barium), ≤0.5 ppm Sulfate (SO4), ≤0.01 ppm Be (Beryllium), ≤0.05 ppm Au (Gold), ≤0.2 ppm Phosphate (PO4), ≤0.05 ppm Mg (Magnesium), ≤0.01 ppm Cd (Cadmium), ≤0.01 ppm Sr (Strontium), ≤0.02 ppm Cr (Chromium), ≤0.1 ppm Pt (Platinum), ≤1 ppm Fluoride (F), ≤0.2 ppm Chloride (Cl), ≤0.005 ppm Hg (Mercury), ≤0.01 ppm Co (Cobalt) |