| Assay (complexometric, ZnO calculated on ignited substance) |
99.0 - 100.5 % |
| Assay (complexometric, ZnO) |
≥ 99.0 % |
| Identity |
passes test |
| Carbonate and color of solution |
passes test |
| Substances insoluble in diluted sulfuric acid |
≤ 0.01 % |
| Free Alkali |
passes test |
| Chloride (Cl) |
≤ 0.001 % |
| Nitrate (NO₃) |
≤ 0.003 % |
| Sulfur compounds (as SO₄) |
≤ 0.01 % |
| Total nitrogen (N) |
≤ 0.0005 % |
| As (Arsenic) |
≤ 0.0001 % |
| Ca (Calcium) |
≤ 0.001 % |
| Cd (Cadmium) |
≤ 0.0005 % |
| Cu (Copper) |
≤ 0.0005 % |
| Fe (Iron) |
≤ 0.0005 % |
| K (Potassium) |
≤ 0.01 % |
| Mg (Magnesium) |
≤ 0.005 % |
| Mn (Manganese) |
≤ 0.0005 % |
| Na (Sodium) |
≤ 0.001 % |
| Pb (Lead) |
≤ 0.002 % |
| Substances reducing potassium permanganate (as O) |
≤ 0.001 % |
| Loss on ignition (500 °C) |
≤ 1.0 % |
