≥ ZnO 99% ZnO 99.5% ZnO 99.7% ZnO 99.8% ZnO 99.9% Metallic Zinc (in accordance with Zn) % 0.01 None None None None Lead oxide (PbO)%≤ 0.05 0.05 0.037 0.001 0.001 Cadmium oxide (CdO) % ≤ -- -- -- 0.0005 0.0005 Cupric oxide (CuO) % ≤ 0.0004 0.0004 0.0002 0.0002 0.0002 As ≤ -- -- -- 0.0005 0.0005 Manganese (Mn) % ≤ 0.0258 0.0001 0.0001 -- -- Ferro Oxide (FeO) % ≤ -- -- 0.001 -- -- Muriatic Acid Insoluble Substance % ≤ 0.01 0.008 0.006 0.004 0.004 Loss On Ignition % ≤ 0.2 0.2 0.2 -- -- Water Insoluble Substance % ≤ 0.2 0.2 0.1 -- -- Volatile 105°C % ≤ 0.5 0.4 0.3 0.3 0.3 Sieve Residue (45um mesh ) % ≤ 0.1 0.1 0.1 0.1 0.1 Surface Area % ≥ 40 45 50 60 60 Oil Absorption g/100g ≤ -- -- 14 -- -- Reducing Power (compared with standard sample) % ≥ -- -- 100 -- -- Direct process zinc oxide quality meet standard of GB/T3494-1996 Item/Parameter Standard Zinc Oxide (in accordance with dry materials) % ≥ ZnO 99.5% ZnO 99% ZnO 98% ZnO 95% ZnO 90% Lead oxide (PbO)% ≤ 0.12 0.2 1.0 3.0 4.0 Cadmium oxide (CdO) % ≤ 0.02 0.05 -- -- -- Cupric oxide (CuO) % ≤ 0.006 -- -- -- -- Manganese (Mn) % ≤ 0.0002 -- -- -- -- Metallic Zinc (in accordance with Zn) % None None -- -- -- Muriatic Acid Insoluble Substance % ≤ 0.03 0.04 0.5 0.7 2.0 Loss On Ignition % ≤ 0.4 0.6 0.7 1.0 5.0 Water Soluble Substance % ≤ 0.4 0.6 0.7 1.0 3.0 Sieve Residue (45um mesh ) % ≤ 0.28 0.32 0.5 0.5 0.5
