- Direct Zinc Oxide 99.5% ~90%, etc. - Indirect ZnO: 99.9%~99.7%, etc. - Feed Grade ZnO: 75%~65%, etc. - Calcined ZnO: 99.5%, Zinc Oxide Grades : Indirect process Zinc Oxide, Direct Process Zinc Oxide, Calcined Zinc Oxide, Feed Grade Zinc Oxide, Pharmaceutic Zinc Oxide, nanometer Zinc Oxide, etc. Property: White powder, odourless, relative density 5.606, stable under normal temperature. Insoluble in water and alcohol, soluble in acid, alkaki and amkonium solution. Usage: Used in rubber, dope cable, porcelain enamel, oil, pottery and porcelain, glass and other chemical industry. Packing: in polyethylene film bag with outer polypropylene woven bag, 25kg, 50kg, big sack bag or as required by the customer. 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 Volatile % 0.4 0.4 0.5 0.5 0.5 25kg, 50kg P.P. Woven Bag or as per customer's requirements.