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Active Zinc Oxide SpecificationAppearance (visual inspection):White granuleAssay Content %95-98Cd Content%＜0.025 Loss on drying %1-4Pb Content%＜0.01Cu Content%＜0.001Fe Content%＜0.006 production method To low-grade zinc oxide or zinc ore and zinc raw material,Website:http://www.cbrubberchemical.com, the use of sulfuric acid in the PH value of 5.4 under the condition of leaching and removing impurities, the refined zinc sulfate solution, into the sodium percarbonate zinc carbonate precipitation