Zinc oxide manufacturer ,we use Indirect process to produce ,the purity is much higher and steady . 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, ...