... Cu) % ≤0.0100.010Sieve Residue(45um)4-2015 Direct Zinc Oxide 99.5% ~90%, etc. - Indirect ZnO: 99.9%~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 ... in water and alcohol, soluble in acid, alkaki and amkonium solution.Usage: Used in rubber, dope cable, porcelain enamel, oil, ...