... in acid and alkaline solution Zinc Oxide 99%,99.5%,99.7% 1.Zinc Oxide Grades : Indirect process Zinc Oxide, Direct Process Zinc Oxide, Calcined Zinc Oxide, Feed Grade Zinc Oxide, Pharmaceutic Zinc Oxide, nanometer Zinc Oxide ... , stable under normal temperature. Insoluble in water and alcohol, soluble in acid, alkaki and amkonium solution. 3.Usage: Used in rubber, dope cable, porcelain ...