... Molecular Formula: ZnO EINECS NO: 215-222-5 Purity: 99.5%, 99.7%, 99.8%, , 98%, 95 Grade Standard: Electron, Rubber, ... enamel, oil, pottery and porcelain, glass and other chemical industry.Here is our general specification: Direct process zinc ... Oxide (in accordance with dry materials) % ≥ZnO 99.5%ZnO 99%ZnO 98%ZnO 95%ZnO 90%Lead oxide ( ... .40.40.50.50.5contact person: Anne zinc oxide 99% for rubber