... NO: 215-222-5Purity: 99.5%, 99.7%, 99.8%, , 98%, 95%Grade Standard: Electron, Rubber, Agriculture, Ceramics, painting, Nano Grade ... , oil, pottery and porcelain, glass and other chemical industry.Specifications- Direct Zinc Oxide 99.5% ~90%, etc.- Indirect ZnO: 99.9%~99.7 ... %, etc.- Calcined ZnO: 99.5%Here is our general specification: (Direct process zinc oxide quality meet standard of GB/T3494-1996 ...