... Character:white powder purity:99%,99.5%,99.7%,99.9% packing:pp bag Character:white powder purity:99%, ... 99.5%,99.7%,99.9% packing:pp bag & ... and chemical properties: white hexagonal system crystal or powder. Relative density is 5.606, refractive index is ... still used in electronic laser material, fluorescent powder, activator, etc. zinc oxide