... oxide ZnO CAS NO.:1314-13-2 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 ... Physical and chemical properties: white hexagonal system crystal or powder. Relative density is 5.606, refractive index is 2 ... , it is still used in electronic laser material, fluorescent powder, activator, etc. zinc oxide