... 999%(5N)2.Process: Chemical method3.Size:<1um, other on request4.Analysis: ICP-MS,laser particle analyzer5. ... Physical character:Molecular mass: 144.46Refractive index: 2.51Density: ρ =4.82 ... materials, automatism camera control luminometer, photoconduction drum, laser window materials, infrared double color detectors, photoelectric radiation ...