... : odorless, non-toxic, not insolub Features:1) Appearance: white powder, fine powder2) Properties: odorless, non-toxic, not insoluble in water, difficult ... in productions of monocrystal, photo-luminescent pigment, fluorescent powder, high pressure lamp tube, high alumina ceramic4) 99.99% grade, 99.999% grade5 ... 0.5 - 40um6) Loose density: 0.25 - 0.6sqm/g High Purity Alumina