... -2 4.EINECS:215-222-5 5.Density: 5.606 High-purity and Ultra-fine Zinc OxideAppearance: white or light yellow Powder Melting Point ... °CPhysical Properties:White hexagonal system crystalloid or powder, tasteless, nontoxic, fine particle. It is amphoteric oxide, soluble in acid, NaOH, NH4CL ... to the standard, it can go on to be used. High-purity and Ultra-fine Zinc Oxide