Properties: The pure product is a white heavy powder or cubic crystal, while the impure product appears light yellow, pink, or even reddish-brown.(Due to the presence of trace amounts of lanthanum, praseodymium, etc.). Almost insoluble in water and acids. Relative density7.3Melting Point1950℃, boiling point:3500℃. Toxic, median lethal dose(Rat, oral)About1g/kg。

Purpose: Oxidizing agent. Catalyst for organic reactions. Standard sample for rare earth metals in steel analysis. Redox titration analysis. Decolorizing glass. Opacifier for glass and enamel. Heat-resistant alloy. Used as an additive in the glass industry, as a grinding material for plate glass, and also in cosmetics for its anti-ultraviolet effect. Its applications have expanded to the grinding of eyeglass glass, optical lenses, and picture tubes, serving functions such as decolorization, clarification, and absorption of ultraviolet and electron rays in glass.