Yttrium Oxide Formula: Y2O3; M. Wt: 225. 82 RE purity: Min 99. 998% RE impurities: La2O3 max 0. 5 ppm; Ce2O3 max 0. 5ppm; Pr6O11 max 0. 5 ppm; Nd2O3 max 0. 5ppm; Sm2O3 max 0. 5ppm; Eu2O3 max 1ppm; Gd2O3 max 0. 5ppm; Tb4O7 max 1ppm; Dy2O3 max 1ppm; Ho2O3 max 1ppm; Er2O3 max 1ppm; Tm2O3 max 0. 5ppm; Yb2O3 max 0. 5ppm; Lu2O3 max 0. 5ppm TREO: Min99% Non-RE impurities: Fe2O3 max 3ppm; SiO2 max 20ppm; CaO max 8ppm; Cl- max110ppm; CuO max 0. 5ppm; PbO max 2ppm; NiO max 0. 5ppm; ZnO max 5ppm Loss on ignition: Max 1% DESCRIPION: White powder, Insoluble in water, soluble in acids.  USES: Widely used in the preparing of various phosphor, good quality refractory material, artificial jewels, laser crystal, super-conductor and in the field of sophisticated technique.  PACKING: According to the requirements of clients.