略带微红色的粉末，不溶于水，可溶于无机酸，能迅速吸收空气中的水和二氧化碳。
密度: 7.42 
熔点：2291℃
沸点：3790℃

型号                     高纯5N级                高纯4N级 
稀土纯度RE purity        ≥99.999%               ≥99.99%
稀土杂质REimpurities ppm. 
La2O3                    ≤5                     ≤5
Ceo2                     ≤5                     ≤5
Pr6O11                   ≤5                     ≤5
Nd2O3                    ≤5                     ≤5
Sm2O3                    ≤5                     ≤10
Gd2O3                    ≤5                     ≤10
Tb4O7                    ≤5                     ≤10
Dy2O3                    ≤5                     ≤10
Ho2O3                    ≤5                     ≤5
Er2O3                    ≤5                     ≤5
Tm2O3                    ≤5                     ≤5
Lu2O3                    ≤5                     ≤5
Y2O3                     ≤5                     ≤5
稀土总量TREO             ＞99%                   ≥99%

非稀土杂质Non-RE impurities Ppm
Fe2O3                    ≤5                     ≤5
SiO2                     ≤20                    ≤30
Ca0                      ≤10                    ≤10
CuO                      ≤2                     ≤3
PbO                      ≤2                     ≤5
NiO                      ≤3                     ≤3
ZnO                      ≤10                    ≤10
Cl-                      ≤200                   ≤200
灼烧减量Loss on ignition ＜1%                    ≤1%

	安全说明  26-36 
WGK Germany  2
危险品标志  Xi 
危险类别码  36/37/38 
RTECS  LE8053000

	·主要用作彩色电视和三基色稀土节能灯等用红色荧光粉。
·用于加工其他铕化合物的原料。
密封保存。