Cas號 7440-19-9
分子式 ***
分子量 150.35
含量assay   　　　　　　　           ≥99.9%
外觀Appearance                       銀***粉末
總痕量金屬雜質Total trace metal imp. <0.1 %
RE Min%                              99
***/RE%                               99.9
稀土雜質max,%
Pr                                   0.01
Nd                                   0.01
La                                   0.004
Y                                    0.005
Ce                                   0.02
非稀土雜質max,% 
Fe                                   0.03
Si                                   0.01
Mg                                   0.005
Ca                                   0.007
粒度，目                             180~200