Assay 67%-70%
Color（APHA） ≤5APHA
Chloride (Cl) ≤80ppb
Phosphate (PO4) ≤10ppb
Sulfate (SO4) ≤100ppb
MAXIMUM LIMIT OF IMPURITIES（ppb）
Al ≤1 Li ≤0.1 Ce ≤0.1 Re ≤0.1
Sb ≤0.5 Mg ≤1 Cs ≤0.1 Rb ≤0.1
As ≤0.5 Mn ≤0.1 Dy ≤0.1 Ru ≤0.5
Ba ≤0.1 Mo ≤0.1 Er ≤0.1 Sm ≤0.1
Be ≤0.1 Ni ≤0.5 Eu ≤0.1 Sc ≤0.1
Bi ≤0.1 Nb ≤0.1 Gd ≤0.1 Se ≤1
B ≤1 K ≤1 Hf ≤0.1 Te ≤0.1
Cd ≤0.5 Ag ≤0.1 Ho ≤0.1 Tb ≤0.1
Ca ≤1 Na ≤1 In ≤0.1 Th ≤0.1
Cr ≤1 Sr ≤0.1 La ≤0.1 Tm ≤0.1
Co ≤0.5 Ta ≤0.1 Lu ≤0.1 W ≤0.1
Cu ≤0.5 Tl ≤0.1 Hg ≤0.1 U ≤0.1
Ga ≤0.1 Sn ≤0.5 Nd ≤0.1 Yb ≤0.1
Ge ≤0.1 Ti ≤0.5 Pd ≤0.5 Y ≤0.1
Au ≤0.1 V ≤0.5 Pt ≤0.5 Rh ≤0.5
Fe ≤1 Zn ≤0.5 Pr ≤0.1
Pb ≤0.1 Zr ≤0.1