Categories |
Industrial Grade |
Steel Grade |
Ceramic Grade |
Fluorescence grade |
Optical Grade |
High Purity |
||
Content not less than (%) |
93.0 |
96.0 |
98.0 |
99.0 |
99.8 |
99.99 |
||
Impurity content not more than (%) |
Na |
0.05 |
0.01 |
0.002 |
||||
K |
0.05 |
0.01 |
0.002 |
|||||
Ca |
||||||||
Mg |
0.5 |
0.1 |
0.05 |
0.05 |
0.02 |
|||
Si |
1% |
0.5 |
0.1 |
0.05 |
0.01 |
0.002 |
||
SO4 |
0.5 |
0.1 |
0.05 |
0.03 |
0.01 |
0.005 |
||
Fe |
0.1 |
0.05 |
0.05 |
0.001 |
0.0005 |
0.0001 |
||
Cl |
0.1 |
0.1 |
0.05 |
0.05 |
0.01 |
0.001 |
||
Al |
0.1 |
0.1 |
0.05 |
0.02 |
0.002 |
0.001 |
||
Cu |
0.05 |
0.02 |
0.002 |
0.001 |
0.0005 |
0.0002 |
||
Heavy metals (Pb) |
0.05 |
0.02 |
0.002 |
0.001 |
0.0005 |
0.0002 |