|
Index item
|
Qualified grade
|
|
Purity
|
99.5% min
|
|
Freezing Point
|
16℃
|
|
Sulfates
|
0.0005% max
|
|
Chloride
|
0.0004% max
|
|
Residue on evaporation
|
0.02% max
|
|
Sulfate(as SO4), % ≤
|
0.0002% max
|
|
Iron (as Fe), % ≤
|
0.001% max
|
