Technical indexes
|
Item
|
Indices
|
|
purity% ≥
|
99.6
|
|
sulphate group % ≤
|
0.08
|
|
heavy metal % ≤
|
0.001
|
|
Iron content % ≤
|
0.0012
|
|
chlorides % ≤
|
0.003
|
|
calcium % ≤
|
0.0012
|