Sodium Sulphite
|
Name
|
Premium grade
|
First grade
|
Second grade
|
|
Sodium sulphite %≥
|
97
|
96
|
93
|
|
Fe %≤
|
0.003
|
0.005
|
0.01
|
|
Water insoluble matter %
|
0.02
|
0.03
|
0.05
|
|
Free alkali %≤
|
0.1
|
0.4
|
0.6
|
|
Sulfate radical %≤
|
2.5
|
-
|
-
|
|
Sodium chloride %≤
|
0.1
|
-
|
-
|