|
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
|
-
|
-
|
Add：Zhongwang town, Jinghai, Tianjin, China Zip code： 301615
Contact：Mr. Bian Shijun (+86-13502007090)
Tel：+86-22-23708931 23708932 81334603
E-mail：bshj123@126.com
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