No.

Test item name

Specification

1

Content

≥99.0%

2

Clarity

Qualified

3

Dilute sulphuric acid-insoluble substance

≤0.01%

4

Free alkali

Qualified

5

Chloride(Cl)

≤0.001%

6

Sulfur Compounds (Counted by SO4)

≤0.01%

7

Nitrate(NO3)

≤0.003%

8

Manganese (Mn)

≤0.0005%

9

Ferrum(Fe)

≤0.0005%

10

Arsenic (As)

≤0.00005%

11

Plumbum(Pb)

≤0.005%

12

Potassium perman-ganat (Counted by O)

≤0.002%

13

Ammonium sulfide not sediment (Counted by sulphates)

≤0.10%