Item | Index |
|||
High-grade |
Super-grade |
First-grade |
||
Content(calculated with NaBrO3) % ≥ |
99.7 |
99.5 |
99.0 |
|
PH value(5w/v) |
6.5±1 |
6.5±1 |
6.5±1 |
|
Light absorbency(20% solution) % ≤ |
0.12 |
---- |
---- |
|
Water % ≤ |
0.1 |
0.1 |
0.2 |
|
Bromide(calculated with NaBr) % ≤ |
0.05 |
0.05 |
0.1 |
|
Sulphate(calculated with SO4 % ≤ |
0.01 |
0.01 |
0.02 |
|
Iron(Fe) % ≤ |
0.0005 |
---- |
---- |
|
Arsenic(As) % ≤ |
0.0002 |
0.0002 |
0.0003 |
|
Chloride and chlorate(with C1) % ≤ |
0.05 |
0.03 |
0.1 |
|
Heavy metal (calculated with Pb) % ≤ |
0.0005 |
0.0005 |
0.001 |