Appearance |
White crystallization pellet or crystalline powder |
||
Items |
Photo Grade |
Medical Grade |
Technical Grade |
Main content |
99.5% min |
99.0% min |
98.5% min |
Loss on drying |
0.3% max |
0.5% max |
1.0% max |
Chloride |
0.3% max |
0.6% max |
1.5% max |
Bromate |
0.003% max |
0.003% max |
No reaction |
Iodide |
0.005% max |
0.01% max |
Qualified |
Sulphate |
0.01% max |
0.02% max |
0.1% max |
PH Value(5%) |
5.5—8.0 |
5.5—8.0 |
5.5—10.5 |
As |
0.5ppm max |
4ppm max |
- |
Pb |
0.5ppm max |
4ppm max |
- |
Fe |
1ppm max |
4ppm max |
- |
Cu |
1ppm max |
— |
— |
Transparency test |
Qualified |
— |
— |
Packing |
25kgs PE/pp bags or 1000 kg ton bag packing |