Appearance
|
White crystallization pellet or crystalline powder
|
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Items
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Photo Grade
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Medical Grade
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Technical Grade
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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
|