Customization: | Available |
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CAS No.: | 7772-98-7 |
Formula: | Na2s2o3 |
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Item | Photographic grade | Industrial grade | Anhydrous grade |
Appearance | colorless transparent crystal | colorless transparent crystal | white powder |
Assay | ≥ 99.00% | ≥ 98.5% | ≥ 97.0% |
Water Insoluble matter | ≤ 0.01% | ≤ 0.03% | ≤ 0.03% |
Sulfide | ≤ 0.001% | ≤ 0.003% | ≤ 0.001% |
Fe | ≤ 0.001% | ≤ 0.003% | ≤ 0.005% |
PH | 6.5~9.5 | 6.5~9.5 | 6.5~9.5 |
Water solution reaction | in accordance with the test | in accordance with the test | ---- |
Granularity(g/g) | 12~16 | --- | ---- |