Customization: | Available |
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Certification: | CIQ, ISO, SGS |
Purity: | ≥99% |
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Audited by an independent third-party inspection agency
1. Molecular formula: Na2S2O2·5H2O
2, Molecular weight: 248.17
3, Properties: monoclinic crystal, Melting point : 40-45, Relative density :1.729(17).
4, Specification:
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 |
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Granularity(g/g) |
12~16 |
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