sodium thiosulfate pentahydrate Cas:10102-17-7

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sodium thiosulfate pentahydrate

Sodium thiosulfate pentahydratedisodium,dioxido-oxo-sulfanylidene-λ<sup>6</sup>-sulfane,pentahydrate
molecular formula: H10Na2O8S2
Molecular weight: 248.18400
Physical Properties:
Appearance and Properties: Translucent crystal or white powder
Density: 1.01 g/mL at 25 °C
Boiling point: 100ºC
Melting point: 48.5 °C
Water solubility: 680 g/L (20 ºC)
Stability: Stable. Incompatible with strong acids, iodine, mercury.

Items of Analysis Standard of Analysis Test Results
Assay ≥99.0% 99.52%
Insoluble in water ≤0.005% 0.0016%
Chloride ≤0.02% <0.02%
Heavy metal (Pb) ≤0.0005% <0.0005%
Sulfates and Sulfites ≤0.05% <0.05%
pH (50g/L, 25oC) 6.0-7.5 6.57
Ca ≤0.003% <0.003%
Fe ≤0.0005% <0.0005%
Mg ≤0.001% 0.0003%
Sulfide ≤0.00025% <0.00025%
Total Nitrogen ≤0.005% <0.005%
Conclusion Conforms to AR Standard

The photosensitive industry is used as a photographic fixer. The paper industry is used as a chlorine remover after pulp bleaching. In the printing and dyeing industry, it is used as a dechlorination agent for cotton fabrics after bleaching. Analytical chemistry is used as a reagent for chromatographic analysis and volumetric analysis. It is used as detergent and disinfectant in medicine. Food industry is used as chelating agent, antioxidant, etc.
Package and Storage:
The warehouse is ventilated and dry at low temperature, and stored separately from oxidants, halogens and strong acids

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