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SZSE：002741
Chemical Reagents
Sodium thiosulfate?pentahydrateCOA Report
  • CAS No.：10102-17-7
  • Molecular weight：248.18
  • Molecular formula：Na2S2O3·5H2O
  • EC No.：231-867-5
  • HS-No：28323000
Information
Specification category：
Product No. Product name specifications
1.01512.020 Sodium thiosulfate?pentahydrate AR500g
1.01512.030 Sodium thiosulfate?pentahydrate CP500g
1.01512.040 Sodium thiosulfate?pentahydrate AR25kg/drum
1.01512.050 Sodium thiosulfate?pentahydrate CP25kg/drum
1.01512.070 Sodium thiosulfate?pentahydrate AR25kg/Sack
1.01512.090 0.1NSodium thiosulfate(AR)solution AR20L
1.01512.110 Sodium thiosulfate?pentahydrate CP25kg/Sack
1.01512.120 LDNA(Sodium thiosulfate?pentahydrate) CP25kg/Sack
Characteristic： Appearance and properties: Colorless and transparent monoclinic crystal.
pH value: 6.0-8.4(100 g/L H2O,20℃)
Relative density?(water=1): 1.73
Melting point(℃): 48.5
Boiling point(℃): 100
Solubility: Soluble in water and turpentine, insoluble in ethanol.
Technical indicators：
Item AR CP
Assay(Na2S2O3?5H2O) ≥99.0% ≥98.5%
pH valuepH value(50g/L solution,25℃) 6.0~7.5 6.0~7.5
Clarity of solution pass3 pass5
Insoluble matter in water ≤0.005% ≤0.01%
Chloride(Cl) ≤0.02% --
Sulfate and sulfite(as SO4) ≤0.05% ≤0.1%
Sulfide(S) ≤0.00025% ≤0.0005%
Total nitrogen(N) ≤0.005% --
Magnesium(Mg) ≤0.001% --
Calcium(Ca) ≤0.003% ≤0.005%
Iron(Fe) ≤0.0005% ≤0.001%
Heavy metals(as Pb) ≤0.0005% ≤0.001%
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