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Sulfates

Sodium thiosulfate (13481)

anhydrous, assay (calc. to the dried substance) min. 98%

Overview
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Specifications

General Information

  • Molar Mass
    • 158.11 g/mol
  • CAS Number
    • 7772-98-7
  • Linear Formula
    • Na2S2O3

Physical Properties

  • Color
    • Colorless
  • Vapor Pressure
    • Negligible hectopascal
  • Boiling Point/Range
    • Decomposes on heating.
  • Density
    • 1.67 g/cm3 (20 °C)
  • Odor
    • Odorless
  • Melting Point/Range
    • No data available
  • pH
    • 6.0 to 8.5 at 50 g/l (20 °C)
  • Physical Form
    • Crystalline powder

Safety Information

  • Chemical Stability
    • Stable under recommended storage conditions.
  • Incompatible Materials
    • Acids, Oxidizing agents
  • Flammability
    • The product is not flammable.
  • Thermal Decomposition
    • No decomposition if used as directed.

International Transportation

  • Harmonized System Code
    • 28323000

General Information

  • Molar Mass
    • 158.11 g/mol
  • CAS Number
    • 7772-98-7
  • Linear Formula
    • Na2S2O3

Physical Properties

  • Color
    • Colorless
  • Vapor Pressure
    • Negligible hectopascal
  • Boiling Point/Range
    • Decomposes on heating.
  • Density
    • 1.67 g/cm3 (20 °C)
  • Odor
    • Odorless
  • Melting Point/Range
    • No data available
  • pH
    • 6.0 to 8.5 at 50 g/l (20 °C)
  • Physical Form
    • Crystalline powder

Safety Information

  • Chemical Stability
    • Stable under recommended storage conditions.
  • Incompatible Materials
    • Acids, Oxidizing agents
  • Flammability
    • The product is not flammable.
  • Thermal Decomposition
    • No decomposition if used as directed.

International Transportation

  • Harmonized System Code
    • 28323000
  • Molar Mass : 158.11 g/mol
  • CAS Number : 7772-98-7
  • Linear Formula : Na2S2O3
  • Color : Colorless
  • Vapor Pressure : Negligible hectopascal
  • Boiling Point/Range : Decomposes on heating.
  • Density : 1.67 g/cm3 (20 °C)
  • Odor : Odorless
  • Melting Point/Range : No data available
  • pH : 6.0 to 8.5 at 50 g/l (20 °C)
  • Physical Form : Crystalline powder
  • Chemical Stability : Stable under recommended storage conditions.
  • Incompatible Materials : Acids, Oxidizing agents
  • Flammability : The product is not flammable.
  • Thermal Decomposition : No decomposition if used as directed.
  • Harmonized System Code : 28323000
Property
Value
assay (calc. to the dried substance)
Min. 98 %
loss on drying (105°C, 2 h)
Max. 2 %
pH (5 %, 20°C)
6.0 - 8.5
iron (Fe)
Max. 0.005 %
heavy metals (as Pb)
Max. 0.005 %
chloride (Cl)
Max. 0.15 %
sulfate and sulfite(as SO4)
Max. 1 %
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