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Metabisulfite

Sodium disulfite (13459)

dry, extra pure, meets analytical specification of Ph. Eur., BP, NF, FCC, E 223, assay 97.0 - 100.5%

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General Information

  • Molar Mass
    • 190.11 g/mol
  • CAS Number
    • 7681-57-4

Physical Properties

  • Boiling Point/Range
    • Decomposes on heating.
  • Solubility in Water
    • 20 °C
  • Odor
    • Stinging
  • Color
    • Colorless
  • Physical Form
    • Crystalline powder
  • Density
    • 2.36 g/cm3 20 °C
  • pH
    • 3.5 to 5.0 at 50 g/l 20 °C
  • Vapor Pressure
    • Negligible
  • Melting Point/Range
    • > 150 °C Decomposes without melting

Safety Information

  • Incompatible Materials
    • Oxidizing agents, Contact with strong acids liberates sulphur dioxide
  • Flammability
    • The product is not flammable.
  • Chemical Stability
    • Stable under recommended storage conditions.
  • Thermal Decomposition
    • Decomposes without melting.
  • Self Ignition
    • Not auto-flammable

International Transportation

  • Harmonized System Code
    • 2832100000

General Information

  • Molar Mass
    • 190.11 g/mol
  • CAS Number
    • 7681-57-4

Physical Properties

  • Boiling Point/Range
    • Decomposes on heating.
  • Solubility in Water
    • 20 °C
  • Odor
    • Stinging
  • Color
    • Colorless
  • Physical Form
    • Crystalline powder
  • Density
    • 2.36 g/cm3 20 °C
  • pH
    • 3.5 to 5.0 at 50 g/l 20 °C
  • Vapor Pressure
    • Negligible
  • Melting Point/Range
    • > 150 °C Decomposes without melting

Safety Information

  • Incompatible Materials
    • Oxidizing agents, Contact with strong acids liberates sulphur dioxide
  • Flammability
    • The product is not flammable.
  • Chemical Stability
    • Stable under recommended storage conditions.
  • Thermal Decomposition
    • Decomposes without melting.
  • Self Ignition
    • Not auto-flammable

International Transportation

  • Harmonized System Code
    • 2832100000
  • Molar Mass : 190.11 g/mol
  • CAS Number : 7681-57-4
  • Boiling Point/Range : Decomposes on heating.
  • Solubility in Water : 20 °C
  • Odor : Stinging
  • Color : Colorless
  • Physical Form : Crystalline powder
  • Density : 2.36 g/cm3 20 °C
  • pH : 3.5 to 5.0 at 50 g/l 20 °C
  • Vapor Pressure : Negligible
  • Melting Point/Range : > 150 °C Decomposes without melting
  • Incompatible Materials : Oxidizing agents, Contact with strong acids liberates sulphur dioxide
  • Flammability : The product is not flammable.
  • Chemical Stability : Stable under recommended storage conditions.
  • Thermal Decomposition : Decomposes without melting.
  • Self Ignition : Not auto-flammable
  • Harmonized System Code : 2832100000
Image
SKU
Description
alt
10235125
SODIUM DISULFITE DRY 25,0KS
Property
Value
assay
97.0 - 100.5 %
assay of sulfur dioxide
65.0 - 67.4 %
pH (5 %, 20°C)
3.5 - 5.0
pH (10% solution)
4.0 - 5.0
arsenic (As)
Max. 2 ppm
copper (Cu)
Max. 0.001 %
iron (Fe)
Max. 10 ppm
mercury (Hg)
Max. 1 ppm
lead (Pb)
Max. 2 ppm
selenium (Se)
Max. 5 ppm
zinc (Zn)
Max. 0.001 %
heavy metals (as Pb)
Max. 10 ppm
chloride (Cl)
Max. 0.01 %
thiosulfate (S2O3)
Max. 0.02 %
thiosulfate (S2O3)
complying
appearance of the solution
complying
residual solvents
complying