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Sodium tetrathionate

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Sodium tetrathionate dihydrate
Names
IUPAC name
Sodium (sulfonatodisulfanyl)sulfonate dihydrate
Identifiers
3D model (JSmol)
ECHA InfoCard 100.208.917 Edit this at Wikidata
  • InChI=1S/2Na.H2O6S4.2H2O/c;;1-9(2,3)7-8-10(4,5)6;;/h;;(H,1,2,3)(H,4,5,6);2*1H2/q2*+1;;;/p-2
    Key: HAEPBEMBOAIUPN-UHFFFAOYSA-L
  • O.O.[O-]S(=O)(=O)SSS(=O)(=O)[O-].[Na+].[Na+]
Properties
Na2S4O6
Molar mass 306.2665 g/mol (dihydrate)
Appearance white powder
Density 2.1 g/mL (25 ℃)
30.6 g/L (20 ℃)
Hazards
NFPA 704 (fire diamond)
NFPA 704 four-colored diamondHealth 2: Intense or continued but not chronic exposure could cause temporary incapacitation or possible residual injury. E.g. chloroformFlammability 0: Will not burn. E.g. waterInstability 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g. liquid nitrogenSpecial hazards (white): no code
2
0
0
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Sodium tetrathionate is a salt of sodium and tetrathionate with the molecular formula Na2S4O6. The structure of sodium tetrathionate is somewhat like two sodium thiosulfate (Na2S2O3) molecules joined together at the S+2 ends.

Sodium tetrathionate is formed by the oxidation of sodium thiosulfate (Na2S2O3) with liquid iodine (I2).[1] The sodium tetrathionate Na2S4O6 formed can be isolated from the solution by fractional crystallization.

References

  1. ^ Comparative Inorganic Chemistry, Bernard Moody
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