Sodium pyrosulfate

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Sodium pyrosulfate[1]
Sodium pyrosulfate.png
CAS number 13870-29-6 YesY
Jmol-3D images Image 1
Molecular formula Na2S2O7
Molar mass 222.12 g/mol
Appearance Translucent white crystals
Density 2.658 g/cm3
Melting point 400.9 °C (753.6 °F; 674.0 K)
Boiling point decomposes at 460 °C (860 °F; 733 K)
Solubility in water Soluble
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
 N (verify) (what is: YesY/N?)
Infobox references

Sodium pyrosulfate is a salt of sodium and pyrosulfate, obtained by the dehydration of sodium bisulfate. This is an intermediate stage in the preparation of sulfur trioxide.

See also[edit]


  1. ^ Olsen, J. C., ed. (1934). Van Nostrand's Chemical Annual. London: Chapman and Hall.