Sodium pyrosulfate

Sodium pyrosulfate
IUPAC name Disodium disulfate
Other names Sodium pyrosulphate; Disulfuric acid disodium salt.
Identifiers
CAS number	13870-29-6 Y
ChEMBL	CHEMBL111016 N
Jmol-3D images	Image 1
SMILES [Na+].[Na+].[O-]S(=O)(=O)OS(=O)(=O)[O-]
Properties
Molecular formula	Na2S2O7
Molar mass	222.12 g/mol
Appearance	Translucent white crystals
Density	2.658 g/cm3
Melting point	400.9 °C
Boiling point	Decomposes at 460 °C
Solubility in water	Soluble
N (verify) (what is: Y/N?) Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
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

• Potassium bisulfate
• Potassium pyrosulfate