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Disodium disulfite

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Disodium disulfite

Molecular formula: Na2O5S2 CAS# 7757-74-6
Categories: Inorganic salt
PubChem CID: 24346 | NSC 158277 | NSC 227243 | ChemSpider ID: 22762
Names
English:
7681-57-4
Disodium disulfite
Disodium disulphite
Disodium metabisulfite
Disodium pyrosulfite
Disulfurous acid, disodium salt
EINECS:231-673-0
Pyrosulfurous acid, disodium salt
disodium sulfinato sulfite

Variants of the formula:

Na2S2O5
Na^+/0O^-\S|O`|/O\S|O`|/O^-\0Na^+
Elemental composition
Can't show the diagram.
Symbol Element Atomic weight Number of atoms Mass percent

Reactions in which Disodium disulfite is involved

  • 2Na2S2O4 "52^oC"--> Na2SO3S + Na2S2O5
  • 2Na2S2O4 + O2 -> 2Na2S2O5
  • 3Na2S2O5 + 2H[AuCl4] + 3H2O → 2Au + 3Na2SO4 + 8HCl + 3SO2
  • Na2S2O5 + H2O ">80^oC"--> 2NaHSO3