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sulfurous acid
Sign in to saveAlso known as S(O)(OH)2, sulphurous acid, H2SO3, sulfuric(IV) acid
chemical compound
Sulfurous acid is a weak acid formed when sulfur dioxide gas dissolves in water, and it's commonly used as a preservative and bleaching agent in food and industrial processes. It matters because it plays an important role in food safety and manufacturing, though it can also be a respiratory irritant and environmental concern when released into the atmosphere.
AI-generated from the Wikipedia summary — may contain errors.
Chemical data
- Formula
- H2O3S
- Molecular weight
- 82.08 g/mol
- IUPAC name
- sulfurous acid
- SMILES
- OS(=O)O
- InChIKey
- LSNNMFCWUKXFEE-UHFFFAOYSA-N
- XLogP
- -0.5
- Polar surface area
- 76.7 Ų
- H-bond donors
- 2
- H-bond acceptors
- 4
- Formal charge
- 0
via PubChem
Wikidata facts
- Subclass of
- sulfur oxoacid
- Has part
- sulfur
- Mass
- 81.972
Show 7 more facts
- subject has role
- primary metabolite
- Commons category
- Sulfurous acid
- canonical SMILES
- OS(=O)O
- chemical formula
- H₂SO₃
- density
- 1.03
- found in taxon
- Fragaria
- different from
- sulfuric acid
via Wikidata · CC0
~2 min read
Encyclopedic overview
Sulfurous acid (United Kingdom spelling: sulphurous acid) is the chemical compound with the formula H2SO3.
Raman spectra of solutions of sulfur dioxide in water show only signals due to the SO2 molecule and the bisulfite ion, HSO−3. The intensities of the signals are consistent with the following equilibrium:
Excerpted from Wikipedia’s “sulfurous acid” article, available under the CC BY-SA 4.0 licence.