sulfurous acid

Also known as S(O)(OH)2, sulphurous acid, H2SO3, sulfuric(IV) acid

chemical compound

AI overview

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.

In the Vinony graph

Vinony's link graph records 240 inbound references to sulfurous acid, and connects out to thiocyanic acid, United Kingdom and oxygen.

Vinony files it under Chembox having GHS data, Chembox image size set and Chemical articles with multiple compound IDs.

Vinony links it to 55 Wikipedia language editions.

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 Å²
H-bond donors: 2
H-bond acceptors: 4
Formal charge: 0

via PubChem

Drug data · ChEMBL

Molecule type: Small molecule

via ChEMBL · EBI

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

Sources (4)

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.