CHEBI:48854 - sulfurous acid

Main ChEBI Ontology Automatic Xrefs Reactions Pathways Models
ChEBI Name sulfurous acid
ChEBI ID CHEBI:48854
Stars This entity has been manually annotated by the ChEBI Team.
Secondary ChEBI IDs CHEBI:9344, CHEBI:26837
Supplier Information
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Formula H2O3S
Net Charge 0
Average Mass 82.08008
Monoisotopic Mass 81.972
InChI InChI=1S/H2O3S/c1-4(2)3/h(H2,1,2,3)
InChIKey LSNNMFCWUKXFEE-UHFFFAOYSA-N
SMILES OS(O)=O
Roles Classification
Chemical Role(s): inorganic acid
A Bronsted acid derived from one or more inorganic compounds. Inorganic acids (also known as mineral acids) form hydrons and conjugate base ions when dissolved in water.
(via chalcogen oxoacid )
Bronsted acid
A molecular entity capable of donating a hydron to an acceptor (Bronsted base).
(via oxoacid )
View more via ChEBI Ontology
ChEBI Ontology
Outgoing sulfurous acid (CHEBI:48854) is a sulfur oxoacid (CHEBI:33402)
sulfurous acid (CHEBI:48854) is conjugate acid of hydrogensulfite (CHEBI:17137)
sulfurous acid (CHEBI:48854) is tautomer of sulfonic acid (CHEBI:29214)
Incoming hydrogensulfite (CHEBI:17137) is conjugate base of sulfurous acid (CHEBI:48854)
sulfino group (CHEBI:48855) is substituent group from sulfurous acid (CHEBI:48854)
sulfonic acid (CHEBI:29214) is tautomer of sulfurous acid (CHEBI:48854)
IUPAC Names
dihydrogen trioxosulfate
dihydroxidooxidosulfur
sulfurous acid
trioxosulfuric acid
Synonyms Sources
[SO(OH)2] IUPAC
acide sulfureux ChEBI
ácido sulfuroso ChEBI
H2SO3 IUPAC
S(O)(OH)2 IUPAC
schweflige Säure ChemIDplus
Sulfite KEGG COMPOUND
Sulfurous acid KEGG COMPOUND
sulphurous acid ChemIDplus
Database Links Databases
C00019662 KNApSAcK
C00094 KEGG COMPOUND
c0348 UM-BBD
SO3 PDBeChem
View more database links
Registry Numbers Types Sources
1458 Gmelin Registry Number Gmelin
7782-99-2 CAS Registry Number ChemIDplus
Last Modified
28 July 2014