CHEBI:52141 - squaric acid

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ChEBI Name squaric acid
ChEBI ID CHEBI:52141
Definition A carbon oxoacid that consists of 1,2-diketocyclobut-3-ene bearing two enolic hydroxy substituents at positions 3 and 4.
Stars This entity has been manually annotated by the ChEBI Team.
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Formula C4H2O4
Net Charge 0
Average Mass 114.05630
Monoisotopic Mass 113.995
InChI InChI=1S/C4H2O4/c5-1-2(6)4(8)3(1)7/h5-6H
InChIKey PWEBUXCTKOWPCW-UHFFFAOYSA-N
SMILES Oc1c(O)c(=O)c1=O
Roles Classification
Chemical Role(s): Bronsted acid
A molecular entity capable of donating a hydron to an acceptor (Bronsted base).
(via oxoacid )
Biological Role(s): metabolite
Any intermediate or product resulting from metabolism. The term 'metabolite' subsumes the classes commonly known as primary and secondary metabolites.
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ChEBI Ontology
Outgoing squaric acid (CHEBI:52141) has role metabolite (CHEBI:25212)
squaric acid (CHEBI:52141) is a alicyclic ketone (CHEBI:36132)
squaric acid (CHEBI:52141) is a carbon oxoacid (CHEBI:35605)
squaric acid (CHEBI:52141) is conjugate acid of hydrogensquarate (CHEBI:59711)
Incoming squaric acid dibutyl ester (CHEBI:53612) has functional parent squaric acid (CHEBI:52141)
hydrogensquarate (CHEBI:59711) is conjugate base of squaric acid (CHEBI:52141)
IUPAC Name
3,4-dihydroxycyclobut-3-ene-1,2-dione
Synonyms Sources
1,2-Diketo-3,4-dihydroxycyclobutene ChemIDplus
1,2-dioxo-3,4-dihydroxycyclobut-3-ene ChEBI
1,2-dioxo-3,4-dihydroxycyclobutene ChEBI
3,4-dihydroxy-3-cyclobutene-1,2-dione NIST Chemistry WebBook
Quadratic acid ChemIDplus
Quadratsäure ChemIDplus
Manual Xref Database
Squaric_acid Wikipedia
View more database links
Registry Numbers Types Sources
2892-51-5 CAS Registry Number ChemIDplus
2892-51-5 CAS Registry Number NIST Chemistry WebBook
774275 Beilstein Registry Number Beilstein
774275 Reaxys Registry Number Reaxys
Last Modified
01 September 2015