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more general categories information about this item 08. Chemical Category 08. Chemical Category ion [CHEBI:24870] (4391) anion [CHEBI:22563] (3454) organic anion [CHEBI:25696] (3155) carbon oxoanion [CHEBI:35604] (6) hydrogensquarate [CHEBI:59711] (1) polyatomic anion [CHEBI:33273] (2028) oxoanion [CHEBI:35406] (1950) carbon oxoanion [CHEBI:35604] (6) hydrogensquarate [CHEBI:59711] (1) organic ion [CHEBI:25699] (3577) organic anion [CHEBI:25696] (3155) carbon oxoanion [CHEBI:35604] (6) hydrogensquarate [CHEBI:59711] (1) polyatomic ion [CHEBI:36358] (2633) polyatomic anion [CHEBI:33273] (2028) oxoanion [CHEBI:35406] (1950) carbon oxoanion [CHEBI:35604] (6) hydrogensquarate [CHEBI:59711] (1) main group molecular entity [CHEBI:33579] (25650) p-block molecular entity [CHEBI:33675] (25343) chalcogen molecular entity [CHEBI:33304] (15225) oxygen molecular entity [CHEBI:25806] (14414) oxide [CHEBI:25741] (2086) oxoanion [CHEBI:35406] (1950) carbon oxoanion [CHEBI:35604] (6) hydrogensquarate [CHEBI:59711] (1) organooxygen compound [CHEBI:36963] (11352) carbon oxoanion [CHEBI:35604] (6) hydrogensquarate [CHEBI:59711] (1) organochalcogen compound [CHEBI:36962] (11874) organooxygen compound [CHEBI:36963] (11352) carbon oxoanion [CHEBI:35604] (6) hydrogensquarate [CHEBI:59711] (1) carbon group molecular entity [CHEBI:33582] (23847) organic molecular entity [CHEBI:50860] (23769) organic ion [CHEBI:25699] (3577) organic anion [CHEBI:25696] (3155) carbon oxoanion [CHEBI:35604] (6) hydrogensquarate [CHEBI:59711] (1) heteroorganic entity [CHEBI:33285] (15197) organochalcogen compound [CHEBI:36962] (11874) organooxygen compound [CHEBI:36963] (11352) carbon oxoanion [CHEBI:35604] (6) hydrogensquarate [CHEBI:59711] (1) polyatomic entity [CHEBI:36357] (18777) polyatomic ion [CHEBI:36358] (2633) polyatomic anion [CHEBI:33273] (2028) oxoanion [CHEBI:35406] (1950) carbon oxoanion [CHEBI:35604] (6) hydrogensquarate [CHEBI:59711] (1) heteroatomic molecular entity [CHEBI:37577] (13672) oxide [CHEBI:25741] (2086) oxoanion [CHEBI:35406] (1950) carbon oxoanion [CHEBI:35604] (6) hydrogensquarate [CHEBI:59711] (1) ChEBI Compound Accession Identifier: [CHEBI:59711] ChEBI Compound Description: A carbon oxoanion which is a monoanion obtained by the deprotonation of one of the hydroxy groups of squaric acid. ChEBI Compound Identification Number: 59711 ChEBI InChI Value: InChI=1S/C4H2O4/c5-1-2(6)4(8)3(1)7/h5-6H/p-1 ChEBI InChIKey Value: PWEBUXCTKOWPCW-UHFFFAOYSA-M ChEBI Compound Name: hydrogensquarate ChEBI SMILES Value: Oc1c([O-])c(=O)c1=O ChEBI Substance ID: 99319523 ChEBI URL: ChEBI:59711 ChemSpider ID: 4425099 Ontomatica Chemical Accession Key (OnChAKey): PWEBUXCTKOWPCW_UHFFFAOYSA_M_000_000000 PubChem Compound ID: 5259869