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The Chemical Entities of Biological Interest (ChEBI) ontology is downloaded weekly from EMBL-EBI at The data is made available under the Creative Commons License (CC BY 3.0, For more information see: Degtyarenko et al. (2008) ChEBI: a database and ontology for chemical entities of biological interest. Nucleic Acids Res. 36, D344–D350.

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Accession:CHEBI:33538 term browser browse the term
Definition:A sulfur oxoanion that has formula HO2S.
Synonyms:related_synonym: (hydroxythio)oxidanide;   Formula=HO2S;   InChI=1S/H2O2S/c1-3-2/h1-2H/p-1;   InChIKey=HRKQOINLCJTGBK-UHFFFAOYSA-M;   SMILES=[H]OS[O-]
 xref: Gmelin:323188
 cyclic_relationship: is_conjugate_acid_of CHEBI:29821;   is_conjugate_base_of CHEBI:33536

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Path 1
Term Annotations click to browse term
  CHEBI ontology 19781
    chemical entity 19781
      atom 19779
        nonmetal atom 19659
          sulfur atom 16304
            sulfur molecular entity 16304
              sulfur oxoanion 538
                hydroxidooxidosulfate(1-) 0
Path 2
Term Annotations click to browse term
  CHEBI ontology 19781
    subatomic particle 19779
      composite particle 19779
        hadron 19779
          baryon 19779
            nucleon 19779
              atomic nucleus 19779
                atom 19779
                  main group element atom 19669
                    p-block element atom 19669
                      chalcogen 19401
                        oxygen atom 19364
                          oxygen molecular entity 19364
                            oxide 11713
                              oxoanion 8883
                                chalcogen oxoanion 539
                                  sulfur oxoanion 538
                                    hydroxidooxidosulfate(1-) 0
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