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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:29209 term browser browse the term
Definition:A sulfur oxide that has formula O6S2.
Synonyms:exact_synonym: 2,2,3,3-tetraoxido-1,4-dioxy-2,3-disulfy-[4]catenate(2-);   bis(trioxidosulfate)(S--S)(2-);   dithionate
 related_synonym: Formula=O6S2;   InChI=1S/H2O6S2/c1-7(2,3)8(4,5)6/h(H,1,2,3)(H,4,5,6)/p-2;   InChIKey=RMGVZKRVHHSUIM-UHFFFAOYSA-L;   SMILES=[O-]S(=O)(=O)S([O-])(=O)=O;   [O3SSO3](2-);   [S2O6](2-)
 xref: CAS:14781-81-8
 cyclic_relationship: is_conjugate_base_of CHEBI:33486

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  CHEBI ontology 400
    chemical entity 400
      molecular entity 400
        inorganic molecular entity 339
          inorganic oxide 8
            sulfur oxide 0
              dithionate(2-) 0
Path 2
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  CHEBI ontology 400
    subatomic particle 400
      composite particle 400
        hadron 400
          baryon 400
            nucleon 400
              atomic nucleus 400
                atom 400
                  main group element atom 393
                    p-block element atom 393
                      chalcogen 349
                        oxygen atom 347
                          oxygen molecular entity 347
                            oxide 16
                              oxoanion 7
                                chalcogen oxoanion 1
                                  sulfur oxoanion 1
                                    dithionate(2-) 0
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