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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.

Term:dithionic acid
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Accession:CHEBI:29208 term browser browse the term
Definition:A sulfur oxoacid that has formula H2O6S2.
Synonyms:exact_synonym: 1,4-dihydrido-2,2,3,3-tetraoxido-1,4-dioxy-2,3-disulfy-[4]catena;   bis(hydroxidodioxidosulfur)(S--S)
 related_synonym: Formula=H2O6S2;   H2S2O6;   InChI=1S/H2O6S2/c1-7(2,3)8(4,5)6/h(H,1,2,3)(H,4,5,6);   InChIKey=RMGVZKRVHHSUIM-UHFFFAOYSA-N;   SMILES=[H]OS(=O)(=O)S(=O)(=O)O[H];   [(HO)(O)2SS(O)2(OH)];   hypodisulfuric acid
 xref: CAS:14970-71-9;   Gmelin:82514
 cyclic_relationship: is_conjugate_acid_of CHEBI:33486

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Path 1
Term Annotations click to browse term
  CHEBI ontology 932
    chemical entity 932
      atom 917
        nonmetal atom 856
          sulfur atom 231
            sulfur molecular entity 231
              sulfur oxoacid 51
                dithionic acid 0
Path 2
Term Annotations click to browse term
  CHEBI ontology 932
    subatomic particle 917
      composite particle 917
        hadron 917
          baryon 917
            nucleon 917
              atomic nucleus 917
                atom 917
                  main group element atom 866
                    p-block element atom 863
                      chalcogen 828
                        oxygen atom 774
                          oxygen molecular entity 774
                            hydroxides 698
                              oxoacid 331
                                chalcogen oxoacid 60
                                  sulfur oxoacid 51
                                    dithionic acid 0
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