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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:25812 term browser browse the term
Definition:An elemental molecule with formula O3. An explosive, pale blue gas (b.p. -112degreeC) that has a characteristic, pleasant odour, it is continuously produced in the upper atmosphere by the action of solar ultraviolet radiation on atmospheric oxygen. It is an antimicrobial agent used in the production of bottled water, as well as in the treatment of meat, poultry and other foodstuffs.
Synonyms:exact_synonym: trioxygen
 related_synonym: Formula=O3;   InChI=1S/O3/c1-3-2;   InChIKey=CBENFWSGALASAD-UHFFFAOYSA-N;   O3;   Ozon;   SMILES=[O-][O+]=O;   Trisauerstoff;   [OO2];   ozono;   trioxygene
 xref: CAS:10028-15-6;   Gmelin:1101;   HMDB:HMDB0035409
 xref_mesh: MESH:D010126
 xref: MolBase:931;   PMID:10205911;   PMID:10226494;   PMID:10552743;   PMID:11029342;   PMID:11203434;   PMID:11568152;   PMID:12509241;   PMID:15598576;   PMID:15963550;   PMID:1717074;   PMID:17674823;   PMID:18250191;   PMID:18699586;   PMID:19519548;   PMID:19580672;   PMID:19723209;   PMID:19827485;   PMID:20477724;   PMID:23488636;   PMID:23501341;   PMID:23517299;   PMID:23556239;   PMID:24001808;   PMID:24176344;   PMID:24188305;   PMID:7763188;   PMID:8255146;   PMID:9202716;   Reaxys:4921393;   Wikipedia:Ozone

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Path 1
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  CHEBI ontology 19875
    role 19825
      application 19494
        tracer 3308
          ozone 3297
Path 2
Term Annotations click to browse term
  CHEBI ontology 19875
    subatomic particle 19873
      composite particle 19873
        hadron 19873
          baryon 19873
            nucleon 19873
              atomic nucleus 19873
                atom 19873
                  main group element atom 19763
                    p-block element atom 19763
                      chalcogen 19454
                        oxygen atom 19415
                          oxygen molecular entity 19415
                            elemental oxygen 5765
                              triatomic oxygen 3297
                                ozone 3297
paths to the root