Send us a Message



Submit Data |  Help |  Video Tutorials |  News |  Publications |  Download |  REST API |  Citing RGD |  Contact   

CHEBI ONTOLOGY - ANNOTATIONS

The Chemical Entities of Biological Interest (ChEBI) ontology is downloaded weekly from EMBL-EBI at http://www.ebi.ac.uk/chebi/. The data is made available under the Creative Commons License (CC BY 3.0, http://creativecommons.org/licenses/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:oxygen-18 atom
go back to main search page
Accession:CHEBI:33815 term browser browse the term
Definition:The stable isotope of oxygen with relative atomic mass 17.999160 and 0.205 atom percent natural abundance.
Synonyms:related_synonym: (18)8O;   (18)O;   Formula=[18O];   InChI=1S/O/i1+2;   InChIKey=QVGXLLKOCUKJST-NJFSPNSNSA-N;   SMILES=[18O];   heavy oxygen;   oxygen, isotope of mass 18;   oxygen-18;   schwerer Sauerstoff
 xref: CAS:14797-71-8;   Gmelin:17562


GViewer not supported for the selected species.

show annotations for term's descendants           Sort by:

Term paths to the root
Path 1
Term Annotations click to browse term
  CHEBI ontology 2
    chemical entity 2
      atom 2
        nonmetal atom 2
          oxygen atom 1
            oxygen-18 atom 0
              ((18)O)water 0
Path 2
Term Annotations click to browse term
  CHEBI ontology 2
    subatomic particle 2
      composite particle 2
        hadron 2
          baryon 2
            nucleon 2
              atomic nucleus 2
                atom 2
                  main group element atom 2
                    p-block element atom 2
                      chalcogen 2
                        oxygen atom 1
                          oxygen-18 atom 0
                            ((18)O)water 0
paths to the root