Chemical Entities of Biological Interest (ChEBI) is a freely available dictionary of molecular entities focused on ‘small’ chemical compounds.

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Example: iron*, InChI=1S/H2O/h1H2, water

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User Manual Learn more about the data fields in the ChEBI and data sources for ChEBI. If you are unable to access the online Google document, please use the FTP link to view our manuals.

Train Online Tutorial An online quick tour (0.5 h) and a more detailed tour (1 h) covering much of the material in the User Manual can be found on the EBI Train Online site here.

Statistics Graphs showing the growth of ChEBI, the numbers of curated, submitted and unchecked entries, the numbers of links to other resources and the sources of the information present in ChEBI



SDF files ChEBI provides its chemical structures and additional data in structure-data file (SDF) format.

Ontology files ChEBI ontology is provided in the W3C standard Web Ontology Language (OWL) and OBO formats.

Database files ChEBI is stored in a relational database and we currently provide the ChEBI tables in flat-file tab delimited format, as an Oracle binary dumps and a generic SQL dumps for MySQL and PostgreSQL database.



Archived News...

Entity of the month

1st August 2017

Scientists have long known that birds inhabiting urban environments often use items of human litter to build their nests. In one instance, a species appears to have harnessed the toxic chemicals in discarded cigarette butts in an effort to ward off ectoparasites, such as ticks, from their nests. A team of researchers led by Constantino Macías Garcia at the National Autonomous University of Mexico noticed a peculiar behaviour in house finches (Carpodacus mexicanus) inhabiting the main campus of the university in Mexico City; they were lining their nests with toxic cigarette butts.

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