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

Search for only     All in ChEBI    

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

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Tutorial An introduction to the ChEBI database and ontology, showing users how to search and browse the web/programmatic interface.

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

User Manual Learn more about the data fields in the ChEBI and data sources for 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.



01 June 2015

ChEBI release 128 is now available, with 44656 fully annotated entities.

See our entity of the month, Oleocanthal

With kind regards,
the ChEBI team

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Entity of the month

1st June 2015

The Mediterranean diet is characterised by a relatively high intake of extra-virgin olive oil (EVOO), fruit, unrefined cereals, and vegetables; moderate amounts of fish, poultry and wine; and relatively low amounts of dairy products, red and processed meats. It has been associated with a number of beneficial health properties, including reduced incidences of cardiovascular disease; age-related cognitive disease; colorectal, prostate, and aerodigestive cancers; and a reduction in overall cancer mortality [1-3].

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