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 July 2015

ChEBI release 129 is now available, with 45310 fully annotated entities.

See our entity of the month, Butyl anthranilate

With kind regards,
the ChEBI team

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Entity of the month

1st July 2015
Butyl anthranilate

Insects destroy a very large fraction (thought to be up to 40%) of the global agricultural output and necessitate use of millions of tons of toxic insecticides and insect repellents that are environmentally unfriendly and can be harmful to other species including humans. Finding safe and effective repellents is, therefore, a top priority for agrochemical companies.

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