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/CH4O/c1-2/h2H,1H3, caffeine

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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.


Entity of the month

1st May 2019

Glyphosate (CHEBI:27744, trade name: Roundup), is an organophosphorus compound discovered by a team of scientists led by Dr John Franz and brought to market for agricultural use in 1974 by Monsanto. It is the most widely used systemic broad-spectrum herbicide and crop desiccant in the US; in 2014, total worldwide consumption of glyphosate stood at 826 million kg [1]. After its patent expired in 2000, the chemical began to be sold by several manufacturers and is a constituent in more than 750 products being sold in the US [2]. Despite this competition, Monsanto is still a dominant player in the market and focusses its strategy on genetically modified (GM) glyphosate resistant crops.

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