User Survey : Help improve ChEBI - please click here to take part in our quick User Survey.

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

Advanced Search | About ChEBI


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.



Archived News...

Entity of the month

1st August 2016
Isobutyl butyrate

Compounds of interest in the fight against malaria have featured many times in ChEBI's Entity of the Month [1-6], and in recent years the number of cases of the disease has fallen markedly, due in no small part to the widespread adoption of insecticide-treated bednets (ITNs) and indoor residual spraying (IRS). Nevertheless, the disease continues to kill around a thousand people every day, of whom roughly 700 are children under the age of 5. More than 90% of the deaths occur in sub-Saharan Africa, where Plasmodium falciparum, the most dangerous species of the malaria parasite, predominates.

Read more ...