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.

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

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Entity of the month

14th June 2022
Potassium carbonate

A team of researchers from Eindhoven University of Technology, TNO and its spin-out company Cellcius have invented a 'heat battery' based on salt and water that can potentially make millions of homes in Europe gas-free in the near future [1]. It took 12 years to design and develop a battery that could be transformed into a scalable solution and comes at a critical time when the EU is looking to wean itself off Russian gas dependence following the invasion of Ukraine [2]. The battery contains no toxic chemicals, rare or precious metals, and the salt contained within it is potassium carbonate (CHEBI:131526) which is harmless, cheap and abundantly available [1].

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