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Find a chemical. Check the evidence. Follow the source.
ChEBI release 255 · September 2026
Explore the chemical directory
View all substancesOrganic/Inorganic Small Molecule
Defined organic and inorganic structures
Salt and Compound With
Salts, hydrates and multi-component records
Element
Elements and elemental substances
Coordination Compound
Central atoms with coordinated ligands
Mineral
Naturally occurring inorganic materials
Protein/Peptide Sequence
Amino-acid-based molecular structures
Class names follow CAS Substance Classes. Record grouping is by PubCAS using ChEBI data, not an official CAS assignment. All 19 substance classes
Organic heterocyclic compound
ChEBI ontology family
Carboxylic acid
ChEBI ontology family
Inorganic salt
ChEBI ontology family
Organosulfur compound
ChEBI ontology family
Alcohol
ChEBI ontology family
Ester
ChEBI ontology family
Phenols
ChEBI ontology family
Lipid
ChEBI ontology family
Organochlorine compound
ChEBI ontology family
Ether
ChEBI ontology family
Ketone
ChEBI ontology family
Amino acid
ChEBI ontology family
Oxide
ChEBI ontology family
Organofluorine compound
ChEBI ontology family
Hydrocarbon
ChEBI ontology family
Mineral
ChEBI ontology family
Amine
ChEBI ontology family
Coordination entity
ChEBI ontology family
Elemental molecular entity
ChEBI ontology family
Nucleoside
ChEBI ontology family
Hydrate
ChEBI ontology family
Aldehyde
ChEBI ontology family
Carbohydrate
ChEBI ontology family
Organic salt
ChEBI ontology family
Organophosphorus compound
ChEBI ontology family
Metal oxide
ChEBI ontology family
Peptide
ChEBI ontology family
Isotopically modified compound
ChEBI ontology family
Families use ChEBI ontology relationships. A substance may belong to more than one family.
Find substances containing an element in their reported formula.
Commonly used substances
Browse directory →| Substance | CAS number |
|---|---|
| Cerium(IV) oxide Organic/Inorganic Small Molecule | 1306-38-3 |
| Ethanol Organic/Inorganic Small Molecule | 64-17-5 |
| Water Organic/Inorganic Small Molecule | 7732-18-5 |
| Aluminium oxide Organic/Inorganic Small Molecule | 1344-28-1 |
| Acetone Organic/Inorganic Small Molecule | 67-64-1 |
| Sodium chloride Salt and Compound With | 7647-14-5 |