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Chemicals A–Z

Browse chemical names from A to Z: 201,301 distinct ChEBI records, with preferred names, source synonyms, CAS cross-references, formulas and downloadable lists. Choose a letter to explore its complete database.

ChEBI 256 · retrieved 11 October 2026 · 2-star and 3-star entries

AChemicals starting with A34,112 matching records6,699 with CAS numbers BChemicals starting with B16,977 matching records4,612 with CAS numbers CChemicals starting with C20,145 matching records5,402 with CAS numbers DChemicals starting with D27,987 matching records7,117 with CAS numbers EChemicals starting with E14,997 matching records3,622 with CAS numbers FChemicals starting with F7,522 matching records1,779 with CAS numbers GChemicals starting with G12,960 matching records1,679 with CAS numbers HChemicals starting with H16,951 matching records4,229 with CAS numbers IChemicals starting with I5,264 matching records1,795 with CAS numbers JChemicals starting with J607 matching records173 with CAS numbers KChemicals starting with K1,949 matching records651 with CAS numbers LChemicals starting with L11,532 matching records2,133 with CAS numbers MChemicals starting with M19,837 matching records5,249 with CAS numbers NChemicals starting with N35,480 matching records5,128 with CAS numbers OChemicals starting with O11,919 matching records2,751 with CAS numbers PChemicals starting with P21,818 matching records5,137 with CAS numbers QChemicals starting with Q676 matching records239 with CAS numbers RChemicals starting with R32,570 matching records3,801 with CAS numbers SChemicals starting with S44,817 matching records5,306 with CAS numbers TChemicals starting with T15,901 matching records4,298 with CAS numbers UChemicals starting with U1,417 matching records495 with CAS numbers VChemicals starting with V2,477 matching records720 with CAS numbers WChemicals starting with W643 matching records221 with CAS numbers XChemicals starting with X872 matching records214 with CAS numbers YChemicals starting with Y335 matching records108 with CAS numbers ZChemicals starting with Z6,655 matching records977 with CAS numbers

A chemical can have more than one name

A substance may appear under multiple letters because different names begin with different letters. Counts within a letter are deduplicated by ChEBI ID; adding letter totals does not give the number of unique substances. Leading punctuation and numeric locants are ignored. Alphabetic prefixes are kept. The source contains synonyms from different languages, abbreviations and trade names.

Every eligible record in the downloaded ChEBI snapshot is included. This does not imply global coverage of every known chemical. Each letter page explains its coverage, annotation levels and naming rules. The original 1,000 detailed CAS profiles remain available with their separate source dates.

Data: ChEBI, EMBL-EBI · CC BY 4.0 · Coverage manifest