Enzyme Nomenclature Database (ExPASy)
- A repository of information relative to the nomenclature of enzymes.
- http://au.expasy.org/enzyme/

Ecdybase (The Ecdysone Handbook)
- A free online ecdysteroids database. Includes ecdysteroid containing products catalogue.
- http://ecdybase.org/

Physiochemical Properties of Popular Liquids
- Physical properties of over seventy popular solvents and liquids. Sort in ascending or descending order of the desired criteria.
- http://www.trimen.pl/witek/ciecze/liquids.html

Abbreviations of Chemical Compounds
- Searchable database.
- http://www.chemie.fu-berlin.de/cgi-bin/abbscomp

MDL Information Systems GmbH
- Official homepage of the database provider. Contains client software, manuals and links relevant to the CrossFire database.
- http://www.beilstein.com/

ChemKey Search
- Organic synthetic method database with thousands of references. Free demo and ordering information available.
- http://euch6f.chem.emory.edu/

Organic Compounds Database
- Search the database by melting point, boiling point, index of refraction, molecular weight, formula, UV absorption wavelengths, mass spectral peaks, and/or chemical types.
- http://www.colby.edu/chemistry/cmp/cmp.html