- Abbreviations of Chemical Compounds - Searchable database.
- Aminophosphonic Acids and Related Compounds - Provides a database of these compounds.
- Challenging Problems in Chemistry and Chemical Biology - Project to provide access to problems created in conjunction with the teaching activities in advanced courses in organic chemistry and chemical biology.
- Chemical Synthesis Database - A freely accessible database of chemicals with synthesis references and physical properties.
- ChemKey Search - Organic synthetic method database with thousands of references. Free demo and ordering information available.
- Chemmol - Web-based molecular structure database, with drawing tool to aid search. Encourages suppliers to register their products.
- ChemSub - Free web-based database which allows retrieval of information on over 237,000 chemical substances.
- e-EROS - The online version of the Encyclopedia of Reagents for Organic Synthesis.
- Ecdybase (The Ecdysone Handbook) - A free online ecdysteroids database. Includes ecdysteroid containing products catalogue.
- Enzyme Nomenclature Database (ExPASy) - A repository of information relative to the nomenclature of enzymes.
- 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.
- Physiochemical Properties of Popular Liquids - Physical properties of over seventy popular solvents and liquids. Sort in ascending or descending order of the desired criteria.
