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. 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. Chemmol - Web-based molecular structure database, with drawing tool to aid search. Encourages suppliers to register their products. Aminophosphonic Acids and Related Compounds - Provides a database of these compounds. Chemical Synthesis Database - A freely accessible database of chemicals with synthesis references and physical properties. ChemSub - Free web-based database which allows retreival of information on chemical substances. ChemKey Search - Organic synthetic method database with thousands of references. Free demo and ordering information available. e-EROS - The online version of the Encyclopedia of Reagents for Organic Synthesis.