Chemical Abstracts Service (CAS) World's largest and most comprehensive chemical database with over 21 million document records and 37 million substances listed. http://www.cas.org/

Chemcyclopedia Plus An annual supplement to Chemical & Engineering News (C&EN). Provides users/purchasers of chemicals with trade names, packaging, special shipping requirements, potential applications, and CAS Registry Numbers. Chemicals are listed in categories. http://pubs.acs.org/chemcy/

Agency for Toxic Substances and Disease Registry Searchable database for publications and resources about the effect of hazardous substances on public health and the environment. http://www.atsdr.cdc.gov/search

Database Searching at Liverpool Chemistry Literature Searching (BIDS ISI, ISIS, Camb Struc Data, Beilstein, journals). http://www.liv.ac.uk/Chemistry/Library/DatabaseSearching.html

SPECS and BioSPECS B.V. Provider of chemical compound library's for HTS in vials or plates. http://www.specs.net

JAICI JAICI is a not-for-profit scientific information service organization featuring, in particular, chemical expertise. http://www.jaici.or.jp/english/index_e.htm

MDLI Information Systems Provider of chemical structural databases and information management software to the chemical, agrochemical, and pharmaceutical industry. http://www.mdli.com

Hazardous Chemical Database Contains names, formulas and registry numbers for 1991 hazardous chemicals. This site was last updated in 1996. http://ull.chemistry.uakron.edu/erd/

NIST Chemistry WebBook Database of organic chemistry compounds, organized by species. Contains chemical and physical property data on over 30,000 compounds. http://webbook.nist.gov/chemistry/

The ChemExper Chemicals Directory A catalog of 60000 fine chemicals searchable for free using a chemist-friendly search engine. Products are listed with physical data including IR spectra and MSDS. Contributions to the database possible with dedicated (and free) program. http://www.chemexper.com/

Thermodata Databases and software for thermochemistry. http://thermodata.online.fr/thermang/anglais.html

RADEN Data Bank Is designed for compilation of experimental researches and calculations of the RADiative and ENergy parameters defining the distribution of intensity in electronic and vibrational spectra of diatomic molecules. http://www.chem.msu.ru/homes/raden/index.htm

FTIRsearch.com Search a database of 87,000 FTIR and Raman spectra using text or full spectral comparison. JAVA required. http://ftirsearch.com

Fydat - Physical Property Database Point properties and thermodynamic and transport properties of over 500 common organic compounds and gases. Program calculates mixture properties. Demo version available. http://home.worldonline.cz/~cz050233/indexe.html

Indiana University Molecular Structure Center Small molecule database of structures that have primarily been determined using single crystal X-ray diffraction. Features JAVA applets that can be used to orient and examine the molecule, and a dedicated Beowulf computer system to generate high quality rendered images. Currently contains over 2,500 molecules. http://www.iumsc.indiana.edu

Risk Management Internet Services - Chemical Databases MSDS, toxicology profiles, chemical health hazards, chemical labeling requirements, TLVs, government lists of hazardous substances, pesticide information, storage compatibility, and chemical safety guides. Use of site requires paid subscription. http://www.rmis.com/db/dbchemicals.htm

Analytical Science and Instruments Limited Providing information to the scientific community on all aspects of the analytical sciences in education, chemical suppliers, consultancies, instrumentation and research. http://www.analytical-science.com

Nanogen Index 2 Offers a book containing data on over 3000 pesticides and other environmental contaminants. http://www.nanogens.co.uk/

Derwent Information Chemical, pharmaceutical and biotechnological databases, covering patents, journals and conferences. http://www.derwent.com/chemistry/

CCINFOweb Web access to health and safety databases covering over 185000 chemical substances. Provided by Canadian Centre for Occupational Health (CCOHS). Free access to CHEMINFO database. http://ccinfoweb.ccohs.ca/aboutCCINFOweb.html