Abstract Database from Rapra
   Subscription based online library providing information to rubber, plastic, and polymer industries.
   http://abstracts.rapra.net/

Acronym and Abbreviations Database
   About 13000 acronyms and abbreviations related to chemistry.
   http://www.oscar.chem.indiana.edu/cfdocs/libchem/acronyms/acronymsearch.html

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

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

CCOHS: Web Information Services
   Offers subscriptions to chemical databases as well as free access to Chemindex.
   http://ccinfoweb.ccohs.ca/

CHEMnetBASE
   Online access to major chemical reference works from Chapman & Hall/CRC including Combined Chemical Dictionary (CCD), The Handbook of Chemistry & Physics, Polymers: A Property Database, Properties of Organic Compounds.
   http://chemnetbase.com

CML Reference Collection
   Commercial database of more than 120,000 3D molecular structures expressed in CML (Chemical Markup Language) format.
   http://www.randomfactory.com/cml.html

Chem Sources-Online
   Supplier information for approximately 200000 chemical compounds. Searching for compounds is free, the supplier information is fee based.
   http://www.chemsources.com/chemonline.html

ChemBank
   Initiative for Chemical Genetics. Freely available collection of data about small molecules (over 2000 compounds) and resources for studying their properties, especially their effects on biology.
   http://chembank.med.harvard.edu/

ChemExpo
   News, stock reports, products, directories, classifieds, and profiles of commercially available chemical products; focus reports;
   http://www.chemexpo.com

ChemIDplus
   A free database of 350000 chemical compounds. Records consist of name, synonyms, CAS number, molecular formula, and direct links to biomedical resources. Included also over 100000 structures. Searchable by substructure with free Chime plugin.
   http://chem.sis.nlm.nih.gov/chemidplus/

ChemRef
   Database of organic compounds that have been identified in petroleum materials. Includes chromatographic separations, mass spectra, chemical structures, molecular weight, etc.
   http://www.chemref.com

ChemSpider - Database of Chemical Structures and Property Predictions
   ChemSpider is a free chemistry search engine which aggregates and indexes chemical structures and their associated information into a single searchable repository.
   http://www.chemspider.com/

Chemfinder Chemical Directory
   Directory of chemicals, physical properties, and Internet links.
   http://chemfinder.cambridgesoft.com/

Chemical Abstracts Service (CAS)
   Provides pathways to published research in the world's journal and patent literature through tools such as SciFinder, SciFinder Scholar and STN. CAS databases provide access to over 25 million documents, 26 million chemical substances, and 56 million sequ
   http://www.cas.org/

Chemical Kinetics and Thermochemistry Database for High-Temperature Materials Synthesis
   Free database containing thermochemistry data for over 400 compounds relevant to high-temperature processes used in materials synthesis. Searching by molecular formula.
   http://www.ca.sandia.gov/HiTempThermo/

DDBST - Dortmund Data Bank and DDB Software Package
   Database of thermodynamic and transport properties of pure components and mixtures for use in process design and development and related software package.
   http://www.ddbst.de

DETHERM Thermophysical Properties
   Thermophysical properties of pure substances and mixtures. Phase equilibrium data, caloric data, critical data, transport properties, electrolyte data. Data sets with descriptors and bibliographic references.
   http://i-systems.dechema.de/detherm

DIPPR (Design Institute for Physical Property Data) Project 801
   Compilation of reliable physical, thermodynamic, and transport properties for 1,793 industrially important chemical compounds with 44 properties. The database is sponsored by AIChE.
   http://dippr.byu.edu

Derwent World Patents Index
   Comprehensive database of value-added patent documents. 1.5 million patent documents from 41 patent-issuing authorities are added into the database each year.
   http://scientific.thomson.com/products/dwpi/

ESIS: European chemical Substances Information System
   Provides information on chemicals, related to: EINECS, ELINCS, HPVCs & LPVCs, Classification and Labeling, IUCLID Chemical Data Sheets, Risk Assessment.
   http://ecb.jrc.it/esis/

EaSI-Pro
   Dangerous substances database and (inter)national legislation on 200.000 chemicals.
   http://www.easi-pro.com

Engineering Chemistry Databases
   The largest numeric database system in China for chemical, petrochemical, metallurgical industries. Provides experimental data, reference information. Can also perform data estimation.
   http://159.226.63.177/

EuroSpec
   International spectroscopic data bank and archive project for spectroscopic and associated data, from peer reviewed publications, with link to the chemical abstracts register.
   http://www.is-db.org/eurospec/

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.tiscali.cz:8080/~cz050233/indexe.html

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/

IRSLDB-Infrared and Raman Spectroscopy Literature Database
   Bibliography of infrared and Raman spectroscopy and its applications. Provides reference data (title, author(s), journal, page, date info.) collected from 123 journals, grouped into 129 classes.
   http://irsldb.pu-toyama.ac.jp/

IUPAC Compendium of Chemical Terminology
   Also known as the IUPAC Gold Book. Searchable database of nearly 7000 IUPAC-approved definitions of chemical terms. IUPAC - The International Union of Pure and Applied Chemistry.
   http://www.chemsoc.org/goldbook

IUPAC-NIST Solubility Data Series Database
   Comprising 11 volumes from the IUPAC Solubility Data Series liquids with liquids. A limited number of multi-component (organic-water-salt) systems are also included.
   http://srdata.nist.gov/solubility

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
   http://www.iumsc.indiana.edu

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

LiqCryst - Online
   Information about approximately 75000 compounds with liquid crystalline properties. Compound search is free, the compound data are fee based.
   http://liqcryst.chemie.uni-hamburg.de/en/lolas.php

MALDI Database from NIST Polymers Division
   Database of methods, taken largely from the peer-review scientific literature, for matrix-assisted laser desorption ionization (MALDI) mass spectrometry of synthetic polymers.
   http://polymers.msel.nist.gov/maldirecipes/

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

Munir's Pages
   Database containing experimental LogP values together with 2D and calculated 3D structures of more than 500 chemical compounds.
   http://www.essiz.net/muniressiz/chimie/chimie.php

NCI-3D Database
   A free database of more than 120000 substances with 2D and 3D information compiled from the National Cancer Institute. Searchable by substructure with free Chime plugin.
   http://chem.sis.nlm.nih.gov/nci3d/

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/

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

OSHA Search Page
   Database of documents produced by Occupational Safety and Health Administration, including analytical methods and chemical sampling information.
   http://www.osha.gov/pls/oshaweb/owasrch.full_site_search

Organic Reactions on Wiley InterScience
   Comprehensive database of important synthetic reactions, with all published examples of the topic reactions.
   http://www.interscience.wiley.com/db/or

Organic Syntheses
   Describes checked and edited experimental procedures, spanning a broad range of synthetic methodologies. CrossRef(R) and Chemport(R) enabled reference linking.
   http://www.interscience.wiley.com/db/os

Organic Synthesis series
   All annual volumes of Organic Syntheses in ISIS/Base format. Checked and edited experimental synthetic procedures.
   http://www.exchemistry.com/orgsyntheses.html

Polymer Database PoLyInfo
   Provides free access to data required in polymeric material design - structures, names, and properties of monomers and polymers, polymerization information.
   http://polymer.nims.go.jp/polyinfo_top_eng.htm

PubChem
   Free database of chemical structures of small organic molecules and information on their biological activities. Linked with NIH PubMed/Entrez information retrieval system.
   http://pubchem.ncbi.nlm.nih.gov/

Public Chromatography Applications Database
   Contains HPLC and GC applications provided by major vendors of chromatography equipment. Can be searched by numerous chromatographic parameters, as well as by structure, substructure, and structural similarity.
   http://www.chromdb.com

Query Chem
   Chemical search engine powered by the Google Web API.
   http://llama.med.harvard.edu/~jklekota/QueryChem.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.elch.chem.msu.ru/raden/

Reciprocal Net
   Distributed database used by research crystallographers to store information about 3D molecular structures.
   http://www.reciprocalnet.org

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

SDBS, Spectral Database for Organic Compounds
   Integrated spectral database system for organic compounds, which includes the following spectra - Electron Impact Mass (EI-MS), Fourier Transform Infrared (FT-IR), 1H and 13C NMR, Raman and Electron Spin Resonance (ESR).
   http://riodb01.ibase.aist.go.jp/sdbs/

SOLV-DB
   A free database of commercially available solvents searchable by many properties. Compiled by National Center for Manufacturing Sciences.
   http://solvdb.ncms.org/

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

SPRESIweb - InfoChem GmbH
   The new SpresiWeb developed by InfoChem is an integrated scientific database containing over 4.5 million molecules, 3.5 million reactions, 380,000 references, 98,000 patents covering years 1974 - 1999.
   http://www.infochem.de

STM Data
   Data collections from Science, Technology and Medicine (STM): AntiBase (natural compound identifier), AmicBase (antimicrobial activity verifier), Mass Spectra (MS) of Pharmaceuticals and Agrochemicals, Infrared Spectra (IR) of Polymers.
   http://www.wiley-vch.de/stmdata/

Spectra databases for analytical laboratories
   ATR, FT IR, and Raman Spectra of chemicals and other compounds. Includes polymers, solvents, forensics, etc.
   http://www.stjapan.de

Structure Database of Chemicals with Pharmaceutical Activity
   Animations require the Chime plug-in to view. From Oxford University, UK.
   http://www.chem.ox.ac.uk/mom/chemical-database/

Synthesis Reviews Database
   Free database of more than 16000 references to English review articles (from journals and books) of interest to synthetic organic chemists.
   http://www.thieme-chemistry.com/thieme-chemistry/journals/info/freedata/index.shtml

Synthetic Pages
   Free interactive database of practical and reliable organic, organometallic and inorganic chemical syntheses submitted by synthetic chemists.
   http://www.syntheticpages.org/

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/

The IVC-SEP Data Bank for Electrolyte Solutions
   Contains more than 100,000 experimental points concerning the phase behavior and the thermal properties of aqueous solutions containing electrolytes and/or non-electrolytes.
   http://www.ivc-sep.kt.dtu.dk/databank/databank.asp

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

WebReactions - Organic Reaction Retrieval System
   Free reaction search system offering direct retrieval of reaction precedents. Search based on reaction types and bonding change.
   http://webreactions.net

Wiley Database of Polymer Properties
   Physical property data for polymers commercially available, with experimentally determined and selected data for over 2,500 polymers. Derived from the Polymer Handbook.
   http://www.interscience.wiley.com/db/wdpp

Wiley's Scientific, Technical and Medicinal Databases
   Databases covering spectroscopy (SpecInfo - NMR, MS, IR), compound chemistry (Organic Reactions, Organic Syntheses, EROS), materials properties, fundamental life sciences, and medicine.
   http://www3.interscience.wiley.com/browse/?type=DATABASE&titles=true

ZINC
   Free database of over 2.7 million commercially-available compounds for virtual screening in ready-to-dock, 3D format.
   http://zinc.docking.org

eMolecules: Searching the World's Chemistry
   Free chemical structure search engine. Millions of public domain structures. Very fast substructure searching. Results link to data about these structures. Searching for chemical names and synonyms. Finding commercial sources of chemical compounds from ve
   http://www.emolecules.com