- Chemical Abstracts Service (CAS) - World's largest and most comprehensive chemical database with over 21 million document records and 37 million substances listed.
- 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.
- 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.
- Database Searching at Liverpool - Chemistry Literature Searching (BIDS ISI, ISIS, Camb Struc Data, Beilstein, journals).
- SPECS and BioSPECS B.V. - Provider of chemical compound library's for HTS in vials or plates.
- JAICI - JAICI is a not-for-profit scientific information service organization featuring, in particular, chemical expertise.
- MDLI Information Systems - Provider of chemical structural databases and information management software to the chemical, agrochemical, and pharmaceutical industry.
- Hazardous Chemical Database - Contains names, formulas and registry numbers for 1991 hazardous chemicals. This site was last updated in 1996.
- NIST Chemistry WebBook - Database of organic chemistry compounds, organized by species. Contains chemical and physical property data on over 30,000 compounds.
- 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.
- 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.
- FTIRsearch.com - Search a database of 87,000 FTIR and Raman spectra using text or full spectral comparison. JAVA required.
- 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.
- 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
- 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.
- 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.
- Nanogen Index 2 - Offers a book containing data on over 3000 pesticides and other environmental contaminants.
- Derwent Information - Chemical, pharmaceutical and biotechnological databases, covering patents, journals and conferences.
- 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.
- 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.
- CML Reference Collection - Commercial database of more than 120,000 3D molecular structures expressed in CML (Chemical Markup Language) format.
- 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.
- 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.
- 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.
- 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.
- WebReactions - Organic Reaction Retrieval System - Free reaction search system offering direct retrieval of reaction precedents. Search based on reaction types and bonding change.
- SOLV-DB - A free database of commercially available solvents searchable by many properties. Compiled by National Center for Manufacturing Sciences.
- Chem Sources-Online - Supplier information for approximately 200000 chemical compounds. Searching for compounds is free, the supplier information is fee based.
- 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.
- ChemExpo - News, stock reports, products, directories, classifieds, and profiles of commercially available chemical products; focus reports;
- LiqCryst - Online - Information about approximately 75000 compounds with liquid crystalline properties. Compound search is free, the compound data are fee based.
- 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.
- Abstract Database from Rapra - Subscription based online library providing information to rubber, plastic, and polymer industries.
- 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.
- Structure Database of Chemicals with Pharmaceutical Activity - Animations require the Chime plug-in to view. From Oxford University, UK.
- Acronym and Abbreviations Database - About 13000 acronyms and abbreviations related to chemistry.
- 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.
- 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.
- 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.
- Polymer Database PoLyInfo - Provides free access to data required in polymeric material design - structures, names, and properties of monomers and polymers, polymerization information.
- Synthesis Reviews Database - Free database of more than 16000 references to English review articles (from journals and books) of interest to synthetic organic chemists.
- ChemBank - Small Molecule Bioactives Database - Chemical structures and biological activity data for over 2,000 compounds, primarily from published sources.
- 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.
- Synthetic Pages - Free interactive database of practical and reliable organic, organometallic and inorganic chemical syntheses submitted by synthetic chemists.
- Organic Syntheses - Free electronic version of printed Organic Syntheses series - detailed reliable experimental methods for the synthesis of organic compounds.
- 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.
- 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.
- OSHA Search Page - Database of documents produced by Occupational Safety and Health Administration, including analytical methods and chemical sampling information.
- Organic Syntheses - Describes checked and edited experimental procedures, spanning a broad range of synthetic methodologies. CrossRef(R) and Chemport(R) enabled reference linking.
- Organic Reactions on Wiley InterScience - Comprehensive database of important synthetic reactions, with all published examples of the topic reactions.
- Chemfinder Chemical Directory - Directory of chemicals, physical properties, and Internet links.
- 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.
- Organic Synthesis series - All annual volumes of Organic Syntheses in ISIS/Base format. Checked and edited experimental synthetic procedures.
- 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.
- Spectra databases for analytical laboratories - ATR, FT IR, and Raman Spectra of chemicals and other compounds. Includes polymers, solvents, forensics, etc.
- ZINC - Free database of over 2.7 million commercially-available compounds for virtual screening in ready-to-dock, 3D format.
- EuroSpec - International spectroscopic data bank and archive project for spectroscopic and associated data, from peer reviewed publications, with link to the chemical abstracts register.
- PubChem - Free database of chemical structures of small organic molecules and information on their biological activities. Linked with NIH PubMed/Entrez information retrieval system.
- Reciprocal Net - Distributed database used by research crystallographers to store information about 3D molecular structures.
- Munir's Pages - Database containing experimental LogP values together with 2D and calculated 3D structures of more than 500 chemical compounds.
- 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.
- 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.
- Thermodata - Databases and software for thermochemistry.
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