Chemical Data Sources

• Britannica Online

The Web version of the Encyclopaedia Britannica is an excellent source for general articles on scientific topics, and for biographical articles on noted scientists. Articles contain the full text of the print encyclopedia, as well as links to some relevant Web sites outside Britannica.
• NIST Reference on Constants, Units and Uncertainty

This National Institute of Standards and Technology has a searchable and browsable list of the important physical constants with bibliography, as well as a thorough description of the SI system of units and a description of methods of expressing degree of uncertainty in measurements. An excellent reference site.
• The Laws List

This collection of laws, rules and constants in physics, compiled by Erik Max Francis, includes a number of interest in physical chemistry, e.g. the gas laws, Rydberg formula, etc.
• WebElements

WebElements is a hypertext-linked collection of property data on the first 112 elements including (where available): general, chemical, physical, nuclear, electronic, biological, geological, crystallographic, reduction potential, isotopic abundances, electronic configurations, ionization enthalpy data and additional textual information, especially on the history of the elements.
• Visual Elements Periodic Table

This site, created by the Chemical Society, is notable for its artistic displays of each element and "periodic landscapes" - computer generated three-dimensional images of various physical properties of the elements. A history of the periodic table is included, as well as basic physical properties of each element (the latter require an Adobe Acrobat reader.)
• Table Of The Nuclides

The Table of the Nuclides first presents a map of all known nuclides. Each horizontal row represents one element; colored dots indicate the known isotopes of that element. A vertical column represents the nuclides with same neutron numbers. By clicking on a region of the chart, you may see a more detailed chart section. From the colors on the chart, you can get an idea of the life time of a nuclide. By clicking on a cell, you can get properties of the nuclide or atom.
• NMR Periodic Table of the Elements

This is a compilation of magnetic resonance data on the elements in periodic table form, compiled by the NMR facility at Texas A&M University.
• NIST Online Physical Data

This site contains links to the NIST collections of physical data which have so far been made available over the web, plus a catalog of other NIST data collections.
• NIST Chemistry Webbook

The NIST WebBook will provide access to the full array of data compiled and distributed by NIST under the Standard Reference Data Program. The current edition, the Chemistry WebBook, contains, among other data:
(1) Thermodynamic data on an extensive set of organic and small inorganic compounds - Enthalpy of formation, Heat capacity and Entropy for over 5000 compounds.
(2) A large set of ion-energetics data - Ionization potential and Appearance potential for over 14,000 compounds.
(3) IR spectra, mass spectra and electronic/vibrational spectra data for thousands of compounds.
(4) Reaction thermochemistry data for over 8000 reactions.
(5) Constants of diatomic molecules (spectroscopic data) for over 6000 compounds.
(6) Thermophysical property data for 16 fluids
Data on specific compounds may be located by name, formula or CAS Registry Number.
• ChemFinder WebServer

This database, provided by CambridgeSoft, provides basic physical data and links to websites containing other data for a large number of chemical compounds. It is searchable by name, molecular weight, molecular formula, CAS Registry Number or structure (uploaded in SMILES string format).
• WWW Chemical Structures Databases

This set of databases, created by the Computer Chemistry Center at the University of Erlangen, includes the WWW Chemical Structure Database, containing more than 2250 automatically collected chemical structures from the Internet, complete with information about the referring HTML pages. It is searchable by name, CAS Registry Number, molecular formula and other data, as well as by structure (uploaded in SMILES string format). Also available are collections of 3D structure coordinates, GIF and VRML renditions of molecules and more. An excellent site.
 
 
• CODATA Key Values for Thermodynamics

The Committee on Data for Science and Technology (CODATA) has conducted a project to establish internationally agreed values for the thermodynamic properties of key chemical substances. This table presents the final results of the project. Use of these recommended, internally consistent values is encouraged in the analysis of thermodynamic measurements, data reduction, and preparation of other thermodynamic tables. The table includes the standard enthalpy of formation at 298.15 K, the entropy at 298.15 K, and the quantity H ° (298.15 K)-H °(0). A value of 0 in the Delta_fH ° column for an element indicates the reference state for that element. The standard state pressure is 100000 Pa (1 bar).
• Organic Compounds Database

This database, compiled at Virginia Tech and made available by Colby College, provides physical data on a large number of organic compounds, including molecular weight, melting point, boiling point, index of refraction and UV absorption peaks. It is searchable by name, molecular formula or by data values for the above properties.
• Table of the Properties of 200 Linear Macromolecules and Small Molecules

This resource, maintained by Oak Ridge National Laboratory and the University of Tennessee - Knoxville, tabulates selected thermophysical properties for a variety of polymers and some other substances. Properties are primarily related to glass-amorphous transitions, specific heats, etc. The tables are a bit hard to decipher, but there are good explanations.
• SOLV-DB

SOLV-DB is a database of physical, chemical, health and safety, regulatory and environmental fate data on over 100 common organic solvents, provided by the National Center for Manufacturing Sciences. It is searchable by name, formula, CAS Registry Number, property data values and so forth.
• The Good Scents Co. Information Index

This commercial site includes an information index on a wide variety of compounds used in the perfumery industry. The index is divided into categories, such as "essential oils" and "perfumery raw materials (synthetic)". Within each category, compounds are listed alphabetically (using ASCII alphabetization, so compounds whose names begin with "(+)", "(-)" or numbers gravitate to the top of the lists. Compound records give synonyms, descriptions of aroma and perfumery uses, and CAS RN's, and physical property data (density, mp, bp) where available. Unfortunately, the index is not searchable by name or by property, which would enhance its value tremendously, but the site is crossreferenced from Chemfinder (see above), so indirect searching is possible. Still, its information on compound odors is perhaps unique on the Internet.
• IUPAC Chemical Nomenclature

This site, created by G.P. Moss of Queen Mary and Westfield College, contains a number of IUPAC documents on organic and biochemical nomenclature, in many cases including sample structure diagrams.
• IUPAC Nomenclature of Organic Chemistry

Another good nomenclature site, easily browsable and searchable, provided by Advanced Chemistry Development (ACD) Inc.
• Hazardous Chemicals Database

This database, created at the University of Akron, will allow the user to retrieve information for any of over 1300 hazardous chemicals based on a keyword search. Potential keywords include names, formula and registry numbers (CAS, DOT, RTECS and EPA).
• ECDIN - Environmental Chemicals Data Information Network

Temporarily unavailable.
ECDIN is a factual databank, created under the Environmental Research Programme of the Joint Research Centre (JRC) of the Commission of European Communities at the Ispra Establishment. Chemicals are searchable by name, molecular formula or CAS Registry Number. Possible available date include: Identification, Physical-Chemical Properties, Production and Use, Legislation and Rules, Occupational Health and Safety, Toxicity, Concentrations and Fate in the Environment, Detection Methods, Hazards and Emergency. Not all chemicals listed will have data in all fields.
• Thermodex

While this web site does not actually list thermophysical or thermochemical data, it is an extremely useful index to such data available in a host of printed data collections (excluding Beilstein, Landolt-Bornstein, the CRC Handbook and Perry's Handbook), searchable by name of property, class of compound, specific compound or combinations of the above. Thermodex is the creation of the Library of the University of Texas at Austin.

Materials Safety Data Sheets Sites

• MSDS related links from University of Georgia

This web site contains a list of MSDS web sites from a variety of sources.
• MSDS from Vermont SIRI

This site from Vermont Safety Resources on the Internet contains a searchable collection of MSDS from a variety of chemical manufacturers. It also includes a large collection of links to other Web MSDS sites. Vermont SIRI also maintains a good collection of links to other health and safety sites on the Vermont SIRI Web Site.
• MSDS from PTCL in Oxford, U.K.

This Web site contains an alphabetically grouped collection of MSDS from a variety of sources. The collection is maintained by the Physical and Theoretical Chemistry Laboratory at the University of Oxford.
• MSDS-SEARCH

This site is maintained by Envirocare International, Inc. It is a free service bringing together MSDS's from a wide range of chemical manufacturers (over 1000 manufacturers as of 6/99) and public databases. The site includes a glossary of MSDS terminology and links to sites which explain the how and why of MSDS's

University Chemistry Department WWW sites

More information about many programs in the United States and Canada may be found in the ACS Directory of Graduate Research. The 1999 version is available at DGRWeb.

For rankings of Ph.D chemistry programs in the U.S., see the U.S. News and World Report rankings, last updated for chemistry in 1999. Rankings are given for chemistry in general and for the specialties of analytical, bio-organic/biophysical, inorganic, organic, physical and polymer chemistry. Biochemistry and Molecular Biology departments are listed separately.

For other information about programs in the U.S. and Canada, see Peterson's Guide to Graduate and Professional Study or Peterson's Guide to Undergraduate Colleges

University of California at Santa Barbara Department of Chemistry and Biochemistry (DGRWeb listing)

• Interdisciplinary Program in Biochemistry and Molecular Biology

Other California Universities

Other U.S. Universities

Universities Outside the United States

Super Sites

• Analytical Chemistry Springboard from Umeå University

This is an excellent collection of Internet resources dealing specifically with analytical chemistry.
• Australian Chemistry Network -- OzChemNet
• Biochemistry: WWW Virtual Library at Harvard

This biochemistry resource collection is part of the excellent "WWW Virtual Library" alliance of sites.
• Biomolecular & Biosequence Databases (Harvard)

On the same server as the above, this is one of the best lists of the ever-growing libraries of biosequence information available on the Web.
• ChemCenter

This is a pooling of Web resources from the American Chemical Society and Chemical Abstracts Service, including STNEasy, Chemcyclopedia and more. It will eventually feature unique resources as well.
• ChemDex from the University of Sheffield

ChemDex is one of the premier collections of chemistry sites on the Web, extremely comprehensive and well organized. See also ChemWeb below.
• Chemie.de

An excellent recently developed site with a huge collection of links organized by subject class (unfortunately, the links are identified by the page title, which isn't always very descriptive), as well as a nice collection of online tools like a molecular mass calculator, chemical software links, and job and conference listings.
• ChemInfo from Indiana University: CIS-IU

This site, created by Gary Wiggins, chemistry librarian at Indiana University, is excellent, especially for chemical information instruction resources.
• Chemistry : Yahoo

Yahoo's hierarchical collection of chemistry resources is extremely large, if not very selective or well-maintained.
• chemsoc

This site, new for 1998 from the Royal Society of Chemistry in Great Britain, provides a wide range of chemical resources, especially links to academic, educational and scholarly society web sites, and a list of forthcoming conferences and events.
• Chemistry Web from Nanyang Technological University in Singapore

This site is extensive, very well organized and annotated and attractively displayed. Well worth a look, especially for newsgroups and Asian resources.
• ChemWeb.com

This site is an "Internet club for chemists", containing chat rooms, forums, a "shopping mall" with links to suppliers, a "library" with full-text journals from various publishers and databases from MDL Information Systems, Inc., job postings, its own online magazine for chemists (The Alchemist) and other services. ChemWeb now includes ChemDex Plus, a searchable version of the excellent Sheffield ChemDex site. Members must register, but membership is free.
• EInet: Chemistry

Another hierarchically organized collection; like Yahoo, it is large but not well maintained.
• German Chemical Resources: WWW Virtual Library from Karlsruhe

As the name implies, this site focuses on Internet chemical resources based in Germany. Available in both German and English versions.
• The Homepage for Chemists

A large collection of links to Web chemistry resources, well-classified and updated. Also available in a German language version.
• INFOMINE Physical Sciences from UC-Riverside

Not one of the largest physical science sites, but notable for its use of assigned subject headings and keywords for better searching of the resource database.
• Information Retrieval in Chemistry

This interesting new site, maintained at the Institute of Physical Chemistry, NCSR "Demokritos" in Athens, Greece, is notable for its detailed subject classification of the numerous sites to which it links.
• Latinamerican Chemistry Web (English version)

This site is sponsored by the Organization of American States and hosted by CINVESTAV in Mexico. It is especially good for addresses and contacts for Latin American universities and has a host of useful links. It is also available in a Spanish language version.
• Links for Chemists

A superb collection of links maintained by Prof. Michael Barker at the University of Liverpool Department of Chemistry. "Links" is notable for its comprehensiveness, frequent updating and identification of new links.
• NIST Virtual Library Chemistry Subject Guide

This guide to chemistry Web resources from the National Institute of Standards and Technology is not huge, but does contain a few unique links.
• Réseau Chimie

This web site, headquartered in Quebec, Canada, has an extensive collection of well-selected links to Internet resources in chemistry, entirely in French. Each of the individual links has been annotated.
• Rolf Claessen's Chemistry Index

This is a very comprehensive, frequently updated collection of links covering all areas of chemistry.
• SciQuest

SciQuest provides a searchable and browsable collection of links to a vast number of chemical and equipment suppliers. Users may enter as guests, or register as members free of charge.
• Thermodynamic Data and Property Calculation Sites on the Web

An extensive collection of thermodynamic data Web sites from the Thermodynamics Research Lab at the University of Illinois at Chicago.
• Wendy Warr & Co.

This web site for the consulting firm operated by renowned chemical information specialist Wendy Warr includes links to excellent collections of information on current meetings, combinatorial chemistry and chemical structure information on the Web.

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