"El hombre razonable
se adapta al mundo y el no razonable intenta adaptar el mundo a su gusto.
Por eso el progreso depende de los hombres no razonables".
George B. Shaw
Enlaces a páginas con información relevante de Química.
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. Note: full access is
available only to subscribers. Users with a ucsb.edu Internet
account automatically get in on the Davidson Library subscription.
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
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 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.
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
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
(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
(6) Thermophysical property data for 16 fluids
Data on specific compounds may be located by name, formula or CAS Registry
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 mission of CODATA is to strengthen international science for the
benefit of society by promoting improved scientific and technical data
management and use.
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.
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.
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
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.
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 contain basic
safety information on the storage, handling and use of chemicals. Manufacturers
are required to provide them on request for any chemical products they sell.
There are a number of Internet sites which provide electronic collections of
MSDS's for quick reference.
MSDS related links from University of Georgia
This web site contains a list of MSDS web sites from a variety of sources.
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.
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
The following are links to the web pages of
academic chemistry and/or biochemistry departments in California, the rest of
the United States and the world. Nearly all have contact information, lists of
faculty and courses and other useful information.
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
For rankings of Ph.D chemistry programs in
the U.S., see
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
Biochemistry and Molecular Biology departments are listed separately.
These are major collections of World Wide Web
information in chemistry. Some of the sources they link to may duplicate each
other or the Infosurf Chemistry Page, but you will also find unique resources.
If you spot any resources that you think should receive their own listings here,
Chuck Huber (email@example.com)
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.
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.
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.
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
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.
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.
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
Another hierarchically organized collection; like Yahoo, it is large but not
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
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
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.
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 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 &
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.
Prizes in Chemistry
This site lists the names of the Nobel Prize winners in chemistry and the
achievements for which they won the prize, from 1901 to 1995. In some
the list gives links to home pages devoted to the winner.
Winners of the
Prize in Chemistry
This is an even better site, with a little biographical information on the
winners, and more Web links, including an Alta Vista search on each
Administered by the American Chemical Society
This site lists the awards administered by the ACS, with descriptions of
each, contact persons, and information on the nominating procedure.
These are the Web sites for the major chemical societies. Most have
information on their publications, conferences, services, membership and
so on. If you don't see the society you're looking for below, try the Royal Society of Chemistry's chemsoc Societies Directory. They also have a Societies Index, which allows the user to search multiple society Web sites at once.