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Chemdex, Directory of Chemistry on the WWW
http://www.chemdex.org
By clicking the Chemistry link on the left-hand side of the screen, users will find many quality resources to authoritative sites.
Subjects:   Chemistry  

American Chemical Society
http://portal.acs.org/portal/acs/corg/content
The American Chemical Society website contains chemistry resources and information for researchers or those with a general interest.
Subjects:   Chemistry  

ChemWeb
http://www.chemweb.com
ChemWeb.com is a unique resource which combines a huge range of information for those in research chemistry, the chemicals industries and related disciplines. You can access over 230 full-text journals and 25 databases from a variety of publishers.
Subjects:   Chemistry  

Hazardous Chemical Database
http://ull.chemistry.uakron.edu/erd
Searchable database of over 1300 hazardous chemicals. Includes names, synonyms, formula, physical data, guides and registry numbers.
Subjects:   Chemistry  

WebElements
http://www.webelements.com/
This site provides an interactive periodic table with comprehensive information on each existing element.
Subjects:   Chemistry  

General Chemistry Online
http://antoine.frostburg.edu/chem/senese/101
Provides general chemistry information from glossaries, a compound library, and tutorials. Many links, organized by topic, are provided to other chemistry-related websites.
Subjects:   Chemistry