Chemistry
- Chemical Abstracts Service
- (American Chemical Society) -- information about their many products and services, but also an online searchable journal title database called CAS DDS Title Search, and reasonably priced document delivery service
- Chemistry Virtual Library
- Links for Chemists is an index of chemistry resources on the web. This site is the copyright of The University of Liverpool, Department of Chemistry.
- Chemistry Web Book
- National Institute of Standards and Technology) -- (works best on browsers that support tables) thermodynamic data for over 5000 chemical compounds and ion-energetics data for over 10,000; can be searched by name, formula, or CAS registry number.
- Chemistry.org
- News, new patents, today's chemist at work section for educators and students, stuctural formula graphics etc.
- eMolecules
- search named chemicals, commercial compounds, structure search
- The National Toxicology Program
- free online NTP health and safety data; 2000 chemicals (Note: file is 430K!); can be searched by chemical name, synonym or CAS registry number; source for MSDS.
- Tox Town and Toxnet
- alphabetic indexes of chemicals and disasters, teacher resources
- Web Elements
- Online periodical table of elements: gives essential, description and isolation information.