Data Sources and Directories
The Aldrich/Sigma/Fluka Combined Catalog
The Catalog may be searched compound name, CAS number, molecular weight, molecular formula, or density.
Basic Physical Property Sources
InfoSurf guide at USCB
The Clearinghouse for Chemical Information Instructional Materials (CCIIM) collects and distributes items that were developed to instruct you in the use of chemical information sources.
ChemExper Chemical Directory
Free information, search by molecular formula, name, CAS number, catalog number, substructure, or physical properties. It contains more than 70,000 compounds.
This WebServer is a chemical database, it includes physical property data and 2D chemical structures for the several thousand most-common compounds.
ChemInfo - Directory of chemical information resources
Chemical Data Sources
University of California, Santa Barbara Library web page resources for chemistry and biochemistry.
An Online, Interactive Periodic Table
Molecular Structure Calculation
The Molecular Structure Input Form will allow you to calculate molecular properties such as bond lengths, angles, atomic charges, the dipole moment, bond orders, and molecular orbital energies.
General Chemistry Cross-Index
Chemistry Hypermedia Project documents that are typically presented in an undergraduate general chemistry course.
A gateway to authoritative selected science information provided by U.S. Government agencies, including research and development results.
Selected Internet Resources for Chemistry
Gary Wiggins, Indiana University, links to factual sources for answers to your question.