The Aldrich/Sigma/Fluka Catalog offers five types of searching, by Sigma-Aldrich Documents keyword, Data specific, Structure search, Certificate of Analysis by Lot Number, or Safety Data Sheet by Product Number
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ChemExper Chemical Dictionary contains basic properties and spectra, as well as materials safety data sheets. The goal of this project is to create a common and freely accessible database of chemicals over the internet. Everybody can submit chemical information using Expereact Web and retrieve information with a Web browser. ChemExper contains over 40,000 chemical structures, 16,000 MSDS and more than 100,000 products. It is searchable by molecular formula, IUPAC or common names, CAS number, catalogue number, substructure, and physical characteristics. Data is supplied by users, so, exercise caution when using.
The CRC Handbook of Chemistry and Physics is a classic resource containing critically evaluated data in all areas of chemistry and physics. Penn has access to this work in print at several libraries, as well as online. To locate the most recent print editions, please visit https://franklin.library.upenn.edu/catalog/FRANKLIN_99999753503681.