Helpful tips for property data searches, from Linda Shackle, Science Librarian at Arizona State University
CRC Handbook of Chemistry and Physics The authoritative reference source on chemical and physical data.
The Merck index : an encyclopedia of chemicals, drugs, and biologicals A one-volume encyclopedia of chemicals, drugs and biologicals.
Lange's handbook of chemistry Properties of approximately 4,400 organic and 1,400 inorganic compounds.
TOXNET: toxicology data network A database of hazardous substances, with comprehensive, peer-reviewed toxicology data for about 5,000 chemicals. Definitive reference for chemical and process engineers.
Knovel Critical Tables Interactive charts and tables that allow you to export property data.