Finding Chemical & Physical Property Data
Finding Background Information for Physical Chemistry & Chemical Physics
Encyclopedias and handbooks are a good way to get a broad overview and context for a subject and helpful for deciphering research articles. References at the ends of articles lead you to further relevant information.
Other helpful sources of background information are review articles and trade magazines. You can find those using databases like SciFinder-n, Scopus, and Web of Science and limiting by Document Type or Treatment Type.