This site offers a basic resource for people like me. Find a searchable common compound library that provides synonyms as well as Chime structures and spectra. A cool feature of this library is an automatic link to ChemFinder when your search fails. HighWire Press, founded by Stanford University, assists in the publication of 210 online medical or science journals. It offers a database for searching the content of these journals.
Some journals require registration or paid subscription for full-text access.
The Pesticide Action Network North America offers this database of toxicity, ecotoxicity, and regulatory information for about 5,100 pesticides. Search by chemical name, CAS number, EPA PC Code or CA DPR Chem Code. The database returns a chart containing all matches. The chart includes all the above information about matching chemicals. Site documentation promises soon to improve the database to enable searching by product name, registration status, or manufacturer, and to add pesticide use information for California by crop, chemical, and geographic region.