Registration (Required). SciFinder Web requires an individual SciFinder username and password using an @wisc.edu email address. SciFinder is used to access information in selected Chemical Abstracts Service (CAS) databases: CAPlus, CARegistry, CAREACTS, CHEMCATS, and CHEMLISTS, plus Medline (1946-present). It permits searching in a variety of ways: author name, research topic, substance identifier (CAS Registry Number, chemical name), chemical structure/substructure, or chemical reaction. See Databases and Full-Text Links for database contents.