SciFinder-n Use the Substances search to find extensive details about a substance - physical, chemical, and biological properties; spectra; federal and international regulations. SciFinder-n requires registration at https://libproxy.library.unt.edu/login?url=https://origin-scifinder.cas.org/registration/index.html?corpKey=3574ABFD-86F3-50AB-5853-7F37D9CB1A36 using a yourname@my.unt.edu or firstname.lastname@unt.edu email address. The email will need to be validated within 96 hours before you can use SciFinder-n.