SciFinder Connect to SciFinder

To use SciFinder, you must register from an on-campus computer and provide your University of Delaware e-mail to complete registration.

Once your registration is confirmed and activated, click on the “Connect” button above to search SciFinder from anywhere.

Also known as: SciFinder on the Web
Access: Internet-delivered database. You must be a current University of Delaware student, faculty, or staff in order to register with CAS. There are three ways to connect:
  1. from a public computer in the University of Delaware Library
  2. from a University of Delaware campus connection in your dorm, lab, or office
  3. from an off-campus connection (University of Delaware ID required)
If you wish to bookmark SciFinder, please use the following URL:

The Web version of SciFinder enables access to the databases and many of the analytical tools provided by CAS (Chemical Abstracts Service) via a Web browser. The University of Delaware Library migrated from the SciFinder Scholar client software to SciFinder on the Web in August 2009.

SciFinder on the Web searches using text terms and has tools to refine and analyze search results. It is supported for both Mac and Windows users. Mac users should consult the CAS FAQ.

The databases include: CAplus (Chemical Abstracts), REGISTRY, CASREACT (chemical reactions database), CHEMCATS (commercially available chemical information), CHEMLIST (regulated chemical information), and MEDLINE (biomedical literature worldwide).


CAplus: 1907 to date, plus over 44,000 records for journal articles dated before 1907

MEDLINE: 1950 to date

REGISTRY: 1957 to date, plus many substances dating back to 1907

CASREACT: 1840 to date

Updated: CAplus (Chemical Abstracts) is updated daily; the REGISTRY is updated daily; CASREACT is updated weekly.
Alerts: You can create Keep Me Posted (KMP) profiles.
Permitted Uses: The license agreement is displayed after you log on to SciFinder. You must agree to it before searching.
Logoff/Timeout: after 15 minutes of inactivity
Help: Demo of SciFinder
SciFinder General FAQ
SciFinder How-to Guide (Web Version)
SciFinder FAQ.
For further assistance, Ask the Library.
Software Requirements: Accessing the Web Version of SciFinder
System Availability: SciFinder System Availability
Related Resources: Databases for Chemistry
Users: unlimited concurrent users
Producer: CAS, a division of the American Chemical Society

This page is maintained by Erin Daix, Collection Development Department.

Last modified: 03/23/15