Address and Contact Information

Chemistry Laboratories, 1973 Wing
231 S. 34th Street, Philadelphia, PA 19104-6323
Accessibility information: See Chemistry Library homepage

For Students, Faculty, and Staff of the University of Pennsylvania

Penn affiliates should present their PennCards to the security guard for inspection before proceeding to the library, and a visible PennCard must be worn above the waist at all times while in the building.

Weekdays after 5pm, weekends, and holidays, access is restricted to holders of department-validated PennCards, which must be worn in a visible location above the waist at all times while in the building.

To validate your PennCard: Cards are validated by advance arrangement with the Chemistry Department. Go to the Chemistry Department Office (first floor), Monday - Friday, 9am - 4pm, bringing your PennCard, and request access to the Chemistry Building for all hours that the library is open. Alternatively, you may e-mail Judith Currano at with your name and ID number, and she will forward the information to the Department. Validation is tied to the life of the PennCard, so, if you get a new card, you must have it revalidated.

For All Other Visitors

The Chemistry Library is open by appointment only to scholars from other institutions and members of the general public on weekdays, from 9:00 am - 4:30 pm.  Anyone wishing to make an appointment should do so by contacting the Chemistry Library at 215-898-2177 or  Upon arrival, they must display a valid photo ID card and sign in with the security guard, who will impart further instructions.

Research Services

Ask a question

Judith Currano, the reference librarian for the Chemistry Library, is available between 9:00AM and 4:30PM to help with your reference questions.  Finding chemical information can be challenging, so, we encourage you to contact the librarian whenever you think it is taking too long to find the information you seek!

Walk-ins are encouraged, but, if you are making a special trip to the library, you may want to phone ahead, especially during the fall and spring semesters. You can contact Judith Currano by phone at 215-746-5886, or by email at

You can also use the Ask a Question form to make an inquiry. This service is primarily for students, faculty, and staff. We will try to respond as soon as possible.

Request course-related Instruction or schedule a consultation

Penn faculty may request course-related library instruction sessions customized to meet the needs of their students. If you are interested in having library instruction for your class, please either contact Judith Currano directly at 215-746-5886 or or use the Request a Consultation or Instructional Session form.

To schedule an appointment with a reference librarian to discuss your research needs, use the Request a Consultation or Instructional Session form.

STN Substructure Searching

Can't find a preparation for the compound you want? Interested in finding a compound with a similar structure to your target molecule? Substructure searching on the STN database is available to current Penn affiliates only after 5PM on most weekdays. Please make an appointment with Judith Currano at least two days in advance by calling 215-746-5886 or by e-mailing