Free Royal Society of Chemistry database on over 26 million compounds. One can search by various search terms or structure. For each compound one can find literature references, physical and chemical data, interactive spectra, and suppliers.

Free database with UV-Vis, MS, IR, and THz spectra along with GC. In addition one can find other types of thermodynamics and electronic data for these compounds.

Free component of the National Center for Biotechnology Information (NCBI) website where one can obtain information on the biological activities of small molecules. One can search for compounds through search terms or structure. For each compound one can find experimental and calculated physical, chemical, and spectral data; safety information; purchase information; and how this compound is useful in biological applications.

The most complete database of chemical compounds. Ursinus students and faculty have access to this database after they sign up for a web-based account and are on a computer connected to the Ursinus network. See Professor Eric Williamsen for details.

Free database with spectra on over 34,000 organic compounds. Types of spectra include 1H NMR (with interpretations), 13C NMR (with interpretations), EI MS, FT-IR with various types of sampling, Raman, and ESR. Searches can be performed by various means of searching by compound or spectral feature.