Chemistry & Biochemistry

SpectroscopyNOW includes information on a wide range of spectroscopy topics, including NMR, IR, UV and mass spec. Access to some features requires free registration.

Produced by the National Institute of Standards and Technology (NIST). this database provides access and search capability for NIST critically evaluated data on atomic energy levels, wavelengths, and transition probabilities that are reasonably up-to-date.

Includes IR, mass spec, and UV spectra for thousands of compounds.