fingerprint region

https://doi.org/10.1351/goldbook.08604
Region of a spectrum that contains fingerprint bands as well as bands with characteristic group frequencies.
Note:
The fingerprint region is often associated with the region of the mid-infrared or Raman spectrum of wavenumbers between \(\pu{1500 cm-1}\) and \(\pu{400 cm-1}\).
Source:
PAC, 2021, 93, 647. 'Glossary of methods and terms used in analytical spectroscopy (IUPAC Recommendations 2019)' on page 747 (https://doi.org/10.1515/pac-2019-0203)