Term: Soret band
https://doi.org/10.1351/goldbook.ST06784

Definition:
A very strong absorption band in the blue region of the optical absorption spectrum of a haem protein.

Related Terms:
1) absorption spectrum (http://doi.org/10.1351/goldbook.A00043).
2) haem (http://doi.org/10.1351/goldbook.H02714).

Source: PAC, 1997, 69, 1251. 'Glossary of terms used in bioinorganic chemistry (IUPAC Recommendations 1997)' on page 1298 (https://doi.org/10.1351/pac199769061251)

Citation: 'Soret band' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. https://doi.org/10.1351/goldbook.ST06784

License: The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International (https://creativecommons.org/licenses/by-sa/4.0/) for individual terms.

Disclaimer: The International Union of Pure and Applied Chemistry (IUPAC) is continuously reviewing and, where needed, updating terms in the Compendium of Chemical Terminology (the IUPAC Gold Book). Users of these terms are encouraged to include the version of a term with its use and to check regularly for updates to term definitions that you are using.