Term: HBA solvent https://doi.org/10.1351/goldbook.08175 Definition: Strongly or weakly basic solvent capable of acting as a hydrogen-bond acceptor (HBA) and forming strong intermolecular solute-solvent hydrogen bonds. Note: A solvent that is not capable of acting as a hydrogen-bond acceptor is called a non-HBA solvent. Source: PAC, 2022, 94, 353. 'Glossary of terms used in physical organic chemistry (IUPAC Recommendations 2021)' on page 430 (https://doi.org/10.1515/pac-2018-1010) Citation: 'HBA solvent' 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.08175 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.