15375 IUPAC Gold Book - mass percent 10.1351/goldbook.15375 15375 current 1 Deprecated term that includes both a quantity and a unit. Replace by mass fraction expressed as percent. Deprecated: the solubility of \(\ce{B}\) is \(\pu{2.5 mass \%}\). Recommended: the solubility of \(\ce{B}\) is \(w_{\ce{B}} = 0.025\), or \(w_{\ce{B}} = \pu{2.5\%}\), or (especially in table headings and labels on axes of plots) \(100 w_{\ce{B}}\), with entry \(\pu{2.5}\) in table or on axis. PAC, 2008, 80, 233. 'Glossary of terms related to solubility (IUPAC Recommendations 2008)' on page 253 (https://doi.org/10.1351/pac200880020233) https://goldbook.iupac.org/terms/view/15375/html https://goldbook.iupac.org/terms/view/15375/json https://goldbook.iupac.org/terms/view/15375/plain Citation: 'mass percent' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. 10.1351/goldbook.15375 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. If you are interested in licensing the Gold Book for commercial use, please contact the IUPAC Executive Director at executivedirector@iupac.org . 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. 2026-07-24T04:22:15+00:00