15240 IUPAC Gold Book - syrup 10.1351/goldbook.15240 15240 current 1 Liquid preparation of high sugar concentration with or without medicinal and additional flavoring substances. Syrup is a highly concentrated solution of sugar. Other polyols, such as glycerol or sorbitol, may be present to retard crystallization of sucrose or to increase the solubility of added ingredients. When the syrup contains a medicinal substance, it is termed "medicated syrup"; and the syrup is diluted since USP syrup is close to a saturated solution. Although syrup tends (due to its very high [approximately \(\pu{85\%}\)] sucrose content) to resist mold or bacterial contamination, syrup may contain antimicrobial agents to prevent bacterial and mold growth. It is often required to add a cosolvent or water to the medicated syrup in order to dissolve the drug. PAC, 2009, 81, 971. 'Glossary of terms related to pharmaceutics (IUPAC Recommendations 2009)' on page 997 (https://doi.org/10.1351/PAC-REC-04-10-14) https://goldbook.iupac.org/terms/view/15240/html https://goldbook.iupac.org/terms/view/15240/json https://goldbook.iupac.org/terms/view/15240/plain Citation: 'syrup' 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.15240 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. 2026-06-27T15:49:02+00:00