12788 IUPAC Gold Book - melting temperature 10.1351/goldbook.12788 12788 current synonym: melting point 1 Temperature at which the last trace of crystallinity disappears upon heating. This temperature usually refers to the highest temperature of the melting range, i.e., when the last and therefore the most perfectly ordered crystals or the largest crystals melt. An experimentally determined melting temperature is not necessarily identical with the equilibrium melting temperature. See equilibrium melting temperature and Hoffman–Weeks plot. Experimentally determined values of the melting temperature may depend on the method and the experimental conditions, for example, sample mass, heating rate, etc. If \(T_{\rm{m}}\) is determined using DSC or DTA, then the characteristic temperature (Figure 2) used should be stated. Hoffman–Weeks plot https://goldbook.iupac.org//terms/view/12775 characteristic temperatures https://goldbook.iupac.org//terms/view/12746 equilibrium melting temperature https://goldbook.iupac.org//terms/view/12766 PAC, 2013, 85, 1017. 'Glossary of terms relating to thermal and thermomechanical properties of polymers (IUPAC Recommendations 2013)' on page 1034 (https://doi.org/10.1351/PAC-REC-12-03-02) https://goldbook.iupac.org/terms/view/12788/html https://goldbook.iupac.org/terms/view/12788/json https://goldbook.iupac.org/terms/view/12788/plain Citation: 'melting temperature' 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.12788 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. 2026-07-15T03:09:37+00:00