Term: time-dependent stoichiometry https://doi.org/10.1351/goldbook.T06378 Definition: A state in which if intermediates are formed in significant amounts during the course of a reaction, the overall stoichiometric equation does not apply throughout. Related Terms: 1) stoichiometric (http://doi.org/10.1351/goldbook.S06021). Source: PAC, 1981, 53, 753. 'Symbolism and Terminology in Chemical Kinetics' on page 754 (https://doi.org/10.1351/pac198153030753) Citation: 'time-dependent stoichiometry' 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.T06378 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.