Title: component
Long Title: IUPAC Gold Book - component
DOI: 10.1351/goldbook.16268
Status: obsolete

Definition
Constituent whose amount or concentration can be varied independently in a mixture.

Note
The number of components in a given system is the minimum number of independent species necessary to define the composition of all phases of that system. Relations among the constituents, such as charge balance or chemical equilibria, must be taken into account in determining the number of components. The term "component" is also often used in the more general sense defined under constituent.

Related Terms
- constituent: https://goldbook.iupac.org//terms/view/16269
- mixture: https://goldbook.iupac.org//terms/view/16270

Source
- PAC, 2008, 80, 233. 'Glossary of terms related to solubility (IUPAC Recommendations 2008)' on page 241 (https://doi.org/10.1351/pac200880020233)

Other Outputs
- html: https://goldbook.iupac.org/terms/view/16268/html
- json: https://goldbook.iupac.org/terms/view/16268/json
- xml: https://goldbook.iupac.org/terms/view/16268/xml

Citation: Citation: 'component' 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.16268
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.
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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.
Accessed: 2026-07-12T11:27:38+00:00