Title: exposure
Long Title: IUPAC Gold Book - exposure
DOI: 10.1351/goldbook.ET06811
Status: current

Definition
Concentration, amount or intensity of a particular physical or chemical agent or environmental agent that reaches the target population, organism, organ, tissue, or cell, usually expressed in numerical terms of concentration, duration, and frequency (for chemical agents and micro-organisms) or intensity (for physical agents).Note: This differs from the definition of exposure in radiation chemistry.Process by which a substance becomes available for absorption by the target population, organism, organ, tissue or cell, by any route.

Related Terms
- exposure in radiation chemistry: https://goldbook.iupac.org//terms/view/ET02276
- micro: https://goldbook.iupac.org//terms/view/M03894

Source
- PAC, 2004, 76, 1033. 'Glossary of terms used in toxicokinetics (IUPAC Recommendations 2003)' on page 1051 (https://doi.org/10.1351/pac200476051033)

Other Outputs
- html: https://goldbook.iupac.org/terms/view/ET06811/html
- json: https://goldbook.iupac.org/terms/view/ET06811/json
- xml: https://goldbook.iupac.org/terms/view/ET06811/xml

Citation: Citation: 'exposure' 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.ET06811
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.
Collection: If you are interested in licensing the Gold Book for commercial use, please contact the IUPAC Executive Director at executivedirector@iupac.org .
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: 2026-01-13T01:12:12+00:00