Title: no-response level
Long Title: IUPAC Gold Book - no-response level
DOI: 10.1351/goldbook.14886
Status: current

Definition
Maximum dose of a substance at which no specified response is observed in a defined population and under defined conditions of exposure.

Related Term
- population: https://goldbook.iupac.org//terms/view/14932

Source
- PAC, 2009, 81, 829. 'Glossary of terms used in ecotoxicology (IUPAC Recommendations 2009)' on page 921 (https://doi.org/10.1351/PAC-REC-08-07-09)

Other Outputs
- html: https://goldbook.iupac.org/terms/view/14886/html
- json: https://goldbook.iupac.org/terms/view/14886/json
- xml: https://goldbook.iupac.org/terms/view/14886/xml

Citation: Citation: 'no-response level' 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.14886
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: 2026-04-21T00:28:03+00:00