no-effect level

initialism: NEL
https://doi.org/10.1351/goldbook.15922
Maximum dose (of a substance) that produces no detectable changes under defined conditions of exposure.
Note: This term tends to be substituted by no-observed-adverse-effect level (NOAEL) or no-observed-effect level (NOEL).
Source:
PAC, 2007, 79, 1153. (Glossary of terms used in toxicology, 2nd edition (IUPAC Recommendations 2007)) on page 1271 [Terms] [Paper]
Citation: 'no-effect level' 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.15922 RIS BibTex EndNote
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