lowest-observed-effect concentration

initialism: LOEC
https://doi.org/10.1351/goldbook.14820
Lowest concentration of a material used in an aquatic toxicity test that has a statistically significant adverse effect on the exposed population of test organisms compared with controls.
Note: When derived from a life cycle or partial life cycle test, it is numerically the same as the upper limit of the maximum acceptable toxicant concentration (MATC). Also called lowest-observed-adverse-effect level (LOAEL).
Source:
PAC, 2009, 81, 829. (Glossary of terms used in ecotoxicology (IUPAC Recommendations 2009)) on page 908 [Terms] [Paper]
Citation: 'lowest-observed-effect concentration' 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.14820 RIS BibTex EndNote
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