EC50 definition

EC50 means the median effective concentration and is a statistically or graphically estimated concentration that is expected to cause one or more specified effects in fifty per cent of a group of organisms under specified conditions.
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EC50 means a statistically or graphically estimated concentration that is expected to cause 1 or more specified effects in 50% of a group of organisms under specified conditions.
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EC50 means the point estimate of the concentration of a toxic substance, wastewater effluent or other aqueous mixture which causes an adverse effect including mortality to 50% of the exposed organisms in a given time period, when compared to an appropriate control.
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Examples of EC50 in a sentence

  • Toxicity to fish: LC50:> 100-1000 mg / l, Exposure time: 96 h Species: FishToxicity to daphnia and other invertebrates that live in water: EC50:> 100 to 1000 mg / l, exposure time: 48 hSpecies: Daphnia magna, the value is estimated from tests on similar products.Toxicity to algae: EC50:> 100 to 1000 mg / l, Exposure time: 72 hSpecies: algae, the value is estimated from tests on similar products.

  • EC50 value is calculated with four parameter logistic equation: Y=Bottom + (Top-Bottom)/(1+10^((LogEC50-X)*HillSlope)) X is the logarithm of concentration.

  • EC50 means a statistically or graphically estimated concentration that is expected to cause 1 or more specified effects in 50% of a group of organisms under specified conditions.

  • EC50 48h - Daphnia magna [mg/l] : No data available.EC50 72h - Algae [mg/l] : No data available.LC50 96 h - Fish [mg/l] : No data available.

  • Therefore LC50 and EC50 values could not be determined [Reference (7)].


More Definitions of EC50

EC50 shall have the meaning set forth in Exhibit A.
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EC50 means the concentration of a test substance which results in a 50% response to the effect measured by the test (e.g. reduction in either growth or growth rate relative to the control) within a defined period of exposure;
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EC50 means, for Acute Toxicity Testing, the statistical estimate of the toxicant concentration that has a specified adverse effect (such as immobilization, change in respiration rate, or loss of equilibrium) on 50 percent of test organisms after a specific time of exposure.
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EC50 means a concentration of a toxic substance which causes an adverse effect including mortality in 50% of the exposed organisms in a given time period.
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EC50 means median effective concentration or the concentration of a substance required to produce a response in 50% of the test organisms;
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EC50 means the point estimate of the concentration of a toxic substance, wastewater effluent or other aqueous mixture
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EC50 means the concentration of effluent that would cause an observable adverse effect (e.g., death, immobilization or serious incapacitation) in 50% of the test organisms.
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