LC50 definition

LC50 means the concentration of toxicant (e.g., effluent) which is lethal to 50 percent of the test organisms exposed in the time period prescribed by the test.

LC50 means the median lethal concentration and is a statistically or graphically estimated concentration that is expected to be lethal to fifty per cent of a group of organisms under specified conditions.

LC50 means a statistically or graphically estimated concentration that is expected to be lethal to 50% of a group of organisms under specified conditions.

Examples of LC50 in a sentence

• Data collected during the test are used to develop concentra- tion—response curves and LC50 values for the test substance.

• The modeled concentrations of the dredged material are compared with the LPC, as determined by 0.01 of the 48- or 96-hour LC50, to determine compliance.

• The LC50 pH, the hydrogen ion concentration at which 50% of boreal toad embryos die, was 4.4–4.5 in one laboratory study (Xxxx and Xxxxxxxx 1992).

• U.S. 8 EPA typically uses 96-hour LC50 values in fish to assess the potential for acute risks in fish.

• This is supported by Figure 2, which shows that chronic data are mostly reported at NOEC, LOEC, and EC10 levels, together accounting for 75% of all reported chronic data in REACH, whereas acute data are mostly available at EC50 and LC50 levels, together accounting for 61% of all reported acute data in REACH.

More Definitions of LC50

LC50 means a concentration of a substance (usually in air) that is estimated to produce death in 50 per cent of a population of experimental animals on inhalation for a short period of time.

LC50 means the concentration of a substance, mixture of substances, or discharge which causes mortality to fifty percent of the test organisms in an acute toxicity test.

LC50 means the concentration of a toxicant at which lethality occurs to 50 percent of the test organisms during a specified exposure time period.

LC50 means the median lethal con- centration, i.e., that concentration of a chemical in air or water killing 50 per- cent of the test batch of organisms within a particular period of exposure (which shall be stated).

LC50 means the point estimate of the concentration of a toxic substance, wastewater effluent or other aqueous mixture which is lethal to 50% of the exposed organisms in a given time period, when compared to an appropriate control.

LC50 means that concentration of a toxic substance that is lethal or immobilizing to 50 percent

LC50 means the statistical estimate of the concentration of a substance which kills 50 percent of the bioassay test organisms under test conditions specified or approved by the Department.