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

• Toxicity Product/ingredient nameResultSpeciesExposuretitanium dioxideAcute LC50 >100 mg/l Fresh waterDaphnia - Daphnia magna48 hours Persistence and degradabilityNot available.

• InhalationType of value: LC50 Species: rat Exposure time: 4 h not determined DermalType of value: LD50 Species: ratnot determined Assessment other acute effectsBased on available data, the classification criteria are not met.

• Experimental/calculated data:LD50 rat (oral): 2,102 mg/kg (OECD Guideline 401) LC50 rat (by inhalation): > 4.8 mg/l 4 h Highest concentration technically achievable.

• Endpoint: LC50 - Species: Fish > 0.0022 mg/l (Oncorhynchus mykiss, GLP, ECHA dossier).

• Ecological information Toxicity Toxicity to fish: LC50; Species: Pimephales promelas (Fathead minnow); Conditions: feshwater, semi-static, 25.5 deg C, pH 7.70 + or -0.2, oxygen concentration 6.7 mg/mL; Concentration: 0.28 mg/L for 96 hr /98% pure 1R(+)-isover.

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 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 concentration of effluent which causes mortality to 50% of the test organisms. Therefore, a 100% limit means that a sample of 100% effluent (no dilution) shall cause no more than a 50% mortality rate.

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).