The lethal concentration of a substance, reported in ppm, that kills 50% of a population of test organisms, such as mysid shrimp, in a standard, controlled laboratory bioassay test. In offshore drilli [..]

Lethal Concentration (that kills 50% of the test species)

toxicology - lethal concentration that kills 50 percent of the test organisms within the exposure period of the bioassay

The concentration of a material in air that on the basis of laboratory tests (inhalation route of entry) is expected to kill 50% of a group of test animal when administered as a single exposure in a s [..]

the concentration of a chemical that is estimated to be fatal to 50% of the population of a particular organism (usually based on laboratory tests under specified conditions), usually expressed as mil [..]

This abbreviation is used for the exposure concentration of a toxic substance lethal to 50% of a test population. See median lethal concentration.

(50%) Median Lethal Concentration LC-MS