Lethal concentration definition

Lethal concentration or "LC50" means the toxicant concentration killing 50 percent of the exposed organisms in a specific time of observation.
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Lethal concentration means the median lethal concentration level, at which 50 percent of appropriate test animals die when exposed by inhalation for a scientifically appropriate specified time period.
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Examples of Lethal concentration in a sentence

  • ACGIH: American Conference of Governmental Industrial Hygienists EINECS: European Inventory of Existing Commercial Chemical Substances ELINCS: European List of Notified Chemical Substances NFPA: National Fire Protection Association (USA) HMIS: Hazardous Materials Identification System (USA) LC50: Lethal concentration, 50 percent vPvB: Very Persistent and Very Bioaccumulative Flam.

Related to Lethal concentration

  • Alcohol concentration means the number of grams of alcohol per 100 milliliters of blood or per 210 liters of breath.

  • Net concentration means the difference between the concentration of a given substance in a sample taken of the discharge and the concentration of the same substances in a sample taken at the intake which supplies water to the given process. For the purpose of this definition, samples that are taken to determine the net concentration shall always be 24-hour composite samples made up of at least six increments taken at regular intervals throughout the plant day.

  • Excess Concentration means the sum of the following amounts, without duplication:

  • Concentration means the weight of any given material present in a unit volume of liquid. Unless otherwise indicated in this permit, concentration values shall be expressed in milligrams per liter (mg/l).

  • Baseline concentration means that ambient concentration level that exists in the baseline area at the time of the applicable minor source baseline date. A baseline concentration is determined for each pollutant for which a minor source baseline date is established and shall include the following: