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NAL Agricultural Thesaurus
U.S. Department of Agriculture

Concept Breadcrumbs

Fields of Study > animal and human health > medical sciences > toxicology > toxicity testing > lethal concentration 50
Animals, Livestock, One Health > animal and human health > medical sciences > toxicology > toxicity testing > lethal concentration 50
Research, Technology, Methods > methodology > testing > toxicity testing > lethal concentration 50
Research, Technology, Methods > methodology > laboratory techniques > animal tests > lethal concentration 50
Preferred Term:

lethal concentration 50

Definition:
Concentration of a material in the air that kills 50% of the test animals when administered as a single exposure in a specific time period (usually 1 hour); a common measure of acute toxicity of vapors, dusts, mists and gases. Note that lethal concentration values are used when the route of administration is by inhalation. LC values are often expressed as parts of material per million parts of air (ppm). Compare "lethal dose 50".
Concept Schemes:
NALT Full
NALT Core
Broader Concept:
toxicity testing, animal tests
Related Concepts:
Entry Terms:
  • median lethal concentration
  • LC 50
  • LC-50
  • population critical concentration 50
  • lethal concentration-50
  • LC50
URI:
https://lod.nal.usda.gov/nalt/68545
Download this Concept:
RDF/XMLCreated 2006-10-23, last modified 2018-02-15
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