Skip to main content
An official website of the United States government.

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

Concept information

Preferred term

lethal concentration 50

Type

  • Topic

Definition

  • Information 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".

Synonyms

  • LC 50
  • LC-50
  • LC50
  • lethal concentration-50
  • median lethal concentration
  • population critical concentration 50

In other languages

  • Spanish

  • CL 50 (concentración letal 50)
  • concentración letal media
  • concentración letal mediana

URI

https://lod.nal.usda.gov/nalt/68545

Download this concept:

RDF/XML TURTLE JSON-LD Created 10/23/06, last modified 2/15/18