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 Breadcrumbs

Preferred Term:

median effective concentration

The concentration of a chemical or drug that results in 50% of its maximal effect.
Concept Schemes:
Broader Concept:
Entry Terms:
  • EC50 (effective concentration 50)
  • 50% effective concentration
  • half-maximal effective concentration
  • effective concentration 50
Download this Concept:
RDF/XMLCreated 2016-09-19, last modified 2016-11-14