Original: What is an LD50 and LC50 It is being phased out in some jurisdictions in favor of tests such as the Fixed Dose Procedure , LD50 test ban welcomed however the concept , and calculation of the median lethal dose for comparison purposes , is still widely used .
Simplified: The test was created by J.W. Trevan in 1927What is an LD50 and LC50 but is now being phased out in favour of the Fixed Dose ProcedureLD50 test ban welcomed .