8.12 Lethal Dose 50% (LD₅₀)

Define lethal dose 50% (LD₅₀).

• Lethal dose 50% (LD₅₀) is the dose of a chemical that is lethal to 50% of the population of a particular species.
• Enduring understanding EIN-3: Pollutants can have both direct and indirect impacts on the health of organisms, including humans.