LD50 is used to explain what?

LD50 is used to explain what?

• A. The dose that will kill 25% of test animals
• B. The dose that will kill 50% of a large population of test animal
• C. The dose that will kill 75% of test animals
• D. The dose that is lethal to 100%

Answer: (B)

LD50 is a statistic used in toxicology to express acute toxicity. It denotes the dose that would be expected to kill about half of a defined test population under specified conditions. It’s derived from a dose–response curve, so it’s a population measure rather than a single-individual lethal dose. This standard metric lets scientists and regulators compare how toxic different substances are. The other percentages describe different fatality points, but the conventional measure is the 50% lethality point.

LD50 is a statistic used in toxicology to express acute toxicity. It denotes the dose that would be expected to kill about half of a defined test population under specified conditions. It’s derived from a dose–response curve, so it’s a population measure rather than a single-individual lethal dose. This standard metric lets scientists and regulators compare how toxic different substances are. The other percentages describe different fatality points, but the conventional measure is the 50% lethality point.