Dermal LD50 refers to which of the following?

The term "dermal LD50" specifically refers to the lethal dose of a substance that, when absorbed through the skin, will cause death in 50% of a test population. This measurement is crucial in toxicology as it helps to assess the potential toxicity of chemicals when they come into contact with the skin. Understanding dermal exposure is especially important in scenarios involving pesticides, as these can often enter the body through skin contact. The LD50 value is a standardized way to quantify the acute toxicity of a substance, which is valuable for safety assessments and regulatory purposes. In contrast to routes of exposure such as inhalation or oral ingestion, dermal exposure highlights the unique risks posed by substances that can be absorbed through the skin, emphasizing the need for protective measures when handling hazardous materials.