Define dermal LD50.

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Multiple Choice

Define dermal LD50.

Dermal LD50 refers to the amount of a substance, expressed as milligrams of substance per kilogram of body weight, that will kill 50% of a test animal when the substance is applied to the skin. The key idea is that the route of exposure matters: this LD50 value specifically measures toxicity through dermal (skin) contact, as opposed to ingestion (oral), inhalation, or exposure to mucous membranes. The mg/kg per body weight unit standardizes the dose across different animal sizes, allowing comparison of toxicity on a consistent basis. Therefore, the definition that matches dermal exposure is the amount that kills 50% of test animals when applied to skin.

Dermal LD50 refers to the amount of a substance, expressed as milligrams of substance per kilogram of body weight, that will kill 50% of a test animal when the substance is applied to the skin. The key idea is that the route of exposure matters: this LD50 value specifically measures toxicity through dermal (skin) contact, as opposed to ingestion (oral), inhalation, or exposure to mucous membranes. The mg/kg per body weight unit standardizes the dose across different animal sizes, allowing comparison of toxicity on a consistent basis. Therefore, the definition that matches dermal exposure is the amount that kills 50% of test animals when applied to skin.

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