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acute dermal toxicity test

For the OECD TG 402, Acute Dermal Toxicity, a test substance is applied to no less than 10% of the area of the skin of rats, rabbits, or guinea pigs, followed by 14 days of observation. Death of the animals is used to determine an LD50 value.

This method provides information on health hazard likely to arise from a short-term exposure to solid or liquid test substance by the dermal route.

This Test Guideline is intended primarily for use with rodents (rat, rabbit or guinea pig may be used). For each dose at least 5 animals (of the same sex) are used. The test substance is applied to the skin (not less than 10 per cent of the body surface area) in graduated doses to several groups of experimental animals, one dose being used per group. At least three dose levels should be used, appropriately spaced to produce a dose-response curve. A limit test of at least 2000 mg/kg could be made. The observation period should be at least 14 days. During the first day the animals should be observed frequently and then the observations should be made daily. Necropsy of all animals should be carried out and all gross pathological changes should be recorded. A study of acute toxicity by the dermal route and determination of a dermal LD provides an estimate of the relative toxicity of a substance by the dermal route of exposure and they may serve as a basis for classification and labeling. It is an initial step in establishing a dosage regimen in subchronic and other studies and may provide information on dermal adsorption and the mode of toxic action of a substance by this route.



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  • acute dermal toxicity