Question

what are the effects of DDT to the environment
how is DDT degraded in the environment

Answer 1

DDT is slightly to moderately acutely toxic to mammals, including

humans, when ingested. See box on Laboratory Testing. The

acute oral LD50 (rat) is 113 to 800 milligrams per kilogram of body

weight or mg/kg (6). See boxes on LD50 and Toxicity Category.

• One acute toxicity study found that DDT is slightly toxic if

absorbed through the skin. The acute dermal LD50 (rat) is 2,500 to

3,000 mg/kg (6).

• DDT is poorly absorbed through mammalian skin, but it is easily

absorbed through an insect’s exoskeleton (2).

• Laboratory animals exposed to single or multiple doses of DDT

develop hyperexcitability, tremors, incoordination, and convulsions. Death results from respiratory or heart failure (1).

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