Dichlorodiphenyldichloroethylene

  • P, p'- Dichlordiphenyldichlorethen
  • DDE
  • P, p'- DDE
  • 2,2-bis ( 4-chlorophenyl) -1,1- dichloroethene
  • 1-chloro- 4-[ 2,2- dichloro- 1-(4 -chlorophenyl) ethenyl] benzene (IUPAC)

Fixed

88-89 ° C

Poorly soluble in water: 0.01 to 0.12 mg · l-1 (20 ° C)

Attention

  • 700 mg · kg -1 ( LD50, mouse, oral)
  • 880 mg · kg -1 ( LD50, rat, oral)

Template: Infobox chemical / molecular formula search available

Dichlordiphenyldichlorethen (DDE) is a chemical compound. It, together with Dichlordiphenyldichlorethan (DDD ) is a metabolite of the insecticide DDT, from which it is formed by elimination of hydrogen chloride.

Environmental relevance

In the 1950s and 1960s, the populations of eagles declined worldwide. The problem encountered by the use of the insecticide worldwide frequently used from the 1940s DDT in the environment enriched DDE on through the food chain. When eagles and other birds of prey, this resulted in thin eggshells, making the eggs often broke during incubation. The restrictions on the use of DDT to the extensive restrictions imposed by the Stockholm Convention in 2004 led to a recovery of stocks from the early 1970s.

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