Dieldrin

1,2,3,4,10,10 - hexachloro- 6 ,7 -epoxy- 1,4,4 a, 5,6,7,8,8 a- octahydro - 1.4 -endo- 5.8 -exo- dimethanonaphthalin

White to pale yellow solid with naphthalinartigem odor

Fixed

1.75 g · cm -3 ( 20 ° C)

176-177 ° C

Decomposition

In water 0.1-0.2 mg · l-1 (20 ° C)

Risk

0.25 mg · m-3

38.3 mg · kg -1 ( LD50, rat, oral)

Template: Infobox chemical / molecular formula search available

Dieldrin is an insecticide that was used against soil insects and various disease-carrying insects. In addition, it is formed as a degradation product of aldrin in plants and animals.

For fish Dieldrin is highly toxic. Dieldrin adheres very strongly to soil particles. The half-life is in a temperate climate for about five years. Dieldrin is possibly carcinogenic.

Campaign against the fire ant

Under the direction of the U.S. Department of Agriculture ( USDA ) in the late 1950s an attempt was made to eradicate the fire ants in the southern U.S. with the help of dieldrin. The announcement of the action had led to violent protests of 1956 nature conservation organizations. The necessity of such an eradication program was questioned, as was the planned procedure. The plans of the USDA saw before, to distribute on a surface 80000-120000 km2 pellets from a dieldrin - clay mixture. The end of 1957 and 1958 has started with the implementation. It came soon to fish and bird deaths and deaths in livestock and poultry. The hunters complained of a decline in wild game birds. Fisherman on the Gulf of Mexico complained because crabs and shrimp were dying by the sea -flushed dieldrin. In the " treated " areas some snakes, lizard and frog species have been eradicated. The State of Alabama withdrew from the fire ant program in 1959 already authorized appropriations, Florida did so in 1960. The other States affected by the fire ant could no longer be the implementation of the eradication program.

Because of the fight against fire ant has occurred with dieldrin damage in 1958 were first granted funds for research into the environmental impact of pesticides to an appreciable extent.

Analytical detection

The chemical- analytical detection in environmental samples, food and feed can be performed with chromatographic methods.

Ban

With the Stockholm Convention of 22 May 2001 for a worldwide ban on the manufacture, sale and use of twelve persistent organic pollutants ( persistent organic pollutants, POP = persistent organic pollutants) was ratified. Under this " dirty dozen " ( dirty dozen ) is also dieldrin. Since 17 May 2004, the Convention has after ratification by the 50th State on the accession global validity.