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- Dieldrin is a man-made
chemical used as an insecticide.
- Aldrin and dieldrin
were discovered by Julius Hyman. Hyman worked for Velsicol Corporation,
headquartered in Memphis, Tennessee, and helped discover chlordane.
- Aldrin, dieldrin, and
endrin are cyclodienes made by a chemical process known as the Diels-Alder
reaction, hence their names.
- Dieldrin is an
organochlorine insecticide that is structurally very similar to Aldrin.
- Dieldrin occurs as
white crystals or tan-coloured flakes, odourless or with mild chemical
odour.
- The trade names used
for dieldrin include Alvit, Dieldrix, Octalox, Quintox, and Red Shield.
- Pure aldrin and
dieldrin are white powders with a mild chemical odor. The less pure
commercial powders have a tan color.
- Dieldrin, a
stereoisomer of endrin, was typically produced by the epoxidation of
aldrin with peracetic or perbenzoic acid.
- Dieldrin was
manufactured by the epoxidation of aldrin. The epoxidation of aldrin was
obtained by reacting it either with a peracid or with hydrogen peroxide
and a tungstic oxide catalyst .
- Water treatment
technologies such as granular activated carbon and reverse osmosis can
reduce levels of aldrin and dieldrin in drinking water supplies.
- Aldrin and its epoxide
dieldrin are largely used in countries with hot climates, both as
agricultural insecticides and for the control of tsetse fly, the vector
of human and animal trypanosomiasis, and other insects which are sources
of various human and animal diseases.
- Dieldrin, the second
most commonly used agricultural pesticide in the U.S. in the 1960s
(after DDT) and banned in the U.S. in 1987, is an acutely toxic
carcinogenic and endocrine-disrupting compound.
- Dieldrin can evaporate
slowly from surface water or soil. In the air, dieldrin changes to
photodieldrin within a few days.
- While estimates of
production of aldrin and dieldrin vary, it is probable that their
combined production rose to a peak of about 20 million pounds a year in
the mid-1960s and then declined.
- Aldrin/ dieldrin ranked
second—after DDT— among agricultural chemicals used in the United States
in the 1960s.
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