What is DDT that is used in pesticide?

Answer 1

DDT is an artificial insecticide prepared by the reaction of chloral with chlorobenzene in the presence of sulfuric acid. It was first made in 1874, but its insecticidal action was discovered in 1939 by Paul Hermann Muller, a Swiss chemist.

Answer 2

Commercial DDT is a mixture of several closely–related compounds. The major component (77%) is the

p,

p'

isomer. The

o,

p'isomer (pictured to the right) is also present in significant amounts (15%).

Dichlorodiphenyldichloroethylene(DDE) and

dichlorodiphenyldichloroethane(DDD) make up the balance. DDE and DDD are also the major

metabolitesand breakdown products in the environment.

The term "

total DDT

" is often used to refer to the sum of all DDT related compounds (

p,p'-DDT,

o,p'-DDT, DDE, and DDD) in a sample.

Answer 3

DDT (dichlorodiphenyltrichloroethane) is an emblematic insecticide, due to its controversial history. Off patent, it is relatively easy for chemists to synthesize. DDT was first synthesized in 1874, by Swiss chemist Paul Hermann Müller, who did not discover its insecticidal properties until 1939.

DDT is an organic halogen compound, with chemical formula C14H9Cl5. Crude, it looks like a waxy solid, but in its pure form consists of colorless crystals. It is virtually insoluble in water, but readily dissolves in fat. The original method of DDT synthesis involves reacting one mol of chloral with two mols of chlorobenzene in the presence of sulfuric acid. Although different condensing agents can be used, practically all other processes are modifications of the original method.

To synthesize DDT, chloral is dissolved in chlorobenzene and the solution cooled under constant stirring. As portions of chlorosulfonic acid are then added at timed intervals, a solid begins to separate. Within a few minutes, the reaction mixture becomes pasty.

During the extraction phase, the reaction mixture is mixed with chipped ice, the crude DDT filtered off with suction, and occluded acid removed. The product is then collected on a Biichner funnel, and washed with cold methanol or re-crystallized once from a mixture of methanol and diethyl ether.

DDT kills insects by opening sodium ion channels in their neurons (nerve cells), leading to spasms and eventual death. Via the oral route, large amounts of DDT can be toxic to some mammals and disrupt endocrine function in humans.

DDT use was banned in the U.S. in 1972 because of its effects on the environment.

Answer 4

How does DDT work? • DDT affects the nervous system by interfering with normal nerve impulses .

Answer 5

Yes, DDT is a product of the chemical industry.

Answer 6

DDT is dichlordiphenyltrichlorethane, C14H9Cl5.

Answer 7

the ddt store

Answer 8

The chemical formula of DDT is C14H9Cl5.