DDT Tomáš Pokorný. Properties Chemical name 4,4'-(2,2,2-trichloroethane- 1,1-diyl)bis(chlorobenzene) Chemical formula C 14 H 9 Cl 5 Molecular mass 354.49.

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Presentation transcript:

DDT Tomáš Pokorný

Properties Chemical name 4,4'-(2,2,2-trichloroethane- 1,1-diyl)bis(chlorobenzene) Chemical formula C 14 H 9 Cl 5 Molecular mass g/mol Melting point °C Boiling Point 260 °C CAS Number Anofex, Cesarex, Chlorophenothane, Dedelo, p,p'-DDT, Dichlorodiphenyltrichloroethane, Dinocide, Didimac, Digmar, ENT 1506, Genitox, Guesapon, Guesarol, Gexarex, Gyron, Hildit, Ixodex, Kopsol, Neocid, OMS 16, Micro DDT 75, Pentachlorin, Rukseam, R50 and Zerdane. Nerakain Industrial names of insecticides including DDT

History 1873 First synthetized by Othmar Ziedler 1939 Paul Hermann Müller 1948 Nobel Prize 1962 Rachel Carson-DDT Persistent Organic Pollutant 1970 DDT was banned in USA

DDT and malaria Caused by protozoan parasites Transmitted by female of Anopheles mosquito DDT is most affective insecticide against Anopheles mosquito at all DDT is used in 3 rd world countries

Environmental Impact Persistent Organic Pollutant Half life 15 years DDT and its metabolic products accumulate through the food chain DDT is very highly toxic to aquatic life DDT becomes more concentrated in animals higher on the food chain; such as Humans.

Arguments for and against DDT For Since the ban, two million people a year have died unnecessarily from malaria, mostly children. The ban has caused more than fifty million needless deaths. Banning DDT killed more people than Hitler. (Michael Crichton-State of Fear-page 487) At least twice cheaper than other insecticides Against Environmental Impact

THANK YOU FOR ATTENTION