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1,2-Dichloro-1-phenyl-2,2-difluoroethane, also known as DDT (dichlorodiphenyltrichloroethane), is a synthetic chemical compound that was widely used as an insecticide during the mid-20th century. It is an organochlorine compound with the molecular formula C14H9Cl5, characterized by the presence of two chlorine atoms attached to the ethyl group, a phenyl group, and two fluorine atoms. DDT was highly effective in controlling insect-borne diseases such as malaria, typhus, and yellow fever, but its extensive use led to severe environmental and health concerns due to its persistence in the environment, bioaccumulation in the food chain, and potential carcinogenic effects. As a result, DDT has been banned or restricted in many countries worldwide.

434-44-6

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434-44-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 434-44-6 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 4,3 and 4 respectively; the second part has 2 digits, 4 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 434-44:
(5*4)+(4*3)+(3*4)+(2*4)+(1*4)=56
56 % 10 = 6
So 434-44-6 is a valid CAS Registry Number.

434-44-6Relevant academic research and scientific papers

THE PREPARATION OF ALPHA-HALO-BETA, BETA-DIFLUOROSTYRENES

Burton, D. J.,Anderson, A. L.,Takei, R.,Koch, H. F.,Shih, T. L.

, p. 229 - 236 (1980)

Halogenation of β,β-difluorostyrene gave excellent yields of PhCHXCF2X (X = Cl, Br).Li2CO3/DMF, NaOEt/EtOH, and KOBu/hexane promoted dehydrohalogenation of PhCHXCF2X (X = Cl, Br) gave reasonably good isolated yields of the titled olefins.

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