1,1-Dichloro-2,2-bis-(4-chloro-phenyl)-1-fluoro-ethane, also known as DDT (dichlorodiphenyltrichloroethane), is a synthetic organochlorine compound historically used as an insecticide. It was widely employed to control pests in agriculture and to prevent the spread of diseases like malaria. DDT is characterized by its persistence in the environment, bioaccumulation in the food chain, and potential for long-range transport. Due to its harmful effects on the environment and non-target species, including its role in thinning eggshells of birds and leading to population declines, DDT has been banned or restricted in many countries. Its chemical structure features a central ethyl group with two chlorine atoms, two 4-chlorophenyl groups, and a fluorine atom, contributing to its stability and lipophilic nature, which allows it to accumulate in fatty tissues. Despite its past effectiveness, the environmental and health concerns associated with DDT have led to the search for alternative, less harmful pesticides.
The CAS Registry Mumber 3834-62-6 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 3,8,3 and 4 respectively; the second part has 2 digits, 6 and 2 respectively. Calculate Digit Verification of CAS Registry Number 3834-62: (6*3)+(5*8)+(4*3)+(3*4)+(2*6)+(1*2)=96 96 % 10 = 6 So 3834-62-6 is a valid CAS Registry Number.