Trans-1,2-bis-(4-chlorophenyl)-1,2-bis-methylsulfonyl-ethylene, also known as DDD or TDE, is an organochlorine compound that belongs to the class of chlorinated ethylenes. It is a synthetic chemical with the molecular formula C14H12Cl2O4S2. DDD is a derivative of dichlorodiphenyltrichloroethane (DDT), which was widely used as an insecticide. The compound features two 4-chlorophenyl groups connected by a 1,2-bis-methylsulfonylethylene bridge, which gives it a unique structure. DDD was primarily used for its insecticidal properties, targeting pests in agriculture and for disease vector control. However, due to its persistence in the environment and potential health risks, its use has been largely discontinued in many countries. The compound's chemical properties and environmental impact have been subjects of extensive research, leading to a better understanding of its behavior in ecosystems and the development of alternative pest control methods.
The CAS Registry Mumber 5230-79-5 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 5,2,3 and 0 respectively; the second part has 2 digits, 7 and 9 respectively. Calculate Digit Verification of CAS Registry Number 5230-79: (6*5)+(5*2)+(4*3)+(3*0)+(2*7)+(1*9)=75 75 % 10 = 5 So 5230-79-5 is a valid CAS Registry Number.