1,1,1,4-Tetrachlor-Δ2-trans-buten, also known as chlordane, is a chlorinated hydrocarbon compound with the chemical formula C4Cl4. It is a colorless to pale yellow oily liquid with a strong, pungent odor. Chlordane is a broad-spectrum insecticide that was widely used in the past for termite control and as a soil pesticide. However, due to its persistence in the environment, potential for bioaccumulation, and health risks, including carcinogenicity, chlordane has been banned or restricted in many countries. It is also classified as a persistent organic pollutant (POP) and is listed under the Stockholm Convention on Persistent Organic Pollutants.
The CAS Registry Mumber 1871-62-1 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,8,7 and 1 respectively; the second part has 2 digits, 6 and 2 respectively. Calculate Digit Verification of CAS Registry Number 1871-62: (6*1)+(5*8)+(4*7)+(3*1)+(2*6)+(1*2)=91 91 % 10 = 1 So 1871-62-1 is a valid CAS Registry Number.