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Polychlorinated Biphenyls

Dec 31, 2016

Alias: chloride joint benzene; PCBs by chlorine atomic number or chlorine of hundred points content respectively be label, China habits Shang by joint benzene Shang was chlorine replaced of number (regardless of its replaced location) will PCB is divided into three chlorine joint benzene (PCB3), and four chlorine joint benzene (PCB4), and five chlorine joint benzene (PCB5), and six chlorine joint benzene (PCB6), and seven chlorine joint benzene (PCB7), and eight chlorine joint benzene (PCB8), and nine chlorine joint benzene (PCB9), and 10 chlorine joint benzene (PCB10). PCBs belong to a carcinogen, easy to accumulate in fatty tissue, brain, skin and viscera of diseases, and affect the nervous, reproductive and immune systems.

Polychlorinated biphenyls are Germany H. Schmidt and G. Schultz in 1881 was the first synthesis. United States in 1929, the first production, the mid-60, polychlorinated biphenyl production reached a peak in the world, an annual output of about 100,000 tons. It is estimated that world PCB production and application of well over 1 million tons, which has 1/4 to 1/3 into the human environment, hazards.