Summary
Chlorinated dibenzofurans, including 1 ppm of tetrachlorinated dibenzofuran(s), and pentachloronaphthalene have been identified by combined gas chromatography/mass spectrometry in a polychlorinated biphenyl of Japanese manufacture (KC-400). The question of whether chlorinated dibenzofurans in KC-400 may have contributed to the reported Yusho incident is thus raised.
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Roach, J.A.G., Pomerantz, I.H. The finding of chlorinated dibenzofurans in a Japanese polychlorinated biphenyl sample. Bull. Environ. Contam. Toxicol. 12, 338–342 (1974). https://doi.org/10.1007/BF01709129
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DOI: https://doi.org/10.1007/BF01709129