Abstract
Chlorinated hydrocarbons, particularly dichlorodiphenyl trichloroethane (DDT) and polychlorinated biphenyls(PCBs), have been widely found in the environment due to their persistency i.e. chemical and biological stability. Recently, the production and usage of PCBs was strictly regulated and the usage in the open system was prohibited in many countries. The solvent for carbonless paper, which was one of the main use of PCBs has been replaced by the aromatic hydrocarbons which contain no halogens. Diisopropylnaphthalene (DIPN) (Fig.l) has been widely used as one of the substitutes for PCBs. Kawai(1) reported the distriFig.] Syntheses of LabelJed Compounds bution and excretion of 3H-DIPN in mice and the bioaccumulation of 3H-DIPN 3H-DIPN in carp and gray --R2 R2 /CH3
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