1 5CL 1,2,3,4,5-pentachlorobenzene 1.000 2 PCI Pentachlorophenol 0.917 3 TCZ 1,3,5-trichloro-benzene 0.818 4 T6C 2,4,6-trichlorophenol 0.750 5 TC7 2,4,5-trichlorophenol 0.750 6 YAN 1,2-dichlorobenzene 0.727