2009-08-06T15:29:59.8316dcbfd7-413e-4048-a7e1-690fd72684ca2020-01-03T14:27:05.06false2,2',3,4,4',5'-hexachlorobiphenyl (CB138) + 2,3,3',4',5,6-hexachlorobiphenyl (CB163)