Biphenyl,2,4,4'-trichloro- (7CI); 2,4,4'-Trichloro-1,1'-biphenyl;2,4,4'-Trichlorobiphenyl; 2',4,4'-Trichlorobiphenyl; 4,2',4'-Trichloro-1,1'-biphenyl;4,2',4'-Trichlorobiphenyl; CB 28; K 28; PCB 28
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