Synonyms: BUTTPARK 99\57-76;[4-(3,4-DICHLOROPHENYL)PHENYL]SULFONYL CHLORIDE;[4-(3,4-DICHLOROPHENYL)PHENYL]SULPHONYL CHLORIDE;3',4'-DICHLORO[1,1'-BIPHENYL]-4-SULFONYL CHLORIDE;3',4'-DICHLORO-BIPHENYL-4-SULFONYL CHLORIDE;[1,1'-BIPHENYL]-4-SULFONYL CHLORIDE, 3',4'-DICHLORO-