Synonyms: 4,4'-Bi-2,6-xylenol(6CI,7CI);4,4'-Biphenyldiol, 3,3',5,5'-tetramethyl- (8CI);2,2',6,6'-Tetramethyl-p,p'-biphenol;2,2',6,6'-Tetramethylbiphenol;3,3',5,5'-Tetramethyl-1,1'-biphenyl-4,4'-diol;3,3',5,5'-Tetramethyl-4,4'-dihydroxybiphenyl;3,3',5,5'-Tetramethylbisphenol;4,4'-Dihydroxy-3,3',5,5'-tetramethylbiphenyl;NSC 128399;NSC 93821;TM-BPL;