3,3',5,5'-Tetramethyl-[1,1'-biphenyl]-4,4'-diamine
https://www.resbioagro.com/shop/fm-in-da00i9sj-33-55-tetramethyl-11-biphenyl-44-diamine-82612
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Tetramethyl Biphenyl Diamine, monomer for epoxy resin, polymer synthesis, and lab research.
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