N,N'-Bis(naphthalen-1-yl)-N,N'-bis(phenyl)-benzidine N,N'-Bis(naphthalen-1-yl)-N,N'-bis(phenyl)-benzidine Synonyms: N,N'-Di-[(1-naphthyl)-N,N'-diphenyl]-1,1'-biphenyl)-4,4'-diamine; alpha-NPB; N,N'-Bis- (1-naphthalenyl)-N,N'-bis-phenyl-(1,1'-biphenyl)-4,4'-diamine CAS NO.: 123847-85-8 Formula: C44H32N2 Weight: 588.73828