72927-75-4

1,1'-BIPHENYL]-2,2'-DISULFONIC ACID 4,4'-BIS[(4,5-DIHYDRO-3-METHYL-5-OXO-1-PHENYL-1H-PYRAZOL-4-YL)AZO]-,COMPD. WITH N,N'-DIPHENYLGUANIDINE (1:2)