CALCOMINE DIAZO BLACK BHD;DIAZOPHENYL BLACK BH;DIAZO BLACK BH;DIAZO BLACK BHN;DIRECT BLUE 2;CHLORAZOL BLACK BH;PONTAMINE DEEP BLUE BH;5-amino-3-[[4'-[(7-amino-1-hydroxy-3-sulfo-2-naphthyl)azo][1,1'-biphenyl]-4-yl]azo]-4-hydroxy-2,7-Naphthalenedisulfonic acid, trisodium salt