CHLORAZOL BLACK BH; CALCOMINE DIAZO BLACK BHD; DIAZOPHENYL BLACK BH; DIAZO BLACK BH; DIAZO BLACK BHN; PONTAMINE DEEP BLUE BH; DirectBlueBH; diazo black; melantherine bh; diamine black; azomine black 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