2,7-Naphthalenedisulfonic acid, 4-amino-5-hydroxy-, diazotized, coupled with diazotized 3,3'-dichloro(1,1'-biphenyl)-4,4'-diamine and 5,5'-((5-hydroxy-1,3-phenylene)bis(oxy))bis(1,3-benzenediol), sodium salts 98073-04-2 EINECS 308-562-1