2,7-Naphthalenedisulfonic acid, 3,3'-(1,2-ethenediylbis((3-sulfo-4,1-phenylene)azo))bis(5-amino-4-hydroxy-, hexalithium salt 4,4'-Bis((8-amino-1-hydroxy-3,6-disulfo-2-naphthyl)azo)-2,2'-stilbenedisulfonic acid, hexalithium salt 75701-35-8