85118-36-1

2,7-Naphthalenedisulfonic acid, 3-[[4-[2-[4-[[8-(acetylamino)-1-hydroxy-3,6-disulfo-2-naphthalenyl]azo]-2-sulfophenyl]ethenyl]-3-sulfophenyl]azo]-5-amino-4-hydroxy-6-[(4-sulfophenyl)azo]-, heptasodium salt