2,7-Naphthalenedisulfonic acid, 3,3'-((3,3'-dimethoxy(1,1'-biphenyl)-4,4'-diyl)bis(azo))bis(5-amino-4-hydroxy-, dilithium disodium salt 3,3'-((3,3'-Dimethoxy-4,4'-biphenylene)bis(azo))bis(5-amino-4-hydroxy-2,7-naphthalenedisulfonic acid), lithium sodium salt (1:2:2) 75659-73-3