1,3-Naphthalenedisulfonic acid, 4-amino-6-((4'-((1,8-dihydroxy-3,6-disulfo-2-naphthalenyl)azo)-3,3'-dimethoxy(1,1'-biphenyl)-4-yl)azo)-5-hydroxy-,tetrasodium salt 68084-23-1 EINECS 268-434-5 Tetrasodium 4-amino-6-((4'-((1,8-dihydroxy-3,6-disulphonato-2-naphthyl)azo)-3,3'-dimethoxy(1,1'-biphenyl)-4-yl)azo)-5-hydroxynaphthalene-1,3-disulphonate