2,7-Naphthalenedisulfonic acid, 3-hydroxy-4-((4'-((1-hydroxy-6-(phenylamino)-3-sulfo-2-naphthalenyl)azo)-3,3'-dimethoxy(1,1'-biphenyl)-4-yl)azo)- 3-Hydroxy-4-((4'-((1-hydroxy-6-(phenylamino)-3-sulpho-2-naphthyl)azo)-3,3'-dimethoxy(1,1'-biphenyl)-4-yl)azo)naphthalene-2,7-disulphonic acid 63216-84-2 EINECS 264-003-0