c.i.directviolet28,disodiumsalt

3’-dimethyl[1,1’-biphenyl]-4-yl]azo]-)azo]-disodiumsalt

3’-dimethyl(1,1’-biphenyl)-4-yl)azo)-)azo)-disodiumsalt

1-naphthalenesulfonicacid,4-hydroxy-3-[[4’-[(1-hydroxy-5-sulfo-2-naphthalenyl