disodium 4-hydroxy-3-[[4'-[(4-hydroxyphenyl)azo]-3,3'-dimethyl[1,1'-biphenyl]-4-yl]azo]naphthalene-2,7-disulphonate

Disodium 4-hydroxy-3-((4'-((4-hydroxyphenyl)azo)-3,3'-dimethyl(1,1'-biphenyl)-4-yl)azo)naphthalene-2,7- disulphonate

4-Hydroxy-3-[[4'-[(4-hydroxyphenyl)azo]-3,3'-dimethyl-1,1'-biphenyl-4-yl]azo]-2,7-naphthalenedisulfonic acid disodium salt