2,7-Naphthalenedisulfonic acid, 4-amino-3-4-(2,4-diaminophenyl)azophenylazo-5-hydroxy-6-(4-sulfophenyl)azo-, trisodium salt

trisodium 4-amino-3-[[4-[(2,4-diaminophenyl)azo]phenyl]azo]-5-hydroxy-6-[(4-sulphonatophenyl)azo]naphthalene-2,7-disulphonate

4-Amino-3-[4-(2,4-diaminophenylazo)phenylazo]-5-hydroxy-6-[4-(sodiosulfo)phenylazo]-2,7-naphthalenedisulfonic acid disodium salt