4-amino-3-[[4-[(2,4-diaminophenyl)azo]phenyl]azo]-5-hydroxy-6-[(4-sulphophenyl)azo]naphthalene-2,7-disulphonic acid, potassium sodium salt

4-Amino-3-[[4-[(2,4-diaminophenyl)azo]phenyl]azo]-5-hydroxy-6-[(4-sulfophenyl)azo]-2,7-naphthalenedisulfonic acid/potassium/sodium,(1:x:x) salt