Synonyms: 4,4'-(Piperazine-1,4-diylbis((6-chloro-1,3,5-triazine-4,2-diyl)imino))bis(5-hydroxy-6-((4-methyl-2-sulphophenyl)azo)naphthalene-2,7-disulphonic) acid, potassium sodium salt;2,7-Naphthalenedisulfonic acid, 4,4'-(1,4-piperazinediylbis((6-chloro-1,3,5-triazine-4,2-diyl)imino))bis(5-hydroxy-6-((4-methyl-2-sulfophenyl)azo)-, potassium sodium salt