Synonyms: Pyridinium, 1,1'-((6,13-dichloro-4,11-disulfo-3,10-triphenodioxazinediyl)bis(imino-2,1-ethanediylimino(6-((2,5-disulfophenyl)amino)-1,3,5-triazine-4,2-diyl)))bis(3-carboxy-, bis(inner salt), hexasodium salt;Pyridinium, 1,1'-((6,13-dichloro-4,11-disulfo-3,10-triphenodioxazinediyl)bis(imino-2,1-ethanediylimino(6-((2,5-disulfophenyl)amino)-1,3,5-triazine-4,2-diyl)))bis(3-carboxy-, bis(inner salt), sodium salt (1:6);Pyridinium, 1,1'-((6,13-dichloro-4,11-disulfo-3,10-triphenodioxazinediyl)bis(imino-2,1-ethanediylimino(6-((2,5-disulfophenyl)amino)-1,3,5-triazine-4,2-diyl)))bis(3-carboxy-, dihydroxide, bis(inner salt), hexasodium salt