Trypan blue

Synonyms:  Tolidine-disazo-bis-8-amino-1-naphthol-3,6-disulphonic acid tetrasodium salt, CI 23850, 3,3′-Dimethyl-4,4′-bis(5-amino-4-hydroxy-2,7-disulphonaphthyl-3-azo)-[1,1′-biphenyl] tetrasodium salt, Benzamine blue, Trypan blue sodium salt, Direct Blue 14, Diphenyl Blue, AzidinBlue, Sodium 3,3'-((3,3'-dimethyl-[1,1'-biphenyl]-4,4'-diyl)bis(diazene-2,1-diyl))bis(5-amino-4-hydroxynaphthalene-2,7-disulphonate)