CAS 6473-08-1 Disodium;5-amino-3-[(4-aminophenyl)diazenyl]-6-[[4-[3-[[2,4-diamino-5-[(4-aminophenyl)diazenyl]phenyl]diazenyl]phenyl]phenyl]diazenyl]-4-hydroxynaphthalene-2,7-disulfonate (HCID 165363063)|Huagongshe