英文名称:Congo Red; Disodium 3,3'-[Biphenyl-4,4'-Diyldi(E)Diazene-2,1-Diyl]Bis(4-Aminonaphthalene-1-Sulfonate); Direct Red 28; Disodium 4-Amino-3-[4-[4-[(1-Amino-4-Sulfonato-2-Naphthyl)Azo]Phenyl]Phenyl]Azo-Naphthalene-1-Sulfonate; C.I. Direct Red 28, Disodium Salt; Direct Scarlet 4B; C.I. Direct Red 28, Disodium Salt (8Ci); C.I. Direct Red 28, Disodium Salt (8Ci); Direct Red 28; Congo Red (0.1% In Water)[For Titration]; C.I. 22120; C.I. Direct Red 28, Disodium Salt; Congo Red; Congo Red (0.1% In Water)[For Titration]; Disodium 4-Amino-3-[4-[4-[(1-Amino-4-Sulfonato-2-Naphthyl)Azo]Phenyl]Phenyl]Azo-Naphthalene-1-Sulfonate; Disodium 3,3'-[Biphenyl-4,4'-Diyldi(E)Diazene-2,1-Diyl]Bis(4-Aminonaphthalene-1-Sulfonate); Congo Red (0.1% In Water); Congo Red (0.1% In Water); C.I. Direct Red 28