Direct Red 28

CAS: 573-58-0

Ref. 04-C12965400

Product Information

• Name: Direct Red 28
• Synonyms: Congo red,1-Naphthalenesulfonic acid, 3,3'-[[1,1'-biphenyl]-4,4'-diylbis(2,1-diazenediyl)]bis[4-amino-, sodium salt (1:2) (ACI), 1-Naphthalenesulfonic acid, 3,3'-[[1,1'-biphenyl]-4,4'-diylbis(azo)]bis[4-amino-, disodium salt (9CI), C.I. Direct Red 28, disodium salt (8CI), Atlantic Congo Red, Atul Congo Red, Azocard Red Congo, Benzo Congo Red, Brasilamina Congo 4B, C.I. 22120, C.I. Direct Red 28, Congo Red 4B, Congo Red 4BS, Congo Red 4BX, Congo Red CR, Congo red disodium salt, Congo Red H, Congo Red K, Congo Red L, Congo Red M, Congo Red N, Congo Red R, Congo Red RS, Congo Red sodium salt, Congo Red TS, Congo Red W, Congo Red WS, Cotton Red 4BC, Cotton Red 5B, Cotton Red L, Diacotton Congo Red, Direct Red C, Direct Red DC-CF, Direct Red K, Direct Red R, Direct Scarlet 4B, Erie Congo 4B, Haemomedical, Haemonorm, Hemorrhagyl, Hispamin Congo 4B, Kayaku Congo Red, Mitsui Congo Red, Peeramine Congo Red, Red K (dye), Solucongo, Sugai Congo Red, Tertrodirect Red C, Trisulfon Congo Red, Vondacel Red CL, 1-Naphthalenesulfonic acid, 3,3'-[[1,1'-biphenyl]-4,4'-diylbis(azo)]bis[4-amino-, disodium salt, 1-Naphthalenesulfonic acid, 3,3'-[[1,1'-biphenyl]-4,4'-diylbis(2,1-diazenediyl)]bis[4-amino-, sodium salt (1:2), 3,3'-[(1,1'-Biphenyl)-4',4'-diyl)bis(azo)]bis[4-amino-1-naphthalenesulfonic acid, disodium salt, 3,3'-[[1,1'-Bifenil]-4,4'-Diilbis(Azo)]Bis(4-Aminonaftaleno-1-Sulfonato) De Disodio, 3,3'-[[1,1'-Biphenyl]-4,4'-diylbis(azo)]bis(4-aminonaphtalene-1-sulfonate) de disodium, Congo Red Stain, Congo red (0.1% in water), Congo red (0.1% in water)[for titration], Dinatrium-3,3'-[[1,1'-biphenyl]-4,4'-diylbis(azo)]bis(4-aminonaphthalin-1-sulfonat), Direct Congo Red, Direct Red 28, Disodium 3,3'-[[1,1'-Biphenyl]-4,4'-Diylbis(Azo)]Bis(4-Aminonaphthalene-1-Sulphonate), Disodium 4-Amino-3-[4-[4-[(1-Amino-4-Sulfonato-2-Naphthyl)Azo]Phenyl]Phenyl]Azo-Naphthalene-1-Sulfonate, Kongorot, Red K, Sodium Diphenyl-Bis-{Naphthylamine) Sulfonate}, disodium 3,3'-[biphenyl-4,4'-diyldi(E)diazene-2,1-diyl]bis(4-aminonaphthalene-1-sulfonate)
• Brand: Doctor Ehrenstorfer

Chemical properties

• Molecular weight: 696.66
• Formula: C₃₂H₂₂N₆O₆S₂Na
• Color/Form: Neat
• InChI: 2*+1/p-2, /h1-18H,33-34H2,(H,39,40,41)(H,42,43,44), /q, , , InChI=1S/C32H24N6O6S2.2Na/c33-31-25-7-3-1-5-23(25)29(45(39,40)41)17-27(31)37-35-21-13-9-19(10-14-21)20-11-15-22(16-12-20)36-38-28-18-30(46(42,43)44)24-6-2-4-8-26(24)32(28)34
• SMILES: Nc1c(N=Nc2ccc(-c3ccc(N=Nc4cc(S(=O)(=O)[O-])c5ccccc5c4N)cc3)cc2)cc(S(=O)(=O)[O-])c2ccccc12.[Na+].[Na+]