CAS 573-58-0
:Congo red
Description:
Congo red is a synthetic dye belonging to the azo dye family, characterized by its vibrant red color. Its chemical formula is C32H22N6Na2O6S2, and it is known for its ability to bind to proteins, making it useful in various biological applications. Congo red exhibits a unique property of changing color depending on the pH of the solution, appearing red in acidic conditions and blue in alkaline environments, a phenomenon known as a pH indicator. It is commonly used in histology for staining amyloid deposits in tissues, aiding in the diagnosis of diseases such as Alzheimer's. Additionally, Congo red has been employed in textile dyeing and as a biological stain. However, it is important to note that Congo red has been associated with potential health risks, including toxicity and carcinogenicity, leading to regulatory scrutiny in some applications. Proper safety measures should be taken when handling this compound in laboratory or industrial settings.
Formula:C32H24N6O6S2·2Na
InChI: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;;/h1-18H,33-34H2,(H,39,40,41)(H,42,43,44);;
InChI key:InChIKey=ZADMRLXZHUPGBF-UHFFFAOYSA-N
SMILES:S(=O)(=O)(O)C=1C2=C(C(N)=C(N=NC3=CC=C(C=C3)C4=CC=C(N=NC5=C(N)C6=C(C(S(=O)(=O)O)=C5)C=CC=C6)C=C4)C1)C=CC=C2.[Na]
Synonyms:- 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
- Atlantic Congo Red
- Atul Congo Red
- Azocard Red Congo
- Benzo Congo Red
- Brasilamina Congo 4B
- Congo Red 4B
- Congo Red 4BS
- Congo Red 4BX
- Congo Red CR
- Congo Red H
- Congo Red K
- Congo Red L
- Congo Red M
- Congo Red N
- Congo Red R
- Congo Red RS
- Congo Red Stain
- Congo Red TS
- Congo Red W
- Congo Red WS
- Congo Red sodium salt
- Congo red (0.1% in water)
- Congo red (0.1% in water)[for titration]
- Congo red disodium salt
- Cotton Red 4BC
- Cotton Red 5B
- Cotton Red L
- Diacotton Congo Red
- Dinatrium-3,3'-[[1,1'-biphenyl]-4,4'-diylbis(azo)]bis(4-aminonaphthalin-1-sulfonat)
- Direct Congo Red
- Direct Red 28
- Direct Red C
- Direct Red DC-CF
- Direct Red K
- Direct Red R
- Direct Scarlet 4B
- 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
- Erie Congo 4B
- Haemomedical
- Haemonorm
- Hemorrhagyl
- Hispamin Congo 4B
- Kayaku Congo Red
- Kongorot
- Mitsui Congo Red
- Peeramine Congo Red
- Red K
- Red K (dye)
- Sodium Diphenyl-Bis-{Naphthylamine) Sulfonate}
- Solucongo
- Sugai Congo Red
- Tertrodirect Red C
- Trisulfon Congo Red
- Vondacel Red CL
- disodium 3,3'-[biphenyl-4,4'-diyldi(E)diazene-2,1-diyl]bis(4-aminonaphthalene-1-sulfonate)
- C.I. Direct Red 28, disodium salt
- C.I. Direct Red 28
- C.I. Direct Red 28, disodium salt
- Congo red
- C.I. Direct Red 28, disodium salt (8CI)
- See more synonyms
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Congo Red
CAS:Controlled ProductFormula:C32H22N6Na2O6S2Purity:>98.0%(HPLC)Color and Shape:Dark red to Brown powder to crystalMolecular weight:696.66Congo Red, indicator grade
CAS:Controlled ProductCongo red is useful for staining and visual detection of amyloid deposits. It inhibits the accumulation of the scrapie-associated, protease-resistant isoform of protein PrP without affecting the metabolism of the normal isoform. This Thermo Scientific Chemicals brand product was originally part ofFormula:C32H22N6Na2O6S2Color and Shape:Powder, Red to red-brownMolecular weight:696.66Congo Red
CAS:Controlled ProductCongo Red (Direct Red 28) is an azo dye. It binding been used as a diagnostic test for the presence of amyloid in tissue sections.Formula:C32H22N6Na2O6S2Purity:96.97%Color and Shape:Red SolidMolecular weight:696.66Direct Red 28
CAS:Controlled ProductFormula:C32H22N6Na2O6S2Purity:95%Color and Shape:SolidMolecular weight:696.6632Congo Red
CAS:Controlled ProductCongo RedFormula:C32H22N6Na2O6S2Purity:BSColor and Shape:SolidMolecular weight:696.66Congo Red (C.I. 22120); 97%
CAS:Controlled ProductFormula:C32H22N6Na2O6S2Purity:≥ 97.0%Color and Shape:Red powderMolecular weight:696.67Direct Red 28
CAS:Controlled ProductFormula:C32H22N6O6S2NaColor and Shape:NeatMolecular weight:696.66Congo Red (90%)
CAS:Controlled ProductApplications Congo Red is a secondary diazo dye that is used to stain β sheet aggregates. Congo Red can be used to diagnose amyloidosis. Dyes and metabolites, Environmental Testing
References Falk, R. H. et al.: N Engl J Med 337, 898 (1997); Ishii, W., et al.: intern Med. May;42, 400 (2003)Formula:C32H22N6O6S2·2NaPurity:90%Color and Shape:NeatMolecular weight:696.66Congo Red
CAS:Controlled ProductSodium 3,3'-([1,1'-biphenyl]-4,4'-diylbis(diazene-2,1-diyl))bis(4-aminonaphthalene-1-sulfonate)Formula:C32H22N6Na2O6S2Purity:IndMolecular weight:696.66Congo Red (C.I. 22120)
CAS:Controlled ProductFormula:C32H22N6Na2O6S2Purity:≥ 70.0%Color and Shape:Red powderMolecular weight:696.67Direct Red 28 in Methanol
CAS:Controlled ProductMethanolFormula:C32H22N6Na2O6S2Molecular weight:696.7Direct Red 28 in Methanol:Water=4:1
CAS:Controlled ProductMethanol:Water=4:1Formula:C32H22N6Na2O6S2Molecular weight:696.7Congo Red ACS, 75%
CAS:Controlled ProductFormula:C32H22N6O6S2Na2Color and Shape:Brownish red, Powder, Clear, Passe testMolecular weight:696.66
