Congo Red - BioReagent, certified by the Biological Stain Commission , CAS No.573-58-0

CAS: 573-58-0 Cat. No.: C755702 Formula: C₃₂H₂₂N₆Na₂O₆S₂ Molecular Weight: 696.66 EC Number: 209-358-4

GRADE & PURITY BioReagent, certified by the Biological Stain Commission

Synonyms

Direct Red 28

Storage

Room temperature

Shipped In

Normal

Overview

Certified for use as a counterstain for alum based hematoxylin and in the Highman or the Churukian modification of Puchtler′s amyloid stain.
Congo red has been used for the staining of β amyloid peptides. 

Biochem/physiol Actions：

Congo red is a benzidine-based anionic diazo dye. It is a histological dye which binds to many amyloid proteins and is used for the quantification of amyloid β-peptide aggregation. Congo red also interacts with β-D-glucans, polysaccharides containing continuous β-(1→4)-linked D-glucopyranosyl units and some hemicellulosic galactoglucomannans.

Specifications

Synonyms

Direct Red 28

Specifications & Purity

BioReagent, certified by the Biological Stain Commission

Biochemical and Physiological Mechanisms

Congo red is a benzidine-based anionic diazo dye. It is a histological dye which binds to many amyloid proteins and is used for the quantification of amyloid β-peptide aggregation. Congo red also interacts with β-D-glucans, polysaccharides containing cont

Storage

Room temperature

Shipped In

Normal

Grade

BioReagent

Names and Identifiers

Canonical Smiles

C1=CC=C2C(=C1)C(=CC(=C2N)N=NC3=CC=C(C=C3)C4=CC=C(C=C4)N=NC5=C(C6=CC=CC=C6C(=C5)S(=O)(=O)[O-])N)S(=O)(=O)[O-].[Na+].[Na+]

IUPAC Name

disodium;4-amino-3-[[4-[4-[(1-amino-4-sulfonatonaphthalen-2-yl)diazenyl]phenyl]phenyl]diazenyl]naphthalene-1-sulfonate

InChIKey

IQFVPQOLBLOTPF-UHFFFAOYSA-L

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);;/q;2*+1/p-2

Isomeric SMILES

C1=CC=C2C(=C1)C(=CC(=C2N)N=NC3=CC=C(C=C3)C4=CC=C(C=C4)N=NC5=C(C6=CC=CC=C6C(=C5)S(=O)(=O)[O-])N)S(=O)(=O)[O-].[Na+].[Na+]

Molecular Weight

696.66

Reaxy-Rn

3894858

Reaxys-RN_link_address

https://www.reaxys.com/reaxys/secured/hopinto.do?context=S&query=IDE.XRN=3894858&ln=

Taxonomic Classification

Taxonomy Tree

• Kingdom Organic compounds
  • Superclass Benzenoids
    • Class Benzene and substituted derivatives
      • Subclass Biphenyls and derivatives

• Kingdom: Organic compounds
• Superclass: Benzenoids
• Class: Benzene and substituted derivatives
• Subclass: Biphenyls and derivatives
• Intermediate Tree Nodes: Not available
• Direct Parent: Benzidines
• Alternative Parents: 1-naphthalene sulfonic acids and derivatives 1-naphthalene sulfonates 1-sulfo,2-unsubstituted aromatic compounds Sulfonyls Organosulfonic acids Azo compounds Propargyl-type 1,3-dipolar organic compounds Primary amines Organopnictogen compounds Organic sodium salts Organic oxides Hydrocarbon derivatives
• Molecular Framework: Aromatic homopolycyclic compounds
• Substituents: Naphthalene sulfonate - 1-naphthalene sulfonic acid or derivatives - Naphthalene sulfonic acid or derivatives - 1-naphthalene sulfonate - Benzidine - Naphthalene - 1-sulfo,2-unsubstituted aromatic compound - Arylsulfonic acid or derivatives - Organic sulfonic acid or derivatives - Organosulfonic acid or derivatives - Organosulfonic acid - Sulfonyl - Azo compound - Propargyl-type 1,3-dipolar organic compound - Organic 1,3-dipolar compound - Organic alkali metal salt - Amine - Organic salt - Organic sodium salt - Primary amine - Organosulfur compound - Organonitrogen compound - Hydrocarbon derivative - Organic oxide - Organopnictogen compound - Organic oxygen compound - Organic nitrogen compound - Aromatic homopolycyclic compound
• Description: This compound belongs to the class of organic compounds known as benzidines. These are organic compounds containing the benzidine skeleton, made up of a biphenyl ring system substituted at the 4- and 4'-positions with a unsubstituted amine group.
• External Descriptors: azo compound

Data sources

1. Djoumbou Feunang Y, Eisner R, Knox C, Chepelev L, Hastings J, Owen G, Fahy E, Steinbeck C, Subramanian S, Bolton E, Greiner R, and Wishart DS. ClassyFire: Automated Chemical Classification With A Comprehensive, Computable Taxonomy. Journal of Cheminformatics, 2016, 8:61.

DOI: 10.1186/s13321-016-0174-y

Chemical and Physical Properties

• Solubility: H 2 O: 10 mg/mL
• Sensitivity: Moisture sensitive
• Melt Point(°C): >360°C
• Molecular Weight: 696.700 g/mol
• Hydrogen Bond Donor Count: 2
• Hydrogen Bond Acceptor Count: 12
• Rotatable Bond Count: 5
• Exact Mass: 696.084 Da
• Monoisotopic Mass: 696.084 Da
• Topological Polar Surface Area: 233.000 Ų
• Heavy Atom Count: 48
• Formal Charge: 0
• Complexity: 1180.000
• Isotope Atom Count: 0
• Defined Atom Stereocenter Count: 0
• Undefined Atom Stereocenter Count: 0
• Defined Bond Stereocenter Count: 0
• Undefined Bond Stereocenter Count: 0
• The total count of all stereochemical bonds: 0
• Covalently-Bonded Unit Count: 3

XLogP3