Merck, C6767-100G, Congo Red

Name: Congo Red
Brand: Merck
SKU: C6767-100G

Size:100 g, Congo Red 4B, Cosmos Red, Cotton Red B, Cotton Red C, Direct Red 28, Direct Red R, Direct Red Y, Dye content ≥35 %

Available Catalog Numbers

C6767-100G C6767-25G

Catalog Number: C6767-100G

Pricing

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Category

Special Stains

Pack Size100 g

TagsClinical & Diagnostics Tissue Diagnostics Hematology Stains

CollectionsMerck Tissue Diagnostics – Universal Reagents for Histology & IHC Merck Cell Culture Supplements & Reagents: Complete Solutions for Research & Bioproduction Merck Roche Life Science Products for PCR, RT‑PCR & Nucleic Acid Purification

Description

Application
Congo red has been used as a histochemical stain for the quantification of amyloid deposits in brain tissues.
It has been used as a cell wall inhibiting agent in fungus Cryptococcus neoformans.
It has also been used to study microstructural details in the cell walls of raw potato and fried potato using confocal microscopy.

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

General

Quality Level
UNSPSC Code	12171500
Web Name Suffix Override	Dye content ≥35 %, Powder
NACRES	NA.47
PubChem Substance ID	24892892
EC Number	209-358-4
MDL number	MFCD00004028
Colour Index Number	22120
Beilstein/REAXYS Number	3894858
InChI key	IQFVPQOLBLOTPF-HKXUKFGYSA-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/b37-35+,38-36+;;
SMILES string	[Na+].[Na+].Nc1c(cc(c2ccccc12)S([O-])(=O)=O)\N=N\c3ccc(cc3)-c4ccc(cc4)\N=N\c5cc(c6ccccc6c5N)S([O-])(=O)=O
form	powder
composition	Dye content, ≥35%
technique(s)	titration: suitable
color	red-brown
pH	6.7 (10 g/L)
mp	>360 °C (lit.)
solubility	H2O: 1 mg/mL
application(s)	diagnostic assay manufacturinghematologyhistology
storage temp.	room temp

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