Congo Red

SIGMA/C6277 - certified by the BSC, BioXtra

Synonym: Congo Red 4B; Cosmos Red; Cotton Red B; Cotton Red C; Direct Red 28; Direct Red R; Direct Red Y

CAS Number: 573-58-0
Empirical Formula (Hill Notation): C₃₂H₂₂N₆Na₂O₆S₂
Molecular Weight: 696.66
EC Number: 209-358-4
MDL Number: MFCD00004028
Linear Formula: C₃₂H₂₂N₆Na₂O₆S₂
Product Type: Chemical

Catalog Number	PKG Qty.	Price


45-C6277-25G	25 g	$227.00 1/EA	Add To Favorites

This picture is provided solely for illustration purposes. Optical properties of the actual product may deviate. Relevant product information is printed on labeled products and other accompanying or available information material. This image depicts SKU: C6277-25G

Properties
Descriptions
Safety Info.
Basic Data

agency	certified by the BSC
application(s)	diagnostic assay manufacturing hematology histology
composition	Dye content, ≥85%
form	powder
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+;;
InChI key	IQFVPQOLBLOTPF-HKXUKFGYSA-L
mp	>360 °C (lit.)
product line	BioXtra
Quality Level	200
SMILES string	[Na+].[Na+].Nc1c(cc(c2ccccc12)S([O-])(=O)=O)N=Nc3ccc(cc3)-c4ccc(cc4)N=Nc5cc(c6ccccc6c5N)S([O-])(=O)=O
solubility	H₂O: 10 mg/mL
storage temp.	room temp
technique(s)	microbe id \| staining: suitable

Application:	Certified for use as a counterstain for alum based hematoxylin and in the Highman or the Churukian modification of Puchtler′s amyloid stain.
Application:	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.
Packaging:	25 g in glass bottle

Symbol	GHS08
Signal word	Danger
Hazard statements	H350 - H361d
Precautionary statements	P201 - P202 - P280 - P308 + P313 - P405 - P501
Hazard Codes	T
Risk Statements	45-63-36
Safety Statements	53-45
RIDADR	NONH for all modes of transport
WGK Germany	WGK 3

mp	>360 °C (lit.)
Storage Temp.	room temp
Colour Index Number	22120
UNSPSC	12171500

To Order From a Quote