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234610

Sigma-Aldrich

Congo Red, High Purity

An amyloidophylic dye that specifically stains stacked β sheet aggregates.

Synonym(s):

Congo Red, High Purity, 3,3ʹ-[(1,1ʹ-Biphenyl)-4,4ʹ-diylbis(azo)]bis(4-amino-1-naphthalenesulfonic Acid) 2Na

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About This Item

Empirical Formula (Hill Notation):
C32H22N6O6S2 · 2Na
CAS Number:
573-58-0
Molecular Weight:
696.66
MDL number:
MFCD00004028
UNSPSC Code:
12352200

Quality Level

100

Assay

≥75% dye basis

form

crystalline solid

manufacturer/tradename

Calbiochem®

storage condition

OK to freeze
protect from light

color

rust

solubility

water: 10 mg/mL
ethanol: soluble

shipped in

ambient

storage temp.

15-25°C

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

InChI key

IQFVPQOLBLOTPF-UHFFFAOYSA-L

General description

An amyloidophylic dye that specifically stains stacked β sheet aggre-gates. Useful for staining and visual detection of amyloid deposits in nerve tissue. Binds to amyloid fibrils but not to non-polymerized amyloid peptide. Inhibits the accumulation of the scrapie-associated, protease-resistant isoform of protein PrP without affecting the normal isoform possibly through overstabilization of the conformation. It is also shown to inhibit Pot1 Binding to Telomeric DNA.
An amyloidophylic dye that specifically stains stacked β sheet aggregates. Useful for staining and visual detection of amyloid deposits. Does not bind to non-polymerized amyloid peptide. Inhibits the accumulation of the scrapie-associated, protease-resistant isoform of protein PrP without affecting the metabolism of the normal isoform. It is also shown to inhibit Pot1 Binding to Telomeric DNA.

Biochem/physiol Actions

Cell permeable: no
Primary Target
An amyloidophylic dye that specifically stains stacked β sheet aggregates
Product does not compete with ATP.
Reversible: no

Warning

Toxicity: Standard Handling (A)

Reconstitution

Following reconstitution, aliquot and freeze (-20°C). Stock solutions are stable for up to 1 month at room temperature (20°C).

Other Notes

Altschuler, S.E., et al. 2012. Biochemistrin press.
Khurana, R., et al. 2001. J. Biol. Chem.276, 22715.
Fezoui, Y., et al. 2000. Amyloid7, 166.
Fezoui, Y., et al. 2000. Nat. Struct. Biol.7, 1095.
Kramport, M., et al. 2000. Chem. Biol.7, 855.
Kuner, P., et al. 2000. J. Biol. Chem.275, 1673.
Caspi, S., et al. 1998. J. Biol. Chem.273, 3484.
Caughey, B., and Race, A.E. 1992. J. Neurochem.59, 768.
Taylor, D.L., et al. 1974. J. Histochem. Cytochem.22, 1105.

Legal Information

CALBIOCHEM is a registered trademark of Merck KGaA, Darmstadt, Germany

Pictograms

Health hazard
GHS08

Signal Word

Danger

Hazard Statements

H350 - H361d

Hazard Classifications

Carc. 1B - Repr. 2

Storage Class Code

6.1C - Combustible, acute toxic Cat.3 / toxic compounds or compounds which causing chronic effects

WGK

WGK 3

Regulatory Listings

Regulatory Listings are mainly provided for chemical products. Only limited information can be provided here for non-chemical products. No entry means none of the components are listed. It is the user’s obligation to ensure the safe and legal use of the product.

EU REACH SVHC Candidate List

CAS No.

EU REACH Annex XVII (Restriction List)

CAS No.

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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