Congo red
biological dye
Reagent
Code: #126549
Alias
Congo red; direct Congo red, boiled scarlet, direct vermilion, direct scarlet, diphenyl-4,4'-bis[(azo-2-)-1-aminonaphthalene-4-sulfonate sodium]
CAS Number
573-58-0
science Other reagents with same CAS 573-58-0
blur_circular Chemical Specifications
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Molecular Information
Weight
696.66 g/mol
Formula
C₃₂H₂₂N₆Na₂O₆S₂
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Registry Numbers
EC Number
209-358-4
MDL Number
MFCD00004028
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Physical Properties
Melting Point
>360 °C(lit.)
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Storage & Handling
Density
0.995 g/mL at 25 °C
Storage
room temperature
description Product Description
Used as a biological stain in histology to identify amyloid deposits in tissues, aiding in the diagnosis of diseases like Alzheimer's. It acts as a pH indicator, changing color from red to blue in acidic to basic conditions. In textile industries, it serves as a dye for cotton and silk, providing vibrant red hues. Additionally, it is employed in research to study protein aggregation and fibril formation. Its ability to bind cellulose makes it useful in paper and pulp industries for quality testing.
format_list_bulleted Product Specification
| Test Parameter | Specification |
|---|---|
| Appearance | Powder |
| Infrared Spectrum | Conforms To Structure |
| Solubility (Color, C=10 mg/mL in Water) | Dark Red |
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