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Congo Red

Congo Red

$19.50
Congo Red

SKU: 02105099-CF

Synonyms
Cotton Red; Benzo Congo Red; Direct Red 28; C.I. 22120; Sodium Diphenyldiazo-bis(alpha-NAPH-Thylaminesulfonate); Congo Red 4B; Cosmos Red; Direct Red R; Direct Red Y; Cotton Red B; Cotton Red C
CAS Number:
573-58-0
Molecular Formula:
C32H22N6Na2O6S2
Molecular Weight:
696.664 g/mol
Beilstein Registry Number:
3894858
EC Number:
209-358-4
MDL Number:
MFCD00004028
Product Description

Congo Red

Application Notes

In biochemistry and histology, congo red is used to stain microscopic preparates, especially as a cytoplasm and erythrocyte stain. It is used for the visual detection of amyloid in muscle and nerve fresh frozen sections in patients who have amyloidosis. Apple-green birefringence of Congo red stained preparates under polarized light is indicative for the presence of amyloid fibrils. Additionally, congo red is used in microbiological epidemiology to rapidly identify the presence of virulent serotype 2a Shigella flexneri, where the dye binds the bacterium's unique lipopolysaccharide (LPS) structure.

Usage Statement

Unless specified otherwise, MP Biomedical's products are for research or further manufacturing use only, not for direct human use. For more information, please contact our customer service department.

Key Applications

Detection of amyloid | Indicator in testing for free hydrochloric acid in gastric contents

Specifications
SKU 02105099-CF
Alternate Names Cotton Red; Benzo Congo Red; Direct Red 28; C.I. 22120; Sodium Diphenyldiazo-bis(alpha-NAPH-Thylaminesulfonate); Congo Red 4B; Cosmos Red; Direct Red R; Direct Red Y; Cotton Red B; Cotton Red C
Application Notes In biochemistry and histology, congo red is used to stain microscopic preparates, especially as a cytoplasm and erythrocyte stain. It is used for the visual detection of amyloid in muscle and nerve fresh frozen sections in patients who have amyloidosis. Apple-green birefringence of Congo red stained preparates under polarized light is indicative for the presence of amyloid fibrils. Additionally, congo red is used in microbiological epidemiology to rapidly identify the presence of virulent serotype 2a Shigella flexneri, where the dye binds the bacterium's unique lipopolysaccharide (LPS) structure.
Base Catalog Number 105099
Beilstein Registry Number 3894858
CAS # 573-58-0
Color Index 22120
EC Number 209-358-4
Format Powder
Hazard Statements H350-H361d
Melting Point >360 deg C
Molecular Formula C32H22N6Na2O6S2
Molecular Weight 696.664 g/mol
Personal Protective Equipment Eyeshields, full-face particle respirator, Gloves, respirator cartridge, respirator filter
pH SOLN HAVE PH OF 8-9.5
RTECS Number QK1400000
Safety Symbol GHS08
Solubility Sol in <a class="pubchem-internal-link CID-702" href="https://pubchem.ncbi.nlm.nih.gov/compound/ethanol">ethanol</a>; very slightly sol in <a class="pubchem-internal-link CID-180" href="https://pubchem.ncbi.nlm.nih.gov/compound/acetone">acetone</a>; practically insol in ether
Usage Statement Unless specified otherwise, MP Biomedical's products are for research or further manufacturing use only, not for direct human use. For more information, please contact our customer service department.
UV Visible Absorbance λ max (water): 497 ± 3nm
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