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Congo Red
Key Features and Details
Congo Red
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: #
573-58-0
MOLECULAR FORMULA: C32H22N6Na2O6S2
MOLECULAR WEIGHT: 696.664 g/mol
BEILSTEIN REGISTRY No.: 3894858
EC No: 209-358-4
MDL No: MFCD00004028
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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
Base Catalog Number: 105099
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
Beilstein Registration No
: 3894858
CAS
: #
573-58-0
Color Index
: 22120
EC No
: 209-358-4
Format
: Powder
Hazard Statements
: H350-H361d
MDL No
: MFCD00004028
Melting Point
: >360 deg C
Molecular Formula
: C32H22N6Na2O6S2
Molecular Weight
: 696.664 g/mol
pH
: SOLN HAVE PH OF 8-9.5
PPE
: Eyeshields, full-face particle respirator, Gloves, respirator cartridge, respirator filter
RTECS No
: QK1400000
Safety Symbol
: GHS08
UV Visible Absorbance
: ? max (water): 497 ± 3nm
