Congo Red
Congo Red (CAS 573-58-0), a direct azo dye with the molecular formula C32H22N6Na2O6S2 and a molecular weight of 696.66 g/mol, is a vital laboratory reagent and biological stain. It is a key component in various histological and cell biology applications, particularly for the visualisation of amyloid deposits and connective tissues. This JIS special grade dye offers reliable performance for scientific and diagnostic purposes, supplied by TSS with meticulous attention to quality.
- IUPAC
- Congo Red 4B,Cosmos Red,Cotton Red B,Cotton Red C,Direct Red 28,Direct Red R,Direct Red Y
- Synonyms
- Direct Red 28Direct Red RDirect Red YCongo Red 4BCosmos RedCotton Red BCotton Red C
Histological Staining
Congo Red is extensively used in histology for the differential staining of amyloid deposits in tissues, aiding in the diagnosis of amyloidosis. It effectively stains amyloid fibrils a characteristic pink to red colour, facilitating their identification under microscopy.
Cell Biology Research
In cell biology, Congo Red serves as a vital stain for observing cellular structures and processes. Its ability to bind with specific cellular components makes it useful for studies involving cell wall synthesis in plants and microorganisms, and for detecting certain polysaccharides.
Diagnostic Aid
This stain acts as an important diagnostic tool in pathology laboratories. By highlighting pathological protein aggregates like amyloid, it supports the accurate diagnosis of various diseases, contributing to effective patient management and treatment strategies.
| Molecular weight | 696.66 |
|---|---|
| Empirical formula | C32H22N6Na2O6S2 |
| Grade | JIS special grade |
| Solubility | H2O: soluble10 mg/mL |
| Melting point | >360 °C(lit.) |
Hazard statements
- H350May cause cancer
- H361D
Precautionary statements
- P201Obtain special instructions before use
- P281Use personal protective equipment as required
- P308IF exposed or concerned
| Protective equipment | Eyeshields, Gloves, type P2 (EN 143) respirator cartridges |
|---|---|
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | T |
| Risk statements (R) | 45-63 |
| Safety statements (S) | 53-45 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
| Colour Index Number | 22120 |
|---|---|
| Availability | available only in Japan |
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is Congo Red used for?
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Congo Red is primarily used as a histological stain for detecting amyloid deposits and in cell biology research for visualising specific cellular structures and processes, such as polysaccharide synthesis.
What are the CAS number and formula for Congo Red?
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The CAS number for Congo Red is 573-58-0, and its empirical formula is C32H22N6Na2O6S2.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Congo Red in a JIS special grade. The specific purity or assay is not detailed, and TSS does not represent this product as meeting USP, BP, or EP pharmacopoeia standards.
What are the safety and handling precautions for Congo Red?
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Congo Red is classified with a GHS08 symbol, indicating danger. It carries hazard statements H350 (May cause cancer) and H361d (Suspected of damaging the unborn child). Handling requires appropriate personal protective equipment, including eyeshields, gloves, and a P2 respirator cartridge, and should be performed with caution according to precautionary statements P201, P281, and P308 + P313.
Is Congo Red available for export?
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Congo Red is available only in Japan domestically. Tech Serve Solutions can discuss export options for international customers.
How can I request a quote or sample for Congo Red?
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To request a quote or sample for Congo Red, please contact our sales team via the website or direct inquiry. We will promptly assist with your requirements.
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