Molekula
Congo Red (CI.22120)
Congo Red (CI.22120) is a synthetic azo dye used in histology for staining connective tissues and in biochemical assays. It is a sodium salt with the molecular formula C32H22N6Na2O6S2 and a molecular weight of 696.66 g/mol. CAS number: 573-58-0. Store at ambient temperature. Hazardous: Signal word Danger. Molekula supplies Congo Red (CI.22120) from research to bulk quantities with full documentation and ISO 9001:2015 traceability.
Overview
Congo Red (CI.22120) is a synthetic azo dye used in histology for staining connective tissues and in biochemical assays. It is a sodium salt with the molecular formula C32H22N6Na2O6S2 and a molecular weight of 696.66 g/mol. CAS number: 573-58-0. Store at ambient temperature. Hazardous: Signal word Danger. Molekula supplies Congo Red (CI.22120) from research to bulk quantities with full documentation and ISO 9001:2015 traceability.
Specifications
| Property | Value |
|---|---|
| Appearance | Red powder |
| Loss on Drying | ≤10% |
| Solubility at 0.1% in water | Clear red solution |
| Wavelenght of max absorption | 495.0 - 503.0nm |
| Specific Absorbance (E 1%/1cm) | ≤500 |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Shelf Life | 24 months |
| Acidity | Neutral |
Identification
| Property | Value |
|---|---|
| CAS Number | 573-58-0 |
| Molecular Formula | C32H22N6Na2O6S2 |
| Molecular Weight | 696.66 |
| REACH Code | Y110 |
| Tariff Code | 3212900000 |
Safety & GHS
-
Explosive
GHS01
-
Flammable
GHS02
Hazard statements
- H319 Causes serious eye irritation
- H350 May cause cancer
- H361d Suspected of damaging fertility. Suspected of damaging the unborn child.
Precautionary statements
- P201 Obtain special instructions before use
- P260 Do not breathe dust/fume/gas/mist/vapours/spray
- P263 Avoid contact during pregnancy/while nursing
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P305+351+338 IF IN EYES: Rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing
- P308+313 IF exposed or concerned: Get medical advice/attention
For research and industrial use only
Documents
Certificate of Analysis (CoA) by batch
Enter a lot or batch number to retrieve the CoA for that specific batch. We can generate one from spec data if no PDF is on file.
Pricing & pack sizes
Synonyms
No alternate names recorded for this product.
Frequently asked questions
What is Congo Red used for?
Congo Red is primarily used as a pH indicator and in dyeing textiles and paper. It is also employed in histology for staining connective tissues.
What is the chemical formula and molecular weight of Congo Red?
The formula is C32H22N6Na2O6S2 with a molecular weight of 696.66 g/mol.
How should Congo Red be stored?
Congo Red should be stored at ambient temperature, protected from light and moisture.
What grade of Congo Red does Molekula supply?
Molekula supplies Congo Red in analytical grade, suitable for laboratory and research use.
Can Molekula supply Congo Red in bulk?
Yes, Molekula can supply Congo Red in bulk quantities—please contact our sales team for pricing and availability.
What documentation comes with a Congo Red order?
Each order includes a Certificate of Analysis (CoA) and Safety Data Sheet (SDS) compliant with GHS standards.
Ready to order or need a custom pack?
Tell us the product, grade, and quantity — Molekula usually responds within one working day with pricing and lead time.