The Congo Red (CI 22120) by Dinâmica, available at LojaLab, is a benzidine-based anionic diazo dye used as a histological stain, research reagent and acid-base indicator. It has a typical visual transition from pH 3.0 to 5.2, changing from violet to orange-red, and shows affinity for selected beta-structured assemblies and polysaccharides. In histology, its best-known use is in amyloid-staining protocols, whose interpretation requires a validated technique and appropriate microscopy assessment.
Characteristics
- Benzidine-based anionic diazo dye
- Colour Index C.I. 22120
- Red-brown powder that forms a red aqueous solution
- Typical indicator range from pH 3.0 to 5.2, violet to orange-red
- Histological stain with affinity for amyloids and selected polysaccharides.
Applications
- Histological protocols for visualization of amyloid deposits
- Studies of protein aggregation and interaction with beta-amyloid structures
- Staining of cell walls, polysaccharides and biological structures in specific methods
- Preparation of indicator solutions and colorimetric assays in the acidic range.
Technical Specifications
- Product: Congo Red (CI 22120)
- Brand: Dinâmica Química
- Grade: Laboratory reagent
- CAS number: 573-58-0
- Colour Index: C.I. 22120
- Chemical formula: C32H22N6Na2O6S2
- Molar mass: 696.66 g/mol
- Available quantity: 25 g.
Technical Data
| Chemical class | Anionic diazo dye |
| Appearance | Red-brown powder |
| Solubility | Soluble in water under common preparation conditions |
| Transition range | PH 3.0 to 5.2 |
| Color change | Violet to orange-red |
| Characteristic application | Histological amyloid staining |
Frequently Asked Questions
What is Congo Red (CI 22120) used for?
The main applications of Congo Red (CI 22120) include histological protocols for visualization of amyloid deposits; studies of protein aggregation and interaction with beta-amyloid structures.
What are the main characteristics of Congo Red (CI 22120)?
The characteristics listed for Congo Red (CI 22120) include Benzidine-based anionic diazo dye; colour Index C.I. 22120.
How should Congo Red (CI 22120) be selected for a laboratory application?
Selection of Congo Red (CI 22120) should consider the grade, presentation, method requirements, and technical specifications described on this page.
What quantities of Congo Red (CI 22120) are available?
Congo Red (CI 22120) is available in 25 g. For other quantities, recurring purchases, or larger requirements, contact the sales team to check availability and request a quotation.
How can companies and institutions purchase Congo Red (CI 22120) and request a formal quotation?
Companies, laboratories, educational institutions, and research organizations can purchase Congo Red (CI 22120) directly from LojaLab. For recurring purchases, internal approval processes, research funding, public procurement, or formal quotation requirements, contact the sales team.
Professional Use and Safety Guidance
This product is intended for professional use in scientific research, laboratory analysis, education, and compatible industrial applications.
Each product has its own handling, storage, and disposal requirements. Before use, consult the corresponding SDS and follow the manufacturer's instructions and the safety procedures adopted by the institution.
LojaLab provides guidance on product selection and provenance; defining the use protocol and verifying suitability for the final application are the responsibility of the purchasing professional or institution.
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