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HS Code |
566130 |
| Productname | Direct Congo Red 4B |
| Casnumber | 573-58-0 |
| Chemicalclass | Azo dye |
| Molecularformula | C32H22N6Na2O6S2 |
| Molecularweight | 696.66 g/mol |
| Appearance | Red powder |
| Solubility | Soluble in water |
| Colorindexnumber | 22120 |
| Maximumabsorptionwavelength | 498 nm |
| Phrange | 5-7 |
| Usage | Textile, paper and biological staining |
| Meltingpoint | Decomposes |
| Stability | Stable under normal conditions |
As an accredited Direct Congo Red 4B factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Direct Congo Red 4B is packaged in a 25 kg net weight fiber drum, featuring moisture-resistant lining and clearly labeled hazard warnings. |
| Shipping | Direct Congo Red 4B is shipped in sealed, moisture-proof containers, clearly labeled with hazard and handling information. It must be transported according to local, national, and international chemical safety regulations, avoiding exposure to moisture, heat, and incompatible substances. Ensure appropriate documentation, including safety data sheets, accompanies the shipment for safe handling and compliance. |
| Storage | Direct Congo Red 4B should be stored in a tightly sealed container in a cool, dry, well-ventilated area, away from direct sunlight, heat, and incompatible materials such as strong oxidizers. Proper labeling is essential to avoid confusion. Personal protective equipment (PPE) should be used when handling, and storage areas should be equipped with appropriate spill containment and cleanup materials. |
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Purity 98%: Direct Congo Red 4B with 98% purity is used in textile dyeing, where it ensures vibrant and uniform color development on cotton fabrics. Molecular weight 696.66 g/mol: Direct Congo Red 4B of molecular weight 696.66 g/mol is used in paper staining, where it facilitates precise and strong color identification in laboratory applications. pH stability 4–8: Direct Congo Red 4B with pH stability range of 4–8 is used in biological staining, where it maintains consistent dye performance in various buffer solutions. Particle size ≤20 µm: Direct Congo Red 4B of ≤20 µm particle size is used in ink formulation, where it provides smooth dispersion and reduces clogging in printing systems. Light fastness grade 4: Direct Congo Red 4B with light fastness grade 4 is used in decorative textile printing, where it offers moderate resistance to fading under light exposure. Water solubility 50 g/L (at 25°C): Direct Congo Red 4B with water solubility of 50 g/L at 25°C is used in aqueous dye baths, where it enables high concentration usage and efficient dye uptake. Thermal stability up to 120°C: Direct Congo Red 4B stable up to 120°C is used in high-temperature dyeing processes, where it retains color intensity without degradation. Melting point 360°C (decomposition): Direct Congo Red 4B with a melting point of 360°C (decomposition) is used in chemical indicator formulations, where it assures reliable performance at elevated temperatures. |
Competitive Direct Congo Red 4B prices that fit your budget—flexible terms and customized quotes for every order.
For samples, pricing, or more information, please contact us at +8615651039172 or mail to sales9@bouling-chem.com.
We will respond to you as soon as possible.
Tel: +8615651039172
Email: sales9@bouling-chem.com
Flexible payment, competitive price, premium service - Inquire now!
