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HS Code |
915594 |
| Chemical Name | Direct Fast Black VSF |
| Color Index Number | Direct Black 22 |
| Molecular Formula | C44H32N13Na5O17S5 |
| Appearance | Black powder or granules |
| Solubility | Soluble in water |
| Application | Textile dyeing (cotton, viscose, paper) |
| Light Fastness | Good |
| Ph Value | 7-9 (1% aqueous solution) |
| Stability | Stable under normal conditions |
| Cas Number | 6473-13-8 |
| Ionic Nature | Anionic |
As an accredited Direct Fast Black VSF factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Direct Fast Black VSF is packaged in a 25 kg woven bag with double inner linings, clearly labeled for identification and safety. |
| Shipping | Direct Fast Black VSF should be shipped in tightly sealed, clearly labeled containers, protected from moisture and incompatible substances. Handle with care to prevent spills. Storage and transport should comply with local regulations for hazardous chemicals, ensuring adequate ventilation and preventing exposure to heat, sources of ignition, and direct sunlight. |
| Storage | Direct Fast Black VSF should be stored in a cool, dry, and well-ventilated area, away from direct sunlight, moisture, and sources of heat or ignition. Keep the container tightly closed and properly labeled. Avoid contact with oxidizing agents. Use storage containers made of compatible materials to prevent contamination and degradation of the dye. Ensure good housekeeping practices to minimize dust accumulation. |
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Purity 98%: Direct Fast Black VSF with a purity of 98% is used in cotton fabric dyeing, where it ensures uniform color application and high shade consistency. Molecular weight 750 g/mol: Direct Fast Black VSF with a molecular weight of 750 g/mol is used in viscose yarn coloring, where it provides deep penetration and long-lasting fastness. Solubility in water 40 g/L: Direct Fast Black VSF with a solubility of 40 g/L is used in cellulosic fiber printing, where it promotes easy dispersion and minimizes undissolved residue. pH stability 6-8: Direct Fast Black VSF with pH stability from 6 to 8 is used in paper dyeing processes, where it maintains color stability and prevents precipitation during application. Light fastness grade 4: Direct Fast Black VSF with a light fastness grade of 4 is used in textile printing, where it offers moderate resistance to fading under sunlight exposure. Melting point 310°C: Direct Fast Black VSF with a melting point of 310°C is used in industrial textile coloring, where it withstands elevated processing temperatures without degradation. Particle size 20 μm: Direct Fast Black VSF with a particle size of 20 μm is used in pigment dispersion systems, where it enables smooth formulation and prevents clogging in spray equipment. Heat stability 120°C: Direct Fast Black VSF with heat stability up to 120°C is used in paper coating, where it maintains color integrity during thermal drying cycles. Salt tolerance 60 g/L: Direct Fast Black VSF with salt tolerance of 60 g/L is used in textile exhaust dyeing, where it allows optimal dye uptake under high saline conditions. Moisture content <1%: Direct Fast Black VSF with a moisture content of less than 1% is used in powder dye blends, where it ensures improved storage stability and consistent batch performance. |
Competitive Direct Fast Black VSF 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
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