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HS Code |
462417 |
| Product Name | Direct Black VSF |
| Cas Number | 6473-13-8 |
| Chemical Family | Azo dye |
| Appearance | Black powder |
| Solubility | Soluble in water |
| Molecular Formula | C34H24N8Na2O10S2 |
| Molecular Weight | 822.71 g/mol |
| Application | Textile dyeing |
| Dye Class | Direct dye |
| Light Fastness | Moderate |
| Ph Stability | Stable in neutral and slightly alkaline conditions |
| Color Index Number | Direct Black 38 |
| Main Usage Fiber | Cellulosic fibers (like cotton) |
| Shade | Black with bluish undertone |
| Toxicity | Harmful if swallowed |
As an accredited Direct Black VSF factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Direct Black VSF is typically packaged in 25 kg woven polypropylene bags with inner plastic lining for moisture protection and safe transport. |
| Shipping | Direct Black VSF is shipped in tightly sealed, moisture-proof bags or fiber drums, typically weighing 25 kg each. The packaging ensures protection from humidity, heat, and direct sunlight. During transportation, it should be handled as a non-hazardous chemical, avoiding contact with foodstuffs and complying with local and international shipping regulations. |
| Storage | Direct Black VSF should be stored in a cool, dry, and well-ventilated area, away from heat sources and direct sunlight. Keep the container tightly sealed and avoid contact with moisture. Store separately from incompatible materials such as oxidizing agents. Ensure good labeling and secure storage to prevent spillage or accidental usage. Handle with appropriate personal protective equipment when transferring or using. |
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Purity 98%: Direct Black VSF with a purity of 98% is used in cotton fiber dyeing, where it offers deep and uniform black shades. Particle Size 60 µm: Direct Black VSF with particle size 60 µm is used in printing paste formulations, where it ensures smooth dispersion and consistent color intensity. Moisture Content ≤4%: Direct Black VSF with moisture content below 4% is used in dry blending for pigment preparations, where it enhances shelf stability and prevents clumping. pH 6.5-7.5: Direct Black VSF with a pH of 6.5 to 7.5 is used in textile exhaust dyeing processes, where it maintains optimal dye-fiber interaction. Shade Strength 100%: Direct Black VSF at shade strength 100% is used in viscose rayon coloring, where it creates bold and lasting black coloration. Water Solubility ≥95%: Direct Black VSF with water solubility of at least 95% is used in liquid dye formulations, where it achieves rapid and homogeneous dissolution. Stability Temperature 120°C: Direct Black VSF stable up to 120°C is used in high-temperature dyeing, where it resists thermal degradation and color shift. Conductivity ≤200 µS/cm: Direct Black VSF with conductivity ≤200 µS/cm is used in microfilament polyester dyeing, where it minimizes interference with electronic finishing processes. Light Fastness Grade 4: Direct Black VSF with light fastness grade 4 is used in curtain fabric dyeing, where it ensures moderate fading resistance under light exposure. Salt Resistance 30 g/L: Direct Black VSF with salt resistance up to 30 g/L is used in batch dyeing applications, where it maintains color yield in brine-rich conditions. |
Competitive Direct 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
Flexible payment, competitive price, premium service - Inquire now!
