Reactive Black 5 dyes are high-performance textile dyes widely used for dyeing cotton and other cellulosic fibers. Known for their deep jet-black shade, excellent wash fastness, and high fixation properties, these dyes are essential in textile processing industries.
Reactive Black 5 dyes form a strong covalent bond with fibers, ensuring long-lasting color and resistance to washing and light exposure. They are suitable for both exhaust and continuous dyeing processes.
We are manufacturers of Reactive Black 5 dye from India with consistent quality for export markets including USA, Europe, and the Middle East.
General Specifications
| Parameter | Specification | Result |
|---|---|---|
| Appearance / Shade | Dark black / bluish-black fine powder | Dark black powder |
| Dye Content / Strength | 100% – 150% (standardized) | 100% |
| Maximum Absorption (λ max) | ~597 nm | 597 nm |
| Solubility in Water | ≥ 100 g/L (20°C) | Pass |
| pH (1% Solution) | 5.5 – 7.0 | 6.2 |
| Moisture Content | ≤ 5.0% | 2.8% |
| Insoluble Matter | ≤ 0.5% | 0.3% |
| Light Fastness | Min 4 (1–8 scale) | 4 |
| Washing Fastness | 4 – 5 | 4–5 |
| Rubbing Fastness (Wet / Dry) | Wet: 2–3 / Dry: 4 | Conforms |
| Perspiration Fastness | 4 – 5 | 4–5 |
Notes: * For more detailed specification and technical data please Contact Us.
Technical Specifications
- Product Name: Reactive Black 5
- C.I. Name: Reactive Black 5
- C.I. Number: 20505
- CAS Number: 17095-24-8
- Chemical Class: Bis-azo (Vinyl Sulfone Reactive Dye)
- Molecular Formula: C₂₆H₂₅N₅Na₄O₁₉S₆
- Molecular Weight: 991.82 g/mol
Available Grades
- Reactive Black 5 (RB5) – Industry standard, deep black shade
- Reactive Black 8 (RB8) – Good leveling and uniform dyeing
- Reactive Black 31 (RB31) – High fixation efficiency
- Reactive Black 39 (RB39) – Rich tone and reproducibility
- Reactive Black NN / N / B Series – Customized grades
Applications
- Textile Dyeing (Cotton & Viscose)
- Garment Processing
- Fabric Printing
- Denim Industry
Packaging Details
- 25 KG HDPE Drums / Bags with inner liner
- Customized packaging available
Storage Conditions
- Store in tightly closed containers
- Keep in a cool, dry, ventilated area
- Protect from moisture and sunlight
Handling Conditions
- Avoid inhalation of dust
- Avoid contact with skin and eyes
- Use proper PPE
Why Choose Us
- Reliable Reactive Black 5 Dye Manufacturers from India
- Bulk Export Capability
- Consistent Quality Batch to Batch
- COA / TDS / MSDS Available
- Competitive Pricing
FAQs
What are the most commonly used Reactive Black dyes?
The most widely used grades include Reactive Black 5, 8, 31, and 39, known for their deep shade and strong fastness properties.
Which Reactive Black dye is best for cotton?
Reactive Black 5 (RB5) is the most preferred due to its excellent fixation and deep color yield.
Do you supply Reactive Black dyes in bulk?
Yes, we provide bulk supply with export-grade packaging and consistent quality.
What industries use Reactive Black dyes?
Reactive Black dyes are mainly used in textile, garment, and fabric processing industries.
Which Reactive Black dye is suitable for uniform dyeing?
Reactive Black 8 (RB8) offers better leveling properties, making it ideal for achieving uniform dyeing results in fabrics.
Which grade is preferred for high fixation and cost efficiency?
Reactive Black 31 (RB31) is preferred where higher fixation rates and better dye utilization are required, reducing overall dye consumption.
Which Reactive Black grade gives the deepest black shade?
Reactive Black 5 (RB5) and Reactive Black 39 (RB39) are known for producing rich, deep black tones suitable for premium textile applications.
Which grade is best for continuous or bulk dyeing processes?
Reactive Black 31 (RB31) and RB5 perform well in continuous and large-scale dyeing operations due to their stability and consistency.
Are there customized Reactive Black grades available?
Yes, NN, N, and B series grades are available with different strengths and shade variations depending on application requirements.
Which Reactive Black dye is suitable for denim processing?
Reactive Black 5 (RB5) is widely used in denim and garment dyeing due to its strong color yield and durability.
Which grade is best for textile printing applications?
Reactive Black 8 (RB8) and customized grades are often used for printing due to better dispersion and consistency.
