Acid Brown dyes are a group of water-soluble anionic dyes widely used for dyeing wool, silk, nylon, and leather. These dyes provide rich brown shades with excellent leveling, brightness, and fastness properties, making them ideal for textile and leather industries.
We are a trusted Acid Brown dye manufacturers, supplier, and exporter in India, offering a wide range of high-quality grades suitable for industrial applications.
General Specification
| Parameter | Specification | Result |
|---|---|---|
| Appearance / Shade | Brown Powder | Brown Powder |
| Solubility | Soluble in Water | Soluble |
| Dye Content | ≥ 90% | 91% |
| Moisture Content | ≤ 10% | 6.8% |
| Water Insoluble | ≤ 0.5% | 0.2% |
| pH (1% Solution) | 4.5 – 7.0 | 5.8 |
| Light Fastness | 4 – 6 (Wool Scale) | 5 |
| Wash Fastness | 3 – 5 | 4 |
| Rubbing Fastness | 3 – 4 | 3–4 |
| Perspiration Fastness | 3 – 5 | 4 |
| Heavy Metals | ≤ 50 ppm | 25 ppm |
| Lead Content | ≤ 10 ppm | 4 ppm |
| Arsenic Content | ≤ 3 ppm | 1 ppm |
Notes: * For more detailed specification and technical data please Contact Us.
Technical Specification
- Product Name : Acid Brown 14
- C.I. Name : Acid Brown 14
- C.I. Number : 20195
- CAS Number : 5850-16-8
- Chemical Class : Azo Dye
- Molecular Formula : C21H14N4Na2O7S2 (typical representation)
- Molecular Weight : ~536.51 g/mol (approximate, may vary by salt form)
Available Grades
- Acid Brown 14 → Textile applications
- Acid Brown 19 → Leather dyeing
- Acid Brown 24 → General-purpose dye
- Acid Brown 83 → Deep brown shades
- Acid Brown 100 → High-performance dyeing
- Acid Brown 213 → Industrial applications
Key Features
- Rich brown to dark brown shades
- Excellent affinity for protein fibers
- Good leveling and penetration
- High solubility in water
- Good fastness to washing and light (grade dependent)
- Suitable for textile and leather processing
Applications
Acid Brown dyes are widely used in:
- Wool dyeing
- Silk dyeing
- Nylon and polyamide fibers
- Leather dyeing and finishing
- Carpet and textile industries
Packaging Options
- 25 kg HDPE Drums with Inner Poly Liner
- Fiber drums
- Export-grade packaging
- Customized packing solutions
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 Acid Brown Dye manufacturers and exporter
- Consistent product quality
- Wide range of Acid Brown grades
- Competitive pricing
- Bulk supply capability
- Global export support
FAQs
What is Acid Brown dye used for?
Acid Brown dyes are mainly used for:
- Wool dyeing
- Silk processing
- Nylon fabrics
- Leather coloring
- Paper industries
What is the difference between Acid Brown grades?
Each grade differs in:
- Shade tone (reddish, yellowish, neutral brown)
- Fastness properties
- Molecular structure
- End-use suitability
What is light fastness of Acid Brown?
- Typically ranges from 3 to 6 (on blue wool scale 1–8)
- Depends on specific grade
What is wash fastness?
- Usually 3 to 5 (on grey scale)
- Better on protein fibers like wool
Are Acid Brown dyes water soluble?
Yes — they are fully water soluble and form clear dye solutions.
Can Acid Brown be used for cotton?
❌ Not recommended
👉 Acid dyes have poor affinity for cellulose fibers like cotton
What is the pH requirement for dyeing?
- Optimal dyeing occurs at pH 4 – 6
- Acidic conditions improve fixation
Are these dyes eco-friendly?
- Most grades comply with REACH / ZDHC
- Heavy metal-controlled variants are available
What industries commonly use Acid Brown?
- Textile mills
- Leather processing units
- Carpet manufacturers
- Paper coloring plants
How is shade consistency maintained?
Through:
- Controlled batch manufacturing
- Spectrophotometer matching
- Standardized dye strength
