Sulphur Black
Sulfur black is the most important type of sulfur dye and is mainly used for dyeing cellulose fibers
Description
Sulphur Black is the most important category of sulphur dyes, primarily used for cellulose fiber dyeing. It holds a significant position in the global dye market due to its excellent cost-performance ratio and superior dyeing properties.
Product attributes
Chemical Properties:
Chemical Class: Polysulfide condensation product
CAS No. : 1326-82-5
Molecular Formula: C₆H₄N₂O₅Sₓ (x=2-6)
Physical Properties:
Appearance: Dark brown uniform powder or granules
Solubility: Insoluble in water; requires sodium sulfide (Na₂S) reduction to form soluble leuco compound
Storage Stability: Can be stored for over 2 years in dry conditions
Product Details List
Here's a professional parameter table for Sulphur Black in English:
| Parameter | Specification | Test Method |
|---|---|---|
| Chemical Properties | ||
| Chemical Type | Sulfur dye (polysulfide condensation) | - |
| CAS No. | 1326-82-5 | - |
| Molecular Formula | C₆H₄N₂O₅Sₓ (x=2-6) | - |
| Physical Properties | ||
| Appearance | Dark brown to black powder/granules | Visual |
| Particle Size | 80-300 mesh (customizable) | ISO 13320 |
| Bulk Density | 0.6-0.8 g/cm³ | ISO 697 |
| Moisture Content | ≤5% | ISO 662 |
| Dyeing Properties | ||
| Solubility | Reducible by Na₂S to soluble leuco | AATCC 173 |
| Color Strength | 100±3% (vs standard) | Spectrophotometry |
| Exhaustion Rate | 85-92% | ISO 105-Z07 |
| Fastness Properties | ||
| Wash Fastness | 4-5 | ISO 105-C03 |
| Rubbing Fastness | Dry: 4 / Wet: 3 | ISO 105-X12 |
| Light Fastness | 5-6 | ISO 105-B02 |
| Storage & Safety | ||
| Shelf Life | 24 months in dry conditions | - |
| Transport Classification | Non-hazardous (non-DG) | IMDG/IATA |
Notes:
All parameters based on standard powder form (liquid forms have different specs)
Custom specifications available for particle size, strength, and reduction rate
Compliant with REACH, OEKO-TEX® Standard 100
Sulphur Black -- Factory Direct for Superior Dyeing Solutions
Our advantages
Why Global Buyers Choose Us?
Unmatched Cost Advantage
30-40% cheaper than Indian/European suppliers at same quality
Bulk discounts: 5% off for 20MT+ orders
01
Guaranteed Quality Consistency
Batch-to-batch variation <2% (test reports available)
85-92% exhaustion rate reduces wastewater treatment cost
02
Flexible Customization
Particle size: 80-500 mesh adjustable
Liquid dispersion version available (pre-reduced, 30% time-saving)
03
Faster Delivery with Stock
3,000MT monthly capacity + 500MT EU bonded warehouse
15-day lead time for LCL shipments
04
Certifications You Can Trust:
Technical Highlights
Parameter Our Standard Competitor A Test Method
Color Strength 100±2% 95±5% ISO 105-B06
Moisture ≤3% ≤5% ISO 2470
Heavy Metals <10ppm 15-30ppm ICP-MS
Try Risk-Free
1.Free sample with your technical requirements
2.Dyeing process video guide upon request
3.Dedicated English-speaking account manager
4.Limited Offer: First 3 new clients get 5% extra discount + free SDS documentation
FAQ
Q: 1. Are you manufacturer or trading company?
A: we have our own factory to do the production to ensure high quality product with competitive price.
Q: 2. Can you make packing and logo as customer request?
A: Yes we can
Q: 3. What's your MOQ?
A: Usually, our MOQ is 1000kg.
Q: 4. What is your lead time?
A: After the deposit and confirm all the accessory with in 15days.
Q: 5. What's your packing?
A: we can do packing as your require.
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