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Premium Sulphur Black Dye | Eco-Friendly & Durable

Sulphur Black is one of the most widely used black dyes worldwide, renowned for its robust chemical properties and cost-efficiency in textile coloration, paper, leather, and a growing range of technical applications. Sulphur Black is fundamental not only in the realm of cotton dyeing but also in emerging advanced material sectors thanks to its impressive color depth, environmental adaptability, and reliable performance under industrial processes.
Market Size (2023):
$850M+ CAGR (2022-2028):
4.6% Main Use:
Textiles & Technical Yarns Top Producer:
China >65% share Eco-compliance Rate:
95% (ISO 14001)

Driven by both sustainability initiatives and ongoing technological enhancements, Sulphur Black remains essential in global textile and industrial coloration value chains. The global Sulphur Black market exceeded $850 million annually in 2023 (source: Statista), with robust demand across Asia-Pacific, particularly led by China's integrated dye manufacturing clusters. Digitization of process controls, tighter ISO and OEKO-TEX environmental compliance, and customization according to end-user requirements have driven notable upgrades in Sulphur Black quality, reproducibility, and eco-friendliness.

Premium Sulphur Black Dye | Eco-Friendly & Durable
Figure: Factory-produced Sulphur Black powder - Appearance & Quality Benchmarks

The demand for eco-compliant Sulphur Black has accelerated, with over 82% of textile enterprises now specifying GOTS/ISO 14001-grade products.
Additionally, technical sectors such as synthetic fiber, automotive textiles, battery casing pigments, and conductive composites are increasingly using optimized Sulphur Black formulations.

Sulphur Black Manufacturing Process—Detailed Flow & Craftsmanship

In-Depth Technology: The modern process of Sulphur Black production leverages precise stoichiometry, controlled reactor atmospheres, and multi-stage purification for reliable output, minimal waste, and reproducibility.
Sulphur Black Manufacturing Flowchart
Nitrobenzene
Sodium Sulfide
Sulphonation
(135°C–150°C)
Polymerization
+ Oxidation
Precipitation/Filtration
Drying
→ Milling
Final QC
Packing
Key process controls: reactor temperature & pH, feed rate consistency, microscale impurity removal, ISO 9001-verified testing, end-to-end batch traceability.

Typically, Sulphur Black is manufactured via the reaction of aromatic amines (like nitrobenzene) with sodium polysulfide under controlled temperature and pH conditions, followed by wet oxidation and sophisticated filtration technology. Final grinding and homogenization steps are critical to ensuring consistent strength and dispersion. All steps are carried out under rigorous ISO 9001, 14001 and OEKO-TEX environmental controls.

Material Specifications, Craft Process & Industry Standards

Premium Sulphur Black Dye | Eco-Friendly & Durable
Table: Sulphur Black in granular and dust-free micro-powder form, suitable for automated feeding and clean production
  • Appearance: Black microcrystalline powder or granule, minimal odour, low dust (less than 2 mg/m3 airborne).
  • CAS No.: 1326-82-5   Molecular Formula: C6H4NNaO2Sx
  • Tinting Strength (Relative to Standard): ≥100%
  • Solubility: Insoluble in water; soluble in reducing alkaline solutions
  • Heat Stability: ≥170°C (ISO 105-C06)
  • Light Fastness: 6–7 (ISO 105-B02)
  • Washing Fastness: ≥4 (ISO 105-C06)
  • Recommended Application pH: 10.5–12.4
  • Standard Packaging: 25kg fiber drum / 25kg PP bag
  • Certifications: ISO 9001, 14001, OEKO-TEX Eco-Passport
Sulphur Black – Major Technical Parameter Comparison Table
Property Sulphur Black 1 Sulphur Black BR Sulphur Black MD
Color Index No. CI 53185 CI 53185 CI 53185
Tinting Strength (%) 100–105 96–99 90–95
Light Fastness (ISO 105-B02) 6–7 6 5–6
Washing Fastness (ISO 105-C06) ≥4 ≥4 3–4
Heat Resistance (°C) 175+ 170 160
Recommended For OEKO-TEX, High-end denim, Technical textiles Mass-market, Workwear General use
Compliance ISO 9001/14001
GOTS, ZDHC, REACH		 ISO 9001 Basic
Sulphur Black 1 is the most advanced, with exceptional color depth, fastness, and eco-certification for demanding clients.
Sulphur Black BR offers balance for cost/fastness, while Sulphur Black MD remains for price-sensitive, less-demanding sectors. Choose accordingly.
Technology Indicators: Sulphur Black vs. Common Black Dyes (Bar Chart)

Application Scenarios: Sulphur Black's Technical Advantages

Premium Sulphur Black Dye | Eco-Friendly & Durable
Figure: Sulphur Black applied in technical textiles & industrial webbing for high fastness and anti-corrosion
  • Textile Industry: Cellulose fiber dyeing (cotton, viscose), denim, workwear, yarns. Key for strong black shades, anti-bleeding, and high wash durability.
  • Technical Fabrics: Geo-textiles, automotive carpeting, industrial belts/cords, due to excellent resistance to light, heat, and alkaline conditions.
  • Paper & Packaging: Black paperboard, carbonless copy paper, carton industry for intense coloration and print-compatibility.
  • Plastics & Composites: Low-dust microgranular forms as pigment for PE/PP casings, battery shells, and anti-static parts.
  • Water Treatment Industry: Sulphur Black’s chemical inertness and low solubility allow use in filter media, pipe coatings, pump castings.
  • Metal Coating & Anti-Corrosion: Used in pre-treatment of cast iron, steel rebars, metal tanks — forms a passivating black oxide film for corrosion resistance.
Sulphur Black's primary advantage is its cost effectiveness, wide process latitude, and robust environmental compliance (95% of exports meet ISO 14001 or ZDHC MRSL).

Manufacturer Comparison: Market Leaders & Customization Options

Leading Sulphur Black Manufacturers Comparison Table (2024)
Company Production Volume (TPA) ECO Compliance Certifications Customizable Parameters Service Markets
Wuxin Group
Product Link		 >32,000 ISO 14001,
Eco Passport		 ISO 9001, GOTS, OEKO-TEX Strength, Granulation, pH, Free Alkali, Dust-proof Textile, Tech, Paper, Water
Lonkey Chemical 21,800 ISO 14001 ISO 9001 Standard Textile, Denims
Meghmani Organics 16,400 ZDHC, REACH ISO 9001, 14001 Strength, Bulk Textile, Plastics
Atul Ltd. 12,500 Basic ISO 9001 Standard General textile
Wuxin Group stands out for volume, certification, QC, and customized Sulphur Black batches tailored for advanced industrial needs.
Sulphur Black – Global Application Market Shares (2023, Pie Chart)
Sulphur Black – Key Quality Trends (2018–2023, Line Chart)

Custom Solutions in Sulphur Black—Process, Lead Time, Warranty

  • Customized Formulation: Fine-tune strength (100-105%), dust-free grade, bulk density, particle size (down to 60μm), and anti-dust agent per requirement.
  • Certified Technical Support: Color-matching, process guidance, test dyeing, and on-site application support—led by ISO 17025-certified lab.
  • Industrial Compliance: Fully traceable, batch-level COA/SGS test, ZDHC/MRSL/RSL.
    Wuxin Group offers special grades for battery shells, automotive, and water pipe line sectors.
  • Delivery Cycle: Stock items: 2–5 days (EXW), Custom R&D: avg. 13–28 days
  • Warranty & After-sales: 24–36 months shelf-life. Product quality warranty; dedicated technical hotline (48h response policy).
Direct Sulphur Black Solution Inquiry available on our Wuxin Group portal.

Sulphur Black Application Cases & Real Customer Feedback

Case 1 – Technical Textile: A Japanese geotextile manufacturer switched to Wuxin Sulphur Black 1 (GOTS/ISO14001 grade) for post-bake yarns. Outcome: achieved light fastness of 7 (ISO105-B02), slashed rejects by 60%, and eco-audits passed on first trial.
Case 2 – Pump/Valve Manufacturer (Germany): Applied dust-free microgranular Sulphur Black as pigment for industrial PE valve housings, resulting in anti-corrosive film life extension of 28%+, zero batch failures over 2 years, confirmed via TUV testing.
Case 3 – Global Denim Mill: Customer feedback: “Switching to high-strength Sulphur Black improved shade reproducibility, reduced water use by 18% thanks to superior fixation, and all loads certified OEKO-TEX and ZDHC-compliant.”
“Compared to ordinary black dyes, Sulphur Black provides long-term durability and lower operating costs in large scale dyeing.” (Independent textile plant technical manager, forum interview, 2023)

FAQ: Sulphur Black Technical Terms & Application

Q1: What is the main chemical composition of Sulphur Black?
A: Sulphur Black is mainly a polymeric condensation product of aromatic amines (often nitrobenzene) and sodium polysulfide, with a unique molecular structure that imparts insolubility and extreme color depth.
Q2: What granulation types are offered for Sulphur Black?
A: Both standard fine powder (85–150 μm) and microgranular (dust-free, 45–80 μm) are available. Granules are recommended for automated feeding and reduced workplace dust.
Q3: What installation or application standards apply?
A: Process standards include ISO 105 (for color fastness testing), OEKO-TEX MRSL, ZDHC, and internal protocols; finished products are tested under ASTM or EN textile standards.
Q4: Which performance parameters are most critical when selecting Sulphur Black?
A: Main criteria: relative strength (compared to standard), dispersion, dust level, heavy metal content (<5ppm), and eco-compliance as per GOTS/ISO.
Q5: How is Sulphur Black tested for quality control?
A: Each batch is checked for strength using standard dyeing methods (ISO 105-A03), filtration for impurities, free alkali/acid titration, and advanced spectrophotometers for shade control.
Q6: What are typical shelf life and storage recommendations?
A: When stored in sealed, dry, and cool conditions, Sulphur Black powders/granules retain full properties 24–36 months. Avoid long exposure to air/moisture.
Q7: What after-sales and customer support options are provided?
A: Leading manufacturers provide COA reports, application troubleshooting, periodic QC audits, and 48-hr technical response for all industrial clients (ISO 9001 service compliant).

Conclusion: The Future of Sulphur Black & Authoritative Recommendations

With ongoing upgrades in process control, environmental compliance, and customization capability, Sulphur Black will remain a pillar of sustainable, cost-effective coloring technology across global industries. For advanced technical uses (e.g. anti-corrosion coatings, advanced textiles, plastic pigmenting), choosing a certified and customized Sulphur Black supplier delivers best-in-class durability, cost, and certification.

References & Further Reading
  1. Textile Dyeing with Sulphur Dyes. Textile World, 2023. textileworld.com
  2. Global Sulphur Black Industry Overview (2023). Statista Research: statista.com
  3. Sulphur Black Quality Management Guidelines. OEKO-TEX® STANDARD 100 Technical Documents. oeko-tex.com
  4. Dye Application in Composites. Chemical Forums (2023): chemicalforums.com
  5. International Journal of Textile Science:
    “Performance and Application Advances of Sulphur Black” (2023), sciencepublishinggroup.com/journal/index?journalid=122
  6. Technical FAQ, textileforum.org
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