Explore our premium grade products exported globally, designed to match the highest industry benchmarks for stability and sustainability.
Sulphur Black 1 (CAS Registry Number 1326-82-5) remains the most widely consumed synthetic organic dye globally by volume. Indispensable to the modern textile manufacturing sector, this complex polymeric dye constitutes the foundation of denim processing and heavy cotton fabric coloration. The global industrial landscape for Sulphur Black 1 has undergone massive consolidation and upgrade cycles over the past decade, shifting production capacity toward state-of-the-art facilities located primarily in China.
As international supply chains optimize for efficiency and compliance, the role of a certified China Sulphur Black 1 supplier has transitioned from simple material provision to integrated technical partnership. Global demand currently exceeds 150,000 metric tons annually, heavily driven by apparel manufacturing hubs across South Asia, Southeast Asia, and Latin America. Industrial buyers seek high concentration forms—such as the 240% crystal and customized liquid formulations—to reduce logistics costs and simplify dye-house operations.
Industrial performance requirements demand high wash-fastness, deep build-up characteristics, and minimal ecological footprint, forcing traditional factories to upgrade their synthesis pipelines or face regulatory exclusion.
Sulphur Black 1 is synthesized via the thionation (sulfurization) of 2,4-dinitrophenol, typically in the presence of sodium polysulfide. The resulting polymeric structure features complex disulfide bridges and polysulfide links that give the dye its characteristic insoluble nature in water. To make the dye soluble for industrial application, it must undergo reduction, converting the insoluble pigment into a soluble leuco form capable of penetrating cellulosic fibers.
Tianjin Sunrise Chem Group maintains rigorous quality control procedures. Every batch of Sulphur Black 1—whether in dry crystalline granules, powder, or liquid formulation—undergoes spectrophotometric evaluation to check for color strength, shade deviation, solubility limit, and moisture content. The presence of impurities like free sulfur and iron salts is kept to strict minimums, preventing subsequent degradation of the fiber (often referred to as 'acid storage rot') after industrial processing.
In the modern textile market, compliance is not optional. Brands and retailers demand full chemical transparency. At Tianjin Sunrise Chem Group, environmental protection is the cornerstone of our innovation. We prioritize our ecological responsibility, aligning our entire production and management process with global sustainability frameworks.
Our certifications, including **ZDHC (Zero Discharge of Hazardous Chemicals) Level 3** and **GOTS (Global Organic Textile Standard)**, demonstrate our commitment to eliminating hazardous chemical output throughout the supply chain. ZDHC Level 3 is the highest level of conformity in chemical management, ensuring that all our input formulations meet strict safety guidelines and do not contain banned substances. Similarly, our GOTS certification ensures that our dyes are suitable for organic textile processing, ensuring safety for both the worker and the end-consumer.
Our dyes are formulated and verified through third-party audits to meet MRSL (Manufacturing Restricted Substances List) parameters, ensuring that the wastewater discharge from our partner mills contains zero hazardous chemical elements.
Our GOTS-certified dyes support sustainable agriculture and processing. This certification guarantees that organic textiles processed with our colorants remain free from carcinogenic amines and heavy metals.
Sulphur Black 1 is highly versatile and serves multiple applications. From the rugged denim look to the deep shades of formal wear, our formulations adapt to diverse industrial setups:
In warp-yarn dyeing for denim, Sulphur Black 1 is applied continuously via slasher or rope dyeing ranges. Controlling the oxidation-reduction potential (ORP) is critical to maintaining uniform shade depth. The dye is reduced using sodium hydrosulfite or alternative eco-friendly reducing agents, allowing it to penetrate the cellulose fiber before being oxidized back to its insoluble pigment state, locking in the color.
For cotton yarn and knitted fabrics, exhaust dyeing methods using jet or package dyeing machines are employed. Electrolyte additions (sodium chloride or sodium sulfate) are introduced to drive the dye exhaustion onto the cotton substrate. Temperature controls (usually maintaining 80°C to 90°C) ensure optimal diffusion and leveling, preventing surface unevenness.
Beyond traditional textiles, Sulphur Black 1 has a long track record in the paper and leather sectors. For paper manufacturing, liquid and highly soluble powder options are preferred to color structural board, packaging materials, and specialty paper stocks. In the leather processing sector, its high affinity for protein fibers ensures deep black coloration on footwear, garments, and upholstery leathers, showing excellent resistance to light fading and rub-off.
The technical roadmap for Sulphur Black 1 centers on ecological preservation and processing efficiency. Historically, the reduction of Sulphur Black required large amounts of sodium sulfide, which produces hydrogen sulfide in wastewater, requiring extensive effluent treatment. The industry is now transitioning to cleaner reduction technologies:
Utilizing organic reducing agents like glucose and hydroxyacetone to eliminate sodium sulfide entirely, creating a sulfur-free wastewater process.
Pre-reduced liquid Sulphur Black 1 reduces dye-house preparation times, dust hazards, and chemical usage, improving overall worker safety.
Transitioning from traditional hydrogen peroxide or sodium dichromate oxidation methods to mild hydrogen peroxide systems, avoiding hazardous metal residues.
A glimpse into our production, packaging, and logistics capacity that ensures secure supply lines for our international partners.
Cooperating with textile and paper mills for many years shows that the factory has established a strong and reliable business relationship. This kind of long-term collaboration brings numerous benefits, such as consistent orders, shared resources, and mutual support. It indicates that the factory has a good track record of delivering quality products and meeting the needs of its partners. Our mission is to drive business growth by providing reliable and customized products. Our goal is to make a significant contribution to our customers' success by consistently delivering first-class products and exceptional customer service. By building lasting partnerships, we strive to be a catalyst for our clients' success.
With years of experience, we have successfully established strong partnerships in many countries. Our dedication to meeting global demands and exceeding customer expectations has earned us a reputation as a reliable supplier worldwide. If you are looking for reliable, high-quality Dyes, we invite you to choose us as your trusted partner.
One of the main reasons why customers choose us is the stable supply of dyes we provide. We have developed efficient manufacturing processes to ensure a continuous supply of our products. Our factories feature state-of-the-art equipment and a knowledgeable workforce, which enables us to fulfill the most demanding orders. With us, you can begin your manufacturing journey with confidence knowing that dye availability will never be an issue.
Apart from a steady supply, the quality of our dyes is another reason why we stand out in the market. We, SUNRISE CHEM, take pride in our commitment to producing dyes that consistently meet high standards of quality. Our experienced technicians carefully monitor the manufacturing process, ensuring that each batch of dyes is carefully tested for color fastness, durability, and other essential parameters. By choosing us, you can rest assured that your products will stand out in the market due to the vibrant and long-lasting color our dyes provide.
Answering key technical and logistical questions for global buyers, chemical engineers, and dye-house managers.
Sulphur Black BR is the commercial product name used in Asia and parts of Europe, while Sulphur Black 1 is the Color Index (C.I.) classification. They refer to the same chemical structure synthesized from 2,4-dinitrophenol, but varying commercial grades may have different concentrations (like 200% or 240%) and physical forms (crystals or powder).
ZDHC Level 3 certification guarantees that our dyestuffs do not contain hazardous chemical impurities listed on the Manufacturing Restricted Substances List (MRSL). This allows textile mills to meet environmental standards, pass compliance audits, and supply premium fashion brands without risk of chemical contamination.
Sulphur Black 1 should be stored in cool, dry, well-ventilated warehouses away from oxidizing agents and strong acids. Under dry and airtight conditions, crystalline Sulphur Black 1 has a shelf life of up to 3 years. Exposure to moisture and air over long periods can cause slow oxidation, which reduces solubility and strength.
Yes. Liquid Sulphur Black is a pre-reduced leuco dye formulation. It eliminates the dust hazards associated with crystalline powder, reduces the need for sodium sulfide reducing agents at the dye-house, and provides highly consistent coloring results on continuous denim dye lines.
Our proximity to major ports like Tianjin Port allows us to secure quick shipping slots, optimize container loading efficiency, and guarantee short lead times. We handle various bulk packaging requirements including iron drums, woven bags, and customized cartons, ensuring safe transport across overland and maritime routes.
Through our dedicated customer support team and network of global agents, we offer real-time tracking, customs clearance support, and direct assistance for dye-house trials to ensure smooth implementation in your local factories.
We firmly believe in building relationships with our clients based on trust and mutual benefit. We know that our customers' success is our success, so we are committed to providing quality services to meet their needs. Our dedicated customer support team is on hand to address any questions or concerns you may have. We value your feedback and strive to continuously improve our operations to serve you better. Our purpose is not just to supply dyes, but to be your trusted partner in achieving your business goals. By choosing us, you choose a partnership built on reliability, transparency, and mutual success.
In a word, when choosing a dye factory with stable supply, high quality, and excellent service, we are your best choice. With our attractive range of dyestuffs, coupled with our professional and customer-centric approach, we assure you that your decision to choose us as your preferred dyestuff factory will be a fruitful one. Contact us today and let's embark on a journey to success together.
Browse our diverse selection of industrial chemicals, pigments, and water-soluble dyes matching high international standards.
Sunrise
