High-purity chemical dyes manufactured under rigorous QA/QC standards for global supply chains.
Direct Red 31 (commonly classified under chemical structures including azo linkages) represents a key anionic dyestuff heavily utilized across global manufacturing hubs. Known for its strong affinity to cellulosic materials, this compound is vital in the high-volume coloring of cotton, viscose, paper, and natural leather. The global market value of direct dyes continues to grow, driven by demands from the developing economies of South Asia, Southeast Asia, and Latin America.
In comparison to complex reactive dye options, Direct Red 31 offers a simplified, energy-efficient application protocol. By eliminating the necessity for complex chemical cross-linking agents and high-temperature fixation stages, mills can achieve significant energy savings. Sourcing from recognized, direct-from-factory manufacturers guarantees the batch consistency, purity, and environmental compliance necessary to meet international standards.
Understanding the physical-chemical properties of Direct Red 31 is critical for optimizing exhaust rates and fixing performance. The dye molecule contains azo chromophore bands which align effectively with cellulose chains through hydrogen bonding and Van der Waals forces. Because of these intermolecular forces, Direct Red 31 requires no external mordants or covalent bonding agents to anchor to natural plant fibers.
| Property Parameter | Value / Standard | Industrial Advantage |
|---|---|---|
| Chemical Structure | Azo Dyestuff Group | High color strength and excellent yield values |
| Solubility in Water | ≥ 30 g/L (at 80°C) | Prevents aggregation in hard water conditions |
| Wash Fastness | Grade 3-4 (with after-treatment) | Durable against repeated industrial washes |
| Light Fastness | Grade 4 (Blue Wool Scale) | Maintains integrity under UV and daylight exposure |
| Optimal pH Range | 6.5 - 7.5 | Protects fiber strength from acid/alkali degradation |
Widely used for dyeing cotton, viscose yarn, and blended natural fabrics where cost-effectiveness and high color yields are primary operational goals.
Essential for industrial packaging paper, tissue colorations, and decorative laminates. The dye exhibits high affinity to unbleached wood pulp.
Provides deep base color penetration in sheepskin and cowhide leather drums, establishing a uniform primer before surface finishing processes.
China stands as the global epicentre for dye synthesis, supported by integrated upstream raw material supply chains, highly automated production facilities, and robust logistical infrastructure. Sourcing Discount Direct Red 31 directly from Chinese manufacturers like Tianjin Sunrise Chem Group provides global buyers with significant cost savings, technical reliability, and scalability.
Our facility leverages decades of export experience, enabling us to establish a reliable reputation across diverse industrial sectors. We manage the entire lifecycle, from the synthesis of dye intermediates to the final drying and standardizing processes. This direct oversight ensures stable prices, independent of trading agent markups, and guarantees that international supply chains remain resilient in fluctuating markets.
Modern chemical manufacturing must prioritize eco-friendly innovation and carbon footprint reduction. Global brands face strict regulations concerning wastewater discharge and restricted substance limits (RSL). As a responsible chemical supplier, environmental protection is the cornerstone of our innovation.
ZDHC Level 3 & GOTS Certification: Achieving ZDHC Level 3 (Zero Discharge of Hazardous Chemicals) indicates that our company has implemented robust chemical management procedures and has met the most stringent global requirements for chemical handling, wastewater treatment, and pollution prevention. The Global Organic Textile Standard (GOTS) certification ensures that our dyestuffs are safe for use in organically certified textiles, guaranteeing that chemical inputs are minimized and that strict environmental standards are maintained across the entire supply chain.
By integrating advanced filtration systems and automated wastewater treatment plants, we balance industrial productivity with environmental harmony. This driving force directs the dye industry toward a more sustainable development path, delivering high-performance products for a greener textile industry and a sustainable future.
We always highly focus on the goods quality and stability. Each shipment is rigorously tested before sending to the port. Our testing procedures include spectrophotometric shade matching, high-performance liquid chromatography (HPLC) for purity analysis, and solubility verification under varied temperature profiles.
Demonstrated capacity to coordinate high-volume container transport to international terminals.
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. By building lasting partnerships, we strive to be a catalyst for our clients' success.
If you are looking for reliable, high-quality Dyes, we invite you to choose us as your trusted partner. We offer customized packaging solutions (ranging from 25kg drums to large bulk bags) and flexible payment conditions designed to align with corporate financial structures.
Our catalog features a diverse range of specialized anionic and cationic dyestuffs engineered to deliver robust performance. Explore some of our key product applications below:
Excellent color levelness and deep penetration on premium hides.
Vibrant orange shades for high-protein wool fibers.
Standardized black dye for uniform textile yarn dyeing.
Specialized forensic-grade powder with high absorption contrast.
Rich violet-blue tone, perfect for classic denim lines.
High solubility direct yellow for easy blending recipes.
Excellent bonding efficiency for kraft and corrugated papers.
Specifically engineered for pulp coloration and stability.
Answers to technical and logistical questions from global buyers and processing plant engineers.
Direct Red 31 is an anionic azo dye designed for direct application to cellulose fibers. It binds with the substrate primarily through hydrogen bonds and physical adsorption, eliminating the need for metallic mordants or reactive alkali fixation agents.
At Tianjin Sunrise Chem, we utilize automated computer color-matching systems alongside high-precision spectrophotometers. Every batch is matched against our internal standard to ensure the Delta-E deviation remains below 0.5.
Yes, our direct dyes are compliant with ZDHC Level 3 and GOTS standards. This guarantees that our products do not contain prohibited arylamines or heavy metals above regulated thresholds, making them suitable for eco-conscious textile brands.
To achieve optimal wash fastness, we recommend treating the dyed fabric with a cationic dye-fixing agent. This creates an insoluble ionic complex on the fiber, boosting wash fastness ratings to Grade 4.
Our standard packaging includes 25kg multi-layer kraft paper bags or plastic drums. For bulk buyers, we can customize pallet packaging. The typical MOQ for export is 1 metric ton, though trial quantities can be arranged.
Explore additional dyestuffs, pigments, and chemical agents available for mixed-load container transport.
Sunrise
