Our comprehensive manufacturing capabilities produce diverse dyestuff series serving the textile, paper, leather, and polymer industries worldwide. Explore our highlighted formulations below:
Direct Yellow Gk (chemically referred to in the Color Index as C.I. Direct Yellow 12, and widely known as Chrysophenine G) is a symmetrical symmetrical stilbene-azo dyestuff. Characterized by its brilliant, greenish-yellow shade and outstanding affinity for cellulosic fibers, Direct Yellow Gk has established itself as an indispensable colorant across several industrial domains, including textile dyeing, pulp and paper shading, and leather coloration.
The molecular configuration of Direct Yellow Gk contains functional sulfonate groups that guarantee excellent water solubility, combined with a conjugated planar structure that promotes intermolecular hydrogen bonding and van der Waals interactions with cellulose polymer chains. Consequently, it achieves significant exhaust rates without the absolute requirement for complex metal mordants, making it a highly cost-efficient and structurally sound colorant option.
Precision formulation is vital to ensuring color consistency across distinct production batches. Tianjin Sunrise Chem Group ensures that our synthesized Direct Yellow Gk strictly complies with the following structural and performance parameters:
| Parameter Description | Value / Standard Specification |
|---|---|
| Color Index Name | C.I. Direct Yellow 12 (Chrysophenine G) |
| CAS Registry Number | 2870-62-4 |
| Molecular Formula | C30H26N4Na2O8S2 |
| Appearance | Uniform Yellow-Brown Powder / Stable Aqueous Liquid Form |
| Shade / Color Strength | 100% ± 3% (Standard comparison) / Custom adjustments available |
| Water Solubility | ≥ 30 g/L (at 90°C) |
| Light Fastness (ISO 105-B02) | Grade 4 - 5 |
| Acid/Alkali Resistance | Highly stable in pH range 6.0 - 9.5 |
The international chemical supply chain is undergoing a structural transition. Modern dye procurement managers are no longer merely seeking the lowest per-ton price; instead, the selection framework has shifted toward comprehensive lifetime value, chemical safety compliance, and supply continuity. As a prominent China Direct Yellow Gk factory, Sunrise Chem Group addresses these shifting procurement requirements:
Industrial automated color-matching systems in paper and textile mills require zero spectrophotometer deviation (ΔE < 0.5) to avoid expensive down-time and off-shade batches.
With global consumer brands enforcing strict Restricted Substance Lists (RSL), source colorants must be free of restricted arylamines, conforming with REACH and OEKO-TEX guidelines.
To protect workshop operators and improve dissolving efficiency, mills are demanding micro-granulated, dust-dampened powders or direct liquid dye equivalents.
Cross-border shipments require verified container-loading integrity, robust intermediate bulk container (IBC) setups, and dependable ocean freight coordination.
Tianjin Sunrise Chem Group specializes in manufacturing high-quality dyestuffs. Our extensive product portfolio includes Direct dyes, Acid dyes, Basic dyes, Sulphur dyes, Solvent dyes, Liquid dyes, and Fluorescent dyes.
Backed by decades of industry and export experience, we have built a reputation for reliability and excellence, serving clients from diverse sectors including denim, textile, leather, paper, and plastic. We always highly focus on the goods' quality and stability. Each shipment is rigorously tested before being dispatched to the port. Our ZDHC Level 3 and GOTS certificates ensure your quality is fully guaranteed.
We pride ourselves on offering customized solutions. Our team of experts works closely with clients to understand their unique needs and delivers tailored products and services. We actively seek strategic partnerships to expand our reach and enhance our offerings. Collaborate with us to explore mutual growth opportunities.
Environmental protection is the cornerstone of our innovation. We dedicate ourselves to providing clients with eco-friendly, high-quality colorants that balance productivity with environmental harmony, driving the industry towards a more sustainable development path while delivering high-performance products—for a greener textile industry and a sustainable future.
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 also 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.
To maximize color yield and wash/light fastness when using Direct Yellow Gk, application engineers must carefully optimize the dyeing environment depending on the substrate. Here are our recommended protocols:
Direct Yellow Gk demonstrates exceptional affinity to bleached and unbleached wood pulp. Add the dissolved dye to the pulper before sizing agents. Keep the pH of the pulp slurry between 6.5 and 7.5. For sizing, use aluminum sulfate (alum) to lock the dye molecules onto the cellulose fibers, preventing wastewater discoloration.
For exhaust dyeing, run at 85°C to 95°C to promote dye migration and levelness. Introduce sodium chloride (10-20 g/L) as an electrolyte to promote exhaustion. Run for 40-60 minutes, then lower the temperature gradually. Use a cationic after-treatment fixing agent to significantly improve wet fastness and washing performance.
During chrome-tanned leather processing, apply Direct Yellow Gk during the neutralization phase. Ensure the drum temperature is kept at 50°C to 60°C. Fatliquoring processes should follow dye penetration to lock the brilliant yellow colorant deep within the fiber structure, maintaining uniform surface color.
Alongside Direct Yellow Gk, Sunrise Chem Group operates advanced production lines for a complete range of organic colorants designed to meet specific technical requirements:
At Sunrise Chem Group, we acknowledge that chemical safety is the primary requirement for international trade. Our production facilities maintain compliance with global standards, supporting our buyers through critical chemical safety checks.
The ZDHC program represents a collaborative effort by leading brands, retailers, and suppliers in the textile and footwear industry to reduce the use of hazardous chemicals. The focus of this certification is on eliminating the release of hazardous chemicals into the environment throughout the entire supply chain. Achieving ZDHC certification indicates that our company has implemented robust chemical management procedures and has met the stringent requirements for chemical handling, wastewater treatment, and pollution prevention.
The Global Organic Textile Standard (GOTS) is a certification that ensures the organic status of textiles from the harvesting of raw materials to environmentally and socially responsible manufacturing. The GOTS certification guarantees that the textiles are made from organic fibers, that chemical inputs are minimized, and that strict environmental and labor standards are met throughout the production process. GOTS certified products are considered to be sustainable, safe, and ethical.
Both certifications are critical for sustainable and responsible textile production. ZDHC focuses on the elimination of hazardous chemicals, while GOTS certification guarantees the organic and ethical aspects of the textile production process.
As industrial dye application systems become increasingly automated, the technical roadmap for Direct Yellow Gk centers on two core developments:
Transitioning from powder dyestuffs to aqueous liquid formulations is a growing industry standard. Liquid Direct Yellow formulations eliminate dust hazards in chemical preparation areas, reduce dissolution times, and permit automated pump dosing systems to run continuously. This step helps optimize throughput and consistency in modern paper mills and textile processing houses.
Through advanced catalytic processes during the condensation phase, our R&D team works to continually minimize the formation of manufacturing by-products. This enables us to offer colorants that meet strict MRSL requirements, ensuring compliance and peace of mind for our international brand partners.
We not only produce and export dyes and pigments but also prioritize long-term cooperation with our customers, providing them with quality services that exceed their expectations. Our modern storage facilities and secure loading protocols ensure every container arrives at its destination in optimal condition.
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.
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.
Explore the remaining selections from our export catalog, featuring specialized solvent, basic, direct, and inorganic mineral colorants:
To assist dye formulation experts and procurement teams in sourcing Direct Yellow Gk, we have compiled answers to common technical queries:
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