Explore our premium grade dyes, liquid colorants, and high-performance pigments trusted by manufacturers worldwide.
Unveiling the chemical structure, performance properties, and structural parameters of Acid Yellow 36.
Acid Yellow 36, chemically designated as Metanil Yellow (C.I. 13065), is an anionic monoazo dye. Known for its strong dyeing capacity and vibrant golden-yellow hue, it exhibits exceptional affinity towards polar substrates like protein fibers, paper, and finished leather. The chemical structure ($C_{18}H_{14}N_{3}NaO_{3}S$) features a highly conjugated system linked by an azo bond (-N=N-), providing high molecular stability under standardized thermal conditions.
As leading manufacturers in China, Tianjin Sunrise Chem Group ensures that our production meets strict chemical purity limits. The acid-dye class relies on sulfonic acid groups that render the molecule water-soluble. Under acidic and neutral dyebaths, these molecules carry a negative charge, forming strong ionic links with protonated amino groups in wool, silk, and polyamides.
| Parameters | Technical Specifications |
|---|---|
| Color Index No. | C.I. Acid Yellow 36 (13065) |
| CAS Registry Number | 587-98-4 |
| Chemical Formula | C18H14N3NaO3S |
| Molecular Weight | 375.38 g/mol |
| Physical Appearance | Golden-yellow to orange-yellow powder |
| Solubility in Water | ≥ 20 g/L (at 90°C) |
| pH Application Range | 1.2 - 2.3 (transition color change indicators) |
Reliable manufacturing operations backed by quality certifications and strict control systems.
How China's production capacity meets localized industrial needs and global chemical regulations.
China serves as the central hub for the synthesis of Acid Yellow 36. This dominant role is backed by highly integrated chemical raw material chains, advanced waste-treatment facilities, and logistics centers near major ports like Tianjin. These assets allow manufacturers to supply international markets at competitive costs.
Modern buyers seek suppliers that offer consistent quality, bulk capacity, and clear regulatory compliance. Tianjin Sunrise Chem Group addresses these needs by combining chemical research with scalable production lines, helping businesses maintain stable manufacturing workflows.
Acid Yellow 36 is widely used in textile factories to dye wool, silk, and nylon fibers. It forms ionic bonds under controlled acid conditions, producing bright yellow hues with good wash fastness.
Used in the paper industry for coloring kraft paper and pulp. It features high solubility and affinity, allowing uniform coverage on cellulose fibers during beater dyeing processes.
For high-end leather goods, this dye provides level penetration in chrome-tanned and vegetable-tanned leathers, giving fashion and industrial leather products a rich, uniform color base.
A leading global supplier of high-quality dyestuffs and customized colorant solutions.
Tianjin Sunrise Chem Group, specializes in manufacturing high-quality dyestuffs. Including 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 has been tested before sending to the port. ZDHC level 3 and GOTS certificate makes your quality 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 provide 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.
The ZDHC program is 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.
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 can bring 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.
A look at the chemical engineering processes used in the manufacturing of Acid Yellow 36.
The manufacturing of Acid Yellow 36 starts with the diazotization of Metanilic Acid (m-aminobenzenesulfonic acid) using sodium nitrite in an acidic medium at low temperatures (typically 0-5°C). This creates a reactive diazonium salt, which is then coupled with diphenylamine under controlled pH conditions.
Maintaining the reaction temperature is critical: variations can cause secondary reactions that yield insoluble impurities or reduce color strength. By using automated cooling jackets and real-time pH tracking, our plants ensure high coupling yields and minimal side products.
After coupling, the dye is precipitated by adding sodium chloride (salting out), filtered, and dried. Standard production methods often leave high salt content in the product. Our facility uses advanced membrane desalinization and spray drying to produce low-dust, low-salt formulations. This results in faster dissolution and better stability in liquid dye blends.
A full range of specialized colorants developed for wool, paper, leather, and plastic applications.
Preserving the packaging and warehouse project operations of Sunrise Chem Group.
We not only produce and export dyes, pigments but also prioritize long-term cooperation with our customers, providing them with quality services that exceed their expectations. Allow us to explain why choosing us is the best decision for your business.
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.
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.
Navigating global regulatory landscapes and supply logistics.
Operating in the global chemical sector requires adherence to strict local regulations. Our Acid Yellow 36 and other chemical colorants are produced to comply with the European Union’s REACH regulation and the United States’ TSCA framework. This ensures our products are ready for import into key Western markets.
We provide safety document packages, including detailed Safety Data Sheets (SDS) formatted to the Globally Harmonized System (GHS), Certificates of Analysis (COA) for every shipment, and country-of-origin documentation. This documentation helps streamline custom clearances and compliance checks.
We understand that different mills require unique dye characteristics. Our technical centers work with local agents to offer direct support. We assist with recipe adjustments, color matching on varied fiber types, and wastewater treatment protocols, helping you optimize production while meeting ecological requirements.
Common questions about the chemistry, application, and storage of Acid Yellow 36.
Explore our additional line of direct, basic, and solvent dye formulations for global industrial markets.
Tianjin Sunrise Chem Group manages the entire supply chain, from bulk production to shipping coordination. Our lab testing processes help maintain consistent quality across all production runs. We partner with textile mills, paper factories, and industrial users to deliver solutions tailored to their application requirements.
Sunrise