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Solvent Brown 41 (also known structurally under various industrial monikers including Bismarck Brown G/Y Base, and Colour Index 21010:1) is a specialized disazo chemical dyestuff. Characterized by its high molecular stability and rich dark-brown shade, it is uniquely formulated for organic solvent systems where water-soluble dyes fail. As a premium-grade industrial dye, it dissolves seamlessly in polar solvents such as ethanol, glycols, and ketones, as well as hydrocarbons and oil-based resins when engineered correctly.
At Sunrise Chem Group, our chemical synthesis process ensures that Solvent Brown 41 meets rigorous industrial performance standards. Its molecular structure consists of benzene rings coupled through azo bonds to m-phenylenediamine cores. By refining the coupling reaction stages, we reduce unreacted aromatic amines and ensure a clean, high-affinity base dye suitable for polymers, wood finishes, and industrial coatings.
| Property Description | Value / Range | Testing Method / Standards |
|---|---|---|
| C.I. Name | Solvent Brown 41 (C.I. 21010:1) | International Color Index System |
| Physical State | Fine Red-Brown Powder | Visual / Internal QC Standard |
| Heat Resistance | Stable up to 150°C - 180°C | DSC Thermal Analysis |
| Light Fastness (Xenon Arc) | Grade 5 - 6 | ISO 105-B02 Standard |
| Acid / Alkali Resistance | Excellent Stability (pH 3 to 10) | Spectrophotometric Verification |
| Solubility Profile | Ethanol: ≥ 25g/L; DPM: ≥ 40g/L | Gravimetric solubility test at 25°C |
How industrial partners incorporate Solvent Brown 41 across global markets to solve engineering and design challenges.
In high-end furniture manufacturing and architectural coatings, color depth is paramount. Solvent Brown 41 exhibits exceptional penetration into natural cellulose matrices. Due to its solubility in glycol ethers and alcohols, it forms ultra-transparent stains that accentuate wood grain patterns without causing wood fiber swelling. This makes it a benchmark choice for nitrocellulose (NC) and polyurethane (PU) wood lacquers.
Solvent Brown 41 is critical for polymer pigmentation, particularly for engineering plastics like polystyrene (PS), polycarbonate (PC), and poly(methyl methacrylate) (PMMA). Its high thermal tolerance prevents molecular decomposition during high-temperature injection molding and extrusion, securing brilliant, non-migrating color tones in automotive interiors and consumer goods packaging.
The global packaging sector relies on high-speed rotogravure and flexographic printing inks. Solvent Brown 41 provides excellent compatibility with binding agents like shellac, vinyl resins, and polyamide. Its rapid dissolution profiles enable smooth runnability in printing machinery without causing nozzle clog or screen blocking, leading to vibrant metallic brown finishes on food-grade foils.
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.
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. 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.
Technical guidelines to maximize the stability and color yields of Solvent Brown 41 in your production line.
Engineers must carefully assess the solvent environment when formulating with Solvent Brown 41. It exhibits supreme compatibility with alcohol-ether co-solvents like PM (Propylene Glycol Methyl Ether) and DPM. For ecological staining products, ethyl lactate can be integrated to reduce VOC profiles without precipitating the dye molecules.
To avoid speckling in high-solids systems, we recommend preparing a 10-15% concentrate solution of Solvent Brown 41 under high-speed agitation (1500 RPM) at 45°C. Let the solution age for 12 hours before blending it into the main resin vessel. This step eliminates micro-aggregates and guarantees consistent light absorption.
For applications in contact with sensitive materials, migration resistance is critical. Incorporating small portions of metal-complex secondary stabilizers can lock the Solvent Brown 41 inside the polymer matrix. Sunrise Chem provides customized blends designed specifically for non-bleeding performance in rigid plastic films.
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. 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.
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.
Both certifications are important in the context of 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. Sunrise Chem continuously researches and develops bio-based organic solvents that pair with Solvent Brown 41, driving down the chemical footprint of our industrial clients.
Innovation pipelines driving the modernization of solvent-based colorants globally.
As regulatory boards worldwide tighten limits on VOC emissions, the demand for water-reducible and green-solvent soluble dye configurations grows. Tianjin Sunrise Chem Group is leading this shift by engineering modified versions of Solvent Brown 41 with increased solubility in non-toxic bioderived solvents like lactate esters and methyl soyate. Our target is to offer 100% compliant wood and leather dyes that maintain their thermal characteristics while cutting air pollutant discharge by 50%.
Furthermore, we are investing heavily in molecular refinement technology. By introducing selective crystallization stages during our synthesis of Bismarck Brown derivatives, we have successfully isolated fractions with ultra-low salts and free primary amines. This ensures safer handling for workers in chemical compounding plants and results in cleaner final products for end consumers.
A look into our logistics capability, warehouse facilities, and production scale.
Expert technical insights regarding Solvent Brown 41 sourcing, compliance, and formulation stability.
Solvent Brown 41 (CAS 8005-77-4 / 50294-04-7, C.I. 21010:1) belongs to the disazo chemical class. It is synthesized by coupling tetrazotized meta-phenylenediamine with meta-phenylenediamine under strict temperature and pH control. Unlike direct or basic dyes, it exists as a free base system, imparting exceptional solubility in organic solvents and resins.
We operate an advanced eco-testing lab equipped with GC-MS and HPLC-MS systems. Every single production batch of Solvent Brown 41 undergoes rigorous raw material screening and final synthesis testing. This ensures that restricted arylamines, heavy metals, and other restricted processing chemicals are well below the limit set by the ZDHC MRSL (Manufacturing Restricted Substances List) Level 3 standard.
As a pure solvent dye, Solvent Brown 41 is insoluble in pure water. However, it can be incorporated into water-reducible systems (such as water-borne wood stains) by first dissolving it in a mutual coupling solvent (e.g., Dipropylene Glycol Monomethyl Ether) and then blending it with an aqueous acrylic or polyurethane dispersion with high shear. Our technical department offers pre-blended liquid solutions for partners running water-borne lines.
We standardly pack Solvent Brown 41 in 25kg multi-layer fiber drums with internal polyethylene liners to prevent moisture intake. For high-volume manufacturing, we offer 500kg super-sacks or custom packaging configurations. All shipments are palletized, shrink-wrapped, and loaded securely at Tianjin Port with comprehensive COA (Certificate of Analysis) and SDS documents.
When stored in its original, unopened packaging in a cool, dry, and well-ventilated warehouse away from direct sunlight and incompatible materials (like strong oxidizing agents), the shelf life is at least 3 years. We recommend re-testing the moisture content and solubility before use if stored for more than 36 months.
A complete selection of acid, basic, sulfur, direct, and custom complex dyes for international distribution.
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.
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