C.I. Solvent Blue 2N, scientifically registered under Color Index as Solvent Blue 35 (CAS No. 17354-14-2), is an anthraquinone-structured oil-soluble dye known for its vibrant greenish-blue hue, exceptional thermal stability, and superior lightfastness. In global industrial chemistry, Solvent Blue 2N is widely considered a key standard for coloring polymers, petroleum products, engineering plastics, and specialized printing inks.
Unlike water-soluble acid or direct dyes, Solvent Blue 2N possesses high solubility in organic solvents such as aromatic hydrocarbons, esters, and ketones. This unique property makes it indispensable for applications requiring high-temperature processing, where water-based alternatives would fail due to chemical decomposition or migration.
Expert Insight: "Solvent Blue 2N stands out in polymer coloration because of its highly stable anthraquinone rings. This structural configuration prevents thermal degradation even at temperatures exceeding 280°C, a prerequisite for modern engineering thermoplastics." - Chief Technical Officer, Tianjin Sunrise Chem Group.
To ensure high performance in polymer and ink formulations, procurement teams must evaluate key physical and chemical characteristics. The table below represents the benchmark parameters of Sunrise's premium-grade Solvent Blue 2N (Solvent Blue 35).
| Parameters | Specifications / Benchmark Values | Testing Standards & Methods |
|---|---|---|
| Chemical Name | 1,4-Bis(butylamino)anthraquinone | IUPAC Nomenclature |
| Color Index Number | C.I. Solvent Blue 35 (2N) | C.I. Registry |
| CAS Registry Number | 17354-14-2 | CAS Database |
| Molecular Formula | C22H26N2O2 | Elemental Analysis |
| Heat Stability | 280°C - 300°C (In Polystyrene) | DIN 53772 Standard |
| Light Fastness | 7 - 8 Grade | Blue Wool Scale (ISO 105-B02) |
| Solubility | Soluble in Xylene, Chlorobenzene, Ketones | Gravimetric Method at 25°C |
| Moisture Content | ≤ 0.5% | Karl Fischer Titration |
The high thermal stability profile detailed above makes Solvent Blue 2N the colorant of choice for engineering plastics such as Polystyrene (PS), Polycarbonate (PC), Polyester (PET), and Polymethyl Methacrylate (PMMA). Unlike lower-grade dyes, it does not sublime or bleed during high-shear extrusion or injection molding cycles.
Globally, the dye and pigment industry is moving towards highly specific chemical formulations that align with circular economy policies. Solvent Blue 2N occupies a crucial market position due to its versatility in multiple industrial chains. In the Americas and Europe, stringent restrictions on halogenated and heavy-metal containing pigments have shifted the focus toward high-purity organic solvent dyes.
Additionally, the rapid expansion of the consumer electronics, automotive components, and food packaging sectors has surged the demand for transparent and bright masterbatches. Solvent Blue 2N, offering unmatched optical clarity in transparent polymers, has become a core building block for masterbatch formulations globally.
In terms of fuel and petroleum coloring, international tax and safety regulations mandate the marking of fuels. Solvent Blue 2N is highly valued in this sector due to its low viscosity impact, high concentration coloring efficiency, and resistance to extraction by unauthorized chemical agents.
As the world's leading producer of colorants and chemical intermediates, China represents the epicenter of the global dye supply chain. Chinese factories, particularly market leaders like Tianjin Sunrise Chem Group, offer unmatched strategic advantages:
By locating production close to the supply hubs of anthraquinone intermediates (such as 1,4-dihydroxyanthraquinone), Chinese factories minimize logistics costs and secure their supply chains against global market fluctuations.
High-capacity reactors and automated production processes allow manufacturers to control batch-to-batch variables, driving down production overheads while maintaining strict adherence to client parameters.
Modern Chinese manufacturing units operate with state-of-the-art waste treatment systems. Strict adherence to Zero Liquid Discharge (ZLD) norms ensures consistent production schedules without environmental downtime.
Tianjin Sunrise Chem Group combines decades of export and manufacturing expertise to deliver optimized color solutions globally. Each shipment of Solvent Blue 2N is subjected to rigorous quality checks, including high-performance liquid chromatography (HPLC) and spectrophotometric analysis, guaranteeing a Delta E (ΔE) color variance of less than 0.5 compared to client reference samples.
Our commitment to global standards is verified by our active participation in environmental audits. With ZDHC Level 3 and GOTS (Global Organic Textile Standard) certifications, Sunrise provides not only premium products but also the regulatory security necessary for modern compliance-driven markets.
The industrial versatility of Solvent Blue 2N spans several highly demanding applications. Below is an analytical breakdown of how this dye performs across key sectors:
During the compounding of Polystyrene (PS) or Polycarbonate (PC), Solvent Blue 2N is blended with plastic granules before extrusion at 260°C - 280°C. Its excellent dispersion properties prevent spot aggregation, ensuring high optical clarity in transparent bottles, containers, and sheets.
Used as a critical fiscal marker dye for lubricants, diesel fuel, and gasoline. It dissolves rapidly in aliphatic hydrocarbons, providing a distinct green-blue marking that remains stable under UV light exposure and does not clog engine fuel injectors.
In flexographic and gravure inks, Solvent Blue 2N is formulated with ketones and alcohols. It offers strong tinting strength and high gloss on aluminum foils, films, and coated papers, meeting the strict requirements of modern packaging lines.
Explore our wide selection of industrial dyestuffs engineered for maximum performance across paper, textile, plastic, and coating sectors.
Tianjin Sunrise Chem Group manages seamless industrial workflows, from clean chemical compounding to high-volume shipping configurations.
The global solvent dyes market is experiencing structural changes driven by raw material availability and stricter environmental policies. The three primary trends shaping the future of Solvent Blue 2N include:
Global procurement teams looking to secure their supply chain should focus on factors beyond unit cost. Key aspects of chemical supply chain resilience include:
Stable Output Capacities: Choosing a supplier with large-scale manufacturing facilities prevents production bottlenecks and guarantees consistent lead times.
Technical Support Integration: High-performing suppliers do not just deliver products; they actively help resolve client coloration challenges by custom-blending masterbatches or formulating specialized solvents.
Regulatory Compliance Auditing: Partnering with manufacturers that hold active ZDHC, GOTS, and ISO certifications protects downstream brands from sudden regulatory shutdowns.
Although both are oil-soluble anthraquinone dyes, Solvent Blue 2N (Solvent Blue 35) features two butylamino chains, whereas Solvent Blue 36 features isopropylamino chains. This structural difference gives Solvent Blue 2N higher solubility in non-polar organic solvents and a slightly greener blue hue compared to Solvent Blue 36.
The stability is a direct result of the anthraquinone ring structure, which resists thermal degradation under high temperatures. This allows the dye to preserve its chemical structure and color properties during high-temperature injection molding cycles of engineering plastics.
Yes, but only under high-purity specifications. Dyes intended for food contact must comply with strict national regulations (such as FDA or EU 10/2011) regarding heavy metals and primary aromatic amines. Sunrise offers specialized high-purity grades that meet these standards.
Solvent Blue 2N shows high solubility in aromatic hydrocarbons (like xylene and toluene), ketones (like MEK), and esters (like ethyl acetate). It is less soluble in short-chain alcohols (like ethanol), which may require the addition of a co-solvent to achieve stable solutions.
We use advanced color spectrophotometers and HPLC testing to analyze every production batch. We measure color strength and color values (ΔE, Δa, Δb) against standard reference samples to guarantee that variance is kept within strict tolerances (ΔE < 0.5).
Sunrise is fully certified under the Global Organic Textile Standard (GOTS) and the Roadmap to Zero Discharge of Hazardous Chemicals (ZDHC) program, where we hold Level 3 compliance status. These certifications verify that our production processes do not release hazardous chemicals into the environment.
Tianjin Sunrise Chem Group specializes in manufacturing and exporting high-quality dyestuffs. Our product range includes Direct Dyes, Acid Dyes, Basic Dyes, Sulphur Dyes, Solvent Dyes, Liquid Dyes, and Fluorescent Dyes. Backed by decades of industry experience, we have built a strong global reputation for reliability, serving clients in the textile, denim, leather, paper, and plastic sectors.
We prioritize product quality and batch stability. Every shipment undergoes rigorous testing before dispatch. Our certifications, including ZDHC Level 3 and GOTS, guarantee compliance with international environmental standards.
We also specialize in customized solutions, working closely with clients to formulate products that meet their specific requirements. Contact us to explore strategic partnerships and discover how we can support your business goals.
Cooperating with leading textile and paper mills globally has allowed us to establish long-term partnerships based on mutual trust. These collaborations provide our partners with consistent order fulfillment, shared resources, and reliable technical support. Our mission is to drive growth by delivering reliable, high-performance, and custom-tailored colorant solutions.
We are dedicated to sustainable innovation. We provide eco-friendly, high-performance colorants that balance production efficiency with environmental care—helping lead the chemical industry toward a cleaner, more sustainable future.
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