Tengfei Creation Center,55 Jiangjun Avenue, Jiangning District,Nanjing admin@sinochem-nanjing.com 3389378665@qq.com
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Basic Red 1

    • Product Name Basic Red 1
    • Alias Rhodamine B
    • Einecs 219-232-0
    • Mininmum Order 1 g
    • Factory Site Tengfei Creation Center,55 Jiangjun Avenue, Jiangning District,Nanjing
    • Price Inquiry admin@sinochem-nanjing.com
    • Manufacturer Sinochem Nanjing Corporation
    • CONTACT NOW
    VTB
    Specifications

    HS Code

    375653

    CAS_Number 989-38-8
    Molecular_Formula C18H22N4
    Molecular_Weight 294.40 g/mol
    EINECS_Number 213-584-9
    Other_Names Rhodamine 6G base, C.I. Basic Red 1
    Appearance Dark green powder
    Solubility_in_Water Soluble
    Melting_Point 260 °C (decomposes)
    Color_Index_Number 45160
    Usage Dye for textiles, paper, and leather
    pH_Value 6.0–7.0 (1% solution)
    Odor Odorless

    As an accredited Basic Red 1 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.

    Packing & Storage
    Packing The chemical "Basic Red 1" is packaged in a sealed 100-gram amber glass bottle, clearly labeled with hazard and handling information.
    Shipping **Basic Red 1** is typically shipped as a solid powder in tightly sealed containers to prevent moisture exposure. It is classified as hazardous; transport should comply with relevant regulations (e.g., UN 3077, Class 9 for environment). Proper labeling, documentation, and handling by trained personnel are essential to ensure safety during shipping.
    Storage Basic Red 1 should be stored in a tightly sealed container, in a cool, dry, and well-ventilated area away from incompatible materials such as strong oxidizers. Keep it away from direct sunlight, heat sources, and moisture. Clearly label all storage containers, and ensure access is limited to trained personnel. Follow all relevant safety and regulatory guidelines for chemical storage.
    Application of Basic Red 1

    Applications of Basic Red 1 in Industrial Manufacturing

    Basic Red 1 serves as a key cationic dye in several industrial fields, offering high affinity for cellulose, modified polymeric fibers, paper, and select leather goods. With consistent batch quality and scalable supply capability, our Basic Red 1 aligns with the latest industrial processing and regulatory demands. Detailed below are its principal downstream uses in industry.

    1. Textile Dyeing: Acrylic and Polyacrylonitrile Fibers

    Textile manufacturers widely use Basic Red 1 for dyeing acrylic and polyacrylonitrile (PAN) fibers, producing vibrant red shades with maximum color fastness. The dye chemically bonds to the fiber during pressurized dye-bath processes, ensuring deep penetration and uniform coverage. Process engineers must adjust temperature, pH, and electrolytes based on fiber origin and targeted color depth. This application requires stringent compliance with textile chemical standards and consistent formulation to meet export-level demands for apparel and home textiles.

    Industry compliance standards

    • OEKO-TEX® Standard 100 (Annex 6)
    • ZDHC MRSL v3.1 Compliance for dye substances
    • REACH (EC) No 1907/2006 Registration for textile chemicals
    • ISO 105-C06 (Color fastness to domestic and commercial laundering)

    Typical usage ratio

    • 1.2%–3.5% on weight of fiber (owf) depending on shade depth and fiber denier
    • Higher ratios for deep reds; process data drives incremental adjustment

    Downstream process integration

    • Added at dye bath preparation stage; dissolves under stirring and elevated temperature (80–100°C)
    • Combined with leveling agents and auxiliary chemicals for shade uniformity
    • Post-dyeing fixation with cationic after-treatment for wash fastness

    Final product types

    • Solution-dyed acrylic staple fiber
    • Dyed acrylic yarn for knitting/weaving
    • Ready-to-wear garments (sweaters, sportswear)
    • Home textiles (blankets, upholstery fabric)

    2. Paper Industry: Shade Correction and Decorative Papers

    Decorative and specialty paper producers apply Basic Red 1 to achieve intense red, pink, or magenta hues for packaging and stationery. It is introduced during the wet-end of the papermaking process, where cationic dyes show strong affinity for cellulose, even in recycled pulp mixtures. Strict metering and on-line color monitoring control the dosage and color consistency, complying with technical paper and packaging standards for consumer safety and migration limits.

    Industry compliance standards

    • EN 646:2019 (Determination of colorfastness of dyed paper)
    • FDA 21 CFR 176.170 (Paper and paperboard in contact with aqueous and fatty foods)
    • German BfR Recommendation XXXVI (Paper and board for food contact)
    • EC Regulation No 1935/2004 (Materials in contact with food)

    Typical usage ratio

    • 0.05%–0.15% based on dry weight of pulp, depending on base color and paper grade
    • Higher levels for saturated solid color papers; tinting uses minimal amounts

    Downstream process integration

    • Dosed into the pulp slurry before sheet formation
    • Dispersed using high-shear mixing systems in the wet-end
    • Further stabilized with fixatives or retention aids to increase shade retention

    Final product types

    • Color printing papers
    • Gift wrap and decorative boards
    • Food packaging liners (where allowed by local regulations)
    • Stationery and craft papers

    3. Leather Finishing: Coated Leather Goods

    The leather finishing sector uses Basic Red 1 for topcoats and finishes on semi-aniline and pigmented leathers, providing strong chromatic intensity and resistance to abrasion or migration. The dye is dispersed in waterborne or solvent-based polyurethane finishing emulsions, adhered by spraying or curtain-coating. Consistent formulation and process validation ensure compliance with directive limits on chromium, azo compounds, and aromatic amines.

    Industry compliance standards

    • EN ISO 17234-1 (Detection of certain azo colorants in leather)
    • German LFGB Section 30/31 (Materials in contact with skin)
    • REACH Annex XVII (Restrictions on hazardous substances)
    • Leather Working Group (LWG) chemical management protocol

    Typical usage ratio

    • 0.3%–1.1% by weight of finish formulation, dependent on desired hue and substrate absorbency

    Downstream process integration

    • Blended into polyurethane or acrylic dispersions prior to application
    • Applied as a topcoat after base dyeing and fatliquoring
    • Cured at elevated temperature to fix color and polish surface

    Final product types

    • Fashion leather handbags
    • Automotive upholstery hide
    • Luxury footwear uppers
    • Leather accessories and cases

    4. Coloration of Industrial Inks: Flexography and Gravure Printing

    Basic Red 1 finds critical application in water-based and solvent-based flexographic and gravure inks for disposable packaging, retail labels, and advertising media. It delivers fast-drying, high-brilliance magenta hues compliant with current packaging migration and safety regulations. Formulators combine it with dispersing agents and pH adjusters to reach optimal print viscosity and printhead compatibility.

    Industry compliance standards

    • Swiss Ordinance SR 817.023.21 (Printing inks for food packaging)
    • EuPIA Guidelines on Printing Inks
    • GMP Regulation (EC) No 2023/2006 for ink manufacture
    • ISO 2846-1:2017 (Color and transparency of printing inks)

    Typical usage ratio

    • 0.6%–2.5% in ink premix, exact percentage determined by depth and opacity requirements

    Downstream process integration

    • Mixed into pigment or colorant premix during ink mill operation
    • Thoroughly milled with resin binders for uniform dispersion
    • Blended at final let-down stage with additional solvents or water

    Final product types

    • Flexible packaging films
    • Food and beverage carton labels (where allowed by local regulation)
    • Advertising banners and posters
    • Disposable paper cups and plates (outer print)

    5. Wood Stain and Panel Coloration: Engineered Wood Industries

    Wood-based panel and engineered wood manufacturers routinely use Basic Red 1 to impart red tints to MDF, HDF, particle board, and decorative veneer alternatives. The dye provides strong migration resistance and lightfastness, especially when combined with UV-cured acrylics and melamine-formaldehyde finishes. On-site quality control teams rigorously test for migration, release, and emission standards, particularly for applications in exposed or coated architectural surfaces.

    Industry compliance standards

    • EN 71-3:2019 (Migration of certain elements for wooden toys/surfaces)
    • EN 13986 (Wood-based panels for construction)
    • CARB ATCM 93120 (Formaldehyde emissions for composite wood)
    • German DIN 53160 (Color fastness to saliva and sweat)

    Typical usage ratio

    • 0.08%–0.35% based on resin or lacquer weight, adjusted for shade and coverage

    Downstream process integration

    • Injected into resin, lacquer, or impregnation bath before pressing/forming
    • Applied as a pre-coating or during overlay paper impregnation
    • Followed by lamination and high-pressure curing

    Final product types

    • Decorative HPL panels
    • Furniture boards and moldings
    • Laminate flooring with exotic wood effect
    • Colored architectural MDF elements
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    Competitive Basic Red 1 prices that fit your budget—flexible terms and customized quotes for every order.

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    Certification & Compliance
    More Introduction

    Basic Red 1: Experience, Application, and Distinctiveness—Direct from the Manufacturer

    As manufacturers with decades spent turning raw ingredients into dyes that power textile innovation, we know the subtle touch of color can set products apart. Basic Red 1 has been part of our workshop since the early days of synthetic colorant development, and it continues to serve customers who demand bold, stable red hues that last through a garment's daily journey. This commentary will not just introduce the product but offer years of technical know-how and problem-solving examples our teams have explored around this important dye.

    Basic Red 1: What Makes It Distinct in the Lab and Factory

    Basic Red 1, chemically recognized as Basic Red 1 (CI 45160), stands as a cationic dye with an unmistakable vivid red shade. Our manufacturing process emphasizes high purity—closely controlled precipitation, fine-milled powders, and careful packaging—to keep every batch as consistent as the last. The colorant itself demonstrates a characteristic strong magenta-red tone, favored in both fashion textiles and specialty paper applications since the early 20th century.

    We find textile processors repeatedly coming back to Basic Red 1 when they require a dye that delivers on several fronts: ease of dye bath formulation, high exhaustion, and bold, lightfast results across a range of substrates. The ionic nature of this colorant plays a major role here, providing a reliable bond with acrylic fibers, certain modified polyesters, nylon, and some blends, especially when conditions call for high-clarity chroma. Compared to acidic dyes, the cationic structure of Basic Red 1 delivers better uptake in acrylics, leading to deeper color at lower concentrations. In paper, its versatility shines in lignin-rich and depleted pulp processes; we've adjusted grind and particle size over the years to meet shifting requirements from specialty paper makers.

    Model and Specifications: Lessons from Practical Production

    In our experience, basic dyes demand tight control over multiple parameters—particle size, moisture, purity, and impurity profile. Customers often ask why batch-to-batch quality remains so critical. In the case of Basic Red 1, purity above 98% ensures there is minimal bleed during dyeing and maximum reproducibility between textile runs.

    Our standard model delivers the dye as a crystalline powder, with a moisture content below 2%, eliminating unnecessary variability during formulation. The color index number (CI 45160) matches all major international dye standards, and our protocols rule out common contaminants like heavy metals and insoluble salts. We keep measures of pH within an optimal range to favor both dissolvability and compatibility with auxiliary agents—experience taught us harshly alkaline batches can interfere with color consistency or even damage yarns.

    Granularity matters. We keep average particle size under 10 microns, preventing clumping in automatic dispensing units, while supporting rapid dispersion in cold water dyeing. Machines run week after week without clogging, freeing operators from the frustration of downtime just to chase blockages—a real cost and headache for larger mills.

    Application: Reliable Color for Evolving Markets

    Decades at the color bench show us that even a classic dye like Basic Red 1 adapts alongside new process trends and evolving market pressures. Textile producers want robustness across faster, high-volume dyeing operations while maintaining visual brilliance in both synthetic knitwear and cellulose-rich materials. Basic Red 1’s solubility in water, along with rapid fiber take-up, offers fast and predictable shade build, letting dyehouses achieve targeted depth without drifts or unwanted undertones.

    We’ve partnered with acrylic manufacturers across Asia and Europe, supplying tailored batches for jet dyeing, package dyeing, and continuous pad dyeing lines. Jet dyeing, a gold standard for uniform color penetration, benefitted from our advancements in salt content reduction—less salt means less corrosion and easier wastewater management, an issue that continues to shape environmental policy for manufacturers and their customers.

    Knitting plants comment time and again on the dye’s resistance to fading. Unlike traditional acid dyes, which can lose brilliance with frequent washing, Basic Red 1 locks into acrylic fibers and withstands repeated exposure to UV light or mild detergents. Batch trial after batch trial shows stable shade retention after forty home laundry cycles, critical for ready-to-wear and sportswear labels.

    Beyond fibers, Basic Red 1 finds practical use in specialty papers—flyers, labels, event cards—thanks to high color intensity even at low dosage. The dye delivers smooth, continuous tone across machine-glazed surfaces, and it behaves predictably in both acid and neutral sizing workflows. Here, paper makers ask for low-dust powders that don’t clog their metering pumps. Years ago, we invested in improved micronization and dust-suppression additives based on feedback from mill operators, cutting down on pigment clumping in bulk bins.

    Safety, Handling, and Workplace Considerations

    Managing a chemical plant also means championing safe worksites. We design our processes to minimize exposure risks for production and end-users. Basic Red 1 has low vapor pressure, which cuts inhalation risk, but we still recommend closed transfer systems and personal protective equipment during handling. Over the years, we've worked to lower the content of volatile organic compounds in our formulations, minimizing off-gassing in dye shops and sewing rooms—a worker-friendly shift, especially in confined factory settings.

    Industrial wastewater regulations tighten every year. We’ve responded by reformulating certain process additives, cutting out persistent organic pollutants and narrowing the profile of auxiliary agents. For example, we help clients with effluent treatment steps, providing guidance on flocculation and coagulation techniques so that any residual cationic colorant is captured rather than released. Following years of lab testing, we’ve flagged the importance of not mixing large doses of Basic Red 1 with copper or iron-rich water supplies—these can trigger unexpected precipitation and reduce dye uptake.

    Comparisons: How Basic Red 1 Differs from Other Colorants

    Choice of red dye in industry boils down to three factors: fiber compatibility, washing and light fastness, and cost-in-use. We answer questions nearly every week about why a mill might choose Basic Red 1 over something like Acid Red 18 or Direct Red 23. From experience, the ionic structure determines where the dye performs best. Basic Red 1, being a cationic, bonds tightly with acrylic and acrylic-blend fibers, where acid dyes often produce weaker or uneven results.

    Direct dyes find purpose on cotton and cellulose, but their performance on synthetics is outclassed by cationics like Basic Red 1. Ask a technical manager at a sock production unit in Bangladesh—they’ll confirm acid and direct dyes can’t match the rapid build or depth-on-shade achieved with our product on acrylics, even when water conditions shift. That saves both time and the raw dye itself. Clothes keep their vibrancy longer, and producers report a drop in returns due to early fading.

    Toxicological constraints shape modern choices as well. Earlier generations of basic dyes raised concerns about aromatic amine content and heavy metal contamination. We led campaigns to lower both, working with regulatory agencies on every continent. Our current product consistently falls below international safety thresholds—something we’ve achieved through cleaner synthesis routes and continuous monitoring, not shortcuts or after-the-fact fixes. That reliability, not just cost, brings repeat customers.

    In the niche of paper coating, magenta acid dyes often yield softer, more pastel shades and can require extensive post-treatment to prevent migration. Basic Red 1, in contrast, bonds more readily to both uncoated and sized paper, reducing need for additional binders. Customers looking for a single-shot, no-fuss deep red without excess chemicals routinely select our brand and save both labor time and formulation cost.

    Meeting Shifting Market and Regulatory Demands

    Manufacturers feel the impact of changing textile and chemical regulations. Current industry priorities include lower chemical discharge, reduced heavy metal residues, and transparency across the supply chain. We’re part of collaborative projects on three continents focused on reducing byproducts at the source, not just filtering them out downstream. In practice, we apply step-wise monitoring during each stage—from raw material intake to final packaging—to detect and prevent build-up of restricted substances.

    Our latest batches of Basic Red 1 are subjected to full-spectrum analyte screening—testing for aromatic amines, banned metals, and traces of formaldehyde—well before shipment reaches the loading dock. Partner dyehouses have come to recognize the advantage of clean runs: less filter clogging, lower machine maintenance, and stronger assurance to brand auditors. These points often matter as much as shade intensity or color repeatability.

    Sustainability Initiatives and Customer Collaboration

    Years of technical dialogue taught us sustainability only succeeds with honest, long-term cooperation between producer and user. We’ve invested steadily in solvent recovery systems, improved energy recirculation, and staged water effluent treatment. With Basic Red 1, we not only offer environmental data for every batch, we collaborate directly on process optimization. Dyehouse engineers bring us water samples, run comparative exhaust tests, and work side by side with our chemists to minimize colorant runoff and auxiliary loads.

    For example, many Asian textile processors have adopted our recommendations on short bath ratios and salt-free dyeing techniques. Practical data from these field tests feed directly into refinements of our large-scale reactors and finishing lines. The end result often means a real reduction in salt discharge, easier equipment cleaning, and lighter environmental audit paperwork for everyone. Reducing environmental footprint is not just policy—it's a shared outcome of accessible data and real customer experience year after year.

    Process Optimization: Addressing End-User Challenges

    No process runs without hiccups. Over the years, we’ve seen every manner of issue, from poor dispersion on high-speed lines to operator errors in weight calculations. One frequent scenario involves color drift due to inconsistent water hardness. We supply detailed guides for local adaptation—suggesting buffer salts and agent combinations based on water analysis from actual dyehouse sources. Trouble-shooting on-site, we've found it pays to share adjustment protocols that don’t require a chemistry degree—simple, visual checks for clouding, pH stick measurements, and dosing changes keyed to seasonal shifts in ground water.

    Another consistent area of improvement lies in fastness. End users—in retail and home textiles—care about resistance to sunlight, detergent, and rubbing. Our real-world trials track shade loss across multiple wash cycles, not just in a laboratory but with consumer-level appliances and detergents. Customers with largest batch volumes—like large uniform suppliers—report less than 5% drop in visual intensity after months of regular laundering, meeting their demanding tender specifications.

    We notice new textile developments putting pressure on legacy colorants. The spread of microfiber and new polyester blends demands real-time investigation of compatibility. We invest in pilot-scale dye trials and invite current and potential buyers to participate, ensuring our formulations work as expected even on the latest synthetic developments. This feedback loop drives us toward continuous product tuning—a cycle that never ends.

    Basic Red 1: Commitment to Reliable Supply and Quality

    Our position as a manufacturer—not a reseller—comes with both burden and opportunity. We control every step, from incoming raw materials to quality assurance before shipment. Customers see real benefit in this vertical integration. Lead times stay short, outages rare, and specification deviations almost never reach the customer floor. For clients producing color-critical goods—flag manufacturers, premium sportswear producers, or export-driven dyehouses—consistency and supply reliability outweigh pennies saved per kilogram from uncertain sources.

    Over the years, supply disruptions from third-party vendors have reinforced the importance of having direct dialogue between dye maker and user. Knowing which shift manager packed your batch, having a technical hotline reach our lead chemists, understanding traceability on every drum—these details are built into our customer rapport, leading to practical trust that outlasts contractual words.

    The Value of Experience: Listening to Customer Needs

    Working directly with end-users exposes us to the challenges and creative solutions that emerge daily in dye shops and manufacturing lines. Customers tell stories of order surges before festival seasons, new legislation impacting allowable substances, last-minute shade matching for critical deliveries. We live these realities with them, updating production priorities on the fly and adapting workflow to changing market needs.

    Engineering teams at our facilities have spent years fine-tuning everything from mill speed to packaging materials. Shifts in fiber blends, paper pulp sources, or auxiliary chemistry spur direct changes in our handling and QA practices. Our network of regional partners keeps daily feedback flowing, whether the issue is an unexpected precipitation in hard water towns or a sudden drop in absorption on cold days. Rather than ignore these, we see opportunities for deeper collaboration, from targeted customer training to tweaks in surfactant blend or batch temperature.

    Future Developments and Research Directions

    Innovation in dyes moves at a steady pace, shaped by end-use feedback and shifting ecological requirements. We continue to invest in lowering the resource footprint of Basic Red 1—exploring new synthesis routes that cut energy input, looking for greener solvents, and testing recyclable packaging. Unveiling fresh research in annual customer gatherings, we invite feedback from partners keen to push both performance and sustainability.

    Dye formulations will keep evolving as new fibers come to market, as global regulations keep getting stricter, and as consumers seek safer, lower-impact products. Our ability to deliver on these fronts rests on decades of laboratory expertise, field-testing with actual manufacturers, and the willingness to update practice in light of real-world results. Basic Red 1 stands as proof: an established colorant remains relevant only when the maker listens, learns, and adapts—never taking “good enough” as the final word.

    Conclusion: Basic Red 1, Built on Manufacturing Know-How

    Basic Red 1 continues to play a powerful role for textile and paper producers seeking reliable, vivid red hues with consistent, dependable performance. Behind every batch stands not just a process, but the collective learning of those who engineer, refine, and troubleshoot in the real world. The value we provide as dye manufacturers runs deeper than technical data—it’s a commitment to continuous improvement, hands-on service, and mutually beneficial innovation. Whether you’re producing the next fashion trend or a specialty industrial product, experience with Basic Red 1 brings not just color, but a lasting relationship built on trust, technical strength, and an open ear to future needs.