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HS Code |
640065 |
| Color Index | C.I.26050 |
| Chemical Name | Basic Red 1 |
| Synonyms | Rhodamine 6G |
| Cas Number | 989-38-8 |
| Molecular Formula | C28H31N2O3Cl |
| Molecular Weight | 479.01 g/mol |
| Appearance | reddish-orange crystalline powder |
| Solubility In Water | soluble |
| Melting Point | approx. 230°C (decomposes) |
| Uv Vis Absorption Max | 526 nm |
| Usage | dye for textiles, inks, and biological stains |
| Emission Maximum | 555 nm |
| Lightfastness | moderate |
| Ph Range | 3-7 |
| Toxicity | potentially harmful; handle with care |
As an accredited C.I.26050 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | C.I. 26050 is packaged in a 25 kg fiber drum with a secure, tight-sealing lid and clear hazard labeling. |
| Shipping | C.I. 26050, also known as Acid Red 52, should be shipped in tightly sealed containers, protected from moisture and direct sunlight. It must comply with local and international transport regulations. Label packaging clearly, and handle with appropriate personal protective equipment to prevent exposure during transit. Store in a cool, well-ventilated area. |
| Storage | C.I. 26050, also known as Rhodamine B, should be stored in a tightly closed container in a cool, dry, and well-ventilated area away from incompatible substances such as strong oxidizing agents. It must be protected from light, heat, and moisture. Proper labeling is essential, and it should be kept away from food and drink to avoid contamination. |
Applications of C.I.26050 in Industrial ManufacturingAs a direct manufacturer of C.I.26050, we support a wide range of industrial businesses requiring high-performance, vivid, and stable colorants. Below, we outline specific downstream sectors where manufacturers have integrated this colorant as a critical ingredient, detailing authentic regulatory, formulation, process, and finished product requirements for each application. 1. Textile Fiber DyeingTextile dyeing houses rely on C.I.26050 for bright and lasting coloration in synthetic and cellulosic fibers. Process engineers integrate this colorant to achieve precise shade reproducibility—especially on polyester, acetate, and blended yarns—while ensuring compliance with textile chemical standards and minimizing environmental releases. The dye enters during high-temperature, high-pressure jet or winch dyeing, ensuring even penetration, and is typically fixed with controlled reduction clearing. The end goods feature strong colorfastness and meet rigorous export and retailer specifications. Industry compliance standards
Typical usage ratio
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2. Plastic Resin ColoringMasterbatch and compound producers add C.I.26050 to engineering polymers and commodity plastics requiring intense, durable color. The colorant must maintain integrity through polyolefin or polyester compounding, resist migration or bleeding, and allow end molders to meet regulatory requirements for direct or indirect food contact plastics. The pigment disperses in the resin matrix under elevated shear during twin-screw extrusion, and careful dosing prevents plate-out or filter blockage. Final articles demand lightfastness, process stability, and compliance with regional plastics legislation. Industry compliance standards
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3. Printing Ink FormulationManufacturers of gravure, flexographic, and screen inks regularly formulate with C.I.26050 for achieving high-intensity, stable color on paper, film, and laminates. The dye’s solubility profile allows precise adjustment of viscosity and flow properties, crucial for fast-drying, high-speed inkjet and flexo lines. Print houses must ensure the finished ink does not release restricted aromatic amines or fail migration testing for food-packaging contact, and the ink formulation passes ISO and regional standards. Ink compounders integrate the dye during the let-down stage, balancing co-solvents and dispersants for uniform laydown and anti-settling. Industry compliance standards
Typical usage ratio
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Final product types
4. Leather Finishing DyesLeather finishing and tanning operations employ C.I.26050 to deliver vivid, highly-resistant color shades on aniline, semi-aniline, and corrected-grain leathers for automotive, footwear, and upholstery sectors. When controlled properly, this colorant develops intense, uniform color during drum-dye or finishing spray applications, ensures migration and sweat resistance, and fulfills sector-specific emission and fastness norms. Applications require precise control of water content, penetration rates, and tight shade tolerances to avoid batch variability or surface tackiness. The dye is blended in finishing emulsions or direct aqueous soaking fluids, enabling consistent uptake across hides. Industry compliance standards
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5. Paper Coloration & Specialty Paper CoatingProcessors in the paper industry use C.I.26050 to impart bright, uniform coloration to specialty and graphic papers, including colored office sheets, labels, and packaging boards. The colorant must show high affinity for pulp fibers, compatibility with retention aids, and resistance to fading or bleeding on end use. Papermakers incorporate the dye either in the wet-end for fiber-level coloration or in surface sizing and coating formulations, depending on required uniformity and bleed resistance. Compliance obligations focus on heavy metal limits and suitability for tissue and food packaging. Industry compliance standards
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6. Stationery and Watercolor PaintsProduction of water-based paints and stationery color products integrates C.I.26050 to achieve vivid, reproducible color hues for educational and office supplies. Compounders must balance pigment concentration for strong color laydown while maintaining flow and rapid drying properties. The dye enters during the dispersion step, aided by co-solvents and anti-settling additives. Regulatory focus includes compliance for use in children’s art materials and low odor, non-toxic profiles. The process ensures the final product releases no irritating volatile components and blends easily for user applications. Industry compliance standards
Typical usage ratio
Downstream process integration
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Bringing a coloring agent like C.I. 26050 to market always reflects years tied to reactors, close work with quality assurance, and adjustments made on the production line. Each batch carries the weight of that experience. C.I. 26050 stands as an organic pigment that manufacturers have relied on across a spectrum of applications. Our operations prioritize stability and purity at every step. Quality starts with raw materials, follows through synthesis and purification, and extends to tight controls on particle size and dispersibility. Modern facilities have to recognize variations between lots and minimize them. C.I. 26050 responds consistently, batch after batch. Users across coatings, inks, plastics, and textiles recognize this dependability, which supports tight timelines and smooth scale-up.
Technical teams working in colorants see firsthand that a few small changes in synthesis often have outsized effects. With C.I. 26050, we monitor crystal structure, water content, and contamination down to fractions of a percent. As a result, this product achieves strong tinctorial strength and resistance to solvents. A typical powder specification focuses on robust hiding power and high thermal stability—qualities hard-earned through investment in filtration, precision drying, and strict environmental standards in the plant. After drying and grinding, the color index and shade remain stable whether processed into a masterbatch or dispersed in a water- or solvent-based medium. Many companies struggle to produce the finer grades needed for ink jet formulations; our process has been stress-tested to handle those needs.
Inke manufacturers usually push a pigment further than most: stability in alcohol and high-speed dispersing means batch failures cost real money. With C.I. 26050, print runs experience fewer color drifts and less clogging, even in high-turnover processes. In the plastics sector, heat cycles can degrade weaker pigments. Long-term trial data on C.I. 26050 show little migration or fading, and feedback from injection molding shops confirms a sharper, more repeatable output. Textile dyers report similar reliability, with fixed recipes surviving varied fabrics and water chemistries. Supporting these customers doesn’t end at the loading dock. Chemists on our team answer questions about rheology and compatibility, helping partners dial in the right loading for their unique equipment and product requirements. Decades on factory floors and in labs taught us to view these as partnerships, not one-off transactions.
Choosing among organic pigments involves practical tradeoffs. Some competitors offer similar hues with marginally lower prices, but their product may leave performance gaps when run at scale. C.I. 26050 typically displays better lightfastness and stronger color intensity in demanding applications. Lower-grade imports often cause downstream headaches—like poor filterability or unexpected haze in clear systems. Too often, unfamiliar sources skip some post-process cleaning steps, introducing batch-to-batch instability. Over decades, direct feedback has shown us users expect a stable supply and identifiable improvement in finished goods. Long-standing relationships with customers mean we pick up on these pain points quickly. Supply chain disruptions can cost trust built up over years. We’re not just selling a color; we’re standing behind every drum with technical support engineers who know the product’s manufacturing history.
Industry shifts towards sustainable chemistry force real changes on plant floors. C.I. 26050 meets ever-tightening global standards, including reductions in heavy metals and improved handling protocols for effluents. Years ago, some common pigment precursors drew scrutiny for regulatory concerns. Our current process avoids these legacy chemicals. Regular audits and updates to wastewater treatment systems ensure runoff does not violate local or international standards. This comes from practical experience: missed compliance means costly plant shutdowns and loss of market access—not theoretical risks, but lived consequences. Product traceability means our partners can answer their own downstream audits without fear. We know shipping to Europe or Japan means a higher bar for purity, so every lot shipped supports documentation from raw material entry through final QA.
Ink and paint chemists often reach out about pigment flow properties and reactivity during high-energy milling. We discuss particle size, surface treatment, and flocculation from a direct experience of seeing those processes in action. For plastics, extrusion temperatures and polymer compatibility decide pigment choice. In our own R&D, C.I. 26050 performs well in polyolefins, PVC, and polystyrene, maintaining its integrity at all typical molding and forming conditions. Our field engineers can draw on years of trial results and lab tests to help partners eliminate color bleed or uneven dispersion. Textile dyers ask for color fastness data, and we back up claims with performance comparisons tracked against industry standards. This level of support comes from a culture where floor supervisors and lab chemists trade information—not as siloed departments, but as a single team used to solving real-world production problems together.
Consistency never happens by accident. We keep legacy records on process runs and tweak parameters that others ignore. The dry blending stage, for example, often affects shade in subtle ways. Years with blenders and mills show that mechanical shear, not just chemical composition, can introduce off-tones or reduce dispersibility. Tracking these minor variables means we can assure every drum of C.I. 26050 meets customer targets: no sudden changes, no unexplained batch-to-batch drift. Stability matters, especially for buyers producing internationally recognizable brands. Painful experience has shown the cost of recall or waste linked to minor variation, so plant culture insists on over-testing rather than cutting corners on final release.
Anyone who has worked the late shift knows challenges come up during scale-up or plant trials. Color loading looks different on a lab sample than a full production run. We help partners interpret these shifts: adjusting dispersion protocols, identifying possible contamination sources, or recommending alternate mill types based on hard data. Over the years, relationships with end users have resulted in practical tweaks to our formula. For example, changes in resins or solvents used by coatings manufacturers required us to refine surface treatments on C.I. 26050, balancing better wettability with minimal impact on filtration. Our technical support comes from real manufacturing history—seasoned staff who have solved these issues themselves, not just read about them in literature or pulled from generic FAQ sheets.
As a manufacturer, we see first-hand how market and regulatory pressure shape what ends up in our reactors. Twenty years ago, priority focused on color strength and price. Now, customers look for transparency with regard to raw material origin, carbon footprint, and lifecycle impact. Over several upgrade cycles, we moved to solvent recovery, energy-efficient dryers, and closed-loop water handling. C.I. 26050 ships with independent lab certification for every batch, including heavy metal content and solvent residue. We respond to requests for documentation supporting SVHC and RoHS compliance, not from a distance, but with details from our QA archives. Adapting to these requirements keeps us competitive without sacrificing product performance. Our partners rely on this openness when reporting to regulators, customers, or their own sustainability auditors.
Over decades, market disruptions—natural disasters, supply interruptions, trade disputes—have rewritten supply chain assumptions. C.I. 26050’s raw material sourcing shifted over the years, always in search of more reliable or higher-grade precursors. Rather than gamble with spot suppliers, we maintain stable relationships, sometimes trading short-term price spikes for longer-term supply guarantees. Our customers see the payoff in unbroken production when global transport gets delayed: long-term contracts, reserved inventory, and regional storage all help buffer those shocks. Maintaining consistency, especially for pigments in food packaging or pharmaceuticals, remains a logistical challenge handled behind the scenes. But for formulation chemists and plant managers, what matters is the pigment shows up on time and works every time—no forced reformulation, no scrambling.
Buildings and machines matter as much as formulas. Each processing line for C.I. 26050 reflects lessons learned from breakdowns and gradual upgrades. State-of-the-art milling, automated quality checkpoints, and in-line sampling have all become standard over years of reinvestment. Each improvement started with a challenge or a failure: a filter that blinded too early, a dryer that left uneven moisture. Addressing these means boots on the ground—engineers and operators meeting daily to trade insights and identify bottlenecks. As new standards for purity or performance arise, our teams invest not just to pass audits, but to make each production run smoother and safer. This hands-on, iterative process creates a pigment that proves itself in the field and the lab, not just on paper.
Many changes to C.I. 26050 trace right back to partners sharing problems or needs that our R&D team hadn’t anticipated. Smaller particle size options came about thanks to ink jet manufacturers calling out printhead clogging. Adjusting paste viscosity and improving filterability happened because coatings customers wanted higher throughput and less machine downtime. This kind of two-way feedback takes time and mutual trust. It’s never just a question of “What does the specification say?”—it’s “What is your process? Where do things go wrong?” As a direct producer, these connections let us improve and evolve our product, making C.I. 26050 more flexible, robust, and easier to integrate into the widest range of finished goods.
Catalog descriptions rarely capture the reality of pigment performance under real conditions. We know from field trials that some competitors don’t run the raw material purity checks we do. Performance slip shows up as shade drift, viscosity swing, or rework at the customer’s plant. Other suppliers talk up short lead times or headline performance values, but the story on a factory floor is about consistency and reliability. C.I. 26050 demonstrates its difference in those moments when the pressure is on: tight deadlines, unexpected supply chain hiccups, or tough new environmental limits. Long-haul customers don’t judge on appearance but on the product’s track record under stress.
Rather than treat C.I. 26050 as a static offering, every production cycle builds on experience. Each year, lab staff and operators review test data and customer feedback, targeting incremental gains in strength, dispersibility, and environmental impact. Our plant teams run side-by-side comparisons with previous lots to guarantee improvements are real, not just theoretical. These changes benefit downstream partners. A small shift in particle morphology can increase productivity in high-speed presses or reduce filter maintenance. Over time, continuous investment in skills and equipment cements both quality and trust, setting C.I. 26050 apart in a crowded field.
Acting as the origin manufacturer means accepting responsibility not just for the name on the drum, but for every variable involved: feedstock chemistry, reaction conditions, packaging, storage, and shipping. There’s no hand-off to a distributor or trader who might lose track of a shipping document or misinterpret end-use requirements. Quality assurance teams talk directly to plant engineers and end users. When a customer reports a challenge, the investigation starts with someone who worked the processing line, not an outsourced call center. This keeps improvement cycles short, honest, and practical. The knowledge gained from years of colorant production—handling thousands of tons, managing countless variations in demand, responding to every new standard or customer request—shapes a level of reliability that outsiders can’t simply replicate or resell.
In the grocery store, the print shop, the polymer line, or the textile plant, finished goods depend on invisible details set in motion long before arriving at final form. Quality pigments like C.I. 26050 support that chain. Our contribution comes from staying hands-on with every stage, learning from each technical challenge, and refusing to compromise on consistency or transparency. Partnerships with manufacturers pull us further, as requests change, formulations evolve, and new sustainability requirements set the agenda. The best lessons seldom come from sales meetings—they’re found in the day-to-day work of meeting expectations, solving small problems before they become expensive ones, and investing for the long term. For those who live and breathe chemical manufacturing, color means more than just a shade chart. It represents reliability, commitment, and pride in every lot shipped out the door.