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HS Code |
367258 |
| Cas Number | 6538-85-2 |
| Molecular Formula | C28H20ClN9Na3O16S5 |
| Molecular Weight | 1026.25 g/mol |
| Appearance | Yellow powder |
| Color Index Number | Reactive Yellow 1 (CI 18915) |
| Solubility | Soluble in water |
| Dye Class | Reactive dye |
| Application | Textile dyeing (mainly cotton) |
| Light Fastness | Good |
| Chemical Name | Trisodium 2-[(4,4'-bis(ethylsulfonyl)-o-tolyl)azo]-5,5'-(1,3,5-triazin-2-yl)di(4,1-phenylenebis(azo))benzene-1,3-disulfonate |
| Melting Point | Decomposes |
| Ph Range | 5-7 (1% solution) |
As an accredited Reactive Yellow 1 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | The packaging for Reactive Yellow 1 contains 500 grams, sealed in a durable, labeled plastic bottle with hazard and handling instructions. |
| Shipping | Reactive Yellow 1 should be shipped in tightly sealed containers, protected from moisture and direct sunlight. It is typically transported as a non-hazardous material, but standard safety protocols for chemical dyes must be followed. Avoid exposure to incompatible substances, and ensure proper labeling during transit. Store in a cool, dry place upon arrival. |
| Storage | Reactive Yellow 1 should be stored in a tightly sealed container, away from direct sunlight, moisture, and incompatible substances such as strong oxidizing agents. Keep the storage area well-ventilated and at a cool, stable temperature. Label the container clearly and ensure it is kept in a secure place to prevent accidental spills or contamination. Use appropriate personal protective equipment when handling. |
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Purity 98%: Reactive Yellow 1 with purity 98% is used in cotton textile dyeing, where it ensures high color yield and reproducible shade consistency. Molecular Weight 617.55 g/mol: Reactive Yellow 1 with molecular weight 617.55 g/mol is used in silk fabric coloring, where it provides excellent wash fastness and uniform dye penetration. Stability Temperature 120°C: Reactive Yellow 1 with stability temperature of 120°C is used in high-temperature jet dyeing, where it preserves vibrant coloration without thermal degradation. Solution pH 6.0-7.0: Reactive Yellow 1 at solution pH 6.0-7.0 is used in continuous dyeing of rayon fibers, where it delivers optimal dye fixation and reduced hydrolysis rates. Particle Size <10 µm: Reactive Yellow 1 with particle size below 10 µm is used in inkjet printing applications, where it promotes smooth print quality and prevents nozzle clogging. Solubility 60 g/L at 60°C: Reactive Yellow 1 with solubility of 60 g/L at 60°C is used in dye bath preparation for polyester blends, where it offers fast dissolution and homogeneous dye distribution. Light Fastness Grade 5: Reactive Yellow 1 with light fastness grade 5 is used in outdoor fabric manufacturing, where it maintains long-lasting color stability under sunlight exposure. Reactive Group Monochlorotriazine: Reactive Yellow 1 with monochlorotriazine reactive group is used in cold pad-batch dyeing, where it enables high fixation efficiency at low temperatures. |
Competitive Reactive Yellow 1 prices that fit your budget—flexible terms and customized quotes for every order.
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At our chemical plant, each batch of Reactive Yellow 1 starts with careful attention to the little details that go unnoticed outside the factory. For us, producing this dye isn’t just about following a recipe. It’s about keeping machinery fine-tuned, water at the right pH, and working together day and night so consistency doesn’t become a roll of the dice. Over the years, we’ve seen the best results when the staff stick to the basics—clean lines, functional pipes, and unclogged filters. It is true precision grows respect for colored molecules.
In textile dye houses, Reactive Yellow 1 gets called up for jobs where color needs to bite into cotton or cellulose fibers. Factory operators say it’s good for continuous dyeing because it stands up to salt and alkaline environments. Dyestuff handlers in the plant know the grainy yellow powder that comes out at the end of our spray dryers looks plain, but inside every drum, there’s a story made of steam, temperature checks, and tumbledurate filters. T-shirt makers and home textile producers order it because, even after a season of use, color still shows up strong.
The most recognized form leaves our line as a high-purity, salt-free powder with stable moisture content. Lab crew check shade, tonality, and strength for each run—sometimes by hand, not just by machine. When we pull off a drum for testing, we’re not guessing or relying on a spec sheet. We boil up a sample, splash it across a strip of cotton, and hold the result to the light. Those working on shirts in Bangladesh or towels in Turkey know the difference between Reactive Yellow 1 and the cheaper mixed dye substitutes.
In the cotton dyeing department, Reactive Yellow 1 delivers a sharp yellow with minimal chasing. Mill staff appreciate that, in long batches, reactivity holds. No operator wants to stand over a vat, correcting shade after shade. Production managers see fewer off-shades or second-quality rolls so output is steady, and customer returns drop. Our staff hear from customers that bright yellows sometimes bleed. Here, reports come back that Reactive Yellow 1 withstands repeated washing, even when finished pieces end up in laundry rooms with hard water.
Years ago, we learned what happens from skipping quality checks just to meet deadlines. The yellow went dull, strength dropped, and complaints spiked. Since then, we run checks at every stage—watching for too much heat during synthesis, catching impurities in the filters, sampling moisture after drying. Hands in the plant are stained yellow more than clean, but this comes from having to solve practical setbacks instead of just running numbers in an office. There’s pride in getting color matches so fabric shops don’t stress about blending two bolts from different dye lots.
Operators compare Reactive Yellow 1 directly with alternatives like Reactive Yellow 2 and blended dyes. The chemical structure in Reactive Yellow 1 suits batch and continuous dyeing, delivering level shades with less hydrolysis. That makes washing off easier—meaning less hot water wasted, thinner effluent, fewer stains in washing machines. Managers in finishing plants face fewer hassles balancing costs for auxiliaries and fixing agents. Reactive Yellow 1’s molecular structure results in tighter binding with cotton, so color holds steadier when tested for light and washing fastness.
Textile brands ask for transparency in ingredients, so plant staff keep logs not just for regulations but for traceability. Each bag and drum we ship is traceable back to the shift that packed it—down to the lot number and even the line worker assigned. The production team spends half their time talking to the QA department to avoid mismatches. Risk of banned substances haunts dyehouses, so we regularly update our methods. All batches pass screening for harmful aromatic amines before leaving. EU and local lists change, but it doesn’t pay to cut corners.
We keep waste tanks monitored for pH and organic load before sending anything downstream. Changing city regulations push us to constantly tinker with recipes, reduce salt, recycle washing water, and fine-tune effluent treatment. Over time, we adopted more closed systems and worked with textile mills to bring COD and BOD down. It hasn’t always worked out on the first try. Failures taught us that Reactive Yellow 1 tracks differently from older dyes—less hydrolysis means less breakdown in the effluent stream, making treatment easier for municipal plants.
Inside the factory, safety starts by preventing dust clouds during filling. Workers wear masks, keep floors swept, and handle bins carefully to cut down powder in the air. We keep the warehouse cool and dry—a must to prevent lumping from humidity. The dye is stable under normal storage but reacts to neglect. Once a spilled drum led to a morning of cleanup, spoiling a day’s production, so every worker learns the importance of sealing drums and checking for leaks. Routine safety drills and up-to-date protective gear aren’t optional.
Reactive Yellow 1 falls in the monoazo dye group, carrying a vinyl sulfone reactive group that latches onto cotton fibers under alkaline conditions. Lab technicians learned how the presence of hard water ions can nudge the shade ever so slightly; years on the job teach that every change—source of caustic soda, strength of auxiliary—shows up in the final shade. Not every alternative handles process variance as well as Reactive Yellow 1. That margin for error makes it a steady pick for mill managers who hate surprises.
Home textile producers call out the color’s resistance to light fading. Several brands avoid Reactive Yellow 4 and related dyes due to instability under sunlight or chlorine. Field feedback proves repeated sun exposure and household wash cycles don’t degrade the yellow as quickly as others. Towels and bed linens dyed with this product get tested in home machines and sunlight rather than just the lab, since real use exposes flaws faster. The yellow sticks fast, helping brands avoid costly warranty claims and dissatisfied shoppers.
In the supply chain, fabric lots come from multiple sources. Standardization matters, and any drift in shade or strength disrupts sewing, finishing, and final inspection. On the shop floor, different batches sometimes meet end-to-end. If colors diverge, rework saps margins. Reactive Yellow 1 gives us the closest shot at color consistency run after run. Dyehouses save on corrective overdyeing and reduced lots, and designers know what yellow to expect. Reliable color means tighter production schedules and less guesswork for brand quality managers.
Sometimes, rogue water contaminants or stray metal ions can shift the dye’s shade. We train dyehouse workers on correct cleaning procedures and provide technical advice when application starts to slide off course. Projects to optimize recipes keep plant teams engaged—deploying antiscalant if limescale spikes, switching to chelators during seasonal changes, holding batch times just long enough without wasting steam. The chemistry is simple, but skill in process control keeps Reactive Yellow 1 performing better than lookalike products.
As demand for bio-based textiles rises, major buyers press us to extend product testing for those fibers, not just standard cotton. Our technical team probes compatibility with lyocell, viscose, and new regenerated fibers. The yellow needs to grab hold without too much alteration to temperature or salt level. Some development batches taught us to tweak fixation times and drop salt levels to hit the right result. Upgrading dyeing strategies helps avoid product recalls or shifts in product branding for international retailers.
Reactive Yellow 1’s higher fixation rate compared to blended or older generation yellows offers environmental payoffs. Textile factories in regions with strict discharge guidelines pressure us to bring down salt usage. Our product allows for lower salt dosages without forcing longer process times. Over several years, collaborative tests with partners helped us trim tens of thousands of kilos of salt out of the annual operation cycle. Less salt means friendlier wastewater, lower operating costs, and an easier time passing audits for cleaner manufacturing certifications.
Waste minimization plans include reusing wash water and segregating process streams to recover unused dye. We work with mills to set up wastewater tank holding and monitor for yellow residues. Reports indicate that Reactive Yellow 1 gives high exhaustion rates—so most of the dye goes onto the fabric rather than down the drain. This leaves less pollution load and gives environmental managers fewer surprises. Continued monitoring and staff training double down on these gains, and on-site audits with customers spot issues before they snowball.
We treat complaints and customer returns as part of the job. When buyers from fabric mills flag sudden shifts—be it a stuck filter, an altered shade, or a batch packing mistake—plant managers sit down with the technical team, retrace steps, and chase solutions. Our best process improvements spark from these chain reactions, not design meetings. Over time, this helped build a yellow dye many buyers ask for by name rather than by generic type.
Our team regularly visits customer mills, running workshops with staff on best dyeing practices. There are always new faces in the room, some experienced, others green, and we lean into open Q&A sessions. Workers swap stories about temperature swings and water supply hiccups—a reminder that dyeing means working with what’s on hand, not a textbook. These sessions drill in the value of gradual alkali addition, water quality checks, and gentle agitation for best uptake. Experienced foremen often offer their own tweaks, ensuring process controls fit the local context.
Textile mills worldwide upgrade dyeing equipment to short-liquor ratio jets and more energy-saving paddles. Our product scientists test Reactive Yellow 1 on these systems, measuring behavior at lower bath ratios and higher throughputs. Operators worry about leveling and penetration. This dye flows well and maintains shade intensity at tighter water use—the color is as strong as in traditional machines. Reducing bath volumes cuts heating costs, fitting in with modern demands for lower energy footprints.
Brands selling into multiple countries ask for proof that each batch avoids restricted chemicals and hazardous byproducts. Our in-house compliance officers renew assessment standards and keep documentation for audits. Shipped lots travel with supporting data for both restricted substance lists and voluntary certifications. We embed quality checkpoints at every step and clean reactors regularly to ensure no cross-contamination. Frequent participation in third-party blind test programs holds us accountable.
Finished dye leaves the facility packed in sealed drums labeled for batch, fill date, and destination. We arrange shipping routes that limit exposure to extreme temps, which keeps the yellow stable. At customer sites, guidelines for safe storage cut down the risk of clumping or spoilage. Mills that use the dye within its shelf life avoid caking, and trained staff opening drums ensure nothing is wasted. Logistics staff note that predictable packing quality means no delays or extra handling costs.
Leaders in home furnishings and apparel keep returning to Reactive Yellow 1 after trialing alternatives. End product inspections in retail and distribution centers show strong shade retention and less color transfer, so everyday consumers notice bright colors over time. Fashion brands want to know their t-shirts and tops won’t lose luster after just a few washes. Across continents, retailers stick with cotton dyed using our product precisely for these reasons. This reputation gets built batch by batch; it’s not won through marketing but by earning trust at the machinery level.
Garment finishers and exporters sometimes flag issues with surface residues or skin sensitivity. Early in our operations, this feedback pushed us to invest more in process water quality and rinse schedules. Today, technicians spot-check samples for free dye, making sure nothing lingers that might cause a reaction. Fastness to perspiration and rubbing remains high due to the molecular binding on cotton, addressing most customer worries.
Dyers often need to mix primary colors for broader palettes. Reactive Yellow 1’s shade fits the mixing needs for greens and light oranges. Staff in our color matching room keep reference panels spanning years, verifying each lot for shade consistency. This work matters for brands running tight production schedules, where even slight errors mean new approval rounds or missed shipments. By holding to strict matching standards, we help our partners deliver on time.
Demand for skin-safe, low-allergen dyes grows every year. Consumer groups, retailers, and NGOs raise expectations for clean chemistry. Our research team works to keep pace, monitoring industry tests and addressing new requirements—no leftover banned amines, and lower usage of reactive auxiliaries. Our plant shifts overtime to modify manufacturing in response to new evidence. Factories learn fast—adapting processing and training to handle digital print applications or shorter dyeing cycles.
We keep our doors open to partners from all sides of the industry. Dye house technicians, brand quality managers, and environmental auditors know they get honest answers about our production. Our reputation stands not just on certificates but on years of proven product stability, rigorous testing procedures, and a grounded approach to improvement. We stay present at every step, from research through shipping and after-service. Delivering Reactive Yellow 1 is a craft built from experience, shared feedback, and relentless commitment to quality and responsibility.