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HS Code |
661148 |
| Cas Number | 12221-32-0 |
| Chemical Formula | C19H21N3 |
| Ec Number | 235-468-9 |
| Color Index | Basic Yellow 40 |
| Appearance | Yellow powder |
| Molecular Weight | 291.39 g/mol |
| Solubility In Water | Soluble |
| Application | Dye for textiles and paper |
| Lightfastness | Moderate |
| Synonyms | C.I. Basic Yellow 40, Astrazon Yellow G |
| Uses | Colorant in inks and plastics |
| Stability | Stable under normal conditions |
| Storage Conditions | Keep container tightly closed in a cool, dry place |
| Odor | Odorless |
As an accredited Basic Yellow 40 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Basic Yellow 40 is packaged in a 500-gram sealed, high-density polyethylene bottle, labeled with hazard warnings, chemical name, and batch information. |
| Shipping | Basic Yellow 40 should be shipped in tightly sealed containers, protected from moisture and direct sunlight. It is typically transported as a non-hazardous dye, but care should be taken to avoid spills and dust generation. Ensure labeling complies with local regulations and include Material Safety Data Sheet (MSDS) during transit for safety. |
| Storage | Basic Yellow 40 should be stored in a tightly sealed container in a cool, dry, and well-ventilated area, away from direct sunlight and sources of heat or ignition. Keep it away from incompatible substances such as strong oxidizers and acids. Ensure containers are clearly labeled. Use secondary containment to prevent accidental spills and follow all relevant safety and regulatory guidelines. |
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Purity 98%: Basic Yellow 40 with 98% purity is used in textile dyeing processes, where it ensures high color yield and uniform shade distribution. Molecular Weight 425.55 g/mol: Basic Yellow 40 with a molecular weight of 425.55 g/mol is used in paper coloration, where it delivers stable and intense yellow hues. Stability temperature 120°C: Basic Yellow 40 stable up to 120°C is used in plastic compounding, where it maintains its chromatic integrity during extrusion. Particle Size D50 3 μm: Basic Yellow 40 with a D50 particle size of 3 μm is used in inkjet ink formulations, where it enables smooth dispersion and high-resolution print quality. Lightfastness Grade 4: Basic Yellow 40 with lightfastness grade 4 is used in leather finishing, where it offers moderate resistance to fading under UV exposure. pH stability 4-9: Basic Yellow 40 stable from pH 4 to 9 is used in water-based paint systems, where it provides consistent color performance across varying pH levels. Solubility 25 g/L: Basic Yellow 40 with solubility of 25 g/L is used in aqueous dye baths, where it achieves rapid dissolution and homogeneous distribution. Melting Point 150°C: Basic Yellow 40 with a melting point of 150°C is used in thermoset resin applications, where it remains stable during curing processes. Viscosity 5 mPa·s: Basic Yellow 40 with a viscosity of 5 mPa·s in standard solution is used in liquid marker inks, where it ensures smooth flow and consistent marking. Residue on ignition <0.5%: Basic Yellow 40 with residue on ignition less than 0.5% is used in electronic component coloration, where it minimizes inorganic contamination risks. |
Competitive Basic Yellow 40 prices that fit your budget—flexible terms and customized quotes for every order.
For samples, pricing, or more information, please contact us at +8615365186327 or mail to admin@ascent-chem.com.
We will respond to you as soon as possible.
Tel: +8615365186327
Email: admin@ascent-chem.com
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As a manufacturer who has spent decades refining chemical processes, each batch of Basic Yellow 40 that leaves our site reflects the work ethic and expertise our teams bring to the floor daily. We don’t view Basic Yellow 40 as just another dye in a catalog. This colorant, with the recognized C.I. number 11021, occupies a central role in the textile, paper, and ink industries. From experience, customers count on us for clarity and reliability – not just in specifications, but also in the routines and controls that ensure you don’t see surprises in shade or solubility.
Producing Basic Yellow 40 for such a wide market means working directly with fiber manufacturers, textile processors, ink formulators, and quality managers. Over the years, our teams have listened to feedback from production lines, from operators running high-speed dyeing machines to print shops where registration on large-format presses accepts no margin for error. We base each process step and quality standard on real-world demands and lessons learned in partnership with those of you running day-to-day production.
Formulators and technicians ask about shade, strength, and lightfastness. There’s no shortcut around those topics, so we make sure our specifications reflect predictable, batch-to-batch consistency. Our Basic Yellow 40 falls into what’s known as the pyrazolone class of dyes, distinguishable by its clear, bright, almost greenish-yellow hue. The powder flows smoothly for easier feed into your systems, avoiding clumps or moisture caking. Whether you work in bulk dyeing, pad applications, or inkjet inks, performance is linked to particle purity and minimal dispersants.
Every kilo produced in our plant undergoes spectral analysis and visible light testing to ensure a target strength (measured by absorbance) that matches reference standards. Teams verify water solubility to meet print and paper house needs. Basic Yellow 40 brings consistent shade even at low concentrations – no drifting from one lot to the next, no deviations in the chroma. That’s not an accident. Our approach improves process control over reaction time and pH adjustments to tighten the production window. Over time, we have refined filtration and drying steps, so dust levels stay low and the bulk product doesn’t break down during storage or shipping.
We hear specific operational feedback, such as residue left on machines or buildup in supply lines. In response, our plant team thoroughly screens out oversized particles. Clients operating automated blending tanks praise the way our Basic Yellow 40 disperses in solution, keeping filters clear and minimizing downtime during color changes. This isn’t a marketing pitch — it’s the direct result of regular conversations with dye house engineers, coating technicians, and even machine operators who know their lines better than anyone.
Basic Yellow 40’s role in paper tinting means every variable ends up under the microscope during production runs. We’ve been called into mills facing streaking on light stocks or spotty coverage at high speeds. After troubleshooting, consistent color strength with exact pH and ionic properties reduces adjustments in the downstream process. In some applications, color uniformity matters less than bleed resistance. Our R&D team has tuned the dye’s performance to deliver both: clear tint and stable binding on cellulose and fiber surfaces.
Textile dyeing calls for even more control over bleed and washfastness. Our ability to manage purity impacts crocking and migration. Customers working with cellulosic blends or synthetics have pointed out where small tweaks to particle size yield fewer complaints about unevenness after washing or UV exposure. To address lightfastness, we’ve refined the final heat treatment, so garments, ribbons, or decorative trims keep their color under natural and artificial light. Production doesn’t stop at shipping. Many of our clients send photos and test panels from finishing lines. They expect feedback and advice if formula results fall short of expectations.
Basic Yellow 40 has seen growing demand in ink and coating formulations. Inkjet producers rely on the stability of dye dispersions in water-based systems. Shelf life matters, so every container leaves our site with moisture and pH checks to prevent premature degradation. Years ago, we began a collaborative effort with print technicians to tackle foaming and settling issues that came up at volume scales. Thanks to that work, our Basic Yellow 40 resists settling during mixing and operates smoothly on high-speed inkjet lines, minimizing downtime and waste from ink blockages.
Not every yellow dye on the market does what Basic Yellow 40 manages daily. There’s often confusion over product selection. Say you work in a multi-shade print shop or textile house dealing with allergen labeling; choices matter. Many so-called equivalent yellow dyes show similar shade at first glance, but fall short under accelerated testing or season-to-season weathering. Basic Yellow 40, manufactured from decades of formulation data, stays truer in color performance after repeated exposures to heat, light, and chemical bleaches.
In fiber dyeing, we have seen how some alternative yellow pigments or acid dyes develop unwanted tint or fade after washing. Synthetic substitutes may boast higher initial brilliance, but fade at a rate that demands frequent product recalls or reworks — a headache that racks up costs and erodes trust in your brand. For years, production managers have come back to us with samples after such trials, looking for “old reliable” Basic Yellow 40. Results matter more than catalog specs. Our experience gives us the authority to say not all yellow dyes play the same role, especially across different fibers, formulations, or storage conditions.
The cost pressure on manufacturing often tempts managers to switch to unproven substitutes. We have seen accidents where off-brand dyes led to clogged nozzles, machine shutdowns, or weak color development. It becomes clear that short-term savings give way to bigger loss of trust and additional maintenance costs. In every project involving a color transition, our technical team sits down with clients, runs pilot batches, and shares firsthand lessons about what works and what puts production at risk.
Over the past decade, regulatory lists in Europe, North America, and major Asian markets have evolved. Textile and packaging brands run regular audits, checking dye composition down to trace levels. For a manufacturer, this means no room for unknowns. Every time a change appears in the restricted substances lists, we invest in additional analysis, tracking, and documentation. Our batches of Basic Yellow 40 undergo repeated screening for aromatic amines and heavy metals, even where regulations don’t require it, because we know customers in high-transparency markets ask tough questions.
Sustainability claims demand real proof, not empty promises. Clients concerned with cradle-to-gate impacts have pushed us to examine production inputs, energy usage, and lifecycle data. We’ve made measurable changes – switching to more efficient reactors, recovering process water, and using closed systems for powder handling. Continuous improvements in our plant deliver not just a safer workplace, but also fewer emissions and less process dust. We invite customer audits, walk through production areas in person, and show our data and procedures up front. In an age where greenwashing is everywhere, hard evidence counts far more than marketing copy.
People in our industry talk about “safer colorants” or less harmful processing. We know from direct experience that even minor deviations in raw material quality or production methods affect end-user safety. Our in-house QA, not outsourced labs, monitors each input stream and final pack-off. Customers ask for formal statements of origin and production traceability; we gladly provide them, building trust person-to-person as well as company-to-company.
New demands often arrive with little notice. As global regulations tighten on microplastics and other additives, we stay ahead by reviewing every change in process aids and functional auxiliaries. Basic Yellow 40 development didn’t end with the original manufacturing process; we adapt formula changes, update documentation, and share new test data with those of you navigating the same tough standards.
A technical spec sheet gives a static picture, but the real world of manufacturing always adds surprises. From first-hand involvement on production floors, we handle a steady flow of practical questions. What about powder flow in automated feeders? Over the years, our shift supervisors have tackled bridging or clumping in humid storerooms and adopted improvements in packaging and drying. We train our warehouse crews to minimize dust and moisture ingress, knowing even small mishandling can lead to inconsistent dosing or caking.
Some operations want easy open bags and high clarity labels for lot tracing. We switched over to better bagging line technology, invested in more durable label adhesives, and run checks on barcode readability at the packing station. Our returns department sees almost no product sent back for packaging failures, thanks to insights gathered from dozens of logistics partners and supply chain meetings.
On the mixing floor, operators need assurance that the dye disperses rapidly, without clogging lines or leaving sediments in feed tanks. We keep open channels for customer support, with our plant supervisors answering troubleshooting calls and sharing tips that come from real experience, not a manual. For process engineers adjusting dosing rates, our technical leads walk them through pilot runs and even onsite visits, sharing dosing curves, settlement rates, and filter maintenance tips gleaned from our own installations.
No production line ever runs 100% trouble-free. We’ve seen it all: tint mismatches, overdosing panic during a shift change, questions about why a previous year’s batch looks “off” in this year’s run. Our lab keeps retained samples from every production lot; we compare these samples with new colors, re-test absorbance, and review operating logs to track down the root cause and prevent recurrence.
Trouble often traces back to old pipelines, hard water deposits, or accidental cross-contamination from previous colorants in shared tanks. We’ve helped customers track down outside sources of error, sometimes showing how their own cleaning routines impact results. Our approach is hands-on. If necessary, we send technical teams to customer plants, roll up our sleeves, and walk through the process with production staff to see the problem in person.
Several feedback cases have brought up issues with shade shifts when switching to more energy-efficient equipment or trying new chemicals upstream. Changes in water temperature, pH, or feed rate – these all have visible effects on the end shade. Our advice always goes beyond “read the manual.” Instead, we run side-by-side batch trials, watch for drift, and help fine-tune the process until new equipment and formulations blend seamlessly with our Basic Yellow 40.
Labs sometimes send us wildcards: new finishing agents, tests of bleach resistance, even advanced aging protocols under UV exposure. Our teams don’t hide from unusual requests. Every plant visit and feedback session sharpens our troubleshooting skills and helps us improve next year’s manufacturing campaign.
Any large manufacturer can fill orders. Building trust takes time, honest feedback, and owning up to mistakes. We’ve had customers chase down their shipment schedule during supply chain crunches, and we know one late delivery can jeopardize a whole week’s production in their plant. Our logistics and sales teams respond directly, give truthful updates, and don’t cover up bad news.
People working with us stick around because we stand behind what leaves our loading dock. We share technical updates, invite plant managers to audit us, and open our production floor for training visits or troubleshooting sessions. Service doesn’t end after shipment. Our account leads follow up long after delivery to gather feedback, compare lab results, and, if needed, recommend tweaks to downstream parameters for best results.
Working with international customers brings language and regulatory hurdles. Over years of dialogues and mutual learning, we’ve built up document libraries, translated specs, and shared bilingual support for major global partners. None of these efforts arose from abstract strategies – they came from day-to-day demands voiced in emails, phone calls, and plant visits.
Some companies promise innovation; we see improvement as a daily task. Teams meet regularly to compare production batches, discuss ideas for energy savings or better dust controls, and share issues logged by the quality department. Every process upgrade in our plant follows insights gained from actual use cases and common customer challenges. Improvements start on the shop floor, not at a corporate retreat.
If we learn about a new filter medium that traps more fines, or a better batch-drying protocol, we test it and scale up only after site-level evaluation. Supervisors know the difference between textbook theory and what actually works in the plant. Adjustments in temperature ramp rates, milling speed, or even staff shift patterns find their way into operations if they can be shown to benefit the end customer.
This hands-on mindset extends to environmental initiatives. We update facilities to lessen energy use in dye synthesis, improve recycling of solvent streams, and optimize waste collection well ahead of regulation. Pledge alone means little if it’s not backed by action on the ground, visible in both energy bills and final wastewater analysis.
Markets change fast, and standards only get higher. Our people keep pace by listening to operators, production engineers, and procurement leads every season Basic Yellow 40 is produced. Industry trends bring new color targets, sharpened regulatory controls, and tighter customer lead times. We adapt by tightening internal controls, investing in equipment, hiring skilled staff, and keeping our best people engaged through ongoing training and direct customer engagement.
Basic Yellow 40 has remained a go-to product on vibrant color cards and in demanding production environments for a reason: reliable consistency, strong technical support, and a willingness to put real service behind every order. Our experience in chemical manufacturing shows that you earn trust by following through each step, batch after batch, and by partnering closely with those putting your products to the real test every day.