Acid Yellow S-2G

    • Product Name: Acid Yellow S-2G
    • Alias: Acid Yellow 17
    • Einecs: 235-548-0
    • Mininmum Order: 1 g
    • Factroy Site: Yudu County, Ganzhou, Jiangxi, China
    • Price Inquiry: admin@ascent-chem.com
    • Manufacturer: Ascent Petrochem Holdings Co., Limited
    • CONTACT NOW
    Specifications

    HS Code

    988313

    Product Name Acid Yellow S-2G
    Chemical Class Azo dye
    Color Index Number C.I. 18965
    Appearance Yellow powder
    Solubility In Water Soluble
    Molecular Formula C16H11N5Na2O7S2
    Molecular Weight 515.4 g/mol
    Application Textile dyeing
    Ph Range 4-6 (1% solution)
    Light Fastness Moderate
    Cas Number 6359-98-4
    Storage Conditions Store in cool, dry place
    Emissive Properties Non-fluorescent
    Melting Point Decomposes
    Ionic Character Anionic

    As an accredited Acid Yellow S-2G factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.

    Packing & Storage
    Packing Acid Yellow S-2G is packaged in a 25 kg sealed fiber drum, featuring a printed chemical label and safety handling instructions.
    Shipping **Acid Yellow S-2G** should be shipped in tightly sealed containers, protected from moisture and direct sunlight. It must be clearly labeled with hazard information and handled according to local regulations. Store in a cool, dry place, and avoid contact with incompatible substances. Use appropriate personal protective equipment during handling and transport.
    Storage **Acid Yellow S-2G** should be stored in a tightly sealed container in a cool, dry, and well-ventilated area away from direct sunlight and incompatible substances such as strong oxidizers. Avoid humidity and keep away from ignition sources. Use secondary containment if possible and clearly label the storage area. Always follow applicable safety guidelines and local regulations.
    Application of Acid Yellow S-2G

    Purity 98%: Acid Yellow S-2G with purity 98% is used in textile dyeing, where it provides consistent shade reproducibility and high color fastness. Solubility 50g/L: Acid Yellow S-2G with solubility 50g/L is used in silk dye baths, where it enables rapid and uniform dye transfer. Light Fastness Grade 5: Acid Yellow S-2G with light fastness grade 5 is used in wool apparel coloration, where it ensures prolonged resistance to color fading under sunlight. pH Stability Range 2-6: Acid Yellow S-2G with pH stability range 2-6 is used in synthetic fiber dyeing, where it maintains color integrity across varying acidic conditions. Particle Size D90 < 10 μm: Acid Yellow S-2G with particle size D90 < 10 μm is used in inkjet printing, where it promotes superior dispersion and print sharpness. Heat Stability up to 120°C: Acid Yellow S-2G with heat stability up to 120°C is used in nylon yarn dyeing processes, where it resists thermal degradation and color change. Molecular Weight 468.4 g/mol: Acid Yellow S-2G with molecular weight 468.4 g/mol is used in leather finishing, where it facilitates deep penetration and even coloring. Salt Tolerance up to 80 g/L: Acid Yellow S-2G with salt tolerance up to 80 g/L is used in reactive dye processes, where it remains stable and minimizes precipitation. Moisture Content <1%: Acid Yellow S-2G with moisture content <1% is used in powder formulation blending, where it improves storage stability and flowability. Chlorine Fastness Grade 4: Acid Yellow S-2G with chlorine fastness grade 4 is used in swimwear fabric dyeing, where it resists discoloration from chlorinated water exposure.

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    Certification & Compliance
    More Introduction

    Acid Yellow S-2G: Raising the Bar for Textile and Paper Dyes

    Real Manufacturing, Real Value

    In the world of colorants for the textile and paper industries, Acid Yellow S-2G stands out because it’s built on decades of chemical know-how and hands-on production experience. In our plant, we see every batch come together, and close quality checks aren’t just slogans—they’re long-standing habits. As the manufacturer, we know every step from raw materials to final packaging because we run the reactors, manage the filter presses, and keep an eagle eye on those drying trays. Each shipment reflects our determination to deliver a reliable product, every time.

    Unpacking the Character of Acid Yellow S-2G

    Acid Yellow S-2G, classified as an Azo dye, provides a deep golden yellow shade for a wide range of industrial applications. Our most common specification clocks in at a consistent strength, thanks to tightly controlled synthesis. This dyestuff finds its natural fit in dyeing wool, silk, nylon, and sometimes paper, especially in cases where clarity and brightness count.

    What’s different about Acid Yellow S-2G isn’t just the color impression or fastness profile. Its hue stays crisp even on substrates that challenge other yellows. We’ve spent years tracking feedback from mill customers and printers, making regular adjustments in our reaction temperatures, salt ratios, and purification routines. That’s why it’s common to see repeat orders for Acid Yellow S-2G from clients who’ve had batch variances with less tightly controlled products.

    Reliability Starts in the Reactor

    We don’t outsource production or depend on third-party blending. The team at our facility runs every phase. This lets us pre-select the quality of key agents—like nitroanilines and coupling components—before the reaction even starts. We get to know each drum of raw material the same way a baker knows batches of flour. By never leaving synthesis to chance, Acid Yellow S-2G emerges with lively color and minimal off-tone byproducts.

    For the technical staff, it’s not about running formulas by rote. They monitor reaction pH readings, watch for early crystallization, and keep water ratios balanced for thorough mixing. Some might say this level of detail borders on obsession, but it produces dye powders that don’t just look good on paper—they work on the mill floor, too.

    Performance in Real-World Conditions

    Factories across the textile and paper landscape don’t have time for unpredictable dyes. If Acid Yellow S-2G gets recommended for a new finishing line, it’s usually because plants know our batches won’t throw unwelcome surprises. The shade intensity remains uniform, and lab tests show good resistance to light and moderate acids. Textiles dyed with this product often meet the deliverable timelines for fashion brands and technical contracts alike. In papermaking, the color registers clearly, even in high-speed production runs, while keeping unwanted tint bleed at bay.

    We see mill operators trust this product in continuous dyeing as well as jigger and jet dyeing machines. Its flow properties allow easy dispersion when added to aqueous baths, minimizing the undissolved specks that can dog other brands. By focusing on manageable particle sizes and clean filtration, each shipment brings peace to process managers looking for uninterrupted systems.

    Safety, Handling, and Environmental Footprint

    Every good manufacturer considers the footprint left by each metric ton sent out the door. Our facility remains committed to keeping heavy metal traces well below regional limits, beginning with supplier selection. By scrubbing exhaust and reclaiming water for reuse, we cut down on effluent load—something European regulators keep pressing manufacturers to address. Regular audits by in-house chemists and external testers keep the standards on track.

    Acid Yellow S-2G flows as a stable powder under standard storage. Most customers report trouble-free storage if the material stays dry and protected from sunlight. We don’t load excess dust suppressants or fillers into the mix, so workers handle what they expect. Beyond regulatory files, our own staff cares about what’s going into their mixing tanks daily, which focuses everyone on real safety instead of just paperwork compliance.

    Decades of Customer Feedback Shape Each Batch

    Papermakers need clean, vivid colors that won’t morph during high-speed conversions. Textile dye houses look for reproducibility from one dye lot to the next, especially as customer expectations climb. Their feedback makes its way straight into our production adjustments. If customers report foam during jet dyeing, we ask the batch records team to review surfactant residuals. When a finisher spots batch variation, we calibrate weighing procedures and solution concentrations.

    Some feedback points at shade drift under specific finishing conditions. We treat this not as a nuisance but as a nudge to revisit purification protocols. Employees who’ve been with us for decades recall how a single call from a paper mill can send the lab team scrambling to optimize filtration routines. It’s an intensive cycle, but it keeps mistakes from repeating and lets reliable batch characteristics emerge.

    Difference That Runs Deeper Than the Label

    Acid Yellow S-2G sits apart from other so-called similar dyes because it sweats the small details. It doesn’t matter whether catalogs list it under the same color index number. We’ve found over time that generic batches from short-run plants often show inconsistent solubility or throw irregular tints on wool fibers. In print rooms, some powders cake badly, which means the operators lose time and money fighting dissolving tanks. Our batches remain free-flowing and easy to work with, even after months of storage.

    Some dyestuffs on the market come with claims that don’t hold under production conditions. While specs and test sheets tell part of the story, nothing beats the sight of a consistent shade panel emerging from a real-world process. Our staff watches these outcomes by forging long-term ties with dyehouses—doing onsite evaluations, helping with recipe tweaks after equipment changes, and responding quickly if an abnormality pops up.

    Tuning Shade for the Chosen Substrate

    Color matching in a textile or paper plant isn’t just a science—it’s an ongoing negotiation with fibers, additives, and even water sources. With Acid Yellow S-2G, operators get a level of predictability that cuts recipe adjustment cycles. The shade leans toward golden-yellow with minimal blue undertones. Whether working on wool, silk, or blended synthetic fabrics, most technicians find minimal need for extra shade-correcting agents.

    For paper plants, the dye integrates easily with sizing agents, which means cleaner finish runs and reduced rework. Our product’s pH range fits modern paper pulping techniques and rarely conflicts with the additives favored by major packaging and printing brands.

    Nylon finishers aiming for bold, uniform hues also see advantages, as Acid Yellow S-2G offers compatibility with the acidic baths and processing conditions favored in that field. It holds up during heat-setting and resists fading better than many direct or basic dyes, which establishes a clear reason for its popularity in demanding coloration jobs.

    Consistency Rooted in Real-World Chemistry

    Production chemists in our facility stick to validated routes, but not out of routine. Every bit of chemical feedstock and auxiliary is checked in the lab—by people who started their careers at the workbench, not on a spreadsheet. Tight control over process water, pressure, and dosing means less batch-to-batch fluctuation. During blending, powders are worked in ribbon mixers that our team maintains and calibrates each season.

    Every lot of Acid Yellow S-2G is labeled and stored to shorten the journey to our test floor. Our practice includes dyeing small textile swatches and paper panels with every batch, just as our customers do in their own testing labs. If a color panel lifts off-shade or shows dullness, the lot doesn't get packed. That level of internal trialing reflects the reality: real-world applications are never 100% by-the-book.

    Ease of Use Means Fewer Plant Headaches

    Whether introducing Acid Yellow S-2G into a legacy finishing line or a new automated system, operators appreciate how quickly powder dissolves and moves through lines with no sludging or clogging. This allows greater flexibility and fewer delays, saving costs for both the dye house and the end customer. Sourcing issues rarely crop up because we keep a solid inventory buffer, giving buyers certainty about lead times, even during supply chain disruptions.

    We tune particle size via our in-house milling setup, reducing the risk of unsightly specking or streaking in high-speed printing and dyeing. Our batches leave little residue on filters and pump screens. Package integrity—often overlooked—is something we pay attention to as well, using materials that shield against humidity and ever-present dust during shipment.

    Responding to Evolving Demands

    Regulations and end-user requirements shift every year. New environmental standards press manufacturers to pull back on certain auxiliaries or tweak process conditions. We’ve worked ahead of the curve by running our own environmental tests and removing suspect ingredients well before market pressure hit. Internally, our teams track every policy update and feed this knowledge into raw material procurement and quality control.

    With sustainability in mind, our approach focuses on closed water cycles, low-dust handling setups, and batch traceability so customers get up-to-date compliance documentation. These efforts aren’t about checking boxes for certifications—they ensure our people, community, and clients stay confident in what we deliver.

    Addressing Common Headaches in Dyeing and Finishing

    Plant managers, buyers, and color technicians often mention how a supposedly small change in dye supplier triggered adjustments in recipes, retesting, or even process downtime. While some believe dyes are commodities, those closely involved know that particle size consistency, color purity, and storage behavior matter deeply, especially when client deadlines loom.

    We address these points not by promising one-size-fits-all solutions but by tracking each pain point to its source—whether in the synthesis step or downstream handling. The hands-on production model we use maintains transparency and lets clients discuss issues directly with factory technologists.

    If a dyehouse picks up unexpected staining or instabilities during full-scale production, they reach out and find a real chemist on the line, not a distributor reading from a script. This creates an environment where changes aren’t viewed as setbacks but as critical learning opportunities that constantly improve our line.

    Looking Ahead with Confidence

    Decades in chemical manufacturing teach hard lessons about the long-term impacts of shortcuts and fair-weather quality controls. For Acid Yellow S-2G, consistent feedback from major brand converters pushes us toward continuous improvement, not just maintenance of set procedures. We keep technical teams out in the field and bring their findings back to our plant, supporting adjustments that improve both our dye and its fit within evolving manufacturing contexts.

    Ongoing investments in secondary containment, emission controls, and data logging go beyond external requirements. They help us spot issues first, stay within increasingly strict norms, and maintain the trust that customers and regulators extend every season.

    No Substitute for Genuine Manufacturing Experience

    Acid Yellow S-2G owes its reputation not to marketing narratives but to lived manufacturing experience. Day in and day out, plant chemists test, tweak, and refine based on outcomes at actual customer sites. Our openness with feedback, willingness to change process details, and ability to keep direct lines of communication show up in every kilogram shipped.

    From the reactor control room to plant delivery bays, commitment doesn’t waver. Our goal remains the same: produce a yellow dye that sets standards by consistency, stays reliable under pressure, and evolves with the needs of both industry partners and regulatory climates. As longtime manufacturers, we know shortcuts don’t hold up in the real world. Each batch of Acid Yellow S-2G leaves our hands as a direct result of that philosophy.

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