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HS Code |
476256 |
| Product Name | Acid Yellow GR |
| Color Index | Acid Yellow 36 |
| Cas Number | 587-98-4 |
| Chemical Class | Azo dye |
| Molecular Formula | C18H14N3NaO3S |
| Appearance | Yellow powder |
| Solubility | Soluble in water |
| Ph Range | 4.0-5.0 (1% solution) |
| Application | Textile dyeing (wool, silk, nylon) |
| Maximum Absorption Wavelength | 412 nm |
| Light Fastness | Moderate |
| Storage Conditions | Store in cool, dry place |
| Synonyms | C.I. 13065, Acid Yellow 36, C.I. Acid Yellow GR |
As an accredited Acid Yellow GR factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Acid Yellow GR is packaged in a 25 kg net weight fiber drum, featuring a sealed inner plastic liner for secure storage. |
| Shipping | Acid Yellow GR is shipped in tightly sealed, labeled containers such as fiber drums or plastic barrels to prevent contamination and moisture exposure. During transportation, it must be kept dry and stored in a cool, ventilated area, away from incompatible substances. Proper documentation and handling procedures ensure compliance with safety regulations. |
| Storage | Acid Yellow GR should be stored in a cool, dry, and well-ventilated area, away from sources of heat, ignition, and direct sunlight. Keep the container tightly closed when not in use. Store separately from incompatible substances, such as strong oxidizing agents. Ensure proper labeling and use corrosion-resistant containers. Avoid contact with moisture to maintain product stability and prevent clumping. |
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Purity 98%: Acid Yellow GR with purity 98% is used in textile dyeing, where it ensures consistent and vibrant color yield. Molecular Weight 401.37 g/mol: Acid Yellow GR with molecular weight 401.37 g/mol is used in silk dyeing, where it provides uniform color penetration. Stability Temperature 120°C: Acid Yellow GR with stability temperature 120°C is used in wool dyeing processes, where it maintains color stability during high-temperature washing. Solubility in Water 50 g/L: Acid Yellow GR with solubility in water 50 g/L is used in paper coloring, where it allows for fast dissolution and even color application. Particle Size D90 < 20 µm: Acid Yellow GR with particle size D90 less than 20 µm is used in leather coloration, where it achieves smooth and streak-free dye coverage. pH Range 4-6: Acid Yellow GR with pH range 4-6 is used in ink formulation, where it delivers optimal color brightness and print sharpness. Light Fastness Grade 4: Acid Yellow GR with light fastness grade 4 is used in nylon fiber dyeing, where it offers improved color retention under sunlight exposure. Melting Point 210°C: Acid Yellow GR with melting point 210°C is used in pigment manufacturing, where it enables thermal processing without decomposition. |
Competitive Acid Yellow GR 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.
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Tel: +8615365186327
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Working on the manufacturing floor, you get to know Acid Yellow GR not as a commodity, but as a result of years of effort spent fine-tuning the chemistry behind it. Our teams handle each batch with a clear understanding of what downstream users expect—consistency, colorfastness, and a shade profile that stands up in a competitive marketplace. Acid Yellow GR remains in high demand because it meets a genuine need in the textile and leather industries. Years invested in process optimization have taught us what works and what doesn’t, helping us avoid pitfalls that new producers often encounter.
Unlike trading houses who see only the invoice and delivery slip, we see the defining differences between lots straight from the reactors. Acid Yellow GR’s hue strength, purity level, and solubility outcomes draw from the actual chemistry—raw material selection, reaction control, and purification steps. Our finished product typically offers a content level above 95%. We achieve this by monitoring intermediate formation, pH adjustments, and washing procedures throughout the production cycle. Through repeated daily testing, we reach a low level of insoluble matter—critical for processes like printing, where any residue or fiber speck can ruin a finished fabric or batch of leather.
Customers in dyehouses are not just choosing a color from a chart. They’re betting on uninterrupted operations, fewer re-dyes, and deep color penetration into fibers. Acid Yellow GR solves problems that other yellow dyes often create. Our dye’s performance under acid conditions makes it highly compatible with wool and nylon, where it creates strong shades with even tonality. Unlike direct dyes, Acid Yellow GR resists washing out, even after multiple launderings. For silk, this dye delivers brightness without overflow, minimizing stain risks on white areas during patterning or screen printing. Day in and day out, our customers confirm that their end products display a shade consistent with sample, proving the reliability achieved through hands-on manufacturing oversight.
In the field, formulators can tell when they’re working with a dye batch that has not been thoroughly purified. Undesired side-products or residues lead to unpredictable results, staining, or difficulty achieving the specified chromatic strength. Our Acid Yellow GR attains high reproducibility by maintaining control during diazotization and coupling, two crucial reactions that define the shade and stability. We use standardized raw material batches, keeping metal impurities to a minimum, which helps eliminate off-odors or color drift during dyeing. Quality control staff take fresh sample runs from every reactor batch and match them against internal color standards using spectrophotometers to ensure spectral purity, not just subjective visual checks. Competitor dyes sometimes fall short on wet fastness or give yellowing during light exposure, while our in-process UV stability controls support end products with real staying power.
Years ago, we encountered issues with inconsistencies between dye lots, which caused some downstream users to experience patchy results. We traced these problems back to small procedural variances—one technician adjusting pH a bit high, another washing for five minutes longer than the batch guideline. Tightening controls at each step, and providing ongoing technician training, allowed us to address these points. Installing automated dosing and minimum agitation thresholds also contributed to more uniform dye particle size, which translates to easier dispersion in dye baths. These technical improvements made a difference not only to the lab analyst but also to the dyer on the shop floor, who now spent less time troubleshooting and more time producing finished goods.
Manufacturing dyestuffs brings real environmental responsibilities. Our site’s wastewater treatment handles the spent liquor, ensuring byproducts and color bodies meet legal limits before discharge. Handling an acid dye such as Acid Yellow GR means being vigilant about employee exposure and ensuring good containment procedures. We conduct regular air sampling and provide proper PPE, knowing that safety standards safeguard our workers and the community. Our ongoing R&D is moving toward lower-salt-process formulations, which will cut effluent volumes for our customers and ourselves. In a sector often criticized for environmental harm, our goals center on measurable reductions in energy use and improved recycling of process water.
Manufacturers and printers using our Acid Yellow GR often mention the lower rate of rework and less waste output compared to previous dye sources. Silk printers share stories of pieces passing colorfastness tests the first time, with minimal shade drift—even on demanding color blocks. Textile dyers say that the strong affinity of Acid Yellow GR enables single-bath dyeing of blended materials, lowering the chance of uneven uptake between fibers. Some reported improvements in process timing, noting that the dye’s high solubility at working temperatures made preparation easier, especially on older equipment where complete dissolution can be a challenge. Leather finishers appreciate that the dye does not bleed onto hardware or linings, making it suitable for bags, gloves, and fashion footwear.
Even within the acid dye family, product performance can vary widely. Acid Yellow GR differs from standard Acid Yellow 36 or Acid Yellow 49, which tend to display duller shades or shorter fastness profiles. Where other dyes might create muddy mixtures in custom blends, our Acid Yellow GR maintains sharp, clean hues when mixed with reds, blues, or blacks. Some users note that cheaper alternatives create problems under routine sunlight exposure, leading to fading. Our dye’s enhanced UV and wash fastness, refined through years of formulation feedback, come from incremental process upgrades—not just updated paperwork. The purity of the final product gives our dye strong compatibility with optical brighteners, often used in high-end textiles seeking bright whites alongside vivid yellows.
In a highly price-competitive market, any inefficiency or batch failure hits not only the direct buyer but also their brand reputation. Since every defect translates to extra cost or dissatisfied customers, reliable intermediates matter. Acid Yellow GR’s predictable reactivity and even coverage reduce the need for overdosing or remedial processing. This translates to real power savings in dyehouses. We have seen cases where customers reduced steam usage and narrowed process windows, which wouldn’t be possible with inconsistent dye lots. Our most reliable partners learned that good material up front cuts costs and downtime, which keeps them competitive despite tight margins.
Nearly all major buyers demand compliance with REACH or similar regulations, particularly in Europe. We openly share analytical and compliance documentation, allowing smooth customs clearance and confidence for downstream audits. Experience taught us to prepare test samples with various fiber types, confirming the color development matches not only synthetic but also natural substrates. Some markets require extra assurance for food or skin contact; in those instances, our QC team manages trace analysis for unwanted aromatic amines or trace metals, supporting broader customer needs. Our willingness to adapt documentation to overseas buyers shows the value of direct manufacturer knowledge over generic trading documentation.
As consumer taste shifts, so do requirements for new shades and hybrid dye formulations. Researching with major mills and printers, we’ve developed derivatives of Acid Yellow GR that fine-tune undertone and increase compatibility with digital textile printing. Rigorous trialing on pilot ranges and working with independent color consultants encouraged us to optimize the granulation to improve dust suppression, which matters for health and batch accuracy. As digital textile printing takes off, and short runs become the norm, our ability to provide consistent micro-batches—rather than only bulk—is becoming a game changer for boutique brands.
Like anyone in chemicals, we face volatility in raw material costs and shifting regulations. We respond by investing in on-site testing equipment and continuous training for our operators. Our approach favors building in stability, rather than chasing process tweaks post-failure. We participate in dye industry forums, sharing our findings and troubleshooting persistent problems, such as compatibility with modern eco-friendly mordants or non-traditional substrates. Listening to customer complaints—whether from large dyehouses or local workshops—leads to fine adjustments and open lines of communication. We know that lasting business rests on trust earned through repeated proof that our dyes deliver what we promise.
Standing at the intersection of chemistry and manufacturing reality, those who produce Acid Yellow GR see it as much more than powdered pigment. Years spent tracking down impurity causes, overseeing batch records, and seeing finished fabric leave the factory make one thing clear: consistency, attention to safety, and respect for downstream users cannot be faked. We have built up our business by refusing shortcuts, knowing that our product quality directly affects livelihoods outside our walls. Technicians work every shift ensuring the dye reacts and purifies out to the right standard. Supervisors scrutinize every test result. Every feedback call from an end user is logged, checked, and traced to process points—so no complaint goes ignored and improvements reach the next production run.
Our role as an originator—rather than as a broker—brings unique perspective. We understand the pressure on processors to limit downtime. Unwanted outcomes like speckling, batch unevenness, or off-shade finishes directly harm their production. The reliability of Acid Yellow GR, consistently proven over years and thousands of tons shipped, springs from our fixations with traceability and practical solutions. Rather than pushing volume above all, we live with the consequences of our choices—positive or negative—every day via customer returns, in-plant checkups, and trend analysis.
The chemical industry evolves constantly, driven by customer expectations, new techniques, and updated legal frameworks. We adapt by sustaining investment, insisting on quality training, and learning from every mishap or success. That integrity builds confidence—not only for buyers but for their end users, who rarely see our name but always experience our product’s effect. By taking responsibility and staying hands-on with Acid Yellow GR from raw material to shipment, we reinforce trust through every interaction. In this way, we remain not just a supplier, but a dependable partner shaping the standards and success of modern dyeing operations.