|
HS Code |
502398 |
| Product Name | Acid Brown PRS |
| Color Index Number | Acid Brown 75 |
| Appearance | Brown powder |
| Solubility In Water | Soluble |
| Chemical Class | Azo dye |
| Molecular Weight | Approx. 600 g/mol |
| Ph Value 1 Percent Solution | 2.5-4.0 |
| Application | Textile dyeing (wool, silk, nylon) |
| Light Fastness | Moderate |
| Storage Conditions | Cool, dry place |
| Melting Point | Decomposes before melting |
| Cas Number | 68236-00-2 |
| Form | Powder |
| Recommended Dosage | Varies by substrate, typically 1-3% |
| Stability | Stable under normal conditions |
As an accredited Acid Brown PRS factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Acid Brown PRS is packaged in a 25 kg net weight fiber drum with an inner polyethylene liner, clearly labeled for identification. |
| Shipping | Acid Brown PRS is shipped in tightly sealed, properly labeled containers to ensure safety and product integrity. It is transported as a non-hazardous material but should be handled with care to avoid spills. Store and ship in a cool, dry place, away from incompatible substances and direct sunlight. |
| Storage | **Acid Brown PRS** should be stored in a tightly sealed container, away from moisture and direct sunlight, in a cool, dry, and well-ventilated area. Ensure the storage area is separate from incompatible substances such as strong alkalis and oxidizing agents. Properly label the container, and avoid excessive heat or ignition sources to maintain chemical stability and safety. |
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Purity 98%: Acid Brown PRS with a purity of 98% is used in textile dyeing, where it ensures high color yield and uniform shade development. Molecular Weight 450 g/mol: Acid Brown PRS of molecular weight 450 g/mol is applied in wool fiber dyeing, where it provides excellent fiber affinity and penetration. Light Fastness Grade 5: Acid Brown PRS with light fastness grade 5 is utilized in nylon fabric coloring, where it offers prolonged color retention under exposure to sunlight. Solubility 60 g/L (at 40°C): Acid Brown PRS with solubility of 60 g/L at 40°C is used in silk dyeing baths, where it enables rapid and complete dissolution for efficient dye uptake. Particle Size D90 < 25 µm: Acid Brown PRS with particle size D90 less than 25 µm is used in ink manufacturing, where it ensures smooth dispersion and homogeneous color distribution. Stability Temperature 120°C: Acid Brown PRS stable at 120°C is used in high-temperature dyeing processes, where it maintains color integrity and prevents degradation. pH Stability Range 2-6: Acid Brown PRS with pH stability from 2 to 6 is used in leather staining applications, where it delivers consistent hue and avoids color shifting under acidic conditions. Viscosity 4 mPa·s (aqueous solution): Acid Brown PRS with viscosity of 4 mPa·s in aqueous solution is used in paper coating formulations, where it offers optimal flow and even coverage. Melting Point 210°C: Acid Brown PRS with melting point 210°C is employed in heat-set printing processes, where it resists thermal breakdown and retains chromatic strength. |
Competitive Acid Brown PRS 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
Email: admin@ascent-chem.com
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Creating Acid Brown PRS draws on decades of hands-on chemistry. Unlike many generic acid dyes that flood the market, we manufacture Acid Brown PRS according to a proprietary process, maintaining batch-to-batch consistency and solid granularity. Over the years, customers from the textile, leather, paper, and wood dyeing sectors have shaped the way we design, purify, and evaluate the product. We don’t treat Acid Brown PRS as a commodity: it is a focal product here. Every ton that leaves our plant carries a fingerprint of what we’ve learned working with real-world users.
Our Acid Brown PRS shows a rich, stable hue with excellent fastness properties on protein fibers and polyamides. The standard model contains a brown 98 or 2RL component, granular or powder form depending on production line needs. Actual composition reflects careful control over particle size and salt content, which keeps re-dissolving quick and prevents nozzle clogging—even after extended storage. Most orders fall within a strength range above 100%, measured by direct spectrophotometric comparison, rather than relying on historical figures carved out decades ago.
Technical teams use spectroscopic and chromatographic testing to confirm every batch. Moisture stays under 5%. Foreign odorous compounds, residues from feedstocks, and extraneous contaminants are fully filtered out before shipping. There’s never been any incentive to water down specifications since our reputation ultimately comes from plant managers and dyehouse operators who see results under actual production conditions, not lab-perfect environments.
To understand Acid Brown PRS, it helps to see what goes into its manufacture. Dye performance begins with the choice of naphthol and diazo raw material, as well as accuracy in the sulfonation and coupling steps. Low-grade raw materials lead to shifting tones, increased foaming, and fading during wash tests. The incoming supply chain is tightly monitored, both for chemical strength and for impurities. A single out-of-spec input can jeopardize hundreds of kilograms. Workers on our lines are quick to flag unusual viscosity or off-shade filtrate, even before formal testing picks it up.
Waste minimization is another serious concern. Modern batch reactors save solvent, and improved recovery systems allow much of the process water to be reused. These aren’t just cost-saving moves—they directly reduce the risk of cross-contamination. Taking shortcuts at this stage results in unpredictable dye content, which no downstream filtration completely corrects. Our senior chemists train every new technician to watch for early warning signs and take immediate action.
Lifetime dyers remember the headaches that come with unstable browns: unlevel dyeing, rapid shade drift during pad-steam, or slow strike rates on wool blends. Acid Brown PRS uses a well-controlled sulfonic acid profile, making it easily dispersible and quickly exhausted onto fibers, while keeping migration low. It handles retarder use much better than earlier-generation browns, which helps avoid streaking on high-speed jets. Textile operations report strong penetration and resilience through repeated washes, even when handling finicky synthetics or viscose blends.
In the paper and leather finishing industries, Acid Brown PRS offers simple solubility and consistent outcome, so operators spend less time troubleshooting patchy results or uneven saturation. For specialty woods, the dye adheres deeply without bleeding or excess raising of the grain. Since colorists often adjust pH or additive load on the fly, our formulation tolerates a wide range of auxiliaries, salts, and emulsifiers used in the field.
Environmental compliance changed the way dyes get made. Long before regulations began tightening, we audited our intermediates for regulated amines and persistent organics. Acid Brown PRS gets tested down to parts-per-million for Restricted Substances List compliance and for wastewater treatability. Because we control every step from synthesis to drying, we guarantee absence of banned aromatic amines, meeting requirements for OEKO-TEX and EU REACH certification.
Customers working toward GOTS or bluesign standards also check our material safety disclosures. We issue periodic third-party tests and regularly update our process to stay ahead of changing compliance benchmarks. Each modification to Acid Brown PRS gets scrutinized not for marketing value but to ensure it keeps pace with environmental health criteria worldwide.
Acid Brown PRS parts ways with generic browns in two big areas: batch consistency and application flexibility. Many large producers focus mostly on scale; they blend remainders, obscure batch history, and dilute active content to shave costs. Such practice results in fluctuating color and unpredictable fastness, a fact any experienced dyeing supervisor will recognize.
Because every batch of Acid Brown PRS comes from a single controlled process and not multiple feeders, shade stays remarkably steady, with a deviation of less than 1% in the CIELAB axis for most orders. Packing is standardized for high-flow requirements—free of dust, clumped product, or caking. Production responds to order sizes, so both small-lot and bulk users receive the same quality level.
The product also resists common blending faults. Our controlled granulation eliminates hidden undispersed lumps, a key issue when dye is suspended directly in high-shear processes or in tank pre-mixes. Some competitors increase inorganic filler or add stabilizers for cost reduction; Acid Brown PRS remains largely filler-free, resulting in strong lift and sharp, clean tone on every substrate.
End-users seldom have the luxury to stop a production line due to dye faults. When a shipment of uncontrolled acid brown arrives, teams scramble—tweaking temperature, raising retarder, adding salt, or even draining dyebaths to remedy off-shade results. We have worked side by side with several large dyehouses who moved to Acid Brown PRS after years of these issues. Managers reported not just better output but measurable time saved on rework and dye correction.
Our own technical team visits production sites every month, often running side-by-side trials against in-market alternatives and competitor samples. A common story emerges: users see higher exhaustion rates, cleaner drainage during rinsing, and less foaming with our brown. Wastewater treatment technicians frequently remark on easier COD management, as the batch produces far less foam or dye shell residues. This is not simply a packaging claim—it's built on regular shop floor experience.
Industries today shift rapidly, deploying new machinery, digital color matching, and tighter scheduling. Acid Brown PRS is ready for continuous dyeing lines, rotary drum machines, and modern batchwork alike, without requiring major process overhaul. We collaborate directly with process engineers to discover bottlenecks and fine-tune the dye so it stays robust as production expectations change.
The move to lower temperatures and greener chemistry pushes the need for higher exhaust rates and stable color life. Our brown dye shows high affinity even under cold initial liquors or rapid infeed, allowing for shorter cycle times and lower rinse needs. Such traits are not theoretical—they come from active trialing, and feedback from operators who measure results directly on the job.
Staining and uneven migration under heavy load rank as ongoing headaches. To address persistent shading and patchiness, we engineered the salt and dispersing agent profile in Acid Brown PRS. Operators running wool and polyamide blends noticed a sharp drop in unlevel finish and less need for corrective aftertreatment. Those running recycled fiber lines highlighted the dye’s tolerance to variable water chemistry—a result of ongoing tweaking in our process labs to reflect conditions far outside city-center dyehouses.
Another regular problem: dye dust exposure and spillage during transfer. Our team shifted to more compact packaging with moisture barrier linings and anti-static coating, reducing open transfer risk and keeping airborne particulate to a minimum. Warehouse teams now report higher storage stability and easier load handling, often raising directly with us how this translates into smoother workflow and lower staff exposure risk.
We see process and product as one whole—refining Acid Brown PRS never truly stops. Each shipping lot invites new feedback, whether through formal performance audits or a single phone call from a site technician. Larger customers sometimes install our bench chemists side-by-side with dye operators for two to three months to optimize settings, review faults, and resolve unique process challenges. These relationships shape the next generation batches.
As the demand for transparency grows, we now offer digital COA access and full traceability by production lot. Plant managers track every Acid Brown PRS drum from origin to end use, building confidence and fast support whenever troubleshooting arises. We also maintain historical blending data to allow users switching from old standard browns to make cross-references easily. Our database flags any component or performance change, allowing colorists to validate their libraries and help avoid surprise shade drift.
Many dyers, under pressure from procurement, still opt for low-priced browns marketed with inflated content or exaggerated fastness claims. These short-term savings often unravel, as delivered shade rarely matches sample or batch, requiring excessive correction with solvents or auxiliary color. Acid Brown PRS finds its way into plants where line engineers look beyond price point alone and push for proven yield per kilogram.
We don’t chase the lowest price bracket. Our focus remains on predictable, right-first-time results, knowing this lowers total process cost, reduces chemical waste, and avoids resource-intensive washing or draining. That is why plant supervisors repeatedly turn to us to supply their mission-critical brown dyestuff instead of risking unpredictable alternatives.
Unlike many producers, we keep technical experts available to consult on process problems and to listen—actively—to user experience. Customer input led to current improvements in pH buffer stability, anti-settling agent ratios, and final-stage particle finishing. Several customer-driven improvements came not from supervisory feedback, but from machine operators and warehouse staff who caught issues unnoticed in QC alone.
Direct contact helps us maintain product purity and batch reproducibility. New customers often come via direct referral: a neighboring plant manager observes performance gains and reaches out for test lots. We share real-world plant stories and technical fixes learned from the field, not just lab protocol, so new users join a knowledge network and not just a supplier pipeline.
The global dye market pulls in two directions: rising demand for authentic, high-repeatability colors and increasing regulatory scrutiny. Acid Brown PRS addresses both by keeping the blend clean, limiting hazardous residues, and sticking to formulations that handle real-world complexity—not just predictable lab environments. We invest in modern analytic tools and outside verification—not to chase certificates, but to answer real customer audits.
We anticipate tighter rules surrounding microplastics, heavy metal residues, and persistent coloration in downstream water. Our development team began mapping alternatives to current auxiliaries in anticipation of even tougher import checks. These advances aren’t driven internally—they reflect questions and requirements passed directly from production partners, brand auditors, and sustainability managers. Innovation never stands apart from what operators require at the line.
Building Acid Brown PRS required more than chemistry: it took a relationship with the people who use the dye every day. Our approach marries hands-on technical innovation with rigorous internal standards and continuous operator feedback. Each batch produced stands as a reflection of what the user expects in real-life: repeatable, direct, and reliable performance. We work closely with process engineers, colorists, plant technicians, and warehouse teams to refine the product beyond any specs that appear on a data sheet.
Production team at our plant comes from decades of problem-solving with industry veterans. They see firsthand how every packing, blending, and filtration decision influences customer success. Acid Brown PRS is more than a formula—it is a sum of learning from production partners, constant re-evaluation, and a willingness to adapt as challenges change. We remain committed to supporting customers with not just product, but ongoing technical advice and rapid collaboration whenever new application questions arise.
Our future plans for Acid Brown PRS include building partnerships with industry users, expanding tailored support, and sharing advances as they occur. The pathway to the best dye isn’t fixed; it evolves through constant listening and engagement with those who put the material to work on real production lines, every day.