Acid Black ET

    • Product Name: Acid Black ET
    • Alias: Black 210
    • Einecs: 257-789-8
    • 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

    260105

    Product Name Acid Black ET
    Chemical Class Azo dye
    Appearance Black powder or granules
    Color Index Number CI 20470
    Solubility Soluble in water
    Ph Range 2-5 (in solution)
    Usage Textile dyeing (mainly wool, silk, nylon)
    Molecular Formula C20H13N5Na2O10S2
    Light Fastness Moderate
    Application Method Acid dyeing process
    Toxicity Moderate, avoid inhalation and skin contact
    Storage Conditions Keep in cool, dry place
    Cas Number 1064-48-8

    As an accredited Acid Black ET factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.

    Packing & Storage
    Packing Acid Black ET is packaged in 25 kg high-density polyethylene woven bags, lined with inner plastic for moisture protection and safety.
    Shipping **Shipping Description for Acid Black ET:** Acid Black ET is shipped in tightly sealed, labeled containers to prevent leakage or contamination. It should be transported as a non-hazardous dye in compliance with local regulations. Store in a cool, dry place, and protect from direct sunlight and moisture during transit to maintain product integrity and safety.
    Storage **Acid Black ET** should be stored in a cool, dry, and well-ventilated area, away from direct sunlight, heat sources, and incompatible substances such as strong oxidizers. Keep the container tightly closed when not in use to prevent moisture absorption. Ensure the storage area has appropriate spill containment measures and is clearly labeled. Use only corrosion-resistant materials for shelves and containers.
    Application of Acid Black ET

    Purity 98%: Acid Black ET with a purity of 98% is used in textile dyeing, where it ensures deep coloration and high shade reproducibility. Molecular weight 650 g/mol: Acid Black ET of molecular weight 650 g/mol is utilized in leather finishing, where it enhances penetration and uniform dye uptake. Stability temperature up to 120°C: Acid Black ET with stability temperature up to 120°C is applied in wool fiber dyeing, where it maintains color stability under elevated processing temperatures. Particle size <10 µm: Acid Black ET with particle size less than 10 µm is used in ink formulation, where it provides smooth dispersion and high print definition. Water solubility 60 g/L (at 25°C): Acid Black ET with water solubility of 60 g/L at 25°C is used in paper coloring, where it ensures consistent flow and even application on paper surfaces. Melting point 210°C: Acid Black ET with a melting point of 210°C is incorporated in synthetic fiber dyeing, where it prevents decomposition and preserves dye integrity during heat setting. pH stability range 2–6: Acid Black ET with pH stability range 2–6 is used in acid dye processes, where it guarantees consistent shade and performance under acidic conditions. Light fastness grade 5: Acid Black ET with light fastness grade 5 is used in carpet manufacturing, where it offers prolonged resistance to fading from sunlight exposure. Viscosity (10 mPa.s at 25°C): Acid Black ET with viscosity of 10 mPa.s at 25°C is used in liquid dye preparations, where it ensures easy handling and optimal mixing.

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    Certification & Compliance
    More Introduction

    Introducing Acid Black ET: Built from Experience, Tailored for Results

    Acid Black ET – A Choice Rooted in Real Manufacturing

    Acid Black ET, known in the industry by its solid reputation, represents the result of years on the shop floor, countless formulation batches, direct dialogue with end-users, and a continuous push for finer, richer black shades. We have poured decades of technical refining into this dye. With a keen eye for practical results, every keg and drum reflects our own process know-how and field learning. The Acid Black ET that leaves our floor is more than a chemical. It is the conclusion of repeated real-world testing, plant-led improvements, and drive to offer reliable performance in every bag.

    About Acid Black ET – What Sets Our Grade Apart

    Our factory’s Acid Black ET carries a model profile refined through direct use and re-testing by textile dyers and leather finishers, alongside feedback from paper, nylon, and silk processors. Each batch of Acid Black ET achieves consistent coloring strength, reliable solubility, and suitability for large-scale production runs. This black dye is most often available in powder form, offering practical handling and straightforward measurement for technicians and line workers. The powder's choice comes from real-life workshop preferences: less dust, no caking, and easy addition to aqueous systems.

    Acid Black ET’s strength reveals itself not just by hue, but through its deep shade in dilute solutions, clear finish after wash-off, and strong affinity for both protein and polyamide fibers. Once introduced into an aqueous dye bath, Acid Black ET dissolves at working temperatures without the formation of flakes or lumps. Careful particle size control avoids filtration issues, leading to faster, cleaner preparation, and a dye bath that performs predictably batch after batch.

    A Manufacturer’s Experience: Sourcing, Mixing, and the Importance of Consistency

    In daily operations, subtle differences in raw material sources and process tweaks show up in the final lot. That’s why we stick to quality-checked suppliers of core intermediates. Our synthesis line does not chase lower costs at the expense of repeatability. The dye content, pH, and salt content for Acid Black ET are monitored every cycle. Off-ratio batches don’t pass. Over the years, our team has adjusted filtration, water choices, and even reactor geometry to reduce the kind of micro-contamination that leads to off-shades or residue bleeding late in dyeing steps.

    Unlike black acid dyes that show excessive migration or only hit deep black at elevated acidity, Acid Black ET walks a balanced line. Its color build-up remains steady across pH 4–5.5, matching what many textile plants already use in their recipes. Even as trade-offs must be made—speed vs. depth, color vs. cost—Acid Black ET holds its shade with repeated washings, a result that saves headaches not just at the production line, but also with final customers who demand colorfast goods.

    Applications: Textiles, Leather, and Beyond

    Real-world use goes far beyond test tube promises. In the textile sector, we load Acid Black ET into acid dye baths to pull uniform jet-black shades on wool, nylon, and blends for apparel, carpet, and accessories. In the finishing of garment leather, we have found this dye builds a crisp, neutral-to-blue black with no unsightly bronze cast seen in cheaper acid blacks. Print houses rely on the powder to color specialty papers that require lightfastness and clear-cut lines, since uneven bleed makes for rejected lots.

    Apparel brands come to us for doses that ensure reproducible blacks season after season. Yarn dyeing houses prefer Acid Black ET for its handling in open kettles and pressure vessels. Bulk dyehouses push hundreds of meters through jet systems and face little rework thanks to the dye’s resistance to shade drift. Real leather tanners have commented that the dye stands up to their aggressive retanning cycles. And it is not just big names seeking our powder—small batch printers appreciate the absence of settling and the velvet finish the dye imparts to decorative paper and ribbon products.

    Our Team's Real-World Challenges – And How Acid Black ET Continues to Improve

    Making chemical dyes in the real world rarely goes exactly as planned. We have seen how a hot, humid production floor can introduce clumping in inferior grades. Our solution involved managing humidity in our packaging areas so every packet flows. In response to rising demands for tighter color tolerance, we shifted to in-line spectrophotometric quality checks. If a lot veers as little as 0.2 on a colorimeter, it does not ship.

    Once, textile mills using a standard acid black reported under-extraction issues and ring markings during package dyeing. By listening to these pain points, we adjusted our Acid Black ET’s particle size and pre-milled it more finely. Today, our customers report no shadow bands and faster uptake. We have also responded to pressure from stricter wastewater standards by optimizing our synthesis for lower inorganic salt content, trimming rinsing cycles for users who face regulatory discharge limits.

    What Sets Acid Black ET Apart from Other Candidates

    On paper, black acid dyes share many traits. In use, key differences show up after hundreds of kilograms and meters of goods pass through your vats. Many cheaper imports develop surface dust and unwanted haze in working solution, clogging filters and leading to headaches. Our team has prioritized physical finish for easier handling and real throughput gains. Years of in-house testing and customer feedback convinced us to push paste-model batches, but our dry powder grade outperforms for storage stability and predictability under variable climate.

    In comparison to Acid Black 194, Acid Black ET avoids reddish undertones, providing a pitch-black that leans slightly blue, which end users in the garment segment call true black. Against Acid Black 172 or 210, our ET model delivers deeper build-up at similar dye dosages—this means less product is wasted and greater color depth appears even on synthetic blends. For silk, a notoriously demanding substrate, Acid Black ET’s solubility profile and purity prevent the streaking and ring-out visible with budget acid dye types.

    A Word on Safety, Traceability, and Customer Support

    In our plant, every drum of Acid Black ET tracks back to a full run record—down to which operator managed the reactor, which micro-lot of raw material was charged, and what parameters were logged every hour. This allows our technical team to answer clients quickly if questions come up on color consistency, unexpected residues, or certificate needs. Regular outside audits and third-party physical confirmations add a check beyond our in-house controls.

    Our team stays available to troubleshoot with factory dyers, not just sell shipments. If a customer faces foaming, precipitation, or compatibility puzzles, we troubleshoot inside our tech lab and report findings back directly. We share handling advice we’ve gained from our own production and from the thousands of communication hours with real operators who prefer practical, honest guidance over sales talk.

    Sustainability, Regulation, and Looking Ahead

    Environmental regulations change the ground beneath any chemical manufacturer. Acid Black ET now leaves our line with minimal residual free acid, lower salt, and a tighter specification for heavy metals after years of gradual process change. We listened to a growing segment of textile exporters who came under OEKO-TEX and REACH pressure, supporting them as they transitioned to dyes that answer stricter eco-audit requirements. All ongoing changes source not from marketing demands, but from on-the-ground audits, soil and water tests, and hearing from customers who must prove discharge is clean.

    We openly share updated compliance statements where needed, cut redundant plastic packaging, and provide product in weights suitable both for large and small production so users can avoid over-ordering and waste. We also engage in regular internal discussions on process water recycling, solvent recovery, and energy saving, recognizing our responsibility as a direct maker, not just a packager or trader.

    Field Feedback: Why We Continually Tweak and Improve

    A product like Acid Black ET does not grow stale under the push and pull of market feedback. Clients in different regions highlight different pain points. For some, it’s dye bath stability at elevated temperatures. For others, it’s the demand for sharp, non-bronze black on chrome-free leather. Requests for better solubility, less dust, and finer control on shading have guided us. Each batch is a test bench for the next improvement. Success builds not from perfecting a formula once, but listening to every complaint and compliment, and taking the lesson back to our chemistry line.

    Competitive chemistry is never static. Other manufacturers also chase better black dyes. Yet cheap imports tend to drift in shade after long storage, or under humid warehouse conditions. We invest in stabilizers—not just the bare minimum for shipment, but at levels that protect color and shape, even after months on shelves, because we have seen what happens when storage gets rough, or climate control fails.

    Feedback from paper and nylon mills has steered us to tune filtration sequences and keep the product easier to work with. At every yearly review, we sit down with plant managers outside our own team: their hands-on experience steers what might become next season’s adjustment to our recipe or process.

    Trust Earned, Not Marketed: Our Commitment as a Direct Manufacturer

    Our most valued relationships come from users who know their own operations as well as we know ours. They do not want glib promises; they want results that hold day after day, in real production settings, not just lab glass. We answer questions directly about process parameters, unexpected shade drift, and complaints—because we made the product, we owe practical, workable solutions. We know the trace route for every shipment: which reactor, which date, and even which operator monitored each parameter.

    It may sound old-fashioned, but we stand behind our Acid Black ET powder batch, drum after drum, year after year. Mistakes get fixed. Every year brings a new crop of customer challenges, and we respond with improvements, no matter the hassle to our own process. The benefit returns as trust—customers stay with us not because of an ad, but because real data and conversations solved their plant’s issues.

    Supporting Our Partners: Beyond the Factory Gate

    We provide more than a standard product out the door. Detailed instructions come with practical advice based on what we have seen work—and fail—across hundreds of batches and customer settings. Whether mixing by hand, dosing with automated systems, running at high-speed, or filling vessels with slow batch protocols, Acid Black ET adapts predictably because our own technicians have faced similar situations.

    For problems that cross into regulatory territory, we keep up to date on the evolving compliance scene. New certifications, updated declarations for heavy metal exclusions, and advice on wastewater rinse-out stem from direct interaction with auditing bodies and the questions plants must answer during inspection. Real experience in handling batches, mitigating environmental risk, and maximizing value bring concrete support to our clients, not just a product.

    Through the Supply Chain—Direct, Accountable, and Ready for New Demands

    Being the production origin means we set, and keep, our own standards. There is no intermediary to pass the blame if lots drift or the wrong grade is delivered. Each batch number leads straight back to our actual tanks, our team, our watch. From raw material to finished bag, our Acid Black ET ships with every data point our clients might request—dye content, contamination screening, particle size check, all tested and logged.

    We track feedback: storage conditions, mishandling, batch aging, or unusual weather during shipping. Our packaging team matches shipment to destination, balancing between what preserves product strength and what cuts excess waste. If a customer in a humid region needs extra protection, that shipment gets it. Otherwise, we keep packaging lean for regions where storage is a known commodity. This isn’t marketing—it is responsiveness, born of years under our own roof making this product day in, day out.

    Concluding Thoughts: Acid Black ET as an Ongoing Partnership

    Acid Black ET stands as more than a commodity produced, packed, and shipped. Every drum and bag we send out carries the weight of our plant’s daily learning, ongoing customer discussions, and the honesty of a direct producer who answers for every outcome. We do not claim perfection, but the heart of our work is practical improvement—better performance, clearer solutions, tighter traceability. If a plant manager or technician asks, we do not tell stories. We share what we have seen, solved, and improved, because that is what real partnerships require.

    Each year, the market expects more—from consistency, from compliance, from technical support, from ongoing improvement. As direct manufacturers, we continue to listen, to improve synthesis, to safeguard operators, to support environmental goals, and to stay available for field troubleshooting. Acid Black ET keeps pushing forward, shaped by users’ hands, our own plant teams, and the shared goal of turning knowledge—earned on the line—into practical chemistry in the field. We invite those ready for more than just a bag of dye powder to reach out and share their own challenges, knowing we listen and adapt for the long haul.

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