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HS Code |
318212 |
| Cas Number | 3943-89-3 |
| Ec Number | 223-546-4 |
| Molecular Formula | C27H25N2O7S2Na |
| Molecular Weight | 576.61 g/mol |
| Synonyms | Acid Green 50, Fast Green FCF, Food Green 3 |
| Appearance | Green powder |
| Solubility In Water | Soluble |
| Dye Class | Triphenylmethane dye |
| Applications | Food coloring, cosmetics, textiles, pharmaceuticals |
| Absorption Maximum | 625 nm (in water) |
| Stability | Stable under normal conditions |
| Ph Range For Use | 2 to 10 |
| Iupac Name | Disodium 4-[4-(ethoxycarbonylamino)-3,6-dimethyl-2,5-dioxo-1-piperazinyl]-5-oxo-6-(phenylamino)-1,3,4-thiadiazine-2-carboxylate |
| Hazard Statements | May cause irritation to skin, eyes, and respiratory tract |
As an accredited Acid Green 50 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | A 500g plastic bottle labeled “Acid Green 50,” features hazard symbols, batch number, manufacturer details, and secure tamper-evident seal. |
| Shipping | Acid Green 50 should be shipped in tightly sealed, corrosion-resistant containers, clearly labeled with hazard warnings. Transport in accordance with local, national, and international regulations for hazardous chemicals. Protect from heat, moisture, and incompatible substances. Handle with appropriate personal protective equipment to prevent leaks, spills, and environmental contamination during transit. |
| Storage | Acid Green 50 should be stored in a tightly sealed container, in a cool, dry, and well-ventilated area away from incompatible substances such as strong oxidizers. Protect the chemical from heat, moisture, and direct sunlight. Clearly label the storage container, and ensure access is restricted to trained personnel. Follow all relevant regulations and safety protocols when handling and storing this dye. |
Applications of Acid Green 50 in Industrial ManufacturingAs a manufacturer of Acid Green 50, we supply this dye to a focused network of industries where its chemical performance meets sector-specific requirements for color consistency, stability, and regulatory compliance. Below, we highlight the leading industrial scenarios where our material integrates into established downstream formulations and processes, each with unique technical considerations. 1. Wool and Polyamide Textile DyeingWool and polyamide (nylon) textile producers employ Acid Green 50 for deep, vivid green shades required in fashion, uniforms, and interior textiles. Our dye interacts selectively with amine and carboxyl groups present in these fibers, enabling precise shade development in batch and continuous processes. Textile colorists select Acid Green 50 both for its exhaust dyeing affinity under acidic conditions and for its high wash fastness, critical in apparel and technical textiles subject to repeated use and cleaning. Industry compliance standards
Typical usage ratio
Downstream process integration
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2. Leather FinishingFull grain, split, and corrected grain leathers demand dyes with excellent penetration and light fastness. Industrial tanneries incorporate Acid Green 50 in post-tanning stages to deliver green shades for footwear, leather apparel, gloves, and upholstery. The dye’s solubility and migration profile allow deep, uniform uptake during drum dyeing, ensuring color uniformity even on variable hides. Industry compliance standards
Typical usage ratio
Downstream process integration
Final product types
3. Paper Coloration (Specialty and Tissue Grades)Paper mills use Acid Green 50 in the wet-end coloration of tissue, specialty stationery, and decorative papers. The dye’s anionic nature ensures stable coloration in acidic pulp systems, delivering brilliant green tones with high migration stability, even at low dosages. Papermakers value its fastness to light and solvents in high-specification artistic and gift wrap applications. Industry compliance standards
Typical usage ratio
Downstream process integration
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4. Silk Dyeing for High-End Garment & AccessoriesProducers of silk fabrics and accessories apply Acid Green 50 to achieve luxury color grades demanded by haute couture, premium scarves, and home textile exporters. The dye’s brilliance and affinity under controlled acidic conditions supports intricate pattern work and uniformity across large lots. Silk finishers require precision in dye addition and leveling to achieve multi-tonal effects, leveraging the material’s unique chemistry with fibroin protein structures. Industry compliance standards
Typical usage ratio
Downstream process integration
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5. Artificial Fiber Blends (Viscose and Modal)Blenders and spinners for cellulosic fibers such as viscose or modal introduce Acid Green 50 during yarn and tow dyeing to meet precise color quality specifications for functional and decorative blends. The dye’s compatibility with cellulose under acid-assisted systems allows fast diffusion and durable shade capture, supporting high-efficiency batch and continuous processes characteristic of technical textile and workwear industries. Industry compliance standards
Typical usage ratio
Downstream process integration
Final product types
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Competitive Acid Green 50 prices that fit your budget—flexible terms and customized quotes for every order.
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Tel: +8615371019725
Email: admin@sinochem-nanjing.com
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Manufacturing Acid Green 50 forces everyone involved to pay attention to every step. Experienced hands know this dye’s potential for consistent, bright shades on wools, sized cotton, and select silk blends. The level, bold color results come from its chemical backbone—not just how a customer throws it on a recipe sheet, but how the molecule interacts with fibers and water. We use a synthesis process built on years of reaction control, filtration, and quality checks. Tiny changes in pH or reaction time shift the shade, so we never shortcut testing or finishing. Older hands will tell you: sloppily made Acid Green 50 usually means uneven dye uptake and dissatisfaction in the wet lab. We keep batch records, raw material certificates, and yield logs lined up for a reason. Each production run runs through hands trained to spot off-spec batches.
Acid Green 50 owes its shade to its triphenylmethane structure, designed to bind with protein fibers. This model stands out for its brilliant green hue—rich, not blue-shifted—and stable in an acid bath. Typical lots roll out with a strength tolerance that tightens every year as textile buyers keep raising standards. We target a high dye content and low insoluble matter. Moisture content sits within a margin because extra water changes handling and dissolves unpredictably. A fine, even powder remains easier to sieve, weigh, and dissolve—a result not of luck, but careful particle size management at the drying stage. Our process proved itself batch after batch; it resists common pitfalls like clumping or poor solubility. Rechecking every drum, we rule out contamination—because trace metals or organic impurities throw off the dye bath, causing wasted stock and headaches at finishing.
On the shop floor, mill operators reach for Acid Green 50 for worsted wool, specialty knits, and vending yarns that must meet both sharp-eye inspectors and international standards. Over the years, we’ve chased after elusive problems such as migration during fixation, dye bleed in high-humidity storage, or poor lightfastness. We build experience into the production: tighter controls, better filtration, and cleaner drying translate to fewer problems at customers’ kettles. Textile finishers want levelness and minimal off-shade, but high reproducibility stands out as the true test. Mill after mill asks about shade build-up, whether the green holds at lower concentrations, and how far the color carries in large exhaust systems. With Acid Green 50, they routinely report clear rinses and fullness of shade, as long as process parameters stay in the sweet spot for pH and temperature. They value no yellow haze and no dusty bloom, attributes shaped by resin control in manufacturing and final grinding technique.
Acid Green 50 separates itself from basic green or modified-fast acid dyes by how it sticks with proper depth and clarity, not muddiness. Some competitors ship material with more coarse grains or unstable side-products, driving up filter press downtime and chemical waste. We’ve seen imported dyes that collapse in harsh acid—no longer bright, but faded, splotchy messes. Our own teams track these failures; we speak from the edge of the dye bath, not the comfort of a sales catalog. Whereas naphthol- or sulfur-based greens can bleed during washing or crock tests, Acid Green 50 follows a set path: it fixes cleanly, resists feathering, and minimizes fuzzy outlines on prints or level dyeing. We do not recommend it for direct dyeing on cellulose; it simply isn’t built for full permanence there. But on wools, cashmere, and angora blends, this dye holds luster and intensity. Unlike reactive greens, there’s no scouring step to dodge unfixed dye—if platform parameters are right, the shade speaks for itself. Years listening to mill managers made this clear: reliability from bag to bath makes the difference between a trusted supplier and one-off sale.
Color houses and labs using Acid Green 50 often raise questions about shade uniformity, lightfastness indoors, and compatibility with other acid dyes. Our own staff run pilot dyes monthly to check not just hue, but how the product fares under varied steam, rinse, and exposure conditions. Some seasons, humidity runs high across warehouses and dissolver tanks, but our packing lines stick to moisture-proof drums and liners—because soft cakes bring more than mess, they bring calculation headaches. For large-scale dyeing, we learn firsthand how the solubility curve of Acid Green 50 shifts with temperature and water mineral content. Early mistakes years ago taught us: city versus well water, hard versus soft inputs, alter leveling and drive variability. Today, our technical staff help clients match water pre-treatment regimes with our dye’s profile, supporting better yield and fewer rejects.
Customers using our Acid Green 50 tend to share feedback with rare candor, telling us when a lot runs lean or strong, or when their pH curves slip out of the recommended window. We hear from finishers driving for deeper penetration in felted wool, or from printers matching edge-to-edge coverage on intricate silk scarves. In these cases, even the relative fineness of our powders comes into play—because undissolved specks can make expensive fabrics look uneven, drawing instant rework orders. Our teams double-check every filtration step and keep photo records from each run; pointing out how cloudiness or haze in solution either signals a batch to hold or greenlight for packing. Long-term buyers come back because they value that level of direct oversight. If a complaint surfaces, the same technical lead who managed the batch usually takes the call, diving into logbooks, samples, and past corrections. The cycle of feedback pushes us to continually tune drying, blending, and sieving schedules—never resting on the assumption that last month’s spec can repeat mindlessly.
Dye chemistry changes with consumer safety rules and evolving export standards. Acid Green 50 must meet not only color and strength but also comply with restricted substance lists—azo components, heavy metals, and formaldehyde presence come under tighter regulation each year. As a manufacturer, we see fresh audit demands and ingredients traceability, knowing that a misstep leads to rejected shipments and brand damage. Tests checking for banned amines or residual solvents now form routine batch release. Years ago, these tests were rare; today, they shape batch planning, raw material supply, and maintenance schedules. Environmental compliance also drives us to refine wastewater treatment, track process losses, and minimize waste solids at each processing stage. Old disposal practices give way to closed-loop systems, separating out dye solids for controlled handling, rather than casual discharge. The challenge comes with rising costs, but we view these investments as part of what ensures long-term demand for a trusted product. Transparent reporting to customers—showing every test, every certificate—keeps confidence high and supports their own traceability requirements at downstream stages.
Textile manufacturers today work faster, run more diverse orders, and face new fastness expectations on a dizzying range of blends. Acid Green 50 adapts, with the right preparation and technical guidance. Customers not only request strong shades, but also drive questions about microplastic release, dye fixation residues, and recyclability of dyed goods. Our R&D teams respond by examining every additive and accelerant: reducing dispersants that could leave residues, examining after-treatments for improved color fastness, and making packaging adjustments for safer handling in automated shops. Working closely with dye houses, we’ve tailored recommendations on pre-wetting, dispersing, and pH adjustment for Acid Green 50 to suit high-speed jet and beam dyeing. Users aiming for the brightest shade must manage liquor ratio, hold precise time and temperature, and adjust salt dosing—not only because our advice says so, but because years of trial and error on the line confirm every technical directive we share.
Other available green acid dyes often vary in purity, grind, or batch strength. Years of customer feedback tell us what matters: ease of dissolution, shade accuracy, and freedom from specks or graininess. Our Acid Green 50 stands out through repeatable strength and clarity—more than just lab metrics, but backed by mill test records and real production runs. The stability in storage and in use differentiates it further. No gray undertones suddenly appear; no green stains fade out quicker than expected in light or after multiple washes. Partnering with dye houses worldwide, our technical staff keep watch on unexpected side-effects during scale-up—surface bloom, unwanted shade shifting, or premature fading under aggressive washing. Raw material control helps us hit target shade with minimal variance across containers, so customers can order anew without redoing recipes. These daily realities—ducking the pitfalls of off-shade lots, processing dust, and batch-to-batch guessing—prove our dye’s worth time after time.
From cottage industry weavers searching for long-lasting, bright greens to industrial dyers running jet dye machines 24/7, Acid Green 50 bridges tradition and scale. Our staff handle requests for shade-matching to heritage textiles and for references against leading international color systems. When batch differences arise, we open solution samples and reference panels, tracking drift with methods sharpened over years. Waste reduction guides every step: raw material dosing, cleaning protocols, and product testing all aim at squeezing maximum utility from every kilo of dye. Field visits with dye staff have shown us the importance of water quality and proper dispersion—as dissolved impurities or metallic ions cut into shade yield and leveling. For clients new to acid dyeing, we support test runs and technical workshops, improving process know-how with advice grounded in firsthand trial, not distant theory. Repeat customers, large and small, appreciate the transparency and commitment brought by a manufacturer invested in their results.
The textile sector keeps moving toward tighter controls on effluent, reduced synthetic content, and increased traceability for chemicals. Our approach to Acid Green 50 reflects this reality, not just to meet today’s audits but to anticipate buyers asking detailed questions about upstream inputs, packaging waste, or renewable content. Products delivering color must also respect their impact; we scan each stage for improvement, from sourcing starting materials with fewer unwanted byproducts, to reducing rinse demands or facilitating wastewater recycling downstream. Customers seeking green credentials ask about waste minimization, safe handling, and regulatory certifications; our batch records and open-door audits address these directly. At the same time, we continue to experiment with process tweaks—slight adjustments to grinding, mixing, or filtration, drawing on lab-scale findings—and transfer them to full production only after clearing every practical test. Ongoing skill-building for workers, process troubleshooting, and investment in safer plant systems help meet higher expectations for both quality and responsibility.
Buyers face pricing pressures from raw materials, energy costs, and freight, but still demand that each drum of Acid Green 50 delivers predictable results—strong color, minimal defects, and real run-to-run stability. Over the years, we’ve learned the importance of keeping technical assistance close at hand, sending not just paper instructions, but directly answering shopfloor questions during scale-up, startups, or troubleshooting. Experience reminds us why inventory turn matters: fresh stock, proper stacking, and climate-controlled storage all stop caking and ensure the dye performs just as it leaves our plant. Freight damage or storage mishaps occasionally crop up; our shipping teams and local reps track these, making real-time corrections and documenting every step. We stay in dialogue with buyers, adjusting lead times, drum sizes, and shipment protocols based on their evolving needs. Each aspect—clean paperwork, responsive service, and rigorous production controls—keeps the product dependable.
Market shifts, regulatory surprises, and feedback from operators all guide improvements. Rising demands for non-toxic auxiliaries, less energy-intensive fixation, and compatibility with circular manufacturing push our process adjustment efforts. As international buyers tighten up supplier scorecards, clear traceability, full documentation, and transparent communication mark the next frontier. Investment in plant upgrades, skilled technical staff, and proactive compliance audits takes priority for us—lessons learned through both near-missed deadlines and close calls with new regulatory hurdles. The story of Acid Green 50 isn’t static or locked to a single practice; it’s shaped by constant listening, adapting to both what works on the production floor and what customers experience at scale. We value details—the feel of the finished powder, the slip of the dye during solutioning, the deep saturation achieved in each final good. These day-to-day realities, not sales figures or marketing claims, prove the dye’s reputation.
Years at the reactor, in the wet lab, and beside shipping drums drive home the importance of each step in producing Acid Green 50. Competition, regulation, customer expectation, and technical hurdles shape our vigilance. Every kilo represents effort from operator, QA tech, and process engineer, and our approach builds on feedback, record-keeping, and respect for every user’s unique challenge. Acid Green 50 keeps its value not through shortcuts or easy claims, but from the hard work of aligning chemistry, process control, and customer collaboration. Trust grows through this discipline, and future development keeps one eye on evolving needs, one on the batch logs that brought us here. Each drum stands as a record of diligence, expertise, and a respect for the many ways color shapes the textile world.