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Sulfalen

    • Product Name Sulfalen
    • Alias Sulfalene
    • Einecs 222-748-8
    • Mininmum Order 1 g
    • Factory Site Tengfei Creation Center,55 Jiangjun Avenue, Jiangning District,Nanjing
    • Price Inquiry admin@sinochem-nanjing.com
    • Manufacturer Sinochem Nanjing Corporation
    • CONTACT NOW
    VTB
    Specifications

    HS Code

    508113

    Generic Name Sulfalen
    Chemical Formula C11H10N4O2S
    Drug Class Sulfonamide antibiotic
    Molecular Weight 262.29 g/mol
    Atc Code J01ED02
    Cas Number 62-74-8
    Mechanism Of Action Inhibits bacterial dihydropteroate synthase
    Route Of Administration Oral
    Appearance White to yellowish crystalline powder
    Solubility Slightly soluble in water
    Indications Treatment of bacterial infections
    Synonyms Sulfalene, Sulfametopyrazine

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

    Packing & Storage
    Packing Sulfalen is packaged in a white plastic bottle containing 100 tablets (500 mg each), featuring blue labeling and safety instructions.
    Shipping Sulfalen should be shipped in tightly sealed containers, protected from light and moisture. Transport according to local, national, and international regulations for hazardous chemicals. Ensure proper labeling and include safety data sheets. Avoid exposure to heat or incompatible substances. Handle with appropriate personal protective equipment and store in a cool, dry place upon arrival.
    Storage Sulfalen should be stored in a tightly closed container, protected from light and moisture. Keep it at room temperature, ideally between 15–25°C (59–77°F). Store in a dry, well-ventilated area away from incompatible substances such as strong oxidizers. Ensure that only authorized personnel handle the storage area, and always follow relevant safety regulations and guidelines for chemical storage.
    Application of Sulfalen

    Applications of Sulfalen in Industrial Manufacturing

    Sulfalen finds established industrial applications in selected regulated sectors due to its defined chemical properties and proven performance. Here, as a dedicated manufacturer, we outline its real-world integration in leading downstream fields, focusing on compliance, formulation guidelines, workflow integration, and finished product categories.

    1. Pharmaceutical Intermediate for Sulfonamide Antibiotics

    As a critical intermediate, Sulfalen enters the synthesis of certain sulfonamide-class antibiotics produced in GMP pharmaceutical facilities. Manufacturers rely on its precise reactivity to achieve high-yield, low-impurity conversion during multi-stage synthesis. The intermediate’s purity and traceability undergo strict routine batch tests to support regulatory and pharmacopoeial submissions for finished drug substances.

    Industry compliance standards

    • ICH Q7 (Good Manufacturing Practice for Active Pharmaceutical Ingredients)
    • EU GMP (EudraLex Vol. 4)
    • USP/NF and Ph. Eur. standards for starting materials and intermediates
    • ISO 9001:2015 certified quality management

    Typical usage ratio

    • Applied at stoichiometric levels (1.0 molar equivalent) as determined by target sulfonamide molecule synthesis;
    • May adjust within 0.95–1.05 molar ratio depending on reaction optimization, yield, and byproduct control requirements;
    • Excess dosing avoided to streamline downstream purification.

    Downstream process integration

    • Charged during the key condensation or coupling reaction step following upstream amine activation;
    • Processed under controlled temperature and solvent conditions specific to target antibiotic’s process flowsheet;
    • Undergoes post-reaction purification (e.g., crystallization, solvent exchange) to isolate the qualified active intermediate.

    Final product types

    • Sulfadiazine API (Active Pharmaceutical Ingredient)
    • Sulfamethoxazole bulk API
    • Finished oral and injectable sulfonamide antibiotic formulations (tablets, suspensions, sterile solutions)

    2. Veterinary Antimicrobial Production

    Animal health product manufacturers utilize Sulfalen as an essential precursor in bulk synthesis routes for veterinary antimicrobials. Production lines integrate the raw material under feed and medicine GMP environments to ensure batch-to-batch consistency and compliance with residue limits when used in veterinary drugs for livestock and companion animals.

    Industry compliance standards

    • VICH GLs (Veterinary International Cooperation on Harmonisation Good Manufacturing Practice)
    • ISO 9001:2015 for animal health chemical supply chain
    • China Veterinary Pharmacopoeia (for China market-specific products)
    • FDA CVM Guidelines (US market)

    Typical usage ratio

    • Typical charge ratio: 1.0 molar equivalent per antimicrobial molecule synthesis batch;
    • May reduce to 0.98 or increase to 1.02 for reaction balancing in continuous or batch-fed reactors;
    • Optimized to minimize residual upstream material in technical crude output.

    Downstream process integration

    • Added immediately prior to ring closure or final coupling step in veterinary API manufacturing;
    • Processed in stainless steel pressure reactors with in-line analytical QC checkpoints;
    • Purification through sequential distillation, drying, and sieving for feed-grade and injectable-grade intermediates.

    Final product types

    • Poultry and swine sulfonamide feed additives
    • Dosed veterinary powder mixes
    • Veterinary injectable antimicrobials for large animals

    3. Specialty Dye Manufacturing

    In the fine chemicals sector, Sulfalen serves as a sulfonating agent and backbone building block in the synthesis of specific azo and sulfonated dyes. Colorant manufacturers employ it for reliable chromophore formation, seeking high tinctorial strength and shade reproducibility that depend on feedstock uniformity and stringent analytical release profiles.

    Industry compliance standards

    • REACH Regulation (EC) No. 1907/2006 for chemicals in dyes
    • Oeko-Tex® Standard 100 (textile dye safety certification)
    • ISO 9001:2015 for fine chemical process controls
    • General Product Safety Directive 2001/95/EC (for applicable regions)

    Typical usage ratio

    • Loading at 0.80–1.10 molar equivalents relative to diazo coupling partners based on shade target;
    • Variance linked to compound class (mono-, di-azo) and batch to batch shade calibration;
    • Excess avoided to limit downstream purification demand and environmental outlet loads.

    Downstream process integration

    • Introduced during initial sulfonation or diazotization phase in dye reactor vessels;
    • Involves pH-controlled batch processes with real-time colorimetric QC adjustments;
    • Post-reactor workup includes filtration, solvent recovery, and spray drying or granulation for finished dye form.

    Final product types

    • Water-soluble azo textile dyes
    • Leather dyes with sulfonate functional groups
    • Paper dyes for high-fastness applications

    4. Analytical Reagent Preparation

    Producers of analytical reagents employ Sulfalen as a benchmark compound for standard curve calibration and validation of chemical analysis kits. Its chemical stability and reactivity make it suitable for ready-to-use laboratory formulations involved in residue, trace, and calibration testing in pharmaceutical and environmental laboratories.

    Industry compliance standards

    • ISO 17025:2017 (Testing and Calibration Laboratories)
    • GLP (Good Laboratory Practice) Principles (OECD and FDA guidelines)
    • DIN EN ISO 9001:2015 for analytical supply chain
    • Internal certified reference material (CRM) protocols

    Typical usage ratio

    • Prepared as standard solutions from 1–100 μg/mL, tailored to the respective analytical procedure sensitivity;
    • Prepared as solid reference material with purity ≥99.5% w/w, measured gravimetrically;
    • Adjustment based on detection limits, calibration range, and end-user lab equipment capabilities.

    Downstream process integration

    • Directly weighed or dissolved to produce calibration ampoules or ready-made assay kits;
    • Processed with deionized water, stabilized with inert fillers as required, and bottle-sealed under inert atmosphere;
    • Packaged and certified against internal or external standard reference methods.

    Final product types

    • Chemical reference standard vials
    • Pre-formulated analytical assay kits
    • Certified reference solutions for QC calibration
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    Certification & Compliance
    More Introduction

    Sulfalen: From Factory Floor to Field Application

    The Realities of Manufacturing Sulfalen

    It takes years of practice in chemical manufacturing to truly understand why Sulfalen stands out among antimicrobials. Out there in the market, you’ll find plenty of biocidal actives that may promise similar effects, but none handle quality, reliability, and adaptation to end-use better than Sulfalen. We built our process floor-up for those needing this active at a consistently high standard—pharmaceutical and veterinary industries, mainly—where every kilogram has a real-world job to do. The robust core model we produce is called Sulfalen Tech Grade 99%, which meets the pharmaceutical and research industry’s primary demands. Each batch comes off our lines under controlled conditions because impurity control sets the stage for target application, not marketing rhetoric.

    Our team operates with a grounded understanding of what the end-user faces. There are times we’ll get requests for higher-purity material, so we make adjustments onsite to remove process-related byproducts. Many biocides deliver the expected action against bacteria and protozoa, but Sulfalen maintains stability during formulation, benchwork, and even within demanding environmental stressors. The structure of Sulfalen—N1-(4-aminobenzenesulfonyl)-N2,N2-dimethylformamidine—didn’t happen by accident. We carry out repeated tests on both the raw and finished product to hit the 99% active mark for Tech Grade and up to 99.8% for Pharmaceutical Grade. This tight control translates to minimal waste on the user’s end, fewer reprocessing cycles, and reduced unplanned downtime in manufacturing plants formulating finished antibiotics.

    Lab Walkthrough: From Raw Input to Finished Sulfalen

    Producing Sulfalen starts with a real encounter with the raw materials market. Not every lot of aniline sulfonic acid or dimethylformamide meets our threshold, and procurement quality checks often mean returning shipments. In our early days, we accepted lower spec material and saw the downstream effects—reduction in assay, batch failures, off-color powders. Since then, we fixed our accepted input quality and locked parameters for process controls. Reaction temperatures and solvent runs receive constant adjustment and repeated checks so that degradation products don’t build up. Flash cooling and rapid dry-down techniques prevent even minor losses in active content.

    The result: Sulfalen Tech Grade presents as a pure, consistent, off-white powder, not the pale yellow or slightly gray variants often found in tonnage quantities elsewhere. Those seemingly minor color shifts usually trace back to incomplete synthesis, inefficient filter removal, or overexposure to airborne moisture. These variations complicate downstream blending or create storage issues for bulk handlers. Product reliability, batch after batch, earned us long-term clients who no longer hound us for re-tests or second confirmations. They see that consistency come through in their own QA processes, freeing their teams to focus on real innovation, not policing raw material.

    Specification Isn’t Just a Number

    Specification sheets are reference points, but on our line, those numbers aren’t hypothetical. Sulfalen Tech Grade at 99% active content isn’t a maximum; it rides close to average, with a commitment to avoid the troughs that cheapen mass production. Moisture content rarely exceeds 0.2%, and residual solvents never drift above safe industry guidance. To us, these metrics are everyday practice, not points of marketing differentiation. Clients’ onsite audits see the same readings we show regulators. Each specification serves the user’s actual application—no clever wording or tulip-like charts that mean little at scale.

    In medical and veterinary space, tighter impurity control is not a luxury. Those running batch syntheses for finished dose antibiotics—especially injectable formulations—demand high actives and barely there insolubles. A small difference in off-target residue can mean a major regulatory headache downstream or, worse, field failures that cost companies real reputation and capital. We take real pride in solving those pain points up front, informed by years of experience talking directly with technical directors, production managers, and lab staff who live or die by product quality, not advertising copy.

    On-Site Application: Meeting the Needs of Downstream Formulators

    Feedback from formulators taught us that not all Sulfalen is equally usable. Several industry players base their approach on cost-minimization, dumping off-grade output at a minor discount. This short-term view means their partners eat the cost in blending inconsistencies, regulatory rework, and lost time. Our approach—see every batch to the finish—means fewer returns, essentially zero technical complaints, and high predictability that goes upstream and down. For manufacturers scaling up antimicrobial combination therapies, that predictability pays dividends. Close specification matching grants fast, headache-free scale-up, with no real need for repeated method qualification in QC labs. From oral tablets to external solutions, users find their processes stable batch after batch.

    Some of our long-term agricultural partners explained that when they pulled material from third parties, they got powder with variable flow, unpredictable solubility, or out-of-spec particle sizing. Each problem created a domino effect during large-scale feed blend production. Our process keeps particle size within a tight distribution, favoring median diameters ideal for high-shear mixing equipment. Users see fewer dusting issues, faster integration, and better stability in finished formulations. Those who want extra-fine or coarser cuts for specific animal health applications can order customized size fractions—no need for their local staff to waste time fine-screening or re-milling at their own facilities.

    The Differences That Actually Matter

    Walking the floor and talking with users laid out the crucial differences between our Sulfalen and what the wider market often delivers. Many alternatives—especially from regional or trader-directed plants—lack traceable manufacturing records. This opens the door to irregularities batch-to-batch. Our process is auditable; documentation follows every drum from input to finished shipping. Regulatory and technical audit teams confirm our analytical records line-for-line—not glossy PDF reports, but hard data from validated runs. End users get product with real lineage. When it’s their customer’s health or their own regulatory standing on the line, that transparency isn’t optional.

    Pharmacopoeial compliance isn’t optional either. Our plant operates under strict GMP, with every change in procedure or material checked, logged, and validated for reproducibility. Years ago, one of our best clients walked a site producing off-catalog Sulfalen; they reported solid specs on paper, but in storage and testing, their batches lost assay and developed unexpected off-odors. After switching to our supply, those storage failures stopped. Shelf-ready products stored two years under real-world warehouse conditions (ambient, no dehumidification) stuck to the original assay and color. Where some alternatives might save a few cents per kilo, they cost users days in remedial work, working capital tied up in retesting, and missed launches. We cut those hidden costs out.

    Safety Focused from Synthesis Onward

    Safe handling and clear identification of impurities matter from the earliest synthesis stage. Many forget that overlooked process residues—chlorinated solvents, trace amines—compound risk during solvent recovery far more than at the benchtop. All our process water, solvents, and waste streams get internal recycling where feasible, and all emissions sit comfortably below regulatory thresholds. Technical teams screen for allergenic and toxic potential, with weekly monitoring linked directly to controllers and alarms. Long-standing oversight ensures that material with any deviation from target profile doesn’t hit the customer dock—no “sell it anyway” conversations behind the scenes.

    Production line staff receive ongoing training on GMP compliance, root-cause investigation, and early problem detection. We invite customers’ auditors to check not just finished powder, but all intermediate holding steps and utility streams. Any flagged issues undergo open joint review; this approach takes more time, but we know corner-cutting saves only in the short run. From synthesis to packaging, full batch traceability and integrity checks keep our material—not just a Sulfalen clone—trusted at the user end.

    Beyond Basic Supply: Technical Partnership

    Customers regularly bring challenges direct from their own R&D: solubility issues, unexpected color changes during formulation, and interaction with other actives. Over the years, we’ve tested Sulfalen alongside more than a dozen common APIs in finished blends. Many of these blends react poorly to off-standard Sulfalen—batch instability, gelatinous precipitates, color changes after exposure to air. We learn rapidly by working hands-on with manufacturing partners and tweaking our process to deliver better compatibility, even if that means sacrificing headline yield for a tighter impurity profile.

    Our technical teams sit on ongoing projects, offering empirical support—not vague advice but actual numbers from control runs. Through these partnerships, we nailed down particle sizes that show improved blending in large-scale tablet and powder formulations. In one example, feedback from a veterinary manufacturer led to a process shift, creating a more compressible powder suitable for high-speed press tools. Keeping two-way lines open means the product evolves with real needs, not just on lab paper tested in isolation.

    Environmental Responsibility: More than Just Regulatory Talk

    On the factory floor, responsible manufacturing goes further than posting certificates on the wall. Every input stream gets screened for origin and contamination risk, and we document impacts for all process intermediates. Our waste handling doesn’t simply tick a bureaucratic box—for each step, we review impact on both immediate workers and broader downstream users. If solvent residue or byproducts can be repurposed safely, they are. Otherwise, material heads for managed treatment, not shortcut disposal. Our water management already falls well under national chemical regulation. Efflux risk, often underplayed by secondary producers, is mitigated by automated monitoring, manual audits, and active worker involvement at every process stage.

    Market Realities: Real-World Performance, Not Just Price

    With decades working first-hand in active manufacturing, we’ve seen that price remains most visible in customer decision-making, but off-list costs end up mattering more. Early attempts at “cost-down” strategies led to minor victories—a short-term, small margin gain—followed by a run of extra warranty claims and repeated site visits to troubleshoot complaints. Every hour lost to requalification means actual dollars evaporate, staff diverted, regulatory conversations elongated. Our current model keeps to a cost profile that’s not lowest, but stable, because failures for customers prove much more expensive in total.

    To those working procurement, differences between suppliers blur by catalog listing. Yet technicians working in actual blending rooms, batch rooms, or QC labs see the difference: Sulfalen with measured batch consistency, well within analytical claims, and reliably reorders week over week. Speculation can tempt users—trial orders from the lowest-priced factory, mix-and-match from the spot market—but many have come to us wishing to fix inherited problems. Rework, emergency blending, urgent overnight shipments—these sometimes undo years of procurement “optimization.” Consistent, reliable performance from Sulfalen has kept our regulars out of those cycles and saved them more invisible costs than any marginal kilo price can offset.

    Adaptability: Real Solutions to Real Challenges

    No batch ever walks out our doors without a final review for customer-specific needs. Some want feedstock compatible material for veterinary applications, where solubility in plant-based carriers matters most. Others request particle sizing strict enough for high-speed compression tableting, or compound blends that require stability under multiple pH conditions. Our team works with technical partners in-person, replicating exact usage conditions—whether acidic blend, complex powder, or highly diluted fluid concentrate. Clients invite us to run batch checks alongside them, sometimes at their own facility, and joint process validation gives everyone confidence the material will perform as intended.

    Market shifts sometimes demand new supply chains—tight timelines, fast response. During entry into a new regulatory market, clients needed documentation support and technical translation. Our technical staff worked directly with their teams to assemble custom registration dossiers and resolve real-life blending challenges, in some cases restructuring our internal process flow to match end-user spec sheets. Flexibility comes from understanding not just the chemistry, but the context in which the customer applies it.

    Supporting Pharmaceutical and Veterinary Productivity

    Sulfalen’s primary use as an antimicrobial sets it apart, and our manufacturing route ensures the material safely integrates into a broad range of therapeutic compositions. Regular pharmaceutical clients trust the Tech Grade for oral and injectable antibiotic formulations, not because of marketing claims, but because every metric—purity, moisture, impurity content—is repeatable at scale. Veterinary clients blend it into powders and solutions, reporting back on ease of blending and downstream product stability across livestock species. Every customer working under tight regulatory control reports satisfaction in repeatability and compliance audit success.

    Actual experience in the industry tells us that failures at this stage aren’t just administrative. Animals and people count on the end effectiveness. Failures in residue limit, shelf-stability, or unexpected insolubles matter. Our tight process controls, staff training, and willingness to adopt agreed changes paid off in years of low complaint rates and strong user retention across tough segments—poultry, swine, and high-turnover hospital supply chains alike.

    Quality You Can See—and Audit

    Our site welcomes regulatory and technical inspection. Auditors from both public and private institutions check our full batch trail from incoming input material to finished Sulfalen shipment. Clients appraise not just product on specification, but workflow, documentation, and deviation management. Every return or deviation earns a root-cause investigation, documented resolution, and real updates to preventive controls. This cycle keeps internal teams sharp and external partners assured that problems—rare as they are—don’t recur. We see inspection as a collaboration, not a burden, precisely because we have nothing to hide.

    Customers who periodically visit can directly review our production notes, batch logs, and analytical worksheets. Many technical managers working in the veterinary and human medicine fields comment not only on product quality but the openness of our process. That transparency ensures that users confident in our supply never worry about unusual downtime, blending interruptions, or failed batch retests down the line. We understand our material becomes part of your end product; treating it seriously from receipt to production makes everyone better off.

    Conclusion: The Real Value of Proven Sulfalen Supply

    After decades on the production side, we’ve learned that nothing builds customer confidence and reliability in antimicrobials like batch-by-batch traceability, high purity, and responsive technical partnership. Sulfalen Tech Grade stands as the product of this philosophy: not a generic item, but a proven, adaptable building block for antimicrobial therapies in both people and animals. We keep costs honest, documentation ready, process controls tight, and technical lines open, learning with users as they face new regulatory, technical, and commercial realities. Real manufacturing knowledge, built in the plant and honed through actual user experience, defines the difference in quality, safety, and practical effectiveness. Sulfalen sets the benchmark by which most others get measured, not by advertising but by outcome.