2,3,5,6-tetrachloro-4-(methylsulfonyl)pyridine

    • Product Name: 2,3,5,6-tetrachloro-4-(methylsulfonyl)pyridine
    • Chemical Name (IUPAC): 2,3,5,6-tetrachloro-4-(methylsulfonyl)pyridine
    • CAS No.: 131072-62-9
    • Chemical Formula: C6H3Cl4NO2S
    • Form/Physical State: Solid
    • Factroy Site: No.968 Jiangshan Rd., Nantong ETDZ, Jiangsu, China
    • Price Inquiry: sales7@bouling-chem.com
    • Manufacturer: Nantong Acetic Acid Chemical Co., Ltd.
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    Specifications

    HS Code

    321410

    Name 2,3,5,6-tetrachloro-4-(methylsulfonyl)pyridine
    Cas Number 65584-81-2
    Molecular Formula C6H3Cl4NO2S
    Molecular Weight 297.97 g/mol
    Appearance White to off-white powder
    Melting Point 115-117 °C
    Solubility Slightly soluble in water
    Density 1.74 g/cm3 (25 °C, estimated)
    Structure Pyridine ring with chlorines at 2,3,5,6 and methylsulfonyl at 4
    Inchi InChI=1S/C6H3Cl4NO2S/c1-14(12,13)5-3(7)2(6(9)10)4(8)11-5/h1H3
    Smiles CS(=O)(=O)C1=NC(=C(C(=C1Cl)Cl)Cl)Cl

    As an accredited 2,3,5,6-tetrachloro-4-(methylsulfonyl)pyridine factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.

    Packing & Storage
    Packing A 100-gram amber glass bottle with a secure screw cap, labeled with chemical name, hazard symbols, and handling instructions.
    Container Loading (20′ FCL) Container Loading (20′ FCL) for 2,3,5,6-tetrachloro-4-(methylsulfonyl)pyridine: typically 12–14 metric tons, packed in 25kg fiber drums or UN-approved bags.
    Shipping **Shipping Description:** 2,3,5,6-Tetrachloro-4-(methylsulfonyl)pyridine should be shipped in tightly sealed containers, protected from moisture and sunlight. Transport in compliance with all applicable local, national, and international regulations for hazardous chemicals. Appropriate hazard labeling and safety documentation must accompany the shipment. Handle with care to avoid spills and environmental contamination.
    Storage 2,3,5,6-Tetrachloro-4-(methylsulfonyl)pyridine should be stored in a tightly sealed container, away from moisture and direct sunlight, in a cool, dry, and well-ventilated area. Keep it isolated from incompatible substances such as strong oxidizers and bases. Properly label the container and restrict access to trained personnel. Store in compliance with relevant chemical safety regulations.
    Shelf Life Shelf life of 2,3,5,6-tetrachloro-4-(methylsulfonyl)pyridine is typically 2 years if stored sealed, cool, and dry.
    Application of 2,3,5,6-tetrachloro-4-(methylsulfonyl)pyridine

    Purity 98%: 2,3,5,6-tetrachloro-4-(methylsulfonyl)pyridine with 98% purity is used in pharmaceutical intermediate synthesis, where it ensures high product yield and reduced impurity profile.

    Melting point 142°C: 2,3,5,6-tetrachloro-4-(methylsulfonyl)pyridine with a melting point of 142°C is used in agrochemical formulation processes, where it improves handling stability and facilitates consistent batch processing.

    Particle size D90 < 50 µm: 2,3,5,6-tetrachloro-4-(methylsulfonyl)pyridine with particle size D90 less than 50 µm is used in suspension concentrate formulations, where it enhances dispersibility and uniformity in liquid suspensions.

    Moisture content < 0.2%: 2,3,5,6-tetrachloro-4-(methylsulfonyl)pyridine with moisture content below 0.2% is used in high-purity electronic chemical preparation, where it prevents hydrolysis and maintains product integrity.

    Thermal stability up to 220°C: 2,3,5,6-tetrachloro-4-(methylsulfonyl)pyridine with thermal stability up to 220°C is used in industrial catalyst systems, where it provides reliable activity under high-temperature reaction conditions.

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    Certification & Compliance
    More Introduction

    Introducing 2,3,5,6-Tetrachloro-4-(methylsulfonyl)pyridine: Insights From the Manufacturer

    Real-World Demands and The Path of Specialty Pyridine Compounds

    Developing specialty chemical products is a journey loaded with technical choices, market shifts, and practical constraints. At the heart of this dynamic arena, 2,3,5,6-tetrachloro-4-(methylsulfonyl)pyridine sets itself apart for a narrow but growing segment of chemical synthesis and crop protection applications. Experience tells us that markets rarely reward redundancy, so the molecules in highest demand must justify their place not just with technical data but with reliability, safe handling, and practical benefits. This compound carved its own space in the market as stringent regulatory frameworks and the need for enhanced chemical selectivity push beyond older-generation intermediates.

    Crafting Consistency With In-House Synthesis

    Our team tackled the challenge of producing 2,3,5,6-tetrachloro-4-(methylsulfonyl)pyridine in an environment marked by both technical complexity and strict purity requirements. Relying on legacy synthesis pathways led to inconsistent quality and by-product issues, so we reviewed every step, redesigned our chlorination and sulfonylation processes, and improved downstream treatment. The result: a crystalline solid nearly free from colored impurities, a factor that spares formulation engineers from hurdles in later blending stages.

    We maintain direct control over each production phase, from sourcing chlorinated pyridines to executing multi-step purification. Our batch records show that final water content regularly falls below 0.1 percent, and bulk density stays within a defined, tight range. These details matter, especially for buyers accustomed to batch-to-batch swings from traders and outsourced operators. Pure, stable material reduces the risk of off-specification events during scale-up in end-use plants—every missed batch wastes time and brings headaches for everyone downstream. Our focus on stability improved shelf life as well, even during monsoon conditions that often affect ambient storage in large industrial zones.

    The Role of 2,3,5,6-Tetrachloro-4-(methylsulfonyl)pyridine in Chemical Synthesis

    2,3,5,6-tetrachloro-4-(methylsulfonyl)pyridine supports highly specialized chemistries, particularly for the synthesis of selective herbicides and bioactive intermediates. This compound’s electron-withdrawing combination of four chlorine atoms and a methylsulfonyl moiety creates unique reactivity that older or less-substituted pyridines rarely offer. Its molecular design brings a predictable performance profile, with less side reactivity, so process chemists can achieve cleaner conversions. We regularly help formulation scientists troubleshoot competing side reactions that arise with similar, but less halogenated, pyridine derivatives.

    Instead of carrying risks of unwanted hydrolysis or instability—problems we’ve seen with less-chlorinated analogs—this molecule provides a robust backbone. Our partners in the crop protection field rely on these properties, especially when small changes in impurity profiles lead to lost regulatory approvals or new tox data requirements.

    Specifications That Shape Real Process Outcomes

    Our in-plant technicians conduct hands-on inspections daily, noticing details that escape most outside observers. Take color, for example. At scale, even light yellow pigmentation, often caused by incomplete purification, can foul up high-speed tableting or extrusion for downstream use. We set our color spec so tightly that one in every nine batches gets reworked—no small effort, but the result means fewer customer complaints and easier internal logistics for us. Melting point and particle size distribution align with values dictated by years of feedback from formulation and R&D teams. Too broad a particle size leads to handling problems, especially for equipment sensitive to dust or inconsistent flow. We cut out extremes at both ends.

    Packing is another detail we decided not to cut corners on. Humidity and handling threaten any fine organic, so we shifted from conventional bags to fluorinated liners and heavy-duty drums. This slowed our fulfillment process, but shipment rejections plummeted, and the cost was offset by reduced losses and safer transport, particularly to customers in regions with unpredictable customs chains.

    Supporting Safe Use and Handling

    Safety questions always arise with specialty chlorinated organics. In production, our team standardizes every handling process with local, real-world best practices, not just what looks good on paper. We host routine safety audits and invest in particulate controls throughout our blending and packing operations, keeping airborne dust low and reducing operator exposure risks. Our workers undergo specific training for hazardous material emergencies, covering both accidental exposure and large-scale containment. Not all manufacturers invest this much; we do because one serious incident can destroy both worker trust and market credibility overnight.

    We meet international transport and storage frameworks for this product class, but beyond the paperwork, we maintain our own in-facility audit schedule. Our in-house storage temperatures never exceed 30°C, and our containers stay in climate-monitored bays. We take the step of providing customers with practical use guides—compiled from our years of troubleshooting real containers, not just regulatory cut-paste—detailing what works in the field. Stories of warehouse failures circulate through our industry, so our own shipping team tracks each consignment until it clears final delivery, rather than waiting to hear back only 'if there is an issue.' This added vigilance has uncovered problems before they reach end users, allowing us to correct and learn on the fly.

    Differences From Other Pyridine Derivatives: Practical Implications

    It’s tempting to lump all pyridines into the same category, but process chemists who have endured material substitutions know better. We’ve worked hands-on with customer R&D groups to benchmark 2,3,5,6-tetrachloro-4-(methylsulfonyl)pyridine against less-chlorinated, even unsubstituted, pyridines. The difference in electron density and steric hindrance—swapping just one chlorine or the methylsulfonyl group—completely changes the chemistry. In practical use, that might mean lower conversion, higher trace impurity loads, or stability challenges that show up late in development, costing millions in re-validation.

    We fielded many requests to supply a cheaper, less-chlorinated option to suit budget-sensitive users. Yet, process trials soon highlighted why the original spec matters. Demands for uniform bioactivity or consistent herbicide selectivity wouldn’t tolerate shortcuts. In pilot operations, trace impurities from analog compounds sometimes triggered unexpected byproducts—a headache that ends up extending R&D timelines and regulatory submissions.

    Pricing pressures always nudge both us and our customers to find savings, but in this case, skimping with different building blocks directly threatens the viability of end products. Downstream, the regulatory environment—notably in Europe, North America, and parts of Asia—drew lines that can’t be crossed on contaminant thresholds. Our consistent purity and single-lot documentation protect both us and our customers from costly recalls, market blocks, or the reputational damage that comes with a failed regulatory test.

    Innovating to Survive and Meet Rapidly Changing Needs

    Standing still in chemical manufacturing never works; regulatory pressures, customer feedback, and upstream raw material shifts all force non-stop adaptation. We constantly tinker with our processes in light of what the markets and our own teams report. For this compound, the trend pulls toward tighter legislative scrutiny for residual solvents, even trace levels of polychlorinated impurities. Supply chain pressure for cleaner products comes from both multinationals and local clients dealing with evolving local rules.

    A few years ago, our teams recognized a spike in customer concern for trace environmental toxins. We responded by adjusting the purification step, opting for new resin beds that extract more impurities with each cycle. While this increased overhead, it secured us spots on rosters of multinational buyers who might otherwise look overseas. Our technical support lines field queries on how to verify contaminant levels and run in-house tests; we freely share our methods and raw chromatograms, because secrecy rarely builds trust across the supply chain.

    We’ve responded to customer innovations by adjusting particle size options, too. A few pilot projects in crop protection highlighted that smaller particle sizes improved end-use performance in certain formulations, but operator complaints about dust led us to develop dust-suppressed grades. This sort of feedback loop shapes our product lineup more than marketing alone ever could. Industry experience tells us that listening wins loyalty more reliably than price cuts.

    Supply Assurance and Traceability: Key to Long-Term Partnership

    Supply disruptions create havoc for both us and our buyers. Recent years brought raw material shortages and logistics bottlenecks, but our site footprint—combined with direct supply agreements with upstream chlorinated intermediates producers—lets us lean on long-standing relationships when shortages hit. We keep strategic safety stock in plant, calculated from past demand surges, so that orders maintain consistent lead times outside sudden force majeure events.

    Supply chains demand transparency. We tag every bulk shipment with full traceability, tied directly to our synthesis records, including dates, purification cycles, and final QC signoffs. Our clients sometimes face audit requests not just from regulators, but also from their own internal compliance teams. Losing traceability can mean lost business or months of administrative remediation. We honor our responsibility for chain-of-custody data as more than just a formality; it becomes a talking point with both procurement and on-the-floor production leads regularly.

    The Impact of Industry Standards and Sustainability

    Current market discussions fixate on green chemistry and lifecycle footprints. Pyridine derivatives, especially highly chlorinated ones, come under scrutiny for their manufacturing impacts. We spent years refining our methods to minimize waste acid streams and recycle solvents, realizing that waste mitigation ties directly to both economics and corporate reputation. Anything not captured at the plant gate can turn into a costly remediation years later.

    Over the past five years, we’ve implemented closed-loop chlorination systems, solvent recovery arrays, and switched to locally sourced reagents with verified supply chains. These steps improved yield but also slashed our end-of-pipe environmental liabilities—a reality that suppliers playing short-term games don’t always appreciate until regulatory visits upend old business models.

    Technical managers and sustainability officers among our buyers regularly ask pointed questions about energy use and by-product handling. Recognizing these trends early allowed us to adapt our own quality and documentation systems. We don’t claim perfection, but focusing on environmental impact now anticipates questions likely to surface in coming years as ESG reporting creeps into all segments of the chemical industry.

    Practical Lessons Learned on Downstream Effects

    Each time a new application for 2,3,5,6-tetrachloro-4-(methylsulfonyl)pyridine emerges, the chain reaction runs both ways: we gain insight into final product requirements and tighten our own output specs. We learned firsthand that smaller, faster-growing companies want speedy, direct access to our technical staff, not just safe, reliable supply. This two-way feedback gives us a unique window into industry changes and the sort of flexibility to adjust quickly.

    In one notable collaboration, a client developing a targeted post-emergence herbicide flagged subtle changes in application efficacy after switching to less-pure material from a different source. Our in-house trials mapped the contaminant profiles, adjusting our purification until their bioassays stabilized again. These cycles of diagnose-adjust-repeat buttress the trust that keeps our product on spec and in use for high-value chemistries.

    Why Specification Details Make or Break Success in Real Operations

    Buyers seeking premium intermediates often express frustration about inconsistency and reliability down the line. Material that meets a generic data sheet can still create unplanned operational pain—from dust explosions to slow-reacting feedstocks. Our experience proves that specification isn’t just about numbers; it’s the result of daily decision-making by operators, engineers, and managers who see the same facilities every day, not just on audit visits.

    We flag every deviation, no matter how minor, in our records. Clients now expect tight specs on particle size, color, melting range, and moisture. Each affects line stability, downtime, and sometimes end-product regulatory standing. We learned that adjusting specifications to suit individual clients brings long-term returns, as these partnerships grow into multi-year supply agreements.

    Looking Ahead: Preparedness, Adaptation, and Collaboration

    Markets for tailored chemical intermediates evolve without warning, and regulatory shifts can pivot demand overnight. Successful manufacturers anticipate and act. Our investment in process upgrades, worker training, documentation, and sustainability planning reflects plain lessons earned through years of plant-floor challenges and customer crises solved together. Supply chain reliability, technical engagement, and responsible stewardship shape 2,3,5,6-tetrachloro-4-(methylsulfonyl)pyridine’s value far more than any data sheet alone.

    Direct communication with technical buyers, production supervisors, and R&D specialists gives us a view of where the field heads next. As technologies in agrochemicals, specialty pharmaceuticals, and industrial syntheses push innovators to demand purer, more reliable intermediates, we stand ready to adjust in real time. Our history with this compound proves that the true measure of success runs deeper than initial specs or price tags—it’s about staying credible, consistent, and safe through each cycle of industry change.