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5-Chloro-3-Methylbenzo[B]Thiophene-2-Sulfonamide

    • Product Name 5-Chloro-3-Methylbenzo[B]Thiophene-2-Sulfonamide
    • Alias 5-Chloro-3-methyl-1-benzothiophene-2-sulfonamide
    • Einecs 629-007-6
    • 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

    975791

    Chemical Name 5-Chloro-3-Methylbenzo[B]Thiophene-2-Sulfonamide
    Molecular Formula C9H8ClNO2S2
    Molecular Weight 261.75 g/mol
    Cas Number 852678-07-0
    Appearance Off-white to pale yellow solid
    Purity Typically >98%
    Solubility Slightly soluble in DMSO, insoluble in water
    Boiling Point Decomposition before boiling
    Storage Conditions Store at 2-8°C, dry and tightly closed
    Synonyms 5-Chloro-3-methyl-1-benzothiophene-2-sulfonamide
    Smiles CC1=C(C2=CC=C(C=C2S1)Cl)S(=O)(=O)N
    Inchi Key KKHRJNQAJJXDDQ-UHFFFAOYSA-N

    As an accredited 5-Chloro-3-Methylbenzo[B]Thiophene-2-Sulfonamide factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.

    Packing & Storage
    Packing The packaging is a sealed amber glass bottle, containing 10 grams of 5-Chloro-3-Methylbenzo[B]Thiophene-2-Sulfonamide, labeled with safety and identification information.
    Shipping 5-Chloro-3-Methylbenzo[B]Thiophene-2-Sulfonamide is shipped in tightly sealed containers, protected from light and moisture. It is classified as a chemical reagent for research use only and must be handled according to relevant safety regulations. Shipping follows chemical hazard protocols and may require temperature control and appropriate hazard labeling.
    Storage Store **5-Chloro-3-Methylbenzo[B]Thiophene-2-Sulfonamide** in a tightly sealed container, protected from light and moisture, in a cool, dry, well-ventilated area. Keep away from incompatible substances such as strong acids, bases, and oxidizers. Ensure proper labeling and restrict access to trained personnel. Follow all relevant chemical safety protocols and local regulations for storage and handling.
    Application of 5-Chloro-3-Methylbenzo[B]Thiophene-2-Sulfonamide

    Applications of 5-Chloro-3-Methylbenzo[B]Thiophene-2-Sulfonamide in Industrial Manufacturing

    5-Chloro-3-Methylbenzo[B]Thiophene-2-Sulfonamide plays a critical role as a high-value building block in advanced chemical synthesis, finding concrete downstream adoption in the pharmaceutical intermediates sector, specialty agricultural chemicals production, fine dyes manufacturing, and select performance polymer additives. As an original producer, we support precise integration into customer-specific manufacturing lines with quality and process traceability throughout.

    1. Pharmaceutical Intermediates for Sulfonamide Drug Synthesis

    This compound is widely adopted in the synthesis of second- and third-generation sulfonamide-based pharmaceutical intermediates, serving as a core starting material to construct target molecular frameworks through nucleophilic aromatic substitution and further derivatization. Incorporation typically takes place at the condensation or cyclization stage when engineering advanced antibiotic and diuretic actives, particularly in commercial production of regulated API-side chains. Downstream partners prioritize traceable source, high purity, and GMP-ready inputs to safeguard compliance and batch consistency.

    Industry compliance standards

    • ICH Q7 Good Manufacturing Practice for Active Pharmaceutical Ingredients
    • U.S. FDA 21 CFR Part 211
    • European Pharmacopoeia Monographs (as reference for final APIs)
    • China GMP 2020 Revision

    Typical usage ratio

    • 0.6–1.3 molar equivalents relative to target core structure, adjusted for yield and byproduct minimization

    Downstream process integration

    • Introduced at intermediate synthesis step, typically through solvent-phase condensation or direct sulfonamide coupling before final purification

    Final product types

    • Antibacterial sulfonamide APIs (e.g., sulfamethoxazole derivatives)
    • Thiazide diuretic intermediates
    • Anti-infective precursor compounds
    • Specific R&D tool compounds for custom NCE development

    2. Specialty Agrochemical Synthesis

    Leading agrochemical formulators use this sulfonamide-functionalized thiophene as a key intermediate for synthesizing novel crop protection agents, especially selective herbicide precursors and fungicide component scaffolds. Its aromatic-sulfonamide reactivity enables efficient coupling with core moieties, facilitating downstream scale-up and purity control. Process teams must address both regulatory residue thresholds and technical crop safety demands during integration.

    Industry compliance standards

    • FAO/WHO Codex Alimentarius: Pesticide Residue Limits
    • OECD Good Laboratory Practice (GLP) for agrochemicals
    • China GB/T 31270 Requirements for Pesticides Production
    • EU Regulation (EC) No 1107/2009 (Plant Protection Products)

    Typical usage ratio

    • 5–18% by total mass of technical intermediate batch, ratio tuned for selectivity and minimal byproduct formation during coupling

    Downstream process integration

    • Fed into core synthesis reactor after initial activating ester/acid halide preparation; goes through high-shear mixing or controlled temperature coupling

    Final product types

    • Selective benzo[b]thiophene-derived herbicide technicals
    • Sulfonamide-type fungicide intermediates
    • Seed treatment development compounds

    3. Synthesis of Functional Dyes and Pigments

    Dye formulators rely on this aromatic sulfonamide for constructing thiophene-based chromophores that offer custom electronic absorption features and superior environmental stability. Its introduction enables designers to expand color space or fine-tune fastness profiles for demanding textile and technical coating uses. Batch control and contaminant traceability are enforced throughout pigment isolation and blending.

    Industry compliance standards

    • OEKO-TEX® Standard 100 (for restricted substances in textiles)
    • REACH Regulation (EC) No 1907/2006
    • ISO 9001:2015 Quality Management for colorants
    • ETAD/AGET QA Guidelines for Synthetic Dyes

    Typical usage ratio

    • 2–9% of total dye precursor mass, subject to chromophore design and purity target of the final colorant

    Downstream process integration

    • Charged to synthesis kettle at intermediate addition phase, coupling with diazonium salts or aromatic aldehydes before condensation and isolation

    Final product types

    • Sulfonamide-thiophene reactive dyes for cotton
    • High stabilities pigments for plastics coloring
    • Specialty technical ink colorants

    4. Performance Polymer Additive Precursor

    Advanced materials manufacturers introduce this compound into the synthesis pathway of functional polymers, where its sulfonamide group modulates charge transport and compatibility in specialty engineering resins. Typical applications demand high-melting or conductive polymers for electronics encapsulation or industrial coatings. Stringent documentation and batch uniformity are required for downstream process qualification and regulatory audits.

    Industry compliance standards

    • RoHS Directive 2011/65/EU (for electronics applications)
    • UL 94 V-0 Flammability Standard (polymeric parts)
    • ISO 14001:2015 Environmental Management (polymer sector)
    • IEC 61249-2-21 for halogen-free materials (if used in PCB lamination)

    Typical usage ratio

    • 0.5–3% by resin mass, staged addition based on desired modifications of electrical or thermal profile during polymerization

    Downstream process integration

    • Added at monomer blending phase before polycondensation or melt processing; enables covalent bonding or functional group grafting within resin matrix

    Final product types

    • Functionalized engineering plastics for electronics housings
    • High-performance polymer blends used in cable insulation
    • Coatings for printed circuit board protection
    Free Quote

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    Certification & Compliance
    More Introduction

    Introducing 5-Chloro-3-Methylbenzo[B]Thiophene-2-Sulfonamide: Manufacturer’s Perspective

    Understanding the Core of 5-Chloro-3-Methylbenzo[B]Thiophene-2-Sulfonamide

    Within the world of benzo[b]thiophene derivatives, few compounds stand out like 5-Chloro-3-Methylbenzo[B]Thiophene-2-Sulfonamide. As experienced chemical manufacturers, our work often moves well beyond simply blending reagents — we’re after the kind of purity, consistency, and technical control that define a product’s reliability in demanding research and production environments. This particular molecule, known for its aromatic thiophene backbone substituted with chlorine and methyl, delivers a distinct balance of reactivity and selectivity, making it suitable for challenging applications across industries where structural nuance impacts outcomes.

    The name alone carries some weight, hinting at how each functional group embedded in the scaffold comes with its own purpose. That sulfonamide group invites interest from pharmaceutical and agrochemical developers, who look for potent bioactive cores or scaffolds ready for fine-tuning. The chlorine and methyl groups both skew the electron density of the system, shaping how the compound interacts with other molecules. Designing and controlling these structural subtleties requires real hands-on process knowledge, especially in avoiding tricky side reactions and consistently meeting customer requirements. Years of manufacturing experience have taught us what it takes to build this molecule at scale without drift in its chemical profile.

    Practical Applications: Field Experience in Action

    Research laboratories and commercial innovators alike value a reagent that doesn’t throw surprises. Over countless batches, we’ve found 5-Chloro-3-Methylbenzo[B]Thiophene-2-Sulfonamide quietly supports intricate synthetic routes. Medicinal chemists often pursue benzo[b]thiophene derivatives as they develop new leads for oncology, immunological, or infectious disease drugs. Here, the sulfonamide group unlocks hydrogen bonding capacity and, sometimes, improves solubility profiles in downstream analogues. Structural modifications on the ring offer new synthetic ports — the methyl or chloro functionalities open pathways for selective substitutions, coupling, or ring closures under mild conditions.

    In the agrochemical sector, thiophene cores show up time and again in active ingredient development. The specific pattern of ring substitution in this compound serves as a valuable starting point, whether customers head toward herbicide, fungicide, or insecticide discovery. Farm researchers probing resistance mechanisms or optimizing crop protection benefit from high-conversion, low-impurity sulfonamides. Working alongside their teams, we’ve supplied custom batches and seen firsthand how minor tweaks — perhaps in particle size or moisture content — can break bottlenecks in product formulation or scale-up.

    Manufacturing Insights: From Synthesis to Consistency

    Building 5-Chloro-3-Methylbenzo[B]Thiophene-2-Sulfonamide at industrial scale poses challenges distinct from standard benzo[b]thiophenes. Managing the precise placement of the chloro and methyl groups often means walking a tightrope; over-chlorination or methyl migration can spoil a batch. True consistency doesn’t come from a recipe — it comes from years invested in process engineering, rigorous control over solvent quality, reaction atmosphere, and purification protocols.

    Our reactors use a carefully mapped sequence of sulfonation, selective halogenation, and methylation, supported by real-time analytics. Each step is checked, not just at the endpoints, but at transition points along the route. Experience shows small variations in reagent grade or temperature profiles can lead to impurity build-up, reducing overall product value. Take it from seasoned process chemists: keeping batch-to-batch reproducibility high is not about special slogans — it’s a matter of disciplined attention, tailored clean-up methods, and fast problem-solving on the line.

    Regulatory, Traceability, and Sustainable Production

    As regulations tighten and standards grow tougher, traceability has never mattered more. Our teams track every drum back to the initial raw materials, not just for our records but for our customers’ peace of mind. It’s common for finished products to head into regulated pharmaceutical or agrochemical pipelines, so every intermediate requires full documentation and trace analysis. The growing prominence of sustainability also means we’re taking a harder look at each step in the synthetic route. Our in-house audits are less about chasing certification and more about finding real improvements: reducing energy use, managing solvent waste, and avoiding polluting byproducts.

    For instance, older thiophene sulfonation pathways would generate acidic effluents, raising both compliance risk and disposal costs. Our modern process integrates solvent recovery and in-line neutralization, so waste streams exit much cleaner. Experience chasing down sources of trace heavy metals or residual organics has helped us develop detection protocols that find problems sooner, cutting batch rejections and delivering tighter lots for our partners.

    Comparing with Other Benzo[B]Thiophene Derivatives

    Customers often approach us to ask about the differences between our 5-Chloro-3-Methylbenzo[B]Thiophene-2-Sulfonamide and more common benzo[b]thiophene products. In our experience, the presence of both a sulfonamide and a halogen makes this molecule a better fit for specialized applications where increased binding or selective reactivity helps advance project goals. Basic benzo[b]thiophene or monosubstituted analogues lack the dual-functional flexibility found here, closing off some synthetic avenues or pharmacological profiles. The methyl group at the 3-position tweaks electron release onto the ring, giving greater control during electrophilic substitution reactions — a clear advantage for researchers trying to build higher-order libraries.

    This product’s appeal often lies in its easy adaptation for either direct use or advanced modifications. Where a plain sulfonamide won’t stick well on a complex carrier, ours often persists thanks to its tailored substituents. For example, in combinatorial chemistry, synthesizing libraries of analogs demands starting points already amenable to stepwise customization. In crop-protection applications, extra chlorination offers potential to overcome enzyme breakdown when used as an active ingredient core. Our formulation teams have seen these details make or break a candidate’s progress in field trials or regulatory review.

    Delivering on Specifications: Bridging Lab and Industry Needs

    Supplying a high-value intermediate isn’t just about purity in the percentiles — it’s about knowing what downstream users expect. For 5-Chloro-3-Methylbenzo[B]Thiophene-2-Sulfonamide, we’ve refined polymorph controls and moisture management to meet even narrow specifications. Customers working in high-throughput medicinal chemistry screening will often request grams, then pivot to kilos once a series shows promise. Industrial buyers focused on crop science need dry, free-flowing material that doesn’t cake or clump during storage. Both situations call for tight particle size distribution and confirmed absence of residual metals, solvents, or high-level organic byproducts.

    Our in-process samples regularly head to advanced chromatographic and spectrometric analysis. We run checks for not only overall purity but trace chlorinated or sulfonated side-products. Over the years, we’ve tuned our drying and milling procedures to avoid thermal decomposition or aggregation that can ruin dissolution and reactivity in the end use. These are problems many customers only recognize after wasted time in the lab, but we’ve learned to anticipate them, reducing frustration and keeping projects on track.

    Beyond purity, batch homogeneity truly matters. We focus on consistent mixing and controlled crystallization, especially for customers scaling up from 10-gram experiments to 100-kilogram production. Even small shifts in bulk density or moisture content can bring production lines to a standstill or reduce assay yields. Our teams draw not just from technical literature but from years manning the plant: real-world runs that teach where bottlenecks arise and what tweaks help maintain process momentum from first to final drum.

    Customer Collaboration: Solving Problems Together

    Good chemistry stems from open conversation and a drive toward practical solutions. Over the years, partnering with pharmaceutical and agrochemical developers brought us plenty of challenges: sometimes a lead candidate needs a modified variant, or a pilot plant trial produces unexpected byproducts. In those situations, we’ve found proactive engagement works best. Sharing real data and opening our process lines for joint review, we’ve helped clients adapt analytical methods or tweak synthetic routes to better work with our material.

    Some projects required custom batch sizes or unique purity cuts — rather than dictating minimum orders, we’ve learned to run smaller lots and rapid response syntheses for pilot studies. If a customer’s application calls for chromatography-ready powders, we’ll adjust particle size or add extra filtration stages. This flexibility often beats impersonal commodity production, and our team thrives on working up safe, actionable modifications using the knowledge built over decades.

    Regulatory hurdles and supply-chain complexity never seem to let up. Whenever a customer’s inquiry runs beyond standard sales, we bring in process development or regulatory affairs to map out safe, compliant solutions. Whether it’s a request for fresh stability data or a question about residual solvents, our staff prioritize direct communication over canned responses or copy-paste answers. Over time, building these relationships has kept projects moving and, on more than one occasion, allowed us to trouble-shoot major disruptions before they sparked downstream losses.

    Troubleshooting and Continuous Improvement

    All products bring technical problems now and then. Our journey with 5-Chloro-3-Methylbenzo[B]Thiophene-2-Sulfonamide is no exception. Early process development taught us some painful lessons about trace contamination. It turned out that even minor corrosion in reactor lines could spike iron or copper levels at final QC, requiring costly reworks. By moving to lined vessels and tighter monitoring, we cut down on these issues. Analytical surprises also pop up: small secondary peaks in HPLC forced a deep dive into process kinetics, leading us to install progressive quenching protocols that reduced unwanted byproduct formation.

    Scratching beneath the surface, we’ve seen stubborn caking, sticking, or flow problems at higher throughputs. Rather than swap suppliers or blame batch variability, our team invested in new drying curves and hybrid fluid bed technologies. This paid off in more stable handling and reduced customer complaints about material hang-ups in their feeders. These process tweaks may not make headlines, but over the long haul, they protect both product quality and partner confidence.

    Continuous improvement evolves from listening to field feedback. When researchers describe problems at the bench — a too-slow dissolution or inconsistent reaction times — we dig into the details, running joint tests or evaluation syntheses. Sharing in the ups and downs, we’ve found overlooked quirks in particle shape or surface tension that impact downstream chemistry. Addressing these directly, we save our partners time and help drive projects toward practical discovery and commercial success.

    Staying on the Cutting Edge: Adapting Techniques and Future Directions

    New applications for benzo[b]thiophene derivatives continue to emerge, and we make it a point to stay current on both process improvements and evolving market needs. Process intensification trends — continuous flow synthesis, advanced crystallizations, data-driven monitoring — all shape how we adapt our facilities. It isn’t about chasing every fad, but about choosing approaches that support consistent outputs and faster response times.

    For example, moving toward greener chemistry has shifted some synthetic steps from older halogenated solvents to safer, more recyclable alternatives. We track advances in catalysis and coupling chemistry, bringing them in once they hit a maturity level that balances risk and reward. As more customers request customized derivatives, our R&D staff leverage the established 5-Chloro-3-Methylbenzo[B]Thiophene-2-Sulfonamide scaffold to quickly build new analogs, cutting lead times for pilot-scale supply.

    Staying responsive in this market isn’t always about speed alone. Reliability and technical support still matter most. By bridging the gap between the lab and the industrial site, we keep projects on steady ground, anticipating needs before they turn urgent. Our years of working in real chemical plants — not just writing product flyers — have built this culture, keeping our team connected to the realities our customers face every day.

    Conclusion: Why 5-Chloro-3-Methylbenzo[B]Thiophene-2-Sulfonamide Matters

    5-Chloro-3-Methylbenzo[B]Thiophene-2-Sulfonamide serves as a reliable anchor for those seeking chemical innovations with more predictability. Compared with simpler benzo[b]thiophene derivatives or off-the-shelf sulfonamides, its unique structure and tailored functionality provide real tools for synthetic chemists, pharmacologists, and crop science specialists. The journey to manufacturing excellence isn’t paved with theory — it comes in the form of tight quality controls, a clear-eyed view of process hazards, and hands-on collaboration across the supply chain.

    Every day, new challenges test these systems, whether in chasing regulatory compliance, ramping up for commercial supply, or troubleshooting technical setups at the customer’s end. As a manufacturer continuously engaged with both process science and real-world application, we focus not just on molecular detail but on the practical outcome of each batch: the confidence it brings to our partners and the knowledge that every drum delivered stands on years of experienced stewardship.