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2-Methylbenzo[B]Thiophene

    • Product Name 2-Methylbenzo[B]Thiophene
    • Alias 2-Methyl-1-benzothiophene
    • Einecs 210-951-4
    • 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
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    Specifications

    HS Code

    840801

    Chemicalname 2-Methylbenzo[b]thiophene
    Casnumber 4965-37-7
    Molecularformula C9H8S
    Molecularweight 148.23
    Appearance Colorless to pale yellow liquid
    Meltingpoint 6-8°C
    Boilingpoint 247-249°C
    Density 1.14 g/cm3 (at 25°C)
    Refractiveindex 1.638
    Purity ≥98%
    Solubility Insoluble in water, soluble in organic solvents
    Smiles CC1=CC2=CC=CC=C2S1
    Inchikey YLNVBDLKNJOCHP-UHFFFAOYSA-N

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

    Packing & Storage
    Packing Amber glass bottle containing 25 grams of 2-Methylbenzo[B]Thiophene, labeled with hazard symbols, product details, and safety instructions.
    Shipping **Shipping Description for 2-Methylbenzo[B]Thiophene:** Ships in secure, sealed containers suitable for organic chemicals. Store and transport at ambient temperature in compliance with local and international chemical shipping regulations. Handle with care to avoid leaks or exposure. Accompany with safety documentation, including SDS, and label as a flammable organic compound as appropriate.
    Storage 2-Methylbenzo[B]thiophene should be stored in a tightly sealed container, kept in a cool, dry, and well-ventilated area, away from heat, sparks, and sources of ignition. Protect from strong oxidizers and direct sunlight. Avoid moisture, and store at room temperature. Clearly label the container and restrict access to authorized personnel only, following all safety and regulatory guidelines.
    Application of 2-Methylbenzo[B]Thiophene

    Applications of 2-Methylbenzo[B]Thiophene in Industrial Manufacturing

    2-Methylbenzo[B]Thiophene provides unique aromatic and sulfur functionalization for several specialized downstream sectors. Drawing on our experience as an industrial-scale producer, we support application engineers and procurement teams with consistent quality and technical data suited to real-world manufacturing challenges. Below, we detail significant application scenarios—each reflecting current, traceable industry practice—including relevant compliance, formulation, process step, and finished product information.

    1. Synthesis of Advanced Pharmaceuticals Intermediates

    Pharmaceutical manufacturers use 2-Methylbenzo[B]Thiophene as a privileged scaffold for the synthesis of complex API intermediates, particularly in the preparation of heterocycle-rich drug candidates and active metabolites. Its reactivity supports precise modifications in pilot and commercial batch operations, meeting the requirements for safe and traceable feedstocks under regulated conditions.

    Industry compliance standards

    • ICH Q7 Good Manufacturing Practice (GMP) for Active Pharmaceutical Ingredients
    • United States Pharmacopeia (USP) General Chapter <761> for impurities and identification
    • European Pharmacopoeia (Ph. Eur.) monographs on starting materials
    • FDA 21 CFR Part 211 for finished pharmaceuticals

    Typical usage ratio

    • Employed at 0.5–2.2% molar equivalents as a core synthon in multi-step synthesis; adjusted for target molecule yield and step efficiency

    Downstream process integration

    • Charged into API or intermediate vessel after initial solvent loading, frequently under inert gas, before subsequent functionalization reactions such as halogenation, acylation, or metal-catalyzed coupling

    Final product types

    • Pharmaceutical actives for oncology, CNS, and inflammation therapies
    • Heterocyclic intermediate APIs
    • Specialty metabolites for drug research

    2. Fluorescent Dye and OLED Material Synthesis

    Advanced display and lighting industries utilize this material as a key intermediate in organic dye and electroluminescent molecule synthesis—critical for manufacturers developing high-purity performance dyes and emitters for OLED panels. The aromatic-sulfur framework supports high quantum efficiency and color purity in ensuing materials.

    Industry compliance standards

    • ISO 9001:2015 Quality Management Systems
    • RoHS Directive (2011/65/EU) for restriction of hazardous substances in electronics
    • IEC 62321 for the determination of banned substances in electronic products
    • Internal QC protocols for dye and OLED intermediate purity, including HPLC and GC-MS trace impurity checks

    Typical usage ratio

    • Used at 0.8–3.5% by weight in precursor feed for coupling or cyclization, with loading tailored to molecular design targets for chromophore efficiency

    Downstream process integration

    • Fed directly into the early stage dye-synthesis reactors or metal-catalyzed coupling steps preceding post-synthetic purification and device-specific blending

    Final product types

    • Blue and green OLED emitter molecules
    • Photoluminescent dyes for display technologies
    • Organic laser dyes for spectroscopy equipment

    3. Agrochemical Active Ingredient Manufacturing

    Chemical crop protection formulators and agrochemical ingredient producers use 2-Methylbenzo[B]Thiophene as a building block in sulfur-heterocycle-containing herbicides and fungicides. Manufacturers rely on batch-to-batch purity and precise reactivity to meet both efficacy and residue standards in regulated markets.

    Industry compliance standards

    • FAO/WHO Specifications for Plant Protection Products
    • EU Regulation (EC) No 1107/2009 for plant protection products
    • ISO 17025-certified laboratory methods for contaminant control
    • OECD guidelines for the testing of chemicals—Section 508: Residues in food analysis

    Typical usage ratio

    • Typically 0.5–1.8% by mole when used as a core ring in multi-step synthesis for final actives; ratios adjusted for downstream synthetic yield and crop specificity

    Downstream process integration

    • Incorporated following initial chlorination or acylation reactions in the active-ingredient synthesis line, with subsequent purification and formulation into technical concentrate

    Final product types

    • Selective herbicide actives
    • Fungicide intermediates used in foliar spray formulations
    • Seed coating agents for major grains

    4. Fragrance Ingredient and Aroma Compound Synthesis

    Flavor and fragrance compound manufacturers exploit the aromatic and sulfur notes in 2-Methylbenzo[B]Thiophene to create specialty aroma ingredients. These compounds impart earthy, leathery, and smoky bases, supplying blending houses for fine perfume and personal care product development under controlled sensory standards.

    Industry compliance standards

    • IFRA (International Fragrance Association) standards
    • EU Regulation (EC) No 1223/2009 for cosmetic products
    • ISO 9235 for natural aromatic raw materials definition
    • REACH Regulation (EC) No 1907/2006 chemical registration requirements

    Typical usage ratio

    • Added at 0.1–0.7% by weight in synthetic aroma compound blends, adjustable for end-product intensity and olfactory profiles required by fine fragrance formulators

    Downstream process integration

    • Charged after main solvent phase and prior to esterification or reduction, followed by distillation and fine fraction collection for perfumery base stocks

    Final product types

    • Fragrance concentrates for fine perfume
    • Aroma chemicals for luxury soaps and creams
    • Flavor ingredients for tobacco blending

    5. Custom Monomer and Polymer Precursor Synthesis

    High-performance materials developers exploit the unique aromatic thiophene core in this compound to prepare specialty monomers and advanced polymer building blocks. Its inclusion supports tailored electronic, thermal, and mechanical properties in the resulting functional polymers designed for microelectronic and high-stability applications.

    Industry compliance standards

    • ISO 14001 Environmental Management System for polymer manufacturing
    • RoHS Directive for polymer use in electronics
    • UL 94 standards for flammability of plastics in electronics and appliances
    • Company-specific technical data sheet QC controls

    Typical usage ratio

    • Introduced at 1.0–4.5% by mass relative to the core monomer composition; adjusted on the basis of intended polymer chain distribution and target end-use environment

    Downstream process integration

    • Polymerization initiators charge this material in pre-polymer mix stages, with further copolymerization and post-processing purification before extrusion or molding

    Final product types

    • Polythiophene-based functional polymers
    • Conductive polymer films for microelectronics
    • Specialty resins with elevated sulfur content for capacitor and sensor applications
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    Certification & Compliance
    More Introduction

    2-Methylbenzo[B]Thiophene: Focused Performance for Specialty Synthesis

    Distinct Structure, Reliable Consistency

    Over the last decade, demand for specialized sulfur-containing heterocycles has gained attention across development laboratories and production lines. 2-Methylbenzo[B]thiophene delivers a unique combination of attributes we refine continuously at our manufacturing site. Our process begins with hand-selected feedstocks and follows a sequence of steps built through practical experience, rather than following just textbook routes. Every step gets reviewed and fine-tuned by technicians who have spent years with sulfur chemistry — that shows up in our typical GC purity running above 98%.

    The methyl group at the 2-position changes more than just the name. In organic synthesis, this small group sets the stage for directed functionalizations and opens up reaction pathways not accessible with benzo[b]thiophene alone. Process engineers turn to this isomer because it balances both reactivity and manageable volatility. Each batch gets packed under conditions minimizing light and atmospheric exposure, which are critical—methylbenzo[b]thiophenes can form colored impurities quickly if handled carelessly. That’s the level of vigilance developed on our shop floor.

    Specifications Forged from Practice

    Through hundreds of campaigns, the most frequently requested material comes as a colorless to pale yellow liquid, with a boiling range holding steady between 235-236 °C. We target moisture levels in the low ppm range—a detail that helps users avoid unpredictable hydrolysis or side reactions. Once, a customer reported minor odor development after storage; our quality taskforce traced it back to suboptimal drum closures, since fixed, and no similar complaints have surfaced in years.

    Particle size or melting point don’t matter here, since this molecule’s main value shows up in liquid-phase chemistry, not solid blends or tablets. Large-scale users appreciate our assurance that material leaves our plant only after passing not only purity and identity checks, but also a routine run through UV-Vis and NMR assessments. For research uses, extra 2D spectra and micro-contaminant screens can be arranged, but every customer receives the same high-content batch, never downgraded remainders.

    From Pilot Scale to Bulk: A Direct Line

    Most production takes place in reactors between 400 and 1,000 liters, though we scale up to multipurpose trains for seasonal surges. Rigid batch logs and in-process monitoring allow us to guarantee reproducibility. Over 80% of our output ships to organizations scaling up new pharmaceuticals or agrochemical candidates. They turn to us once their pilot routes call for tens of kilos to multi-ton quantities where supply gaps or variable purity put longer-term rollouts at risk. The history of our project management tells the fuller story—customers often send technicians to witness our process, underlining trust only earned by precise delivery over time rather than marketing.

    Packaging follows a proven system with lined drums, certified UN-approved carboys, and larger materials expertly filled under filtered nitrogen. Some clients request specific headspace controls; we oblige after validating inert atmosphere retention on a full-sized test lot. Once, a rush order required filling 200-liter drums overnight: our crew stayed on until first light, ensuring no shortcuts compromised trace residuals or closure safety.

    Not Just a Catalog Entry: Real-World Roles

    Users integrate 2-Methylbenzo[B]thiophene into a sweep of transformations, ranging from palladium-catalyzed couplings, lithiation, electrophilic substitutions, and oxidations. In nearly every instance, practitioners cite two core demands: the reagent must react cleanly, and side products should separate smoothly. Our practical familiarity with this molecule includes filtering out residual sulfur-containing byproducts without relying on heavy hydrogenation or labor-heavy distillation.

    We often field queries about differences from benzo[b]thiophene or 3-methylbenzo[b]thiophene. Core distinctions arise from the orientation of the methyl group—2-methyl facilitates regioselective reactions, where chemists exploit the electron-donating effect to target specific positions for further modification. The electronic and steric profile rules out undesired cross-linking or broad-spectrum polymerizations seen with some structural relatives.

    Pharmaceutical projects value this selectivity during route scouting. Sulfur-heterocycles serve as privileged scaffolds for kinase inhibitors, antibiotics, and CNS-focused molecules. The methyl substituent sometimes blocks metabolic oxidation, adding an edge in lead optimization stages. Agrochemical synthesis benefits similarly: building block quality means less end-product purification and lower heavy metal residue risks in field testing. Over time, recommendations and in-person audits by client chemists keep pushing us toward higher standards, from waste minimization to tightening endpoint specification bands.

    Handling Built on Cumulative Learning

    Sulfur aromatics deserve respect—casual storage or transfer opens up risk of off-odors, color darkening, or slow polymerization. Across years of hands-on work, we built a protocol from actual incidents in the plant. Direct sunlight hastens breakdown. Bottling lines now stand far from warehouse doors, and workers constantly monitor nitrogen lines for leaks.

    Long-haul shipments sometimes get disrupted by weather-induced delays—the result can be a drum with an odd top-layer film or trace discoloration. Instead of hand-waving, we offer immediate returns and diagnostic support to ensure integrity on arrival. One field chemist once called with concerns about an odd odor; our technical team identified a faulty gasket and cross-shipped a fresh container at our expense. Relationships built on this level of accountability stand firmer than third-party marketing promises or faceless dropship logistics.

    Quality Driven by Technician Insight

    Tuning process parameters over time stems from listening to lab feedback. We never blindly scale an academic procedure. Our plant's team logs every modification, and minor adjustments—reaction time, stirring profile, incoming feedstock analysis—compound to shape today’s product quality. Even solvent grade switches matter; on two occasions, trialing a new solvent batch flagged subtle yield changes. Technicians found minuscule metal traces from prior tank use. These stories shape better preventative steps—like closed-loop cleaning checks—rather than just trusting certificates.

    Every analysis method receives periodic validation based on customer feedback and internal review. Early in our production journey, a handling error led to an off-odor batch. Since then, new monitoring steps catch minor impurities ahead of time. This hands-on, evolving approach builds incremental knowledge no stock datasheet can capture. That’s the underlying layer distinguishing manufactured chemicals from generic bulk commodity supplies.

    Supply Chain Resilience: Lessons from Experience

    Market shocks, energy prices, and feedstock swings all test a supplier’s stability. Our senior operators learned years ago to dual-source key raw materials and reserve backup plant slots for critical items like 2-Methylbenzo[B]thiophene. On one occasion, customs delays at a port threatened to halt output. By drawing from in-house inventory and streamlining internal transfer permits, we filled orders on time. The lesson: reactive bulk purchasing rarely beats layered redundancy and close vendor collaboration cultivated over years.

    Transparency sets apart manufacturing partners from resellers. Customers benefit from seeing logs of every output lot, plus the rationale behind any procedural shifts. Certifications, trace analytics, and open audit trails lower the chance of regulatory surprises or batch rejection headaches. Regular audits from international clients — and occasional field visits from external chemists — keep our operation honest and adaptable.

    Environmental and Safety Commitments

    Handling sulfur aromatics imposes responsibility to plant workers, users, and surrounding communities. Our in-house waste treatment lines neutralize spent solvents and distillation residues. We periodically review air and effluent streams, always seeking to clamp down on odor and vapor traces. Most notably, we reinvest in recovery technologies that recycle and purify solvents for reuse, dramatically reducing our landfill footprint.

    Safety protocols grow from lived experience, not just compliance paperwork. Every operator receives targeted training, not only on spill and leak response, but also on early warning signs like off-color batches or container deformation. We share these lessons openly, both with newer staff and visiting customers, to broaden benchmarking and raise plant-wide awareness. Over the past three years, injury or exposure incidents tied to benzo[b]thiophene analogs have dropped to near zero — we attribute that drop not to luck, but to attention to detail by every team member.

    Looking Forward: Continuous Improvement

    As molecule demand shifts, practical updates become essential. Trends in reaction chemistry — from metal-free transformations to photochemical or electrochemical coupling routes — prompt ongoing process tweaks. We remain ready to adapt for low-ppm impurity requirements, specialized stabilizers, or green solvent integrations. Many new clients approach us needing input at the method development stage, counting on advice about how our manufacturing chain aligns with modern regulatory or traceability expectations.

    Some users require high-purity isolations for regulated studies, such as GLP or GMP investigations; our documentation includes detailed lot histories and full analytical runs from in-house and third-party labs. The manufacturing mindset isn't just about meeting one-off requests, but proactively studying emerging needs and factoring them into raw material contracts, waste management, and future expansion. Our team reviews every significant feedback item, holding weekly debriefings to determine if it signals a process improvement or equipment upgrade.

    Building Trust Through Transparency

    Customers sometimes ask about “real” differences between sourcing directly from a manufacturer versus trading through intermediaries. In practice, direct supply offers three advantages: guaranteed traceability from raw starting materials to final package; fast, informed technical support; and the flexibility for custom requests on timing, specification, or presentation. Our internal knowledge base includes not just SOPs and analytical printouts, but lived accounts — mistake logs, pilot trials, and customer visits — that build a deeper trust than price points alone.

    A recurring story involves a late change-order: one development team suddenly needed a lower moisture batch, outside the regular schedule. Because we maintain in-plant material ready for retesting or repackaging, we shipped ahead of deadline. The feedback: the process succeeded, and the project advanced without delay. Behind that outcome lay years of close operator-chemist communication, round-the-clock lab access, and pre-approved logistics procedures that can’t be conjured through opaque vendor networks.

    Why Sourcing Methods Matter

    Differences between 2-Methylbenzo[B]thiophene from various sources extend beyond grade claims on labels. Behind the scenes, length of distillation columns, filtration cycles, solvent handling, and post-processing steps all shape batch quality. We tailor every stage to handle typical lab and plant user scenarios: clear transfer lines, minimal headspace gas, carefully designed drum liners.

    Here, process history matters as much as output numbers. We keep every cleaning, batch record, and scale-up log accessible for review; clients can check how recurring problems were fixed over time. Early on, some customers were surprised to find we welcome inspection; our interest runs deeper than short-term deals. A mutual understanding of expectations replaces endless quality claims or hypothetical guarantees.

    Supporting Innovation in Downstream Chemistry

    Our engagement doesn’t end with shipment. Many users seek advice on reaction optimization, troubleshooting, or impurity scavenging. We host virtual or on-site visits with downstream formulating chemists and engineers, sharing tips discovered through experience: best solvent choices, blending techniques, and air-free transfer. Our in-house expertise supports method troubleshooting, helping resolve bottlenecks and avert costly setbacks. Compared with generic supply, the intellectual partnership between supplier and development team offers longer-term process advantages.

    As regulatory and data trace requirements tighten, end-users turn to vertical integration to minimize risk. We constantly update our documentation, validating procedures under ICH, REACH, and local guidelines. Each shipment arrives complete with certified analysis, but the real assurance comes through the full story — how we obtain, store, test, and support this specialty compound.

    Commitment to Ethical and Sustainable Production

    The social expectations for chemical producers continue to rise. We adopted emission monitoring, solvent recycling, and zero-landfill targets before such steps were common industry practice. Internal review boards, regular safety audits, and supplier screening deepen our sense of responsibility. Operators propose and carry out waste reduction ideas; these efforts get factored into future planning reviews. Local regulators recognize our site not for perfect paperwork, but for a measurable drop in off-site complaints and improved groundwater readings.

    Summary

    2-Methylbenzo[B]thiophene’s role in synthetic chemistry is defined not just by its molecular structure, but by the elbow grease, knowledge, and diligence applied across each manufacturing run. Differences from other benzo[b]thiophenes show up at the bench, in reactivity, handling, and reliability. Consistent, high-purity supply draws from living, evolving practice — a combination of operator experience, tight process control, and fully transparent supply logs. Users value end-to-end confidence, not generic commodity promises. That’s the strongest foundation for success in today’s competitive, demand-driven chemistry landscape.