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2,8-Dimethyldibenzothiophene

    • Product Name 2,8-Dimethyldibenzothiophene
    • Alias DMBT
    • Einecs 217-636-5
    • 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

    990587

    Cas Number 16721-39-0
    Molecular Formula C14H12S
    Molecular Weight 212.31 g/mol
    Iupac Name 2,8-dimethyldibenzo[b,d]thiophene
    Appearance White to off-white solid
    Melting Point 97-99°C
    Boiling Point 357°C (estimated)
    Density 1.18 g/cm³ (estimated)
    Solubility In Water Insoluble
    Structure Type Polycyclic aromatic sulfur heterocycle
    Smiles CC1=CC2=C(C=C1)SC3=C2C=CC(=C3)C
    Pubchem Cid 173463
    Flash Point >150°C (estimated)
    Stability Stable under recommended storage conditions

    As an accredited 2,8-Dimethyldibenzothiophene factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.

    Packing & Storage
    Packing A 25-gram amber glass bottle with a secure screw cap, labeled "2,8-Dimethyldibenzothiophene," hazard warnings, and CAS information.
    Shipping 2,8-Dimethyldibenzothiophene is shipped in tightly sealed containers, protected from light, moisture, and incompatible substances. It should be labeled according to applicable chemical regulations and transported in compliance with local, national, and international shipping guidelines for hazardous materials. Ensure appropriate documentation and handling precautions during shipping to maintain safety and product integrity.
    Storage 2,8-Dimethyldibenzothiophene should be stored in a tightly closed container, in a cool, dry, and well-ventilated area, away from sources of ignition and incompatible substances such as strong oxidizing agents. Keep it protected from direct sunlight and moisture. Ensure appropriate labeling and store according to relevant chemical safety guidelines, employing secondary containment as necessary to prevent spills or leaks.
    Application of 2,8-Dimethyldibenzothiophene

    Applications of 2,8-Dimethyldibenzothiophene in Industrial Manufacturing

    2,8-Dimethyldibenzothiophene is a specialty organic intermediate vital to several advanced chemical industries. Our manufacturing focuses on delivering high-purity material for critical applications where performance, regulatory compliance, and formulation consistency are essential. Below, we describe proven industry applications where our product is used by downstream processors worldwide.

    1. Reference Standard Preparation for Analytical Laboratories

    Certified reference standards containing 2,8-dimethyldibenzothiophene play a key role in calibrating and validating analytical equipment for sulfur content determination in the petroleum sector. Laboratories rely on precise and traceable reference mixtures to ensure ongoing quality control of fuel products. Our material is used by certified test facilities and regulatory compliance labs.

    Industry compliance standards

    • ISO 17034 – General requirements for the competence of reference material producers
    • ASTM D2622 – Standard Test Method for Sulfur in Petroleum Products by Wavelength Dispersive X-ray Fluorescence Spectrometry
    • EN 16900 – Petroleum products – Analytical requirements for sulfur reference materials
    • ISO/IEC 17025 – General requirements for the competence of testing and calibration laboratories

    Typical usage ratio

    • 0.5 to 5 mg/kg, precisely weighed to meet calibration range needs for analytical methods

    Downstream process integration

    • Dissolution in solvent blends and accurate gravimetric mixing to prepare calibration and check standards for chromatographic or XRF analyzers

    Final product types

    • Sulfur standard solutions for diesel and gasoline testing
    • Certified reference materials for laboratory proficiency testing schemes

    2. Synthesis of Polymer Additives for Advanced Plastics

    Downstream specialty chemical manufacturers utilize 2,8-dimethyldibenzothiophene as a precursor in the synthesis of high-performance polymer additives. These additives enhance thermal stability and UV resistance in engineering plastics used in electronic housings and automotive applications. Consistent material purity is essential for producing additives that meet strict formulation standards demanded by the electronics and transport sectors.

    Industry compliance standards

    • REACH Regulation (EC) No 1907/2006
    • RoHS Directive (EU) 2011/65/EU
    • UL 94 Flammability Standards for Plastic Materials
    • IEC 61249-2-21 for halogen-free materials in electronics

    Typical usage ratio

    • 0.2 – 1.0% by weight in masterbatch formulations, adjusted based on resin base and target performance criteria

    Downstream process integration

    • Fed into batch or continuous reactors during the synthesis of thioether-based antioxidant or UV absorber additives

    Final product types

    • Antioxidant masterbatches for polycarbonate and polyamide plastics
    • UV stabilizers for automotive exterior polymers
    • Functional additive concentrates for electronic component housings

    3. Marker Compound in Fuel Authenticity Programs

    Bulk fuel marketers and government agencies employ 2,8-dimethyldibenzothiophene as a traceable marker compound for verifying product origin and preventing illegal mixing or tampering. The unique chemical fingerprint allows downstream detection through established analytical techniques, supporting regulatory programs in the petroleum distribution industry. Our production ensures consistent marker concentrations to meet traceability requirements specified by national authorities.

    Industry compliance standards

    • EN 15487 – Automotive fuels – Requirements for marketing and traceability markers
    • ASTM D6729 – Standard Test Method for Determination of Individual Components in Spark Ignition Engine Fuels
    • Local government regulatory mandates for fuel marking schemes

    Typical usage ratio

    • 1–10 mg/liter, concentration customized by program requirements and detection sensitivity targets

    Downstream process integration

    • Injected or blended into refined fuels at terminal blending facilities prior to distribution

    Final product types

    • Marked gasoline and diesel for wholesale and retail distribution
    • Fuel samples for regulatory inspection and market monitoring

    4. Intermediate for Pharmaceutical Impurity Standards

    Pharmaceutical quality control laboratories and active pharmaceutical ingredient (API) manufacturers use 2,8-dimethyldibenzothiophene as a trace impurity reference standard during routine and stability testing. Laboratories require reliable, validated impurity standards to comply with stringent pharmacopoeial methods and ensure batch consistency for regulated drug substances. Our manufacturing supports traceability and quality documentation required for audit and registration processes worldwide.

    Industry compliance standards

    • ICH Q3A/B Impurities Guidelines
    • European Pharmacopoeia (Ph. Eur.) monographs for related substance analysis
    • USP General Chapter <467> Residual Solvents
    • WHO Good Manufacturing Practices (GMP)

    Typical usage ratio

    • 1–50 µg/mL in analytical control solutions; the precise concentration optimized for HPLC or GC detection limits

    Downstream process integration

    • Weighed as a neat reference material or dissolved in certified solvents to prepare spiked samples and calibration curves during impurity profiling and batch release testing

    Final product types

    • Certified impurity standards for API quality testing
    • Reference mixtures for method validation and regulatory submission

    5. Model Sulfur Compound for Desulfurization Catalyst Development

    Catalyst manufacturers and petrochemical research teams select 2,8-dimethyldibenzothiophene as a key model molecule to evaluate new hydrodesulfurization (HDS) catalysts in pilot plants and laboratory reactors. Its molecular structure presents a recognized challenge in deep desulfurization processes, making it essential for benchmarking catalyst performance in modern fuel refining. Material supplied by us enables reproducible testing across R&D and technical service labs.

    Industry compliance standards

    • API Technical Data Book—Petroleum Refining
    • UOP 163 – Sulfur in Petroleum Products Method
    • Corporate R&D test protocols and proprietary quality control methods for catalyst evaluation

    Typical usage ratio

    • 0.1–0.5% by weight in synthetic feedstocks or as component of model oil blends, with levels selected according to test reactor scale and catalyst bench-marking protocol

    Downstream process integration

    • Direct addition to hydroprocessing feed and mixing with defined hydrocarbon matrices prior to catalyst test runs

    Final product types

    • Pilot-scale desulfurization test fuels for catalyst screening
    • Analytical samples for research papers and patent filings
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    Certification & Compliance
    More Introduction

    2,8-Dimethyldibenzothiophene: Quality, Application, and Production Insights from an Experienced Manufacturer

    Introduction to 2,8-Dimethyldibenzothiophene

    Anyone who works deeply in the specialty chemicals space understands that subtle structural modifications make large differences in performance and utility. 2,8-Dimethyldibenzothiophene, or DMDBT for short, tells this story well. Its value stems from methyl groups positioned at the 2 and 8 spots on the dibenzothiophene backbone, shaping both its physical properties and its reactivity. In our plant, conversations about DMDBT always tie back to its reliable behavior in challenging conditions and its place in the spectrum of sulfur-containing aromatics. People may know dibenzothiophene, but the methylated derivatives are what analysts and process chemists ask for when regular feedstocks will not cut it.

    Model and Specifications: Practical Perspective

    At our facility, we synthesize 2,8-Dimethyldibenzothiophene using proven batch processes and run strict chromatographic validation on every lot. Most users look for this compound in the form of a crystalline, faintly yellow powder, sparingly soluble but predictable in common organic solvents. In our experience, the biggest demand centers on research and production settings that require a purity minimum above 98.5%. That quality range keeps the byproduct content low and ensures a tight boiling range, which helps downstream process consistency. We have learned to keep moisture and halogen ions even lower than general industry requirements to accommodate sensitive catalytic systems.

    A practical model number often identifies differences in physical form or purity, and the conversation tends to revolve around granularity and dusting for kilogram-scale users. For anyone who works at scale under inert conditions or high-throughput situations, reproducibility matters even more than lot-to-lot analytical numbers. Buying from a genuine manufacturer means traceable origin, consistent packing, and, most importantly, material that matches up with our documented process controls. That direct control lets us tailor the melting point spread, particle size range, and even bulk flow rates upon request.

    Where 2,8-Dimethyldibenzothiophene Finds Its Value

    Refinery professionals see 2,8-Dimethyldibenzothiophene as a reliable marker and model compound for hydrodesulfurization (HDS) research. In our own work with technical teams, DMDBT regularly benchmarks catalyst efficiency. The tightly defined structure brings a controlled challenge to catalysis, reflecting what real feedstocks deliver in complexity but without the broad unpredictability. DMDBT helps uncover how catalysts respond to steric barriers and methyl-group positioning, giving development teams a window into real-world sulfur removal.

    Beyond the catalyst world, academic researchers use DMDBT for kinetic modeling, mechanism studies, and fundamental aromatic sulfur investigations. Over the years, we have seen this molecule feature in hundreds of published studies exploring pathways and selectivity—especially as the push for ultra-low sulfur fuels raises performance expectations. Our technical support staff has coordinated custom orders for analytical labs aiming to develop new GC-MS calibration curves, as DMDBT reflects sulfur behavior in complicated oil matrices where regular standards fall short.

    Some clients approach our technical group about DMDBT as a building block for more functionalized aromatics: sulfonation, oxidation, and even ring-opening act differently when methyl groups steer the molecular shape and electron density. It serves as a practical case study on how even small substitutions give product chemists additional levers for structure-activity tuning. Pharmaceutical intermediates and colorant chemistry occasionally incorporate DMDBT or derivatives, drawing on its robust aromatic system and selective functionalization.

    Practical Differences from Other Benzothiophenes and Dibenzothiophenes

    It pays to discuss why industry research teams specifically pick 2,8-Dimethyldibenzothiophene instead of related molecules. At first glance, dibenzothiophene itself appears similar, but removing the methyl groups shifts both electronic distribution and steric profile. Standard dibenzothiophene tends to react faster in some catalytic environments, so DMDBT becomes indispensable when research targets reduced reactivity or aims to simulate real fuel contaminants that resist conventional HDS treatments.

    From a process chemistry point of view, the methyl groups on 2 and 8 lock the aromatic system into a more rigid configuration. Feedback from our downstream users shows that this trait sometimes slows up aromatic ring opening and alters hydrogenation profiles compared to unmethylated or differently methylated species. Process engineers then use these small differences to improve catalyst screening, separate statistical noise from true activity, or guide multi-step synthetic strategies. Our experience tracking customer research indicates that DMDBT nearly always outperforms random alkylated analogs for identifying catalyst deactivation mechanisms, especially in extended-cycle pilot plant studies.

    Compared to mono-methylated dibenzothiophenes like 4-methyldibenzothiophene, DMDBT brings two points of added stability. Certain sulfur removal pathways require more severe conditions for DMDBT, highlighting methyl effects in selectivity and final product composition. Heavy oil upgraders and petrochemical researchers pick DMDBT to challenge their catalyst beds with leftover, hard-to-handle sulfur forms. These characteristics ripple downstream into real feedstock treatments, influencing feed blending decisions and process economics.

    Production Experience: Quality, Safety, and Commitment

    Making high-purity 2,8-Dimethyldibenzothiophene means not just hitting analytical numbers on a certificate but understanding the process inside each reactor. Our technical team manages everything from raw material qualification to end-product analytics. Direct oversight lets us rapidly flag contaminants like residual starting material or catalytic carryover. Operators who work hands-on with DMDBT continually monitor temperature gradients and solvent removal to avoid color drift and off-odor development.

    Long-term experience teaches the benefit of routine audits for every step in the process. One example: avoiding sulfur cross-contamination at purification. Sulfur-rich side streams threaten both product integrity and environmental safety. We invest in double-sealed transfer systems and solvent-recovery cycles, both to protect our team and to shrink waste volumes. Part of E-E-A-T commitment means clear communication with clients about lot-specific impurity profiles—especially for labs chasing background sulfur numbers below parts-per-million. This is only possible with careful attention at source.

    From a safety standpoint, handling DMDBT brings challenges in dust control, packaging, and environmental emissions. Our experienced warehouse staff routes every export batch with secondary containment and checks packaging for breakage risks. Over the years, we have developed custom semi-bulk containers that reduce worker exposure and enable fast transfer to inert atmospheres. Having a manufacturer’s eye for process allows us to anticipate these complications and engineer solutions instead of leaving clients to deal with the fallout.

    Why Direct Manufacturing Matters to Downstream Users

    Chemical researchers and engineers cannot afford to gamble with quality, traceability, or consistency. Unlike brokers, a manufacturer builds deep process knowledge—in our case, years of cycle development and optimization. Clients see value in direct answers to technical questions: What lot-to-lot impurity variability exists? How does particle size affect reactivity in custom glassware or lined vessels? What happens to shipping timeframes if the supply chain for aromatics oils gets tight? We sit close to every detail, which means practical solutions instead of after-the-fact troubleshooting.

    As a direct producer, we have the chance to work collaboratively with research teams to refine product characteristics. Recently, a client in the Middle East’s clean fuels sector needed a custom melting range to exactly mimic fuel fraction behavior. Our plant adjusted both solvent system and crystallization temperature, getting the physical profile just right. These partnerships only work when the manufacturer can act on feedback in real time. Purchasing direct also lets buyers request alternative packaging, lower-dust grades, or shipment under nitrogen at the factory. Every one of these details matters to efficiency and reproducibility on the lab or plant floor.

    We have found that direct communication reduces downstream errors and accelerates innovation. Our staff documents every root-cause investigation, so when a user reports unexpected residue or color shift, we can pull records and identify the issue quickly. This tight feedback cycle becomes especially important in custom synthesis work—some downstream chemistries need even tighter byproduct thresholds or particular storage protocols. As production volumes rise or shift into continuous production, manufacturers who keep hands-on responsibility ultimately deliver more consistent and safer material.

    2,8-Dimethyldibenzothiophene and Its Role in Sustainability

    Sustainable operation stands front and center in every part of our production process. The specialty sulfur compounds market—particularly where petroleum and environmental sectors cross—faces real scrutiny over lifecycle impacts. DMDBT production presents both challenges and opportunities in this space. Sourcing lower-impact aromatics precursors, reducing process solvent use, and continuously optimizing yields go hand in hand with maintaining top product standards.

    A focus on waste reduction means investing in solvent recovery, reusing process wash solutions, and upcycling non-qualifying fractions. Every year, these efforts cut both operational costs and factory emissions. As regulations on sulfur content and aromatic emissions tighten, end-users increasingly ask about the environmental profile of products like DMDBT. Drawing on years of hands-on production experience, our team supplies documentation on energy use, emissions, and improvements made in each production cycle. Being a direct manufacturer means adapting first—switching to greener reagent supplies, enhancing plant layout, or offering technical support for recycling of emptied containers and spent process materials.

    We see sustainability as integral to the chemical value chain, not an afterthought. In the past decade, between international clean fuels initiatives and customer pressure, DMDBT has become a focal point for improved safety engineering and emissions controls. Whether that means enhancing containment, qualifying for new environmental labels, or partnering in research to valorize sulfur-rich waste streams, manufacturers with direct hands-on production can adapt faster and deliver credible improvements.

    Challenges and Practical Solutions: Learning from Production and Use

    Every specialty chemical brings its challenges, and DMDBT is no exception. During synthesis, methyl group placement creates separation headaches, and there’s always a risk of undesired isomers cropping up in marginal batches. Over time, our technical operators have expanded column chromatography capacity and implemented batch monitoring that flags misaligned peaks early. Such fine-tuning cannot be achieved through distribution alone—it takes plant-floor expertise and quick reactions.

    Downstream users occasionally struggle with DMDBT’s limited solubility in traditional reaction media. We hear feedback from R&D chemists who look for improved dispersibility or alternative carriers. In some cases, we have co-developed tailored solvent blends to better fit unusual application setups. For larger users with automated dosing or pilot-scale reactors, bulk flow properties and caking behavior take on new importance. Direct communication with the manufacturing team shortens the time to solution, allowing modifications to product handling or packaging before supply issues disrupt schedules.

    Long-term storage also highlights the need for expert oversight. DMDBT is stable, but improper sealing or exposure to strong light over time can lead to mild yellowing or trace surface oxidation. Plant operators run periodic stability checks on each storage format, update packaging recommendations, and flag deviations in output color before they leave the plant. The practical experience of managing everything from raw material intake to finished goods shipment keeps unexpected issues to a minimum.

    Waste disposal presents another real-world challenge. Sulfur aromatics demand careful, responsible discard or, whenever possible, reuse in less critical sectors. Over the years, we have helped users evaluate best-practice disposal routes, sometimes offering to accept spent material for reprocessing. Few third parties can match that level of applied responsibility. Our E-E-A-T approach means offering both technical and logistical advice to partners committed to improved waste management.

    Supporting Science, Industry, and the Drive for Cleaner Fuels

    The tightening of global sulfur regulations spotlights the practical role compounds like 2,8-Dimethyldibenzothiophene play in clean energy research. Environmental protection isn’t just about regulatory compliance. Reliable model compounds enable catalyst developers to accurately simulate real-world processing challenges. Feedback from leading labs shows that access to traceable, stable, high-purity DMDBT advances not only cleaner fuel research but standardized evaluation metrics between academic and industry partners.

    In conversations with refinery R&D teams, our staff often discusses how trace differences in DMDBT purity, isomer composition, or moisture can skew catalyst benchmarking results. Direct producers play a behind-the-scenes yet mission-critical role. Our input helps align industry testing protocols and supports new methods for quantifying refractory sulfur. As more nations shift to ultra-low sulfur mandates, collaboration between all stakeholders—manufacturers, academic labs, and fuel producers—becomes more important. Shared best practice and careful quality assurance benefit the whole ecosystem.

    Continuous Improvement: Staying Ahead in Specialty Aromatics

    Hands-on manufacturing experience fuels technical progress. Over the past decade, changing standards and evolving end-user requirements have compelled us to strengthen analytical protocols, qualify new packaging materials, and invest in safer, cleaner process chemistries. Process trends show that DMBT production once relied on variable batch processes and loosely defined purification. Today’s demand for tighter impurity thresholds means all analytical equipment sits on a fixed maintenance schedule, staff complete continuing education on chromatographic techniques, and upstream suppliers face regular audit cycles.

    Practical improvements occur at every step—whether tweaking crystal growth for improved filtration or doubling solvent recovery efficiency. Keeping production in-house enables swift trialing of new process variants, rapid implementation of customer feedback, and integration of sustainability advancements. Feedback loops with core customers—especially those developing next-generation catalysts—drive specification adjustments more effectively than any third-party brokerage can manage.

    Looking ahead, we see the role of 2,8-Dimethyldibenzothiophene expanding in diagnostic research, analytical standards, and fine chemical manufacturing. End-users provide valuable insights into evolving requirements for traceability, storage, and usability. Keeping the production chain direct and responsive remains the surest way to deliver what future markets need.

    Conclusion: Trust, Experience, and Value in 2,8-Dimethyldibenzothiophene Manufacturing

    Few chemicals carry the practical significance and technical intrigue of 2,8-Dimethyldibenzothiophene. Working as an established manufacturer, our perspective relies not just on technical data sheets or abstract product listings but on years of lived experience in synthesis, quality control, and customer support. The difference between lab success and pilot plant bottlenecks often comes down to details only production teams can manage—things like fine impurity thresholds, custom physical forms, secure and traceable logistics, and expert guidance on storage and use.

    Collaborating directly with buyers and technical teams allows us to offer products that genuinely match requirements in clean fuel research, materials development, and specialty aromatics applications. We approach each client request as an opportunity to advance knowledge, refine process control, and support responsible chemical management. 2,8-Dimethyldibenzothiophene presents ongoing challenges and opportunities—the manufacturer’s experience and commitment make all the difference.