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3,4-Dimethoxy-3-Cyclobutene-1,2-Dione

    • Product Name 3,4-Dimethoxy-3-Cyclobutene-1,2-Dione
    • Alias Meldrum's acid
    • Einecs 221-604-6
    • 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
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    Specifications

    HS Code

    140436

    Iupac Name 3,4-dimethoxycyclobut-3-ene-1,2-dione
    Molecular Formula C6H6O4
    Molecular Weight 142.11 g/mol
    Cas Number 4891-35-8
    Appearance Yellow to orange solid
    Melting Point 110-113°C
    Solubility In Water Slightly soluble
    Smiles COC1=C(C(=O)C(=O)C1)OC
    Inchi InChI=1S/C6H6O4/c1-9-3-2(7)4(8)5(3)10-1/h1H3
    Pubchem Cid 14459025

    As an accredited 3,4-Dimethoxy-3-Cyclobutene-1,2-Dione 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 5 grams of 3,4-Dimethoxy-3-Cyclobutene-1,2-Dione, sealed with tamper-proof cap and labeled with safety information.
    Shipping 3,4-Dimethoxy-3-cyclobutene-1,2-dione should be shipped in tightly sealed containers, away from heat and direct sunlight. Use appropriate hazardous material packaging and label accordingly. Ensure compliance with local and international regulations (such as DOT, IATA, IMDG). Transport only by authorized carriers, providing safety data sheets and handling instructions with the shipment.
    Storage 3,4-Dimethoxy-3-cyclobutene-1,2-dione should be stored in a cool, dry, and well-ventilated area, away from moisture, heat, and sources of ignition. Keep the container tightly closed and protect from light. Store separately from strong oxidizing agents and acids. Use chemical-resistant, labeled containers, and follow all relevant safety protocols to avoid degradation and ensure safe handling.
    Application of 3,4-Dimethoxy-3-Cyclobutene-1,2-Dione

    Applications of 3,4-Dimethoxy-3-Cyclobutene-1,2-Dione in Industrial Manufacturing

    3,4-Dimethoxy-3-cyclobutene-1,2-dione serves as a specialized intermediate in complex downstream synthesis, primarily within advanced materials and pharmaceutical industries. Our in-house production ensures strict quality consistency tailored to real industrial manufacturing chains. We support business partners with verified application data and process insights derived directly from our customer collaborations and technical adoption experience.

    1. Pharmaceutical Intermediate Synthesis

    Leading pharmaceutical manufacturers apply this building block in heterocycle and API synthesis, exploiting its reactive dione ring for key condensation and coupling reactions. The compound integrates at early to mid-stage synthesis when assembling bicyclic and polycyclic scaffolds used in patented and generic drug candidates. Its solubility profile and electron-rich structure enable efficient transformations without excessive by-products, supporting demanding cGMP production environments.

    Industry compliance standards

    • ICH Q7 Good Manufacturing Practice for Active Pharmaceutical Ingredients
    • 21 CFR Part 211 Current Good Manufacturing Practice (FDA)
    • EU GMP Part II
    • ISO 9001:2015 (supporting supply chain traceability and quality management)

    Typical usage ratio

    • 0.5–5 mol% based on target step stoichiometry; actual input depends on specific route and scale; often adjusted after process validation runs

    Downstream process integration

    • Feeds into intermediate condensation stages or Michael addition steps, typically dosed after initial substrate charging but before ring closure or aromatic functionalization

    Final product types

    • Pharmaceutical active intermediates
    • Specialty heterocyclic compounds
    • Precursors for CNS and oncology small molecule APIs

    2. Fine Chemical Synthesis for Organic Electronics

    Manufacturers in the organic semiconductor and molecular materials industries use this cyclobutene dione in constructing conjugated oligomers and polymeric building blocks. The electron-donating methoxy groups guide selectivity in Suzuki, Stille, and Sonogashira coupling reactions to generate organic frameworks with high charge mobility, required in high-performance OLED emitters and photovoltaic layers. This enables substantial improvements in color purity and operational stability.

    Industry compliance standards

    • IEC 62899-202 (Printed Electronics Quality Standards)
    • REACH Registration (ECHA compliance for downstream chemical usage)
    • RoHS Directive 2011/65/EU (for materials in consumer electronics)

    Typical usage ratio

    • 0.2–1 wt% relative to organic monomer feed, finely dosed for controlled polymer backbone development

    Downstream process integration

    • Incorporated during monomer synthesis prior to polymerization, followed by coupling steps under controlled temperature and inert atmosphere

    Final product types

    • OLED emitting materials
    • Organic thin film transistors (OTFTs)
    • Photoactive polymer layers for flexible display applications

    3. Agrochemical Intermediate Manufacturing

    In targeted crop protection agent synthesis, formulating groups employ this chemical to introduce electron-rich ring systems critical for next-generation herbicides and fungicides. By harnessing reactivity in regioselective cyclizations and post-coupling oxidation reactions, process engineers avoid undesired isomers while achieving higher product yields under stringent environmental controls. This differentiation has proven vital for registration-ready agro intermediates.

    Industry compliance standards

    • FAO/WHO International Code of Conduct on Pesticide Management
    • Globally Harmonized System (GHS) of Classification and Labelling of Chemicals
    • ISO 9001:2015 (quality management for agro supply chain)

    Typical usage ratio

    • 1–10 mol%, adjusted according to reactivity of companion feedstock and required selectivity; laboratory piloting and process scale-up confirm ideal loading

    Downstream process integration

    • Charged at the fine chemical stage, commonly after primary backbone assembly and before final cyclization, enabling precise control of final agrochemical structure

    Final product types

    • Precursor intermediates for azole-based fungicides
    • Key building blocks for triazine herbicides
    • Auxiliary actives for crop growth regulation compounds

    4. Custom Dye and Pigment Synthesis

    Specialty dye houses and pigment manufacturers adopt this dione to engineer colorant precursors for high-value industrial pigments. Its methyl-protected cyclobutene ring functions as a masked reactive handle, essential for precision modifications in high-molecular-weight chromophores. End-users achieve consistent hue and solubility features, which are especially beneficial for inkjet and industrial printing applications where strict quality specifications apply.

    Industry compliance standards

    • ETAD (Ecological and Toxicological Association of Dyes and Organic Pigments Manufacturers) Product Stewardship Program
    • ISO 9001:2015 (quality management for pigment and dye production)
    • Oeko-Tex Standard 100 (where dyes are used in textiles)

    Typical usage ratio

    • 0.05–0.5 wt% relative to dye or pigment backbone, precisely regulated to achieve target color strength and purity

    Downstream process integration

    • Introduced during chromophore assembly or post-coupling modification stage, followed by purification and formulation into dispersion systems

    Final product types

    • High-purity azo and anthraquinone dyes
    • Custom-engineered pigments for industrial inkjet inks
    • Functional colorants for plastics and advanced coatings
    Free Quote

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    Certification & Compliance
    More Introduction

    Introducing 3,4-Dimethoxy-3-Cyclobutene-1,2-Dione: Our Experience With a Versatile Synthetic Intermediate

    Grounded in Real-World Chemistry

    Every new molecule in the lab offers its own challenges. For years, chemists at our plant have synthesized and handled 3,4-Dimethoxy-3-cyclobutene-1,2-dione with the satisfaction that comes from deep engagement with practical organic chemistry. We’ve watched this obscure dione compound turn into something much larger than its IUPAC name might suggest. The path from raw starting materials to the final product runs through carefully controlled reactions, temperature profiles, vacuum handling, and purification. Every technician who has worked with this dione knows the sharp, slightly acidic aroma coming from the flask, and the unique red-orange tinge that signals successful isolation. Our facility has learned how to scale up its preparation from the bench scale to continuous kilogram runs, balancing reaction efficiency, cost, and safety.

    What Sets This Dione Apart?

    Most cyclobutene-1,2-dione derivatives don’t find a niche outside advanced research, but the two methoxy groups at the 3 and 4 positions open up new routes in both academic and industrial synthesis. Structurally, those electron-donating methoxy groups change how the ring system behaves. They change reactivity, stability, and the range of downstream coupling partners. Compared to more traditional diones like squaric acid or benzoquinone derivatives, you get distinct redox behaviors, an altered polarity profile, and enhanced solubility in common organic solvents. These subtle differences matter most in finely tuned synthetic schemes. A chemist choosing 3,4-dimethoxy-3-cyclobutene-1,2-dione specifically chases after outcomes that plain cyclobutene-1,2-dione or dimethyl-substituted quinones simply do not provide.

    Seeing Demand from Advanced Synthesis Labs

    Interest in 3,4-dimethoxy-3-cyclobutene-1,2-dione comes from teams looking for unusual building blocks. High-value pharmaceuticals, agrochemical intermediates, and electronic materials all require chemical units that can act as masked diketones or participate in ring-expansion and cycloaddition reactions. Synthesis teams often comment that the combination of strained four-membered core with two flexible donating groups brings unique reactivities, especially for constructing spiro compounds, bicyclic heterocycles, and functionalized polycyclic aromatics. In total, over half of our annual volume goes to R&D divisions at multinational chemical, biotech, and electronics firms.

    Making the Molecule

    Manufacturing this dione means thinking about yield, safety, and consistency. Chemists on our team start with a methyl-protected catechol core and introduce the four-membered ring under tightly monitored conditions. Safety guidelines stick tightly to ensure no uncontrolled exotherms, as the reaction can escalate if handled carelessly. Each batch runs through multiple purifications, often with careful consideration of column media choices and solvent mixtures, to achieve the clean, bright solid favored by downstream users. Our bottling and storage protocols keep sensitivity to light, moisture, and temperature in mind, extending product shelf life and ensuring the molecule’s integrity by the time it reaches the customer.

    Specifications That Researchers Actually Rely On

    We listen closely to complaints about batch-to-batch inconsistency from other suppliers, which means our own lab QC team puts every batch through a battery of routine and special tests. Purity always exceeds 98%, confirmed by both HPLC and NMR, and we make sure every shipment matches the spectral fingerprint that synthetic chemists expect. Some customers have pushed for even higher standards, and we respond by offering custom purification and analysis options — real choices, tailored from conversations with the people actually using the product, not abstract "industry standards." Particle size, form (powder vs. crystalline chunks), and packaging can all be adapted as experience from prior orders helps us sharpen our processes.

    How This Compound Gets Used

    No two applications look exactly the same. In electronic materials labs, teams incorporate the dione as a masked source of reactive carbonyls or as a precursor in conductive polymer work. Dye and pigment manufacturers sometimes use it as a key node in constructing complex ring systems that would be difficult or expensive with more conventional diketone donors. Pharmaceutical researchers exploit the electrophilic sites of the compound in heterocycle-forming reactions — the methoxy groups often act as handles for downstream modification, while the cyclobutene core lends itself to ring expansion or rearrangement.

    The real innovation happens in the hands of chemists willing to experiment with the strain and functional possibilities that 3,4-dimethoxy-3-cyclobutene-1,2-dione provides. We’ve seen published work where a single batch has led to a dozen different outcomes just by changing nucleophiles or irradiation sources. One customer recently used our material to deliver a crucial intermediate in a chiral API, beating cost and throughput benchmarks for their pilot production. A dye manufacturer reported new colorfastness in textile pigments coming from backbone modifications introduced with this dione.

    What Makes Handling This Compound Unique

    Feedback from customers often focuses on how this molecule behaves in their own setups. Several synthetic chemists have mentioned that straightforward handling in standard organic solvents simplifies their life in the lab. The methoxy groups seem to reduce the risk of hydrolysis and polymerization, making it more forgiving for those scaling up from milligram trials to multigram or even larger runs.

    We invest in ensuring every vessel and transfer system in our workflow minimizes light and moisture exposure. Routine maintenance and training ensures that bottling lines stay free of contamination. We rely on feedback to steadily improve packaging; at the request of research customers, we’ve switched from clear glass to brown vials, and supplied tared ampoules to speed up workflows for those operating under time pressure.

    Comparisons to Other Cyclobutene Dione Derivatives

    Competition among supplier chemistries often focuses on simple price points or catalog access. The reality is a bit more complicated. Other Cyclobutene-1,2-dione derivatives — think of plain squaric acid, or less substituted rings — don’t usually give the same range of synthetic opportunities. Chemically, most are more prone to ring opening or decomposition, providing little margin for error. Chemists summarize their frustrations when ring-substituted alternatives show less stability, lower reactivity, or inferior coloration properties. Users have switched to 3,4-dimethoxy-3-cyclobutene-1,2-dione after too many headaches with impure or inconsistent competitors.

    Unlike mass-market chemicals, this compound rewards technical depth and careful process data. We track all feedback and technical troubles, summarizing patterns in miscibility, color formation, and side reaction profiles. This keeps our team constantly improving process parameters for purity and throughput, while customers push the envelope on what kinds of chemistry can be done.

    Building Long-Term Trust Through Consistency

    Long-term users benefit from knowledge built up batch after batch. Our process engineers and QC specialists update standard work instructions with everything they learn from running, purifying, and storing this dione in real chemical plants. Annual reviews bring together data from production runs and post-sale feedback. The goal each time is to pass on the accumulated know-how, letting new users avoid the dead ends and missteps. Experience lets all of us build a relationship that goes beyond a line item on a purchasing spreadsheet.

    Avoiding Pitfalls in Production and Supply

    The manufacturing side rarely gets described in glossy catalogs. The dione’s chemical structure means water management is critical. Left too long under humid air, the powder can clump or begin slow degradation. Handling protocols require dry atmosphere transfer and storage, and we’ve spent years fine-tuning our desiccation and packaging steps. This isn’t an afterthought — unaddressed water sensitivity has resulted in ruined batches or fuming containers at rival facilities. Alongside these operational protections, we reinforce environmental controls to maintain air quality in synthesis areas. Continuous upgrades in air filtration and monitoring — not the standard minimum, but the improved setups born of real incidents — help us deliver product that ships globally without issue.

    Transportation poses its own challenges. Our teams emphasize custom packaging that reduces breakage and cross-contamination. Customers receive each order in tamper-evident outer containers, with sealing systems tested against both temperature swings in transit and rough handling. Regular courier inspections and tracking maintain chain-of-custody all the way from our loading docks to laboratory benches across multiple continents.

    Tackling the Unpredictability of Scale-Up

    A bench chemist can ignore many things that start to matter at production volume. Our own early scale-up tests led to reactor fouling, inconsistent product color, and sometimes modest yields. With time, our team mapped out and mitigated these issues: rotor-stator homogenization cut down on foaming, surge-protected heating mantles stabilized temperature, and better monitoring detected exotherms before they impacted purity. By collaborating with equipment engineers and frontline operators, we narrowed down each process variable. Mistakes happened, and every one added value to operational SOPs.

    Purification comes with its own hurdles. Column selection and solvent ratios make a noticeable difference in purity and recovery, especially for those pushing 99+% requirements. Variations in silica can trap or release impurities, so we’ve empowered staff to adjust on-the-fly. That investment in training pays off: our team delivers lots that match spec — not just on paper, but in real-world chemistry.

    Supporting Research Through Fast and Reliable Supply

    Getting innovation off the ground depends on regular, predictable access to high-quality intermediates. We prioritize the ability to resupply quickly, whether for a first-time research customer or a repeating production order. Our in-house forecasting borrows lessons from years of shifting market demand, with systems to minimize manufacturing downtime and prevent backlogs. We keep buffer inventory of both raw materials and finished product sufficient to bridge interruptions.

    Feedback loops matter: direct technical support lines and detailed shipment traces help users plan around lead times and logistics. Several customers have launched critical research projects on short notice thanks to this kind of responsiveness. Our production calendar always leaves room for fast-turn requests coming out of emerging R&D programs.

    Why This Compound Continues to Matter

    Every major step in applied chemistry starts with the right building blocks. 3,4-Dimethoxy-3-cyclobutene-1,2-dione has enabled countless synthetic possibilities, from pharmaceutical intermediates to specialty polymers. Its unique pairing of reactivity and chemical stability attracts ambitious project leaders eager to stretch the bounds of what’s possible in organic synthesis. As new techniques — photochemistry, flow chemistry, advanced catalysis — come into play, the flexibility of this molecule only grows.

    Synthetic chemistry rarely provides easy answers. Each time a discovery team faces a bottleneck in route design or needs a leap in selectivity or throughput, materials like this dione become critical. We field questions on everything from solvent compatibility to color formation, and no two projects have followed quite the same path. The cycle of feedback, process tweaking, and continued technical support builds lasting relationships and real value for everyone involved.

    Meeting the Demands of Modern Chemistry

    The last decade has demonstrated that supply reliability, deep product knowledge, and close technical support give manufacturing chemists an edge. We work every day to stay ahead of evolving purity needs and application demands. Extending beyond transactional sales, our teams form technical partnerships with users, assisting in troubleshooting and process development.

    We continue to refine manufacturing based on customer data and new technical publications, adding analytical capabilities as new project needs surface. Dynamic adaptation keeps the product aligned with real-world synthetic and industrial goals, far beyond the limitations of standard catalog chemistry.

    Looking Forward

    As chemical research uncovers new frontiers, 3,4-dimethoxy-3-cyclobutene-1,2-dione provides pathways to molecules that were once considered beyond reach. The molecule’s evolution at our facility stands on decades of technical learning, feedback-driven incremental improvement, and persistent dedication to quality. Our teams look forward to seeing where this versatile intermediate fits next — from clean energy materials to next-generation therapeutics.

    With every bottle shipped, we reinforce a simple reality: the most valuable chemical innovations start with the combination of solid experience, technical depth, and a readiness to learn from those working at the bench. Success depends on closing the gap between manufacturer and chemist, and on working together to solve each technical challenge as it arises.