Tengfei Creation Center,55 Jiangjun Avenue, Jiangning District,Nanjing admin@sinochem-nanjing.com 3389378665@qq.com
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Benzoquinone

    • Product Name Benzoquinone
    • Einecs 205-512-4
    • 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

    787439

    IUPAC_name Cyclohexa-2,5-diene-1,4-dione
    Common_name Benzoquinone
    Molecular_formula C6H4O2
    Molar_mass 108.09 g/mol
    Appearance Yellow crystalline solid
    Melting_point 115-116 °C
    Boiling_point 108 °C (sublimes)
    Density 1.318 g/cm³
    Solubility_in_water 6 g/L (at 25 °C)
    Odor Acrid, unpleasant odor

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

    Packing & Storage
    Packing Benzoquinone is packaged in a 500g amber glass bottle with a screw cap, labeled with hazard warnings and chemical identification.
    Shipping Benzoquinone should be shipped in tightly sealed containers, away from heat, sparks, and open flames, as it is flammable and potentially hazardous. It must be properly labeled and accompanied by appropriate safety documentation, in compliance with regulations. Ensure secondary containment and inert packaging to prevent leaks or exposure during transport.
    Storage Benzoquinone should be stored in a tightly closed container, in a cool, dry, and well-ventilated area, away from direct sunlight and incompatible substances such as strong oxidizers and reducing agents. It should be kept away from heat and ignition sources. Store benzoquinone in a designated cabinet for hazardous chemicals, clearly labeled, and ensure it is protected from moisture.
    Application of Benzoquinone

    Applications of Benzoquinone in Industrial Manufacturing

    Benzoquinone serves as a critical chemical intermediate across several advanced manufacturing sectors. As the original producer, we supply consistent high-purity product suited to demanding downstream processes. Each industrial application detailed below reflects authentic compliance, technical, and process requirements faced by our B2B customers globally.

    1. Agrochemical Synthesis: Herbicide and Fungicide Intermediates

    Major agrochemical producers incorporate benzoquinone in the synthesis of specific herbicide and fungicide active ingredients, such as paraquat and certain dithiocarbamate fungicides. These applications require high assay material for conversion reactions, including selective oxidation steps and coupling with amines or thiol compounds. Strict impurity thresholds and documented batch traceability remain essential to meet regulatory demands for pesticide manufacturing and export. Our supply supports continuous production cycles in active ingredient plants.

    Industry compliance standards

    • Regulation (EC) No 1107/2009 (EU Plant Protection)
    • US EPA 40 CFR Part 180 (Tolerance Exemptions)
    • REACH Annex VII quality documentation
    • ISO 9001:2015 for batch quality assurance

    Typical usage ratio

    • 12–30% w/w in oxidation step reaction charges
    • Adjustable based on molecular stoichiometry for final active loading

    Downstream process integration

    • Fed directly into step-growth reactors during active ingredient synthesis
    • Acts as both a reagent and oxidative mediator in intermediate stages

    Final product types

    • Paraquat dichloride tech grade
    • Mancozeb and other dithiocarbamate fungicide formulations
    • Specialty herbicides for regulated markets

    2. Polymerization Inhibitor for Unsaturated Polyester Resins

    Resin manufacturing utilizes benzoquinone as a short-stopped polymerization inhibitor, preventing premature gelation during storage, blending, and transportation of styrene-based and acrylate-based intermediates. Stability during shipment remains vital to downstream processors formulating building composites. Dosing must meet tight specifications to comply with resin user performance testing and maleic anhydride conversion control, especially for export to regulated construction segments and automotive parts suppliers.

    Industry compliance standards

    • EN ISO 9001:2015 for resin additive traceability
    • ASTM D3418 (Differential Scanning Calorimetry, inhibitor verification)
    • California Air Resources Board (CARB) limits for VOCs
    • Consignment-by-batch documentation per EU Construction Products Regulation (CPR 305/2011)

    Typical usage ratio

    • 5–20 ppm relative to overall monomer weight
    • Adjusted based on resin shelf life requirement and ambient transport conditions

    Downstream process integration

    • Dosed following monomer blending, prior to polymerization step
    • Monitored by in-line peroxide and inhibitor analysis

    Final product types

    • Unsaturated polyester resin bulk supply
    • Vinyl ester and styrenic resin drums
    • Composite building panel and sheet molding compounds (SMC)

    3. Pharmaceutical Intermediate for Antimalarial APIs

    Pharmaceutical manufacturers utilize benzoquinone in select synthetic routes for antimalarial API production, notably chloroquine phosphate and hydroxychloroquine. The quinone moiety participates in controlled oxidation and ring functionalization reactions, demanding high-purity, GMP-grade input. Trace metallic and organic impurities must remain below pharmacopeial thresholds. Process documentation and supply chain audit trails require maintenance throughout API and final medicinal product registration steps across regulated markets.

    Industry compliance standards

    • cGMP (ICH Q7) for advanced intermediates
    • Ph. Eur., USP standards for API intermediate purity
    • EDQM and WHO prequalification batch audit
    • FDA DMF submission for medical product APIs

    Typical usage ratio

    • 18–27% molar equivalent of precursor mass
    • Ratio varies with target pharmaceutical reaction yield

    Downstream process integration

    • Charged during controlled stagewise oxidation steps for API intermediate formation
    • Subject to in-process controls on residual benzoquinone/impurity carryover

    Final product types

    • Chloroquine phosphate API
    • Hydroxychloroquine sulfate finished API
    • Other 4-aminoquinoline derivative pharmaceuticals

    4. Dye and Pigment Manufacturing: Organic Colorant Synthesis

    The pigment and colorant industry applies benzoquinone in manufacturing anthraquinone, indigo, and other synthetic organic dyes. It operates as an oxidizing agent or as a structural unit in colorant molecule construction, with tight quality requirements for impurity profile and hue consistency. Major dye plants working with textile, inkjet, and plastic masterbatch end users rely on verified batch purity and residue content control. End-use sector regulations drive the necessary levels of documentation for toxicology and migration testing.

    Industry compliance standards

    • REACH Annex XVII (Azo restrictions, aromatic amine content)
    • ISO 9001:2015 and ISO 14001:2016 site certification
    • Oeko-Tex Standard 100 (textile dye safety)
    • EN 71-3 safety (toys and pigment applications)

    Typical usage ratio

    • 10–40% relative to total pigment precursor charge
    • Adjusted by final dye route and color hue requirements

    Downstream process integration

    • Added during oxidation and coupling stages in dye synthesis
    • Batch-controlled to ensure consistent color development and purity

    Final product types

    • Anthraquinone-based dyes for textiles and plastics
    • Indigo crude and refined grade for denim applications
    • High-performance pigments for coatings and inks

    5. Electronic Industry: Electrolyte and Battery Additive Manufacturing

    Producers of specialty electrolytes for non-aqueous batteries incorporate benzoquinone derivatives to enhance redox cycling and extend cell lifetimes. The material enters in strictly controlled low-concentration dosing to maintain charge transfer efficiency and limit side reaction formation. Manufacturing requires rigorous impurity screening and particle size control, conforming to major electronic industry standards for downstream battery performance and safety regulations in consumer electronics, power tools, and mobility sectors.

    Industry compliance standards

    • IEC 62619 (secondary lithium battery safety)
    • UN 38.3 (transport of battery cells and packs)
    • RoHS Directive 2011/65/EU for restricted materials
    • ISO/TS 16949 (automotive battery manufacturing)

    Typical usage ratio

    • 0.02–0.4% w/w relative to total electrolyte formulation
    • Tuned based on battery cell size and desired charge/discharge profile

    Downstream process integration

    • Added during electrolyte formulation under inert atmosphere conditions
    • Filtered to specified micrometer range before filling into cell assembly lines

    Final product types

    • Lithium-ion battery electrolytes for cylindrical, pouch, and prismatic cells
    • Specialty capacitors for high-reliability market
    • Secondary batteries for electronics, automotive, and stationary storage
    Free Quote

    Competitive Benzoquinone prices that fit your budget—flexible terms and customized quotes for every order.

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    Certification & Compliance
    More Introduction

    Benzoquinone: Direct From Our Production Line

    Practical Insights from Our Benzoquinone Manufacturing Floor

    Our team has spent decades mastering the synthesis of benzoquinone, walking through every step from raw material selection to the fine-tuning of process conditions. Behind every batch stands the labor of people who cut their teeth on chemical engineering, not only theorizing but actually putting real hands on reactors, testing samples, and using their sense of smell, sight, and intuition to know when the process delivers material worthy of our name. In the world of oxidizing agents, benzoquinone stays relevant for one simple reason: it works, and it works clean. From our reactors come crystals with a confidence that can only come from years of direct experience.

    Benzoquinone Model: Where Performance Starts

    We produce pure 1,4-benzoquinone, sometimes referred to as para-benzoquinone, which takes priority in several vital chemical reactions. Molecular formula C6H4O2 and a molecular weight of 108.09 g/mol line up with what researchers and industrial users expect. Our process ensures a purity of at least 99%, often higher on fresh runs, minimizing carry-over from precursor phenol or non-aromatic byproducts. Our benzoquinone crystallizes into short, yellow needles, with characteristic sharpness to the odor that tells any chemist they're dealing with the real thing. Melting point consistently lands around 115-116°C, so we've seen users melting and recrystallizing it with only the gentlest heating baths in the process lab. Our internal quality control standards flag any deviation in appearance, melting point, or reactivity before it gets anywhere near loading docks.

    From Reactor to Reaction: Why Our Practice Matters

    Benzoquinone isn't just sold; it's relied upon. In our production hall, we understand how chemists use it in the real world—beyond the textbook. Most clients are hydrotreaters, organic manufacturers, or R&D managers working in fine chemicals and polymers. They use benzoquinone in oxidation reactions, dye intermediates, pharmaceuticals, and polymerization catalysts. There's a constant demand in hydroquinone oxidation sequences and as a hydrogen acceptor due to its reliable electron-accepting properties. Alternatives like chloranil or anthraquinone sometimes get tested for similar processes, but few can compete with benzoquinone's overall versatility, especially in catalytic dehydrogenations or as a blitz oxidizer in redox systems.

    Getting the Right Product for Demanding Applications

    We hear stories from labs that make it clear—when impurities sneak in, reactions fail or, worse, need laborious rework. Our plant faces down the reality that clinical purity isn't a maybe but a must in several pharmaceutical syntheses. That’s why filtration, crystallization, and distillation all get attention as soon as a batch comes off the main reactor. In distillation columns, even pressure and temperature swings as minor as a degree or two can change what comes out the other end. Hands-on vigilance, trained eyes, and precise instrumentation stop those slight errors from ever reaching a customer’s bench. Whether the compound gets shipped to dye houses formulating indanthrene blues, pharmaceutical plants preparing antimalarials, or universities running core curriculum experiments, we respect that any corner cut can mean failed projects down the line.

    Working with Benzoquinone: Lessons from Feedback

    Feedback from technical managers reached us early and shaped our operations. A lab at a major pigment company once reported trace hydroquinone in their supplied benzoquinone causing color inconsistencies in their final dye batches. We doubled-down on our filtration and adjusted the final crystallization temperature zones as a result. Several pharmaceutical producers require certificates of analysis that track not just purity but specific contaminants, leading us to invest in new HPLC and GC-MS apparatus, not just for regulatory box-ticking but because experienced operators can spot outliers that plain numbers might miss. These moments remind us quality isn’t about chasing empty metrics—it’s about knowing what matters for reproducible, reliable reactions.

    Comparison to Other Oxidants: Hard Facts from Experience

    Customers on tight budgets sometimes ask about using other quinones or generic oxidants in place of high-purity 1,4-benzoquinone. We’ve seen clients experiment with chloranil (tetrachloro-1,4-benzoquinone) or even potassium ferricyanide for some oxidative coupling steps. While those agents have their place, experience says reactions often slow down, yields fall, or product isolation gets messy. Chloranil introduces chlorine—no small matter for pharmaceutical-grade syntheses, where regulatory and cleanup challenges multiply. Anthraquinone, another substitute, stays popular in pulp bleaching but underperforms in streamlined organic syntheses. Benzoquinone’s combination of strong oxidative potential and manageable downstream separation is what makes it so indispensable. Standard oxidizing agents like permanganate or chromium(VI) drop off the list quickly in modern labs due to hazardous waste and selectivity problems. Reliable benzoquinone makes the difference in projects that can’t afford setbacks.

    Handling and Storage: Solutions from Daily Operations

    From managing storage containers to opening a fresh drum for sampling, we know every step where benzoquinone can degrade or cause trouble if not treated with respect. It’s sensitive to heat, light, and above all, moisture. We store it in tightly sealed opaque drums and pails, in dry, well-ventilated stockrooms, because we’ve seen what happens when bulk supplies pick up water—lumps, color changes, off-odors, and worse, reactivity loss in downstream chemistry. Our plant crew cycles stocks with clear labeling and FIFO policy, never holding even well-sealed drums past their best-by timeline. Small-volume users, like universities, often request individually sealed bottles to ensure minimal air exposure after opening. By shipping promptly and matching container size to user consumption rates, we sidestep the need for anyone to compromise on reactivity due to age or storage missteps.

    Environmental and Safety Responsibility on the Shop Floor

    Manufacturing benzoquinone isn’t a “set and forget” business. Benzene derivatives present real hazards. We build our procedures around fume management, solvent recovery, and rigorous PPE compliance. People new to the plant get hands-on safety training before they even observe a reactor in operation. Through daily practice, we avoid spills, track emissions, and minimize plant waste headed offsite. Continuous monitoring of workplace air means everyone can breathe easy, both literally and figuratively. Green chemistry advances change how we run every year; we’ve adapted oxidation agents and solvents to reduce toxic byproducts further. We think about every drum in transit, too, not just as product, but as a responsibility. By investing in compliant packaging, buffered transport, and prompt recall response systems, we never lose sight of our role in the wider chain.

    Supporting Advanced Chemistry: How Benzoquinone Drives Progress

    From lectures to late-night process troubleshooting, benzoquinone has formed the backbone of innovations that end up in everyone’s life, whether in medicines, new materials, or specialty inks. We work with R&D departments striving to build more selective oxidations, faculty running organic synthesis classes, and developers looking for edge-case applications in enzymatic catalysis, flavor chemistry, or battery research. It’s a versatile material, but its clean reactivity gives experimenters leeway to adapt or push boundaries without side reactions holding them back. Each year, we field questions about obscure syntheses, requests for custom particle sizing, or needs for specific impurity profiles—requirements no off-the-shelf industrial chemical trader could grasp. We’ve delivered benzoquinone for redox flow batteries, copper-catalyzed cross-couplings, and even fine art restoration projects using its reducing/oxidizing properties in pigment recovery.

    Direct Manufacturing: Control from Initial Charge to Shipment

    Unlike intermediaries, our plant doesn’t just pass along barrels filled elsewhere. We control the process, starting from phenol oxidation, managing every pH adjustment, and monitoring reaction endpoints with both digital sensors and old-fashioned spot tests. Each batch moves through dissolving, extractive separation, and flash distillation before crystallization and final sieving. Only after passing visual and instrumental checks does it reach our packing zone. That routine means customers—whether buying ten kilos monthly or several hundred per campaign—rely on material without worrying about unknown hands diluting or mishandling it along the way. We’ve prepared custom runs for chromatography suppliers, developed bin batches for seed companies, and handled every shipment as an extension of our own shop—no product leaves without signature approval by someone who understands both its chemistry and its application.

    Day-to-Day Observations: What Sets Our Product Apart

    Purchasers who visit often comment on the difference between our product and that from generic sources. They notice consistency—how a crystal slurry stays bright yellow without the off-hues or needle size variation common in unregulated runs. Our QC staff spend time at the packaging line ensuring each drum holds the right mass, each sample vials up easily for quick melting point or chromatographic tests. More than once, a veteran process tech has opened a sample from another supplier only to find brownish streaks or faint green tint, both signs of incomplete oxidation or poor precursor quality. We believe in solving these issues at their root, not just apologizing after the fact. That approach allows us to stand behind our benzoquinone, batch after batch, year after year.

    Challenges and Continuous Improvement in Manufacturing

    Benzoquinone manufacturing is not risk-free, either technically or commercially. Fluctuations in phenol feedstock quality can change yield and impurity patterns overnight. Oxidation catalysts age, requiring constant vigilance. Our plant team regularly reviews output against historical trends, flagging outlier behavior for early intervention. R&D investments target both greener processes and automated controls that can reduce labor without sacrificing product safety or quality. We ask for and act on feedback, like adjusting drum sizes for a customer needing quicker turnover or switching to grease-free valves at user request. Our resolve comes from knowing that each change translates into more reliable chemistry for our clients.

    End Use Versatility: What Customers Achieve With Benzoquinone

    Put in the right hands, benzoquinone drives syntheses at every scale. Small R&D outfits turn out new molecule types using its redox power. Coatings producers achieve colors impossible without its oxidation potential. Pharmaceutical teams report streamlined steps in several APIs, sometimes eliminating whole purification sequences by choosing the right benzoquinone supply. Environmental labs even use it as a reference for developing degradation analysis of more stubborn pollutants. Some partners have developed continuous-flow systems where rapid, reproducible benzoquinone dosing is key to throughput—hence their trials often start in our QC lab, then scale up to kilogram runs with our technical consultation on dosing, feeding, and byproduct management. For food safety and flavor chemistry, benign downstream byproducts keep benzoquinone in the running over more aggressive oxidants. We’ve shipped to flavors houses running complex oxidative assays, and seen their panels confirm the absence of unwanted taints or off-notes.

    Lessons from Problem-Solving: Supporting Chemists and Engineers

    I’ve walked into partner labs that ran into snags—a stuck filtration after a benzoquinone oxidation run, or a persistent odor traced back to solvent grading, not the quinone itself. Sometimes it’s the material, sometimes the handling, but each lesson ends up back in our manufacturing notes. These real-world cases prompt improvements, from shifting to multi-step filtration to avoid insoluble fines, to conducting quarterly retraining on proper sampling and storage. More than one synthetic chemist has told us their breakthrough only came after switching away from subpar benzoquinone sources. That’s validation for every incremental improvement, every late-night adjustment to a process parameter that pays off in the next shipment’s reliability.

    Supporting Sustainability and Safer Chemistry

    Regulations keep tightening on what goes into the air, water, and worker environments—not just in our country but across every market we serve. Adopting lower-emission solvents and investing in scrubber upgrades, even when not strictly necessary, gives us a margin of safety and peace of mind. Tracking lot traceability from raw feedstock through final shipment ensures any issue can be traced and resolved rapidly. We see customers’ needs for fully documented, responsible chemistry as a core part of why they come direct to manufacturers, not brokers. It’s not just about the batch on hand but about a future that values both chemistry and community.

    In Summary: Real-World Benzoquinone Matters

    Every drum of benzoquinone that leaves our site reflects real work, from the plant operator to the analytical chemist. Behind the product, you’ll find people who stake their reputations, safety, and professional pride on output that makes a difference, whether for an industrial polymerization or a classroom demonstration. In choosing a true manufacturer, customers aren’t just getting a commodity but also decades of built experience translating raw chemistry into predictable results. We’ll keep listening, innovating, and delivering dependable benzoquinone so downstream users can focus fully on their breakthroughs—knowing that their starting material won’t hold them back.