Products

Benzene

    • Product Name: Benzene
    • Chemical Name (IUPAC): Benzene
    • CAS No.: 71-43-2
    • Chemical Formula: C6H6
    • Form/Physical State: Liquid
    • Factroy Site: Yushan Island, Gaoting Town, Daishan County, Zhoushan City, Zhejiang Province
    • Price Inquiry: sales3@ascent-chem.com
    • Manufacturer: Zhejiang Petroleum & Chemical Co., Ltd.
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    Specifications

    HS Code

    179300

    Chemicalname Benzene
    Molecularformula C6H6
    Molecularweight 78.11 g/mol
    Casnumber 71-43-2
    Appearance Colorless, clear liquid
    Odor Aromatic, sweet odor
    Meltingpoint 5.5°C
    Boilingpoint 80.1°C
    Density 0.8765 g/cm³ at 20°C
    Solubilityinwater 0.18 g/100 mL at 25°C
    Vaporpressure 95 mmHg at 25°C
    Flashpoint -11°C (closed cup)
    Autoignitiontemperature 498°C
    Refractiveindex 1.5011 at 20°C
    Viscosity 0.604 cP at 25°C

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

    Packing & Storage
    Packing A 25-liter blue HDPE drum, tightly sealed, labeled "Benzene," with hazard symbols, handling instructions, and manufacturer’s details clearly displayed.
    Container Loading (20′ FCL) Benzene is typically loaded in 20′ FCL using steel drums or ISO tanks, ensuring strict leak-proof and hazardous material handling protocols.
    Shipping Benzene must be shipped as a hazardous material, complying with international and local regulations. It should be transported in tightly sealed, properly labeled containers, typically drums or tanks, designed for flammable liquids. Adequate ventilation, spill containment measures, and emergency response equipment are essential. Only trained personnel should handle shipping and documentation.
    Storage Benzene should be stored in tightly closed, clearly labeled containers, away from direct sunlight, heat sources, and ignition points due to its flammability. Storage areas must be well-ventilated, cool, and equipped with explosion-proof electrical fixtures. Keep benzene separated from oxidizing agents, acids, and incompatible chemicals. Use approved flammable liquid storage cabinets and ensure all safety regulations and spill containment measures are followed.
    Shelf Life Benzene has an indefinite shelf life when stored properly in tightly sealed containers, away from heat, sunlight, and ignition sources.
    Application of Benzene

    Purity 99.9%: Benzene with purity 99.9% is used in pharmaceutical synthesis, where it ensures high-yield and low-impurity active ingredient production.

    Boiling Point 80.1°C: Benzene with boiling point 80.1°C is used in chemical distillation processes, where it enables precise temperature control and solvent recovery efficiency.

    Aromatic Content 100%: Benzene with aromatic content 100% is used in polymer manufacturing, where it maximizes structural uniformity and polymer chain stability.

    Low Sulfur Content <0.001%: Benzene with low sulfur content <0.001% is used in lubricant additive formulations, where it minimizes corrosion and enhances product lifespan.

    Molecular Weight 78.11 g/mol: Benzene with molecular weight 78.11 g/mol is used in organic synthesis, where it supports predictable reaction stoichiometry and product standardization.

    Density 0.876 g/cm³: Benzene with density 0.876 g/cm³ is used in resin production, where it facilitates optimal mixing ratios and final product consistency.

    Stabilized Grade: Benzene stabilized grade is used in industrial coatings, where it reduces autoxidation risks and improves shelf-life performance.

    Water Content <0.05%: Benzene with water content <0.05% is used in agrochemical formulations, where it prevents hydrolysis and maintains chemical stability.

    Melting Point 5.5°C: Benzene with melting point 5.5°C is used in laboratory reagent preparation, where it allows reliable handling at controlled temperatures.

    Low Benzene Peroxide <0.001%: Benzene with low benzene peroxide <0.001% is used in semiconductor production, where it prevents unwanted side reactions and defects.

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    Certification & Compliance
    More Introduction

    Benzene: A Closer Look at Its Role, Quality, and Value for Industry

    Everyday Experience Behind Benzene Manufacturing

    Benzene stands out as one of the most essential aromatic hydrocarbons produced at industrial scale. From our hands-on experience running large-scale distillation and catalytic reforming units, I can say that getting benzene right goes far beyond simply hitting the right purity figure on a specification sheet. This product demands consistency batch after batch, robust supply, and a deep understanding of the changes that even trace-level impurities can introduce to downstream chemical processes.

    Our plants run continuous operations, converting petroleum feedstocks into benzene using proven extraction and refining technologies. Direct recovery from pyrolysis gasoline and catalytic reforming cuts places specific attention on the feed admixtures, water content, and trace organics that interact with zinc, iron, or copper catalysts in customers’ units downstream. Consistency in this context cannot be overstated. We routinely measure purity at or above 99.9%, but we focus even harder on controlling sulfur compounds and olefins, since small deviations, though undetectable in finished product aroma or appearance, can cause major disruptions during the synthesis of phenol, cyclohexanone, and linear alkylbenzene surfactants.

    What Benzene Means Across the Chemical Chain

    Benzene’s significance comes from its sheer versatility. Every day we dispatch railcars filled with benzene destined for customers serving the resin and plastics markets, the tire and rubber industry, the pharmaceutical sector, and even agrochemicals. It starts simple, yet its reach extends through hundreds of downstream reactions. The classic nitration pathway yields intermediates for dyes and drugs. Alkylation builds up to form ethylbenzene, leading directly to styrene for polymers. Hydrogenation takes benzene to cyclohexane, essential for nylon production.

    Many new customers focus on the numerical grade, like 99.9% or “industrial grade,” but real-world success arrives when the supplier understands which trace impurities will disrupt your batch yield, which tars might poison an expensive catalyst bed, or how a slight moisture pickup during the summer can translate to erratic color in final plastic parts. Our teams spend as much time tracking oxygenates, sulfur, calcium, iron, and even water content during transit as they do measuring bulk purity. No two end-users need exactly the same profile—which makes close partnerships crucial.

    Consistency: What Matters More Than Paper Specifications

    A benzene sample can pass all standard purity requirements and still cause trouble in a high-throughput chemical plant. Years operating our separation columns and post-production storage systems have shown us where surprises can come from. Storage tank linings, hoses, seals, and transfer pumps each present contamination risks, especially from metal ions or lubricants. Even minuscule levels of chlorinated organics or amines, if picked up during transit, serve as catalyst poisons in anionic or coordination polymerization units. Our technicians have learned to re-verify every truckload and railcar before final loading, not only with online sensors but with on-site chromatographic checks.

    Volume producers worry less about the minor price differences between suppliers. Attention focuses on the relationship with technical teams who can respond on short notice if something shifts—the color drifts, haze appears in a line sample, or an unfamiliar odor suggests contamination from like-but-not-identical aromatics such as toluene or xylene. We offer customers routine visits and collaborative investigations designed to isolate sources of off-specification events. This open-door approach builds trust and keeps the chemical network resilient.

    How Benzene Differs from Toluene, Xylene, and Other Aromatics

    People often group benzene, toluene, and xylene together as “aromatic hydrocarbons,” but in our experience the similarities end with their six-carbon ring. Benzene’s lower boiling point and “clean” aromatic backbone make it ideal for those running high-purity reactions or where subsequent functionalization relies on an undisturbed core. In contrast, toluene and xylene introduce methyl groups, increasing solvency and shifting boiling ranges, which can either benefit or complicate downstream reactions depending on the application.

    In the rubber industry, for example, our customers need low-residue benzene because contamination with toluene can inhibit polymerization kinetics. On the other hand, in coatings and printing, blending benzene with toluene or xylene enhances solvency and evaporation balance. This opt-in customization stems not just from our process control, but from direct technical dialogue with process engineers. Being the manufacturer lets us adapt tank sequencing, optimize fractional crystallization, and schedule shutdown cleaning when customer data signals a trend in off-spec shipments.

    There’s also the question of regulatory thresholds. Benzene faces much stricter limitations in pharmaceuticals and consumer products, especially in Europe and North America, compared to toluene or xylene. Our certification staff works alongside safety officers and auditors to keep up with changing limits, conducting proactive documentation and trace metal scans for every production batch destined for sensitive end markets.

    Specifying Benzene: Model and Production Approach

    From our production units, the main specification for benzene focuses on purity and the control of critical trace elements. We source reformate and pyrolysis gasoline through long-term integrated supply partnerships, then separate benzene using extractive distillation and azeotropic processes under tight temperature and pH control. Each “model” of benzene isn’t a brand—it’s a testament to the specific route, catalyst, and final polishing used in its manufacture. Engineers reading production logs look for attributes such as total aromatics content, bromine index, and sulfur numbers below 1 ppm.

    To meet multiple market needs, we operate two primary product streams. Our standard “industrial grade” supports plastics, resins, and lubrication applications, balancing throughput with cost. A higher-purity “polymer grade” results from extra percolation, filtration, and polishing—achieved through additional molecular sieve and activated carbon steps. This grade heads straight to phenol producers, fine chemical plants, and other sites where subsequent reactions leave no margin for error.

    Batch records carry not just purity, but also dates of last maintenance on all storage equipment, timestamped records on vacuum seal checks, and a full inventory of upstream feed origins. Our in-house quality teams study not only the incoming analytical certificates but watch for red flags in logistics, climate impacts, and rail shipment performance. Over the years, this diligence has shown clear benefits: less downtime for clients, and a sharp drop in rejected shipments.

    Usage: Real Cases and Endless Applications

    Our days involve as much troubleshooting as they do routine shipping. Benzene may leave our gates destined for synthesis of styrene in megaton quantities, but some shipments head to pharmaceutical standards labs, others to agrochemical precursor facilities, or university research centers testing new polymerization catalysts. Each application places its own unique expectation on the product.

    Plastic producers rely on steady purity and moisture control to keep polymerization reactions steady across weeks of full-plant production. In agrochemical synthesis, a bolus of benzene initiates routes leading to herbicides and pesticides. Accuracy in sulfur and nitrogen content ensures these reactions don’t stall or form unwanted byproducts. Researchers—perhaps the most demanding customers—often ask about isotopic comp, trace heavy metals, and even specific oxygenate profiles, as they push catalysis or reaction science forward.

    In these interactions we act as problem solvers, not just shippers. If a batch of tires begins failing quality checks, clients call us before tearing apart their reactor. Field engineers work shoulder-to-shoulder with their process teams to chase down the root cause, whether it’s changes in benzene humidity, possible polymerization toxins from tank cleaning, or deviations in inhibitor concentration. Every product transfer carries the knowledge and history of production, backstopped by a technical laboratory capable of same-day verification and restart protocols in case the unexpected occurs.

    Safety and Transparency: Beyond Compliance

    Benzene is a cornerstone of the chemical industry, but it comes with its share of regulatory scrutiny and safety challenges. Long experience has taught us there’s no cutting corners here. Our facilities follow the strictest occupational health and environmental controls, continually updating ventilation, leak detection, and fire suppression technology. Operators wear personal exposure monitors, and all storage areas undergo continuous air quality monitoring.

    On the documentation side, every batch shipped leaves a digital and paper trail. We regularly audit all MSDS information, update hazard labels to match transport region regulations, and maintain direct lines to local emergency responders. We collaborate with customers on-site, reviewing their own handling protocols and sharing the latest best practices for vapor containment, spill management, and emergency response.

    We also see ongoing conversations with city authorities, environmental groups, and logistics carriers as part of our job. Benzene’s reputation in the public mind has suffered from legacy stories of older, less-controlled installations. Today’s level of scrutiny means we share our air emissions, soil and groundwater monitoring data, and even regular third-party audits. These efforts have established a foundation of trust with neighbors, customers, and regulatory agencies.

    Problems and Lessons Learned: Adapting Production for Customer Needs

    Even with the most advanced equipment, problems can still arise. We’ve seen how temperature spikes in rail transport can cause benzene to pick up trace water, which then throws off moisture-sensitive syntheses. In these cases, we’ve invested in double-sealed tanks and silica-gel vent canisters, allowing us to deliver dry product even during humid summer stretches. Customers running low-emission or closed-loop systems need benzene with minimal volatile impurities—we adjust line purges, add final condensation steps, and routinely test for C6H6 derivatives before shipment.

    Some years back, we noticed a spike in complaints about inconsistent odor and solvent power for use in specialty coatings. After a series of joint investigations with our partners, we traced the source to variation in upstream reformate quality as a result of seasonal refinery feedstock switches. In response, we created an early-warning assessment protocol, flagging increases in minor aromatic isomers and pre-emptively blending to stabilize output. This experience pushed us to enhance data integration between raw material sourcing, terminal operations, and downstream analytics.

    During expansion projects, we’ve had to innovate space-saving storage and transfer solutions while maintaining vapor containment and easy emergency access. Close work with pump and valve manufacturers led us to new PTFE diaphragm pumps, now standard on all benzene loading racks, reducing cross-contamination and environmental exposure. It’s these hands-on solutions that matter most on the ground.

    Looking Forward: Adapting Benzene Manufacturing for Changing Demands

    Benzene markets continue to shift. Global moves toward green chemistry and stricter environmental legislation guide how we source, manufacture, and deliver this product. Responding to these trends, our research teams have spent the last several years testing bio-based benzene precursors and pilot-scale fermentative routes, searching for ways to maintain performance while cutting carbon intensity and fossil reliance.

    Recycling also plays a growing role. We process benzene-recoverable waste streams from downstream facilities, re-distilling and purifying to re-enter fresh product into the supply chain. This not only brings the environmental balance into sharper focus but also helps buffer market fluctuations in petrochemical feedstock costs and supply chain disruptions.

    New monitoring and automation technologies drive further improvements. Today, plant operators and quality managers receive live alerts from sensor networks embedded throughout our logistics chain, flagging temperature fluctuations, pressure drops, or possible contamination in real time. Investments in laboratory robotics and data science help us identify subtle patterns that indicate a need for new standard operating practices or preventive maintenance checks, keeping both product quality and safety levels at their peak.

    Value of Manufacturer Relationships in Benzene Supply

    Chemicals like benzene don’t flow through anonymous pipelines; they travel through complex webs of trust, situational knowledge, and hands-on expertise. As direct manufacturers, we’ve found that the best outcomes stem from deep, ongoing engagement with our users. Transparent communication shortens response time should anything go off spec, and technical discussions sharpen our ability to refine formulations for emerging requirements.

    From initial inquiry to railcar offloading, our field teams support customers facing shifting process needs, regulatory changes, or unforeseen technical hurdles. This in-the-trenches approach beats any templated solution or distant, one-off sales relationship. Our success as benzene manufacturers connects not just to the molecule’s importance, but to our willingness to adapt and invest in the solutions that our customers and communities demand.

    Benzene’s Place in Tomorrow’s Chemical Industry

    Every year brings another advance in materials science, eco-design, and process intensification. Benzene’s unique chemical structure and reactivity promise ongoing relevance, but only those manufacturers who stay responsive and diligent will continue to lead. Our experience has shown that small details—a trace impurity here, a late pump seal there, a humidity swing at a storage terminal—matter for plant efficiency, product safety, and customer confidence.

    From our vantage point, at the center of hands-on production and customer support, benzene becomes more than a commodity or a theoretical “feedstock.” It’s a daily challenge—a reminder that even the most fundamental industrial chemicals require open communication, scientific skill, and real accountability to deliver the consistent value the world depends on.