Styrene

    • Product Name: Styrene
    • Chemical Name (IUPAC): Ethenylbenzene
    • CAS No.: 100-42-5
    • Chemical Formula: C8H8
    • Form/Physical State: Liquid
    • Factroy Site: No.1 Hengli Road Economic Development Zone of Nanma ShengzeTown,Wujiang District
    • Price Inquiry: sales3@ascent-petrochem.com
    • Manufacturer: Hengli Petrochemical Co., Ltd.
    • CONTACT NOW
    Specifications

    HS Code

    170981

    Chemicalname Styrene
    Casnumber 100-42-5
    Molecularformula C8H8
    Molecularweight 104.15 g/mol
    Appearance Colorless, oily liquid
    Odor Sweet, aromatic
    Boilingpoint 145°C (293°F)
    Meltingpoint -30.6°C (-23°F)
    Density 0.909 g/cm³ at 20°C
    Solubilityinwater 0.3 g/L at 20°C
    Flashpoint 31°C (88°F)
    Vaporpressure 6 mmHg at 20°C
    Refractiveindex 1.546 at 20°C
    Autoignitiontemperature 490°C (914°F)
    Explosivelimits 1.1% – 6.1% (in air, by volume)

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

    Application of Styrene

    Purity 99.9%: Styrene with purity 99.9% is used in the production of polystyrene plastics, where superior clarity and processability are achieved.

    Molecular Weight 104.15 g/mol: Styrene with molecular weight 104.15 g/mol is used in expandable polystyrene foams, where lightweight insulation properties are delivered.

    Refractive Index 1.546: Styrene with refractive index 1.546 is used in optical component manufacturing, where enhanced light transmission and clarity are required.

    Boiling Point 145°C: Styrene with a boiling point of 145°C is used in resin synthesis for composite materials, where improved thermal stability is provided.

    Stability Temperature 25°C: Styrene with stability temperature of 25°C is used in the storage and handling of polymer intermediates, where reduced risk of premature polymerization is ensured.

    Viscosity 0.69 cP at 20°C: Styrene with viscosity 0.69 cP at 20°C is used in coating formulations, where ease of blending and uniform film formation are obtained.

    Water Content < 0.05%: Styrene with water content less than 0.05% is used in emulsion polymerization processes, where minimized impurities lead to higher product purity.

    Inhibitor Content ≤ 15 ppm: Styrene with inhibitor content ≤ 15 ppm is used in latex manufacturing, where controlled polymerization and extended shelf life are achieved.

    Melting Point -30.6°C: Styrene with a melting point of -30.6°C is used in block copolymer applications, where uniform material flexibility at low temperatures is realized.

    Packing & Storage
    Packing Styrene is packaged in a 200-liter blue steel drum, sealed with a tight lid, and labeled with hazard warnings and handling instructions.
    Container Loading (20′ FCL) Container Loading (20′ FCL) for Styrene typically involves loading about 80 x 200L drums, totaling approximately 16 metric tons net weight.
    Shipping Styrene is shipped as a liquid in specially designed, tightly sealed steel drums, tank trucks, or tank cars due to its flammability and tendency to polymerize. Shipments are kept cool, away from sunlight, ignition sources, and inhibitors are added to prevent polymerization during transit. Proper hazardous material labeling and documentation are mandatory.
    Storage Styrene should be stored in a cool, well-ventilated area, away from direct sunlight, heat sources, and ignition sources. Containers must be tightly sealed, made from compatible materials like stainless steel or glass, and equipped with inhibitors to prevent polymerization. Styrene should be kept separate from oxidizing agents, acids, and halogens. Proper labeling and secondary containment are essential for safe chemical storage.
    Shelf Life Styrene typically has a shelf life of one year when stored in tightly sealed containers, away from light, heat, and inhibitors.
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    More Introduction

    Styrene: A Core Monomer Shaping Industries

    Understanding Styrene from a Producer’s View

    For decades, our teams have worked on every stage of styrene’s lifecycle, from purification in the reactors to quality control before tank transfer. On the shop floor, styrene’s pungent aroma and clear, watery appearance leave no doubt about its presence, and its volatility calls for a sharp focus on process engineering. This is a compound that never accepts shortcuts. Styrene leaves no room for sloppiness, whether in distillation columns, storage, or drum filling. Every part of our operation exists to keep it pure and safe, not just for our workforce but for our customers down the line.

    Styrene—C8H8—is not just a simple aromatic monomer. Industry views have shifted, but the core applications remain steadfast: polystyrene, ABS plastics, resins. On the factory floor, this monomer drives innovation and production scale at every level. Companies using our material need consistent outcomes, whether they're injection molding refrigerator linings, extruding packaging foam, or synthesizing engineered thermoplastics for automotive dashboards. Each demand on styrene brings fresh challenges to maintain clarity, low impurity, and reliable reactivity.

    What Makes Our Styrene Distinct

    Character matters for styrene—both at the molecular level and in how we handle it. We deliver the standard industrial grade, achieving a purity exceeding 99.7%, with inhibitors added by carefully calibrated dosing systems to avoid unwanted polymerization in transit and storage. That level of control does not come by accident; years of trial, process revision, investment in columns and safe storage, and the sweat of experienced chemical engineers writing protocols make it possible. We use in-process monitoring at every batch to maintain consistency lot after lot. Unmonitored variations can disrupt everything downstream, especially during mass polymerization.

    Other manufacturers sometimes lean on lower-purity grades or allow storage systems to age past their prime, which can introduce aldehyde or peroxide contamination. This results in hazy or yellowed polymer for their end-users, while our teams recall plenty of feedback sessions with OEM partners who expect clarity and resilience in everything from food containers to insulation foams. Quality assurance runs through every stage, not just at final dispatch. Even a fractional slip in purity could lead to entire production outages for a customer. Rather than react to a crisis, in our plants, quality control is tied to daily culture; teams work shoulder to shoulder with lab staff, reviewing gas chromatograph results and recalibrating process units, always seeking excellence that meets the hard standards of major multinationals.

    Realistic Applications, Backed by Daily Practice

    Polystyrene remains the flagship use of styrene, due to the polymer’s clarity, rigidity, and formability. We see demand spanning across single-use containers for food service, electronics housings, light diffusers, and even museum-grade picture frames. In large-scale polymer facilities, our customers count on predictable polymerization kinetics—meaning bulk polymer will always exhibit the same balance of elasticity and transparency. Our product keeps those lines running smoothly. Styrene-co-butadiene rubbers are a different animal, used for tire treads and floor tiles. These applications raise the bar for purity and require tight control over storage inhibitors, since rubber-makers expect processable, low-color, high-resilience output.

    ABS is a workhorse thermoplastic that leans on styrene for impact toughness and bright white finish. The market shift toward automotive interiors, motorcycle fairings, and durable consumer electronics brings sharp focus to class-leading physical properties. Consider the strict tests global carmakers enforce: heat resistance, scratch resistance, color stability through years of sunlight and cabin temperatures. Styrene’s composition feeds directly into how these attributes emerge once ABS resin is processed in injection machines. Practical experience shows: with subpar monomer, molded parts can warp, discolor, or fail impact tests. Factories don’t have time, or patience, to run lines twice. Most don’t realize a failed batch of toys or car fascia usually tracks back to the original monomer, not just filler or pigment.

    Styrene also pulls its weight in specialty unsaturated polyester resins, found in boat hulls, sanitary ware, wind turbine blades. We see growing demand for composite materials; builders and designers need lightweight yet solid structures, and resin with tightly controlled reactivity blends is where styrene shines. In mold shops, consistency determines surface finish and consolidation. Boat yards need repeatable processing, not blisters, pinholes, or poor bond lines. Our batch records go back years, even a decade, and our clients often study the results closely before launching large runs of composite assemblies.

    Handling Complexity: Practice Makes the Difference

    Anyone with a foot in day-to-day chemical production knows that handling styrene means more than just following templates. It involves an intricate dance of pipeline transfers, drum movements, venting procedures, and maintenance of inhibitor stocks. On humid days, we’ve witnessed tank sweats or vapor cloud advisories that call for immediacy and decision-making muscles honed through dozens of actual incidents. No instruction manual or online search matches the grounding from years responding directly to alarms and emergency drills when monomer isn’t flowing as expected.

    Our site operates with hot and cold tanks outfitted with nitrogen blanketing. Storage vessels are constantly monitored to prevent peroxide buildup or runaway exotherms. Not every supplier invests in this level of preventative safety, but for us, safety is non-negotiable. From maintenance folk spotting the first hint of pipeline seal aging, to the control room technician flagging data shifts on inhibitor dosing, our best days are the ones when every risk stays theoretical, not real.

    How Styrene Differs From Other Monomers

    Styrene gets compared to vinyl chloride, acrylonitrile, and methyl methacrylate—yet there are key differences that shape daily operations. Methyl methacrylate, for example, offers glass-like clarity and UV resistance but brings less flexibility and a distinctly different odor profile. Acrylonitrile has its strengths in impermeability and chemical resistance, yet brings acute toxicity concerns to the workspace, requiring respiratory protections beyond most styrene regulations.

    With styrene, reactivity is high, which pays off in fast polymerization when compared to bulkier comonomers. It keeps process times short and energy inputs relatively low, translating to lower long-term costs for users. But that speed also raises risk: runaway reactions, “popcorn” polymer, and related hazards demand discipline. Vinyl chloride users build infrastructure around carcinogenic vapor control, yet with styrene, the biggest challenge remains process safety under heat and pressure, not chronic toxicity.

    Styrene releases less hazardous vapor than some halogenated monomers, but it still irritates mucous membranes and can induce headaches or dizziness in operators who know the scent by heart. For working chemists and plant staff, familiarity does not breed contempt—it breeds respect. Failures in ventilation or PPE compliance do not forgive even seasoned hands. The solvent nature of styrene means architects must exclude anything that could corrode plant steel, soft-parts gaskets, or lining materials. Each tank cleaning and campaign switch is a full operation involving valve checks, site walk-downs, and at times, recovery of “heel” product for safe disposal.

    Shaping the Future: Market Evolution and New Demands

    Industry application for styrene today isn’t what it was twenty years ago. Sustainability pressures, microplastics regulations, and end-of-life recycling demand serious adaptation from suppliers and users alike. End-producers of EPS foam packaging face increased calls for biodegradability, which leads clients to request more transparent lifecycle data on our inputs—not just carbon footprint but also plans for product stewardship. That means every batch of styrene needs traceability clear back to the raw feedstock, with a chain of custody system robust enough to convince major multinationals and regulatory authorities around the world.

    Technical debates about the residual monomer level in finished plastics are no longer just about product performance—they are also environmental, social, and reputational. A decade ago, few end-users thought about trace regulatory solvent contamination. These days, multinational food companies, appliance makers, and retail brands request certificate trails and detailed process information for each drum or tank wagon shipped. This adds complexity, but from a manufacturer’s point of view, it also fosters accountability and trust.

    Styrene chemistry continues to evolve as new copolymers and blends reach development. Bio-based alternatives show promise, but still lag behind in both purity and cost performance metrics. Industry pushes for mass balance accreditation; this matters most for clients with global footprints seeking to cut their Scope 3 emissions. From our production office to the finished product, we’re constantly asked about how much renewable feedstock can shift into the process. These questions do not just come from procurement—they reach right up to boardrooms, investors, and public relations teams around the globe.

    Real-World Challenges for Styrene Production

    Each day in styrene manufacturing poses its own test. Reactor fouling, process bottlenecks, and inhibitor management have forced many overnight shifts in production schedules and overtime for staff. Old pipelines can generate oxidation that spoils a batch and brings losses—everyone in this business has seen plenty of hard-earned lessons from overlooked heat tracing or a weather-exposed valve left undone during a storm. There’s always the risk of batch off-spec, either from slightly contaminated feed, drift in catalyst performance, or a minute error in inhibitor concentration. Consistency is not buzzword compliance—it's lived reality. Production stops, maintenance checks, and off-spec resin are never cheap. Each slip during storage or transfer ripples across the supply chain, creating overtime for handlers, demurrage at terminals, and delays for downstream users operating to the minute on scheduled runs.

    From the producer’s perspective, handling returns and customer complaints brings another dimension. Sometimes a minor impurity that might not seem critical at first turns out to create real headaches weeks later for a client running a new process. By then, all eyes turn to the original certificate of analysis and batch record. Dedicated technical liaisons walk those clients through root cause investigations, because as manufacturers, we know our reputation hinges not on the easy days but the moments where problems surface and need real solutions.

    Seeking Solutions: Operational Upgrades and Industry Response

    Over the years, plant operations have continually evolved to meet stricter environmental and workplace safety benchmarks. Modern styrene production brings process automation, tight emissions controls, real-time monitoring, and frequent training refreshers for staff at all levels—from process engineers to truck drivers. Even so, process improvements never stop. Teams test new catalyst platforms, review reactor residence times, and back up every digital system with analog redundancy. Human vigilance matters as much as hardware. Our best shift supervisors spot a potential off-normal event by nose or noise, faster than any monitor.

    In response to tighter overseas restrictions, especially on airborne emissions and residual monomer in consumables, we’ve modified storage and shipment policies. Sealed vessels minimize oxidant ingress; refrigerated tanks keep product fresh and delay spontaneous polymerization. Regular pipeline “pigs” and strict tank cleaning regimens fight against stagnation and buildup. New controller logic can now spot subtle process drift before it impacts purity. All these steps cost time and capital, but they grow out of real demands made by clients who risk their own reputations every time a new batch gets processed into end-use parts.

    Perhaps the biggest margin for improvement today arrives through supply chain traceability and digital integration. Blockchain-backed batch records, live documentation, real-time incident reporting—these are not marketing gadgets; they support real-time analysis and accountability. Everyone, from end-users in medical device molding to clients producing airplane trays, expects exacting data trails. Confidence grows out of shared transparency, technical expertise, and readiness to resolve concerns face-to-face. For the chemical manufacturing sector, it’s not about avoiding scrutiny; it’s about leaning into high standards, open communication, and regular technical dialogue across teams.

    Choosing a Styrene Supplier: Questions that Matter

    No two styrene sources offer the same level of commitment to ongoing support and safety. Beyond price, industrial buyers investigate uptime records, preventive maintenance strategies, and disaster history. Regular supplier audits increasingly focus on workflow traceability, energy consumption, emissions, and operator safety drills. Our teams navigate these reviews without hesitation, prepared by years of internal QA, site inspections, and direct assessments from both regional authorities and global clients.

    Styrene’s importance in modern life is hard to overstate—from keeping food fresh and safe to allowing manufacturers to pack more performance into thinner, lighter, and more affordable goods. We live with the reality that our product shapes not just industrial outcomes but perceptions about plastics as a whole. Failing on reliability or product purity does not only hit us; it ripples out to every processor, converter, or assembly line depending on transparent, predictable, and consistent raw material.

    Stakeholders searching for the right styrene partner must weigh both the raw product and the depth of operational support, technical response, and commitment to ongoing improvement. Our dedication shows in the everyday actions of our crews, the follow-up calls from technical teams when something seems off, and the continuous investment in process and personnel training. Real manufacturers don’t just ship drums and railcars—they shape outcomes at every stage, from chemical design to customer satisfaction.

    Continued Evolution and Broad Industrial Impact

    Our production facilities, like most in the field, push forward with upgrades and R&D to meet tomorrow’s regulatory and customer demands. We see pressure for greater recyclability—and that trickles into joint projects with recycling tech developers and research labs focused on dissolvable or compostable polystyrene. Achieving these breakthroughs takes patient trials, raw feedstock changes, careful license discussions, and occasionally, hundreds of test runs to overcome small process incompatibilities.

    A product as foundational as styrene might seem straightforward on paper, yet after years in the industry, we know true difference arises not from the simplest specs but from relentless process rigor. From real-world safety walks finding a faulty seal days before it could become a hazard, to late-night conference calls translating customer feedback into actionable refinements, manufacturing is a people-driven science. In our business, what matters is not just what’s in the tank, but the confidence, knowledge, and skill brought to every step by those who make, move, and monitor the product every single day.