Styrene monomer is an aromatic vinyl compound with a boiling point of 145 °C at 101.3 kPa, a closed-cup flash point of 31 °C, and a relative vapour density of 3.6. Liquid density at 20 °C is 0.906 g/cm³; lower and upper explosion limits in air are 1.1 vol% and...
Styrene with an assay specification of 99.5% minimum by capillary gas chromatography is an aromatic vinyl monomer with CAS 100-42-5, molecular formula C8H8, molecular weight 104.15 g/mol, boiling point 145 °C at 101.3 kPa, and density 0.906 g/cm³ at 20 °C. The 99.5% purity grade is specified in polymer-grade styrene...
Styrene (CAS RN 100-42-5; C8H8) is received at polymerisation plants as a clear, water-white liquid with a density of 0.906 g/cm³ at 20 °C and a boiling point of 145 °C at 101.3 kPa. For polystyrene production, the monomer is unloaded into nitrogen-blanketed storage tanks maintained at 15–25 °C, with...
Styrene (CAS 100-42-5, vinylbenzene, phenylethylene) is an aromatic vinyl monomer produced commercially by direct catalytic dehydrogenation of ethylbenzene over a potassium-promoted iron oxide catalyst. Typical reactor trains operate at 600–650 °C with a steam-to-hydrocarbon molar ratio between 6:1 and 14:1, yielding single-pass ethylbenzene conversion of 60–70 % and styrene selectivity...
Polymer Grade Styrene Monomer (SM) Exporter: Technical Data & MSDS Polymer-grade styrene monomer (SM) is consigned internationally as a stabilized aromatic hydrocarbon with a purity specification of not less than 99.7 mass % on an inhibitor-free basis when tested by capillary gas chromatography per ASTM D5135-16. Export shipments are assigned...
Styrene Monomer (CAS 100-42-5) Supplier & Manufacturer Guide The Styrene Monomer (CAS 100-42-5) Supplier & Manufacturer Guide consolidates procurement, handling, and downstream process data for the aromatic vinyl monomer C8H8 with molar mass 104.15 g/mol, density 0.906 g/cm³ at 20 °C, normal boiling point 145.2 °C at 101.3 kPa, freezing...
Styrene monomer with a specified assay of 99.7% by mass is the reference commercial grade for large-volume polymerization and copolymerization operations. The specification and certificate-of-analysis framework examined here is Styrene Monomer 99.7% under ASTM D2827-20. The aromatic hydrocarbon, CAS 100-42-5, has a molecular weight of 104.15 g/mol, a normal boiling...
Styrene (CAS 100-42-5, C₈H₈, molecular weight 104.15 g/mol) is an aromatic vinyl monomer with a normal boiling point of 145°C at 101.3 kPa, a density of 0.906 g/cm³ at 20°C, and a closed-cup flash point of 31°C. The commercial distinction embedded in the specification phrase Styrene Grades: Polymerization Grade vs...
How to Read a Styrene COA: Purity, Polymer, TBC & Aldehydes Styrene monomer is classified as a reactive vinyl aromatic intermediate used in the production of polystyrene, acrylonitrile-butadiene-styrene resins, unsaturated polyester resins, and styrene-butadiene latex. Because the material can undergo radical polymerization during storage, the certificate of analysis is not...
Styrene, CAS 100-42-5, EC 202-851-5, is a vinyl aromatic monomer with molecular formula C8H8 and molar mass 104.15 g/mol. It is classified under HS Code 2902.40, and the trade-data pair HS Code 2902.40 & Styrene Import Duty by Country is the primary sorting key in cross-border sourcing analysis. At 20...
Styrene monomer (CAS 100-42-5; EC 202-851-5; CLP index number 601-026-00-0) is an aromatic vinyl monomer with molecular formula C8H8 and molar mass 104.15 g/mol. In European Union import operations, the controlling documentation set is defined by Regulation (EC) No 1907/2006 (REACH) and Commission Regulation (EU) 2020/878, commonly designated REACH Registration...
Styrene (CAS 100-42-5; C₈H₈; molar mass 104.15 g·mol⁻¹) is an aromatic vinyl monomer with a boiling point of 145 °C at 101.3 kPa, a flash point of 31 °C, and a vapour pressure of 0.67 kPa at 20 °C. The compound’s health and regulatory status is governed by interlocking frameworks:...
Styrene Quality Disputes: Polymer Content & TBC Depletion Styrene monomer quality disputes involving polymer content and 4-tert-butylcatechol (TBC) depletion rarely originate from a single root cause. They arise where storage history, dissolved oxygen, and thermal exposure intersect. In continuous polystyrene production, a retained sample showing polymer content of 18 mg/kg...
The TBC inhibitor in styrene: why 10–15 ppm matters is best understood through the autopolymerization chemistry of the monomer. In polymer-grade material, 4-tert-butylcatechol is deliberately held at 10–15 ppm (mg/kg) to prevent thermally initiated radical polymerisation during storage, transport, distillation, and reactor feed hold-up. Styrene monomer undergoes thermal self-initiation through...
Styrene for GPPS & HIPS: PS Plant Feedstock Guide Styrene monomer intended for general-purpose polystyrene (GPPS) and high-impact polystyrene (HIPS) polymerisation is specified by purity, 4-tert-butylcatechol (TBC) concentration, water content, and the concentration of chain-transfer-active aromatic impurities. In bulk continuous polymerisation, the monomer is preheated from storage at 15–20 °C...
Styrene for EPS: Expandable Polystyrene Production Styrene monomer intended for expandable polystyrene production is not a single-specification feedstock. The monomer is received with a polymerisation inhibitor, typically 4-tert-butylcatechol, at 10–15 ppm. This inhibitor stabilises the monomer during storage and transport, but it must be removed before suspension polymerisation. In a...
Styrene for ABS & SAN: Polymer Plant Sourcing Styrene monomer sourced for acrylonitrile-butadiene-styrene (ABS) and styrene-acrylonitrile (SAN) operations is controlled through ASTM D2827-20, supplemented by plant-specific limits for inhibitor, water, polymer, and carbonyl impurities. In bulk and suspension trains, the monomer has a dual function: it is both the copolymer...
Styrene functions as the primary reactive diluent in unsaturated polyester (UPR) formulations, typically present at 25–50 wt% of laminating and casting resins. The low-viscosity monomer dissolves low-molecular-weight unsaturated polyester chains by disrupting intermolecular chain entanglement and lowering solution viscosity to processable ranges: medium-reactivity orthophthalic UPR solutions frequently exhibit Brookfield apparent...
Styrene monomer for SBR, Nitrile Rubber & SBL Latex is supplied as a clear aromatic vinyl liquid with CAS 100-42-5, a molecular weight of 104.15 g/mol, a boiling point of 145 °C at 101.3 kPa, and a closed-cup flash point of 31 °C. Polymer-grade material is governed by ASTM D2827,...
Styrene monomer intended for the synthesis of SBS and SIS block copolymers for asphalt modification is specified at purity levels that exceed general-purpose styrene. Anionic polymerization with n-butyllithium in cyclohexane is sensitive to water, oxygen, aldehyde, and inhibitor residuals; consequently, monomer specifications aligned with ASTM D2827 are applied to feed...
Procurement records for styrene-based materials routinely conflate two separate chemical identities: styrene monomer, a reactive aromatic vinyl liquid classified under UN 2055 as a Class 3 flammable liquid, and general purpose polystyrene, a solid amorphous thermoplastic with a number-average molecular weight commonly between 100,000 g/mol and 300,000 g/mol. The phrase...
Styrene Monomer Sourcing: Route-Specific Data for EB Dehydrogenation and PO/SM Procurement Commercial styrene monomer (CAS 100-42-5) is produced predominantly by catalytic dehydrogenation of ethylbenzene or by co-production with propylene oxide via ethylbenzene hydroperoxide. The purchasing decision between these sources cannot be reduced to per-tonne cost because polymer-grade specifications under ASTM...
Styrene in FRP Workshops: Gel Coat & Lamination Monomer occupies two separate process chemistries in open-mould and closed-mould composite fabrication. In gel coat systems, styrene mass fraction is typically 30–45 wt%; in laminating resin systems, it is commonly 40–50 wt%. The monomer functions as both a reactive diluent and a...
Styrene for Specialty Copolymers & ASA/MS Polymers is supplied as a polymerisable aromatic monomer with CAS registry number 100-42-5, molecular weight 104.15 g/mol, normal boiling point 145 °C at 101.325 kPa, density 0.906 g/cm³ at 20 °C, closed-cup flash point 31 °C, and autoignition temperature 490 °C. The monomer is...
Styrene Monomer Price per Ton 2026: FOB China Guide FOB China styrene monomer quotations for 2026 require a price assessment framework that distinguishes the benchmark from cargo-specific adjustments. Under Incoterms 2020 FOB terms, the seller bears export clearance and loading costs until the product crosses the vessel rail at the...
What Drives Styrene Prices: Benzene, Ethylene & PO Co-Product Styrene monomer (100-42-5) is a liquid aromatic intermediate whose price formation cannot be separated from the two primary feedstocks, benzene and ethylene, and, in the propylene oxide co-production route, from the co-product credit for propylene oxide. Global styrene capacity is split...
How to Audit a Styrene Supplier: Plant, Inhibitor & Safety Styrene monomer (CAS 100-42-5) is a reactive aromatic monomer used in polystyrene, acrylonitrile-butadiene-styrene copolymers, styrene-acrylonitrile resins, and unsaturated polyester resin manufacture. A supplier audit that stops at the certificate of analysis for ASTM D2827-19 does not address whether the plant...
Styrene monomer is supplied as a polymerizable aromatic hydrocarbon with the molecular structure C6H5CH=CH2; the commercial polymer-grade monomer is commonly assessed against ASTM D2827. The product is classified as a flammable liquid under UN 2055, Class 3, Packing Group III, with a closed-cup flash point of 31 °C, an autoignition...
Styrene monomer (CAS 100-42-5) is a high-volume aromatic intermediate consumed mainly in polystyrene, expandable polystyrene, acrylonitrile-butadiene-styrene, styrene-acrylonitrile, styrene-butadiene rubber, and unsaturated polyester resin production. The supply chain is governed by three linked failure modes: scheduled dehydrogenation turnarounds, area-wide force majeure declarations affecting ethylene and benzene feedstocks, and spontaneous polymerization that...
Styrene procurement for a polystyrene (PS) or acrylonitrile-butadiene-styrene (ABS) polymerization plant is not a bulk feedstock purchase but a control variable for free-radical reaction kinetics, inhibitor induction time, and continuous devolatilization mass balance. Polymer-grade styrene traded under long-term contracts and spot cargoes may carry identical nominal purity and still differ...
Styrene UN 2055 Class 3: DG Shipping Guide (Stabilized) Styrene monomer, identified under the UN system as UN 2055, is regulated as a flammable liquid of Class 3, Packing Group III. The proper shipping name “Styrene monomer, stabilized” is used because the product requires a polymerisation inhibitor during transport. The...
Styrene monomer, CAS 100-42-5, is transported under UN 2055 as a Class 3 flammable liquid with a closed-cup flash point of 31°C and a boiling point of 145°C at 101.3 kPa. The assigned ISO tank container, constructed to ISO 1496-3:2019 with a 316L stainless steel shell and a working pressure...
Styrene in steel drums as a 180 kg packaging and loading configuration is specified for downstream suspension polymerisation, unsaturated polyester resin manufacture, and emulsion copolymerisation operations. The monomer is filled as a stabilized aromatic hydrocarbon with a closed-cup flash point of 31 °C (ISO 2719:2016), a normal boiling point of...
Styrene (ethenylbenzene, C₆H₅CH=CH₂) is a liquid aromatic vinyl monomer with CAS 100-42-5 and EC 202-851-5. Commercial styrene monomer is produced principally by direct dehydrogenation of ethylbenzene over a potassium-promoted iron oxide catalyst at 600–650°C, followed by vacuum distillation to separate styrene from unreacted ethylbenzene and heavy by-products. A parallel route...
Importing Styrene into India: License, Duty & Ports begins with Indian Customs Tariff heading 2902 50 00 and CAS 100-42-5. The monomer is the principal vinyl aromatic feedstock for general-purpose polystyrene, expandable polystyrene, acrylonitrile-butadiene-styrene, styrene-acrylonitrile, unsaturated polyester resins, and styrene-butadiene rubber. In transit, the material is shipped as an inhibited...
The logistics of shipping Styrene from China: Ports & Lead Times are governed by the monomer’s flammable-liquid classification, its tendency to polymerize during extended transit, and the physical characteristics of Chinese export terminals. Styrene monomer is consigned as Styrene monomer, stabilized under UN 2055, transport class 3, packing group III....
Styrene monomer, C6H5CH=CH2 (CAS 100-42-5), is supplied as a reactive vinyl aromatic with 4-tert-butylcatechol (TBC) as the standard inhibitor. The certified TBC range under ASTM D2827 is generally 10–15 mg/kg. TBC does not function as a permanent antioxidant; it terminates propagating styryl radicals by hydrogen transfer and must be continuously...
Styrene (CAS 100-42-5) is a benzene-derived aromatic monomer shipped as “Styrene monomer, stabilized” under UN 2055, Class 3, Packing Group III. In bulk marine and road-tank logistics, the material is frequently cross-referenced with ethylbenzene (CAS 100-41-4, UN 1175, Class 3, Packing Group II) because ethylbenzene is the immediate upstream dehydrogenation...
Merchant styrene monomer (CAS 100-42-5, C8H8, molecular weight 104.15 g/mol) is a flammable vinyl aromatic liquid with a boiling point of 145.2°C at 101.3 kPa, a closed-cup flash point of 31°C, an auto-ignition temperature of 490°C, and explosion limits of 1.1–6.1 vol% in air. Chinese coastal suppliers in 2026 ship...
Styrene monomer, C8H8, CAS 100-42-5, is an aromatic vinyl compound with molecular weight 104.15 g/mol, boiling point 145 °C at 101.3 kPa, density 0.909 g/cm³ at 20 °C, vapor pressure 0.67 kPa at 20 °C, closed-cup flash point 31 °C, and autoignition temperature approximately 490 °C. The lower and upper...
Styrene monomer (CAS 100-42-5) is imported into India under Customs Tariff Item 2902 50 00, and the India Styrene Market: Duty, Demand & Ports is defined by an import-dependent consumption pattern. Public trade statistics indicate apparent demand between 0.8 and 0.9 million tonnes per annum, with imports covering approximately 60%...
Styrene Supply to Turkey: Market & Duty Guide Styrene monomer, CAS 100-42-5 and EC 202-851-5, is a liquid aromatic vinyl monomer with molecular formula C₈H₈. Commercial polymer-grade material is supplied with a purity of 99.7–99.85 wt%, ethylbenzene content below 0.08 wt%, and 4-tert-butylcatechol inhibitor at 10–15 mg/kg. Physical transport parameters...
Styrene monomer (CAS 100-42-5), with a flash point of 31 °C, an autoignition temperature near 490 °C, and a vapor flammability range of 0.9–6.8 vol% in air, is a reactive aromatic vinyl feedstock for polystyrene, expandable polystyrene, acrylonitrile-butadiene-styrene, unsaturated polyester resin, and styrene-butadiene rubber. This technical review addresses Styrene Supply...
Styrene supply to Brazil & Latin America is concentrated in bulk marine parcels because the region’s downstream polymerisation assets require a narrow monomer specification and predictable long-term storage stability. Styrene (CAS 100-42-5; molecular weight 104.15 g/mol) is a vinyl aromatic hydrocarbon shipped as UN 2055, Class 3, Packing Group III...
In trade documentation covering styrene supply to Egypt, Middle East & Africa, bulk monomer is certified against ASTM D2827 with a minimum assay of 99.7 wt%, a polymer content below 10 mg/kg, and 4-tert-butylcatechol inhibitor present at 10–15 mg/kg. The molecular weight of the monomer is 104.15 g/mol; density at...
In 2024, the global styrene monomer market operated at a nameplate capacity exceeding 40,000,000 metric tons per annum, with the People's Republic of China responsible for approximately 31–33% of worldwide production. Chinese nameplate capacity crossed 15,000,000 metric tons per year following the commissioning of integrated refinery-petrochemical complexes in Zhejiang, Liaoning,...
Styrene monomer, C₆H₅CH=CH₂, CAS 100-42-5, is imported under HTSUS 2902.50.0000 and EU CN code 2902 50 00. The current enforcement position under the exact heading EU & US Trade Measures on Styrene: Status Check is asymmetric: the European Union maintains a definitive antidumping duty on styrene monomer originating in the...
Styrene vs Ethylbenzene: Process & Price Differences Styrene monomer (CAS 100-42-5) and ethylbenzene (CAS 100-41-4) are separated by one dehydrogenation step, yet the two chemicals occupy different positions in aromatics value chains. Styrene is produced predominantly by catalytic dehydrogenation of ethylbenzene, while ethylbenzene is produced by alkylation of benzene with...
Styrene vs Alpha-Methylstyrene (AMS): When Interchangeable Styrene (C8H8, molar mass 104.15 g/mol) and alpha-methylstyrene (C9H10, molar mass 118.18 g/mol) differ by a methyl substituent on the alpha carbon. That single structural change lowers the free-radical homopolymerisation ceiling temperature from approximately 310°C to 61°C, raises the homopolymer glass transition temperature from...
In styrenic polymer systems, Styrene vs Divinylbenzene (DVB): Crosslinker Selection is a decision between monofunctional chain extension and tetrafunctional network formation. Styrene monomer is specified under ASTM D2827 with assay, polymer, inhibitor, and aldehyde limits; it has a molar mass of 104.15 g/mol, density of 0.906 g/cm³ at 25 °C,...
Styrene, CAS 100-42-5, molar mass 104.15 g mol⁻¹, boiling point 145 °C at 101.3 kPa, flash point 31 °C, lower explosive limit 0.9 vol%, upper explosive limit 6.8 vol%, vapour pressure 0.67 kPa at 20 °C. In unsaturated polyester resin (UPR), styrene is not a passive solvent but a reactive...
Styrene substitutes when prices spike are evaluated against the baseline monomer’s safety, volatility, viscosity, and copolymerization behaviour. Styrene at 99.8% monomer purity has a boiling point of 145 °C at 101.3 kPa, a density of 0.906 g/cm³ at 20 °C, a closed-cup flash point near 31 °C, and a vapour...
Bio-Based Styrene: Status Check within current styrene monomer supply is best understood as a carbon-source question rather than a molecular identity question. Styrene (CAS 100-42-5) is an aromatic vinyl monomer with global nameplate capacity typically reported above 30 Mt/a. The conventional route alkylates benzene with ethylene to ethylbenzene and then...
Styrene emission control in FRP shops encompasses two distinct engineering layers: local exhaust ventilation and resin-side volatility modification. Within resin-side modification, styrene emission control in FRP shops: vapor suppressants refers to film-forming additives compounded into unsaturated polyester or vinyl ester resin to reduce monomer release from open molds. Styrene has...
The monomer styrene (CAS 100-42-5, C8H8, molar mass 104.15 g/mol) is recovered from post-industrial and post-consumer polystyrene through a route commonly described as PS depolymerization: chemical recycling back to styrene. The aromatic substituent of polystyrene permits a comparatively high reversion selectivity because the styryl radical generated by depolymerization is resonance-stabilized,...
Polymerized Styrene Waste: Handling & Disposal is a critical operational boundary for styrene monomer storage facilities and downstream polystyrene processing units. Commercial styrene (CAS 100-42-5) is routinely stabilized with 10–15 mg/kg 4-tert-butylcatechol and dissolved oxygen; these co-inhibitors extend the induction period against thermally initiated free-radical polymerization. However, inhibitor depletion in...
Styrene Carbon Footprint & Scope 3 Data for the monomer are assembled from cradle-to-gate life-cycle inventories that integrate ethylbenzene alkylation, catalytic dehydrogenation, steam generation, distillation, and waste treatment. The compound, C8H8 with CAS 100-42-5, is manufactured primarily by catalytic dehydrogenation of ethylbenzene over potassium-promoted iron oxide catalysts in multi-stage adiabatic...
Styrene (CAS 100-42-5; HS 2902.50) is an aromatic vinyl monomer with normal boiling point 145 °C and flash point 31 °C. It is produced by ethylbenzene dehydrogenation and propylene oxide/styrene monomer co-production. Commercial polymer-grade styrene is released under ASTM D2827-20; the dominant inhibitor is 4-tert-butylcatechol at 10–15 mg/kg. The trade...
Global Styrene Oversupply & Trade Flow Outlook 2026-2030 Styrene monomer (C6H5CH=CH2, molar mass 104.15 g/mol, boiling point 145°C at 101.3 kPa, density 0.906 g/cm³ at 20°C) enters the 2026–2030 planning window with a structurally long merchant market. The Global Styrene Oversupply & Trade Flow Outlook 2026-2030 is governed less by...
Styrene (CAS 100-42-5, C8H8) is produced predominantly by catalytic dehydrogenation of ethylbenzene over potassium-promoted iron oxide in adiabatic fixed-bed reactors operating at reactor outlet temperatures of 600–650 °C and steam-to-hydrocarbon mass ratios of 1.0–1.5. Polymer-grade monomer intended for expandable polystyrene is controlled to 99.7 wt% minimum purity under ASTM D2827-20,...
Styrene, CAS 100-42-5, is a vinyl aromatic monomer with boiling point 145°C, flash point 31°C closed cup, vapour pressure 0.67 kPa at 20°C, density 0.906 g/cm³ at 20°C, lower explosive limit 0.9 vol% and upper explosive limit 6.8 vol%. Commercial monomer is inhibited with 10–15 ppm 4-tert-butylcatechol to block radical-chain...
Styrene Physical Properties Table: BP, FP, Density & Solubility values for inhibited commercial monomer are compiled below for process engineers setting storage, transfer, venting, and polymer feed conditions. The aromatic vinyl monomer is identified as CAS 100-42-5, molecular formula C₈H₈, and molar mass 104.15 g/mol. In normal production, the product...
Under ASTM D2827-20, styrene monomer is normally inhibited with 4-tert-butylcatechol at 10–15 mg/kg to extend the induction period before free-radical polymerization can propagate. The inhibitor inventory does not stop radical generation; it consumes thermally generated radicals and suppresses chain growth until a critical depletion threshold is reached. In production-scale storage,...
The Styrene Safety Data Quick Card: PEL, LEL & PPE consolidates the threshold values that separate routine monomer charging, reactor feed, and open-mold lamination from confined-space entry and hot-work isolation. Styrene (CAS 100-42-5) has an OSHA permissible exposure limit of 100 ppm as an 8-hour time-weighted average under 29 CFR...
Styrene monomer (CAS 100-42-5) is an aromatic vinyl monomer with a normal boiling point of 145.2 °C at 101.325 kPa and a closed-cup flash point of 31 °C. The commercial product is inhibited with p-tert-butylcatechol to suppress polymerization during transport and storage. Producer release programs commonly distinguish PM-grade styrene from...
