4-Bromotoluene

    • Product Name: 4-Bromotoluene
    • Alias: p-bromotoluene
    • Einecs: 202-527-6
    • Mininmum Order: 1 g
    • Factroy Site: Yudu County, Ganzhou, Jiangxi, China
    • Price Inquiry: admin@ascent-chem.com
    • Manufacturer: Ascent Petrochem Holdings Co., Limited
    • CONTACT NOW
    Specifications

    HS Code

    681720

    Cas Number 106-38-7
    Molecular Formula C7H7Br
    Molecular Weight 171.04 g/mol
    Appearance Colorless to pale yellow liquid
    Melting Point -1 °C
    Boiling Point 184-186 °C
    Density 1.39 g/cm³ at 25 °C
    Solubility In Water Insoluble
    Refractive Index 1.563 at 20 °C
    Flash Point 67 °C
    Purity Typically ≥98%
    Synonyms p-Bromotoluene; 1-Bromo-4-methylbenzene

    As an accredited 4-Bromotoluene factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.

    Packing & Storage
    Packing 4-Bromotoluene is supplied in a 500 mL amber glass bottle with a tightly sealed cap and proper hazard labeling for safe handling.
    Shipping 4-Bromotoluene should be shipped in compliant, tightly sealed containers to prevent leaks. It must be labeled as a hazardous material and handled according to local and international regulations. Transport in cool, well-ventilated conditions, away from sources of ignition. Ensure packaging provides protection against physical damage during transit.
    Storage 4-Bromotoluene should be stored in a cool, dry, well-ventilated area, away from sources of ignition, heat, and direct sunlight. Keep the container tightly closed and protected from physical damage. Store separately from oxidizing agents, acids, and bases. Use only in chemically compatible containers, and ensure proper labeling. Follow all relevant safety and regulatory guidelines for chemical storage.
    Application of 4-Bromotoluene

    Applications of 4-Bromotoluene in Industrial Manufacturing

    Our production of 4-Bromotoluene supports multiple precision chemical sectors. Below we outline primary downstream scenarios, highlighting compliance, dosage, integration point, and resulting end-products.

    1. Pharmaceutical Intermediates: Sartan API Synthesis

    Major pharmaceutical enterprises utilize 4-Bromotoluene to synthesize advanced intermediates in angiotensin receptor blocker (ARB) APIs such as Valsartan and Losartan. The high-purity requirement and controlled bromination steps ensure traceability throughout multi-stage reaction chains. Our consistent specification addresses the selective Suzuki coupling to form biphenyl derivatives, supporting FDA and EMA-regulated API manufacturing. The bromobenzyl core enters the process during initial arylation, enabling efficient scale-up in GMP-compliant flow chemistry.

    Industry compliance standards

    • ICH Q7 GMP for Active Pharmaceutical Ingredients
    • USP/NF and Ph. Eur. reference monographs for ARB APIs
    • FDA 21 CFR 211 for process validation and batch records
    • EMA guidelines on starting materials categorization

    Typical usage ratio

    • 0.8–1.2 molar equivalents versus coupling partners; adjusted based on aryl substrate reactivity and process yield requirements

    Downstream process integration

    • Key aryl halide in the initial Suzuki–Miyaura cross-coupling
    • Activated during early-stage synthesis before further nitration or amidation
    • Inline quality control for bromine content and residual solvents at each batch
    • Integrated under closed-system handling within GMP API plants

    Final product types

    • Valsartan (Antihypertensive API)
    • Losartan (Antihypertensive API)
    • Novel biphenyl intermediates for ARB drug candidates
    • Pharmaceutical-grade advanced intermediates

    2. Agrochemical Synthesis: Herbicide Intermediate Manufacturing

    Leading agrochemical manufacturers incorporate this compound as a brominated aromatic building block for synthesizing key intermediates found in popular herbicidal products. Especially valuable in formulating substituted anilines and benzonitriles, the material supports conventional chlorination and nitration steps under fine chemical plant protocols. The batch-wise reaction strategy requires consistent lot-to-lot purity, enabling downstream halogen exchange necessary for construction of crop-protection actives with precise isomer specificity.

    Industry compliance standards

    • ISO 9001:2015 certified process management
    • REACH Annex II for registration of chemical intermediates
    • China National Standards (GB) for environmental emissions
    • OECD GLP guidelines for environmental impact studies

    Typical usage ratio

    • 15–25% by weight within the aniline or nitrile precursor batch; varies with target molecule substitution profile

    Downstream process integration

    • Introduced as a halogenating agent in the aryl modification stage
    • Mixed with sodium cyanide, aluminum chloride, or other reagents for nucleophilic substitutions
    • In-process GC/MS confirms selectivity and limits over-halogenation
    • Controlled feed into multitonne reactor trains

    Final product types

    • Brominated benzonitrile herbicide intermediates
    • Substituted aniline derivatives for selective weed control
    • Precursor compounds for triazine and phenoxy herbicide actives
    • Isomer-specific agrochemical intermediates

    3. Dyes & Pigments: Aryl Bromide in Specialty Azo Dye Production

    Colorant manufacturers use 4-Bromotoluene as an essential input for step-growth syntheses of bright azo and anthraquinone pigments. Its defined monosubstitution offers controlled site reactivity during diazotization or coupling with amine components. Quality consistency is vital for achieving uniform shade intensity and fastness properties. We supply this material with low-metal impurity content, supporting pigment makers' compliance with strict colorant toxicity regulations for textiles, plastics, and inks destined for export markets.

    Industry compliance standards

    • EN 71-3: Safety of Toys (Migration of Certain Elements)
    • REACH Annex XVII restrictions on aromatic amines
    • Oeko-Tex Standard 100 (textile colorant guidelines)
    • ASTM D476-20 for pigment performance and consistency

    Typical usage ratio

    • 10–18% by mass of the final dye intermediate mixture; adjusted according to target chromophore density and specific pigment system

    Downstream process integration

    • Bromotoluene introduced at the controlled arylation or diazotization phase
    • Combined with nitro or amino compounds in solvent-based reactors
    • Batch sample analysis for hue and purity after each coupling stage
    • Incinerator residue managed under hazardous waste protocols

    Final product types

    • High-fastness azo textile dyes
    • Solvent-resistant pigments for coatings and inks
    • Colorant bases for plastics and masterbatches
    • Specialty dye intermediates for printing textiles and papers

    4. Electronic Chemicals: Precursor in OLED Material Synthesis

    Producers of organic electronic materials integrate this compound in the fabrication of OLED (organic light-emitting diode) emitter and transport layer materials. Molecular engineers rely on the controlled reactivity of the para-brominated methylbenzene skeleton for custom arylation, forming key small-molecule and polymeric building blocks privileged in next-generation display panels. Extensive purification and metal content tests ensure compatibility with ISO cleanroom specifications for semiconductor production.

    Industry compliance standards

    • SEMATECH E46-0306 for chemical purity in semiconductor applications
    • IPC-4101D for base material quality control
    • ISO 14644 for cleanroom process integration
    • RoHS directive 2011/65/EU—Restriction of Hazardous Substances

    Typical usage ratio

    • 5–9% of total mass in small-molecule or polymer OLED synthesis batches; tuned for charge mobility, layer thickness, and device efficiency

    Downstream process integration

    • Fed at aryl halide cross-coupling stage in ligand-assisted polymerization
    • Strict QC on trace metal and halide residues to protect device properties
    • Formulated within ultrapure solvents and reagents in Class 100 or 1000 conditions
    • Inline filtration and microcontamination control throughout production chain

    Final product types

    • OLED emitter molecules
    • Hole/charge transport materials for display panels
    • Photoresist intermediates for flat panel fabrication
    • Advanced optoelectronic intermediates

    5. Fine Chemical Synthesis: Benzylation and Bromination Reagents

    Custom and contract manufacturers value 4-Bromotoluene as a selective benzylation reagent and bromine source for multi-step fine chemical programs. Its defined reactivity supports nucleophilic substitutions and directed ortho-metalations under controlled low-temperature conditions. Fine chemical specialists optimize its introduction based on catalytic system compatibility and downstream product volatility, ensuring strict mass-balance control across scale-up to meet international order specifications and internal SHE/Q requirements.

    Industry compliance standards

    • ISO 14001:2015 for environmental management in specialty syntheses
    • GHS SDS requirements for hazard communication
    • REACH and TSCA registry for specialty chemical intermediates
    • AIChE CCPS protocols for handling brominated reagents

    Typical usage ratio

    • 3–12 mol% as functional group transfer agent in fine chemical synthesis; adjusted according to side-chain reactivity and conversion efficiency

    Downstream process integration

    • Bromotoluene introduced during electrophilic aromatic substitution or nucleophilic substitution stages
    • Monitored by in-process NMR or GC/FID for conversion and selectivity
    • Packed and dispensed in inert gas protected vessels to prevent moisture uptake
    • Waste stream segregated per brominated organics protocol

    Final product types

    • Custom aromatic compounds for R&D
    • Intermediates for chiral ligand production
    • Specialty performance chemicals
    • Niche brominated fine chemical stocks
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    Certification & Compliance
    More Introduction

    4-Bromotoluene: Real Experience from the Source

    Our Direct Connection to Production

    4-Bromotoluene plays an essential role on our production floor. Every day, our teams produce this specialty chemical to a reliable level of purity, overseeing each step from raw material handling to final drum filling. Manufacturing creates a relationship with the product. We see what makes it valuable for others in the industry and why specific demands keep recurring from our regular buyers year after year.

    Product Characteristics and Manufacturing Know-How

    4-Bromotoluene, with its molecular structure comprising a bromine atom attached to a toluene ring, carries both simplicity and versatility. The industrial formula is C7H7Br, resulting in a clear, colorless to pale yellow liquid under typical storage conditions. Boiling range falls near 184–186°C, and it sinks in water but remains very soluble in common organic solvents. Not every process treats this substance with the respect it deserves. Unwanted impurities or side-products cause headaches downstream for chemists using 4-Bromotoluene as a starting material, so our plant places a strong emphasis on consistent purification. Packing and sampling are just as important; a clean, dry, inert environment preserves quality.

    The line operators have learned, through hundreds of production cycles, which minor changes can alter the product’s attributes. For example, the presence of oxygen during bromination skews the yield and increases byproducts like dibromotoluenes, which our analytical lab then must monitor even more closely. We sweat the details so our shipments can integrate smoothly into our customers’ reaction systems. That awareness comes only from hands-on production.

    Usage Patterns We See Across Industries

    Much of our product ends up in pharmaceutical plants and agrochemical manufacturers. Chemists use 4-Bromotoluene broadly as a building block or intermediate—introducing bromine atoms selectively onto benzene rings helps lay the groundwork for biologically active molecules. From a supply perspective, we notice that demand picks up when a new generic API scales up or when a certain class of crop protection compounds hits pilot stage.

    Outside the pharmaceutical world, electronics-grade versions move into specialty material synthesis, polymers, and dye intermediates. High purity, often at “4N” (99.99 percent) or above, gets strict attention in these applications. As the originator, producing for electronic applications presses us to tighten purification and ensure metal ion content stays below demanding thresholds. Any deviation will lead to issues in downstream lithography or chemical vapor deposition zones at our clients’ sites.

    Seeing the Differences: How 4-Bromotoluene Stands Apart

    As a manufacturer with decades in the field, we have worked with the full range of toluene derivatives and haloarenes. Compared to its close cousin, 2-bromotoluene, the 4-position bromo group on the ring gives distinct reactivity. We always remind customers that the position affects both the electronic distribution and steric hindrance, which directly impacts reaction speeds in cross-coupling or nucleophilic substitution projects. 4-Bromotoluene’s unique position sometimes provides cleaner products and higher reactivity when making biphenyl systems or introducing bulkier substituents at the para position.

    Unlike bromobenzene, 4-Bromotoluene contains a methyl group that takes the chemistry further. The methyl group offers another handle for functionalization, enabling synthetic routes for top-selling pharmaceuticals or fine chemicals. Our R&D teams frequently test whether the cheaper bromobenzene could substitute, but often, only 4-Bromotoluene can do the job for sophisticated transformations. Process chemists notice big differences in side reactions, yields, and scalability depending on which version is in use.

    Why Quality Bears Direct Impact

    Makers like us notice instantly that 4-Bromotoluene doesn’t forgive mistakes in handling. If storage isn’t dry and tightly sealed between production and dispatch, product color shifts and purity drops from micro levels of oxidation. Freshness is not just a selling phrase—it makes or breaks batch production for customers working at high value-add stages. Our floor supervisors regularly document the timelines between batch completion and drum sealing to back up freshness claims; only frequent measurement and real process checks create trust with partners who risk millions of dollars in their active ingredient campaigns.

    We have found, through experience, that analytical transparency makes all the difference. Gas chromatography forms the backbone of our batch controls, but we regularly run NMR and ICP-MS for especially challenging lots. That’s the level of comfort our end-users require, because a single trace solvent impurity or excessive iron content can trigger expensive rework for them or worse, batch rejection. Synthetic success always begins with reliable, repeatable intermediates.

    Lessons from Production Challenges

    Working from raw, industrial bromine in barrels and bulk toluene, workers face hazards that can’t be glossed over. Each reaction step during bromination gives off strong, irritating fumes—our ventilation standards must keep pace, or local exposure limits creep up. Choosing the right reaction temperature controls both safety and product selectivity. Some competitors chase higher throughputs with little regard for side reactions, but over years, we have seen that missteps at this early stage return later as lost clients or large-scale complaints. So much of the success in brominated intermediates hinges on vigilance in the fundamentals, not just marketing speak.

    From time to time, we’ve had batches slightly off-spec on water content or color. That teaches a direct lesson about water management both in equipment and in raw materials. Each event drives improvements—a tank upgrade here, an extra analysis there. Over the years, we built a set of controls upstream and downstream to ensure those issues become exceptionally rare. Customers rarely hear about these learning moments, but every corrective action improves our average product quality.

    Unlocking More Value through Application Support

    Our daily phone calls and emails are filled with application questions. The synthetic community looks for technical advice, not just material logistics. Sometimes a client runs into solubility issues, or sees a mysterious impurity mid-process—they want a partner who actually sees the molecule from creation to shipping, not just a sales desk. Many requests aren’t “on spec” problems, but troubleshooting: solvent compatibility for an oddball cross-coupling, advice on proper temperature range, transport options that won’t degrade the product before delivery.

    Over the years, our lab chemists have collaborated closely with end users, replicating their target chemistry in glassware before advising on scale-up. Being able to check exactly how our 4-Bromotoluene interacts with specific bases, ligands, or recovery methods saves everyone time and cost. We know, from constant requests, that speed of response and practical experience are valued more than a polished brochure. That connection forms the actual support structure that process scale chemistry needs in the modern world.

    Economic and Regulatory Realities

    4-Bromotoluene land squarely in dozens of regulated markets. Our familiarity with registration, documentation, and performance testing runs deep. Importers often need original production certificates, full past lot analyses, and reassurance on handling conditions—offering every piece quickly keeps projects moving for our buyers. The regulatory side has increased in detail over the last decade, as trace contaminants and sustainability claims come under closer scrutiny. More and more often, we get requests for documentation on raw material origin or full supply chain traceability, right down to the handler who weighed the charges.

    Rising environmental and waste management expectations affect not just what happens at our loading dock, but throughout the lifecycle of deliverable materials. As the original producers, we witness the day-to-day impact of these evolving norms. Plans for on-site bromine recovery, solvent recycling, and renewable energy usage aren’t add-ons—they’re becoming requirements for everyone’s continued access to world chemical supply routes. Offering complete, honest disclosure on our own sustainability challenges meets end users where they are, not just telling a good story for compliance purposes.

    Moving More Material without Compromising Consistency

    Logistics present a daily series of puzzles for our dispatch team. Given that 4-Bromotoluene is a regulated hazardous material, only manufacturers with on-site loading capabilities and the right container set can guarantee rapid, injury-free shipping. Strict temperature management and moisture exclusion go into every shipment protocol. Shipment delays during warm months, for example, can change a liquid's properties or even raise risk of container compromise. These practical lessons keep the operation sharp and attentive.

    Our direct distribution system tracks every metric, down to unloading patterns at the customer’s dock. If crystallization or phase separation occurs, our techs are the first to study the causes, giving feedback to both buyers and our own crew. We work under scrutiny not just from regulators, but from partners who rely on long-term chemical resilience and performance. Maintaining these relationships relies on proving that scale-up and delivery can support even the most complex projects, every time.

    Supporting Innovation across Lab Scales and Bulk Projects

    Working directly with research chemists and production engineers enhances the feedback loop. As a manufacturer, we see the requests for kilogram batches destined for bench chemistry as well as multi-ton campaigns for major launches. The needs differ at each scale. A research scientist wants a certificate of analysis attached to a small amber bottle, sometimes with detailed spectral data, all within days. In contrast, a full-scale plant project demands drum or IBC quantities to tight delivery windows, with every shipment cross-checked for consistency and compliance. Adapting our process to meet both small and large requests makes the difference in maintaining trust and project momentum.

    Smaller scale sales often lead to innovation—new synthetic routes, process improvements, or time savings. Once a method succeeds in the lab, scale-up predictions become reality. We watch, over time, as these projects graduate from vials to tanks to true industrial production. Having shared experience from a manufacturing perspective allows us to smooth these transitions, ensuring each scale jump matches expectations. Researchers value not just product access but real-world data from prior campaigns and technical notes they can trust from the source.

    Key Safety Observations from Direct Handling

    Producing and packing 4-Bromotoluene day in and day out drives a solid grounding in practical safety. The product has potential toxicity and can affect both skin and lungs—containment, spill procedures, and monitoring keep the workplace safe. Strict use of personal protective equipment, air sampling, and emergency planning go into every production shift. Our career health and safety officers conduct weekly audits of the reaction areas, storage points, and packaging lines. Years of risk assessment teach us to address even small exposures proactively, so both the team and the product remain protected from contamination and incident.

    The safety standards extend to bulk storage and shipping. Direct experience dealing with storms, temperature excursions, and international delays inform our safeguards against unexpected degradation. If a drum leaks during transit or a seal fails, our staff handles both the cleanup and the investigation, creating protocols to avoid repeats. Every incident review translates into new checklist items and higher awareness—protecting supply chain continuity benefits our partners around the globe.

    Continuous Improvement Driven by the Realities of Production

    We never look at 4-Bromotoluene as a static commodity. Each campaign teaches something new about process optimization, customer requirements, and industry shifts. Rising demand for no-halogen or alternative aryl reagents puts pressure on our process engineering to deliver upgrades when needed. Advancements in catalytic conversion and purification technologies allow us to supply cleaner, more efficient intermediates as chemistry moves forward. This perspective, gained over years of real exposure and adjustment, keeps the business sustainable and connected to those who depend on reliable materials.

    We invest in a cycle of learning and reinvestment. Equipment upgrades after batch incidents aren’t luxury spending—they’re necessary to maintain high-integirty outputs. Ongoing training for operators, lab techs, and safety supervisors reflects the true cost of retaining talented staff and preventing costly incidents. Our ability to meet shifting technical and regulatory expectations ties directly to willingness to learn from every drum, every incident, and every new customer challenge.

    Looking Forward: Meeting Tomorrow’s Chemical Demands

    4-Bromotoluene remains, for us, more than just another item in the catalog. Watching it move from our reactors to the hands of process chemists forms the lifeblood of our daily work. Success lies in how closely product matches purpose—supporting new molecules, new technologies, and new market demands. Real success, for us as original manufacturers, comes from relationships built on transparency, honest technical support, and a willingness to adapt to new realities.

    The industry will keep changing, with mounting pressures for sustainability, traceability, and regulatory precision. From our seat at the start of the supply chain, we see these as opportunities to strengthen processes, foster open feedback, and develop safer, more stable supply lines. Reliable intermediates serve as the bridge between innovation and realization, and each delivery of 4-Bromotoluene ties us to outcomes far beyond our loading docks.

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