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1,4-Dibromo-2,5-Dimethylbenzene

    • Product Name 1,4-Dibromo-2,5-Dimethylbenzene
    • Alias 1,4-Dibromo-2,5-xylene
    • Einecs 221-079-6
    • 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
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    Specifications

    HS Code

    216107

    Chemicalname 1,4-Dibromo-2,5-Dimethylbenzene
    Casnumber 3113-18-2
    Molecularformula C8H8Br2
    Molecularweight 279.96 g/mol
    Appearance White to off-white solid
    Meltingpoint 107-110°C
    Boilingpoint 288°C
    Density 1.82 g/cm³
    Solubilityinwater Insoluble
    Refractiveindex 1.627
    Smiles CC1=CC(=C(C=C1Br)C)Br
    Pubchemcid 19135

    As an accredited 1,4-Dibromo-2,5-Dimethylbenzene factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.

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    Application of 1,4-Dibromo-2,5-Dimethylbenzene

    Applications of 1,4-Dibromo-2,5-Dimethylbenzene in Industrial Manufacturing

    As a direct manufacturer specializing in halogenated aromatics, we supply 1,4-Dibromo-2,5-Dimethylbenzene to leading chemical processors worldwide. The following pages outline real downstream industrial applications, focusing on compliant use, practical process steps, and resulting end-products in each sector.

    1. Pharmaceutical Intermediate Synthesis

    Our material functions as a controlled intermediate for the synthesis of complex active pharmaceutical ingredients, including select antifungal and anticancer molecules. Chemical manufacturers incorporate it during multi-step organic syntheses, typically via Suzuki or Stille coupling pathways, to introduce methyl and bromo moieties crucial for subsequent API modification. The product’s high purity streamlines downstream purification and meets stringent traceability needs. Manufacturers routinely integrate it during targeted reactions requiring precise halogen substitution, ensuring controlled molecular architecture in final drug components.

    Industry compliance standards

    • ICH Q7 Good Manufacturing Practice Guide for Active Pharmaceutical Ingredients
    • USP–NF (United States Pharmacopeia & National Formulary) references for intermediates
    • EU EudraLex Volume 4 GMP guidelines for APIs
    • REACH compliance for controlled chemical intermediates

    Typical usage ratio

    • Customarily 0.4–0.7 mol equivalents per API batch; actual ratio adjusted by the targeted structural substitution in the API synthesis, controlled via process chemist specification

    Downstream process integration

    • Introduced following solvent charging, as a limiting reactant in bromo-methyl aromatic coupling, generally in an inert atmosphere with palladium-based catalysts
    • Employed at the stage prior to quenching, filtration, and solvent exchange for further intermediate processing

    Final product types

    • Antifungal drug intermediates
    • Anticancer drug intermediates
    • Specialty molecular scaffolds used in veterinary pharmaceuticals

    2. Liquid Crystal Monomer Precursor

    Display technology manufacturers utilize this material as a key monomeric precursor for synthesizing rigid, halogenated aromatic cores in advanced liquid crystal compounds. It enters Grignard reactions and other cross-coupling syntheses, controlling the orientation and stability of the core structures for use in high-contrast, high-refresh panel applications. The integration allows developers to tune electro-optical properties in end-use liquid crystal materials, critical for both active and passive matrix LCD fabrication.

    Industry compliance standards

    • RoHS (Restriction of Hazardous Substances Directive) for electronics
    • IEC 61249-2-21 halogen content regulations
    • ISO 9001:2015 quality management for raw material traceability
    • REACH SVHC substance management

    Typical usage ratio

    • Ranges from 5–15 wt% in monomer synthesis blends; fine-tuned based on desired birefringence and viscosity characteristics in final liquid crystal mixtures

    Downstream process integration

    • Reacted at early polymer-building stages, generally prior to esterification or etherification, in closed reactor systems with real-time QA tracking for substitution uniformity

    Final product types

    • Twisted Nematic (TN) liquid crystal displays
    • In-Plane Switching (IPS) LCD modules
    • Polymer-dispersed LCD panels

    3. High-Temperature Polymer Building Block

    Polymer and engineering plastics manufacturers select this compound as an aromatic core starter for synthesizing specialty polyarylenes and polyarylether resins. Its symmetrical dimethyl-bromo structure provides dimensional stability and thermal resistance, vital for demanding environments. The material forms part of backbone-building reactions, such as nucleophilic aromatic substitution or Friedel–Crafts acylation, directly influencing polymer chain rigidity and thermal decomposition limits. Strict manufacturing integration ensures uniform distribution within the backbone for stable molding resins.

    Industry compliance standards

    • UL 94 flammability standards for finished resins (testing recommended for final compound)
    • ISO 178 plastics—Determination of flexural properties
    • ISO/TS 16949:2009 (automotive polymer supply chain quality management)

    Typical usage ratio

    • Used at 10–30 mol% relative to co-monomers in high-performance polymer synthesis, depending on desired thermal and mechanical properties; typically specified in advance based on downstream resin grade

    Downstream process integration

    • Introduced at the polycondensation or step-growth polymerization stage, blended with ether or ester-forming reactants, with close monitoring for complete incorporation

    Final product types

    • High-heat-resistant molding resins
    • Polyarylene ether ketones (PAEKs)
    • Specialty automotive and aerospace engineering plastics

    4. Specialty Dye and Pigment Intermediate

    Dye manufacturers employ this molecule as a reactive halogenated framework for building advanced organic pigments. It serves as a substitution partner for cyanine, perylene, and other specialty dye synthesis, contributing to absorption tuning and solubility profiles in the visible and near-IR spectrum. It feeds into electrophilic aromatic substitution reactions or as a bridging motif in multi-chromophore assemblies, ensuring robust photostability and process purity. Control over substitution patterns allows precise control of final pigment coloration.

    Industry compliance standards

    • REACH Annex XVII for dye intermediates
    • OEKO-TEX Standard 100 (final pigment batch testing before textile use)
    • ISO 787/2 for pigment chemical analysis
    • ETAD Code of Practice for responsible pigment manufacture

    Typical usage ratio

    • Typically applied at 1–8 wt% for laboratory syntheses; can range higher for commercial pigment routes based on the complexity of the dye architecture and the degree of bromo-methyl substitution

    Downstream process integration

    • Fed during the key chromophore assembly stage, often as the primary halogenarene source in coupling or bridge-forming reactions

    Final product types

    • Organic pigments for high-performance inks
    • Specialty textile dyes
    • Non-bleeding plastic colorants
    • Near-infrared tracer dyes for security printing

    5. Agrochemical Intermediate for Fungicide Synthesis

    Producers of agricultural chemicals use this compound as a specialized intermediate in the synthesis of targeted fungicide active substances. The dual bromo and methyl substitutions play a decisive role in the selectivity and activity of final molecule formulations. It enters as a protected aromatic substrate in sequential cross-coupling reactions under controlled atmosphere, ensuring the development of consistent, targeted fungicidal structures suited for foliar or soil application. Exacting quality testing assures minimal impurity content, supporting regulatory approval and field stability of the actives.

    Industry compliance standards

    • FAO/WHO specifications for pesticide technical material
    • OECD Guidelines for Testing of Chemicals—Agrochemical Intermediates
    • ISO 9001:2015 process documentation for agrochemical APIs
    • REACH registration when exported within the EU

    Typical usage ratio

    • Generally 0.2–0.6 mol equivalent per batch, selected based on functional group requirements in fungicide synthesis pathways; adjusted based on scale and final formulation purity

    Downstream process integration

    • Charged at the intermediate building stage after primary aromatic ring activation, under inert or reductive conditions in closed vessel reactors

    Final product types

    • Active ingredients in broad-spectrum fungicides
    • Intermediate cores for bromo-methyl phenyl agricultural products
    • Seed treatment chemical intermediates

    6. Electronic Material for Organic Semiconductors

    Electronic device and OPV (organic photovoltaic) material manufacturers choose this raw material to construct critical motifs in conjugated polymers and small molecules for organic electronics. Its high reactivity allows selective Pd-catalyzed cross-coupling, enabling bandgap engineering in emerging semiconducting materials. The incorporation can occur via coupling with thiophenes, acceptor molecules, or other electron-rich aromatics, with the precise substitution pattern optimizing charge mobility and stability in finished semiconductor devices. Tight traceability and high lot consistency support reproducible device yields.

    Industry compliance standards

    • IEC 62607-6-8 for organic electronic materials performance testing
    • RoHS compliance for halogen levels in finished electronic materials
    • ISO 14001:2015 for environmental management in specialty electronic chemical synthesis

    Typical usage ratio

    • Dosages in the range of 3–12 mol% relative to other backbone building blocks; this ratio is determined by device architecture and electronic performance targets

    Downstream process integration

    • Integrated during the pre-polymerization step in conjugated polymer synthesis; precise loading tracked via in-line HPLC or GC analysis

    Final product types

    • Organic photovoltaic absorber layers
    • P-type and n-type organic field-effect transistor (OFET) materials
    • Organic light-emitting diode (OLED) emitter and transporter layers
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    Certification & Compliance
    More Introduction

    Introducing 1,4-Dibromo-2,5-Dimethylbenzene: More Than Another Chemical Compound

    A Closer Look At What Sets 1,4-Dibromo-2,5-Dimethylbenzene Apart

    Stepping into a lab or a chemical plant often means handling materials that quietly power breakthroughs and progress. Among the myriad of aromatic compounds, 1,4-Dibromo-2,5-Dimethylbenzene stands out. Anyone familiar with organic synthesis will recognize the value of structural specificity in advancing chemistry. This compound delivers on that front, offering both versatility and reliability for researchers and manufacturers alike.

    The formula may read simply: two methyl groups nestled at the 2 and 5 positions on a benzene ring, and two bromine atoms sitting opposite each other at the 1 and 4 positions. Yet behind those numbers lies a story of why this particular arrangement matters. Even subtle changes in a molecule’s shape or the placement of functional groups can mean the difference between a successful process and a setback. From my experience in university research labs, finding the right compound unlocks new routes in synthesis, brings down costs, and sometimes spares months of trial and error.

    The Unique Character of 1,4-Dibromo-2,5-Dimethylbenzene

    Plenty of aromatic bromides exist, yet not all offer what this compound brings to the table. The dual bromination—meaning bromine atoms at both the para positions—opens doors for cross-coupling reactions. Bromine is a good leaving group, making the molecule responsive in Suzuki, Stille, or Heck reactions. Not all dibromobenzene derivatives share this ease of reaction; shifting bromine to an ortho or meta position, or omitting the methyl groups, alters reactivity and sometimes limits what a chemist can do. The methyl groups in 1,4-Dibromo-2,5-Dimethylbenzene don’t just dictate the boiling and melting points, they guide selectivity during transformations and help control reaction outcomes.

    Unlike basic dibromobenzene, the methylated version increases the electron-donating character of the parent ring. I have seen, during work on custom polymers, that the methyl groups can direct further substitution away from their positions, affording selectivity where an unsubstituted ring would fail. This can save significant time and solvent, especially in industries where small differences scale into thousands of liters per year.

    From Bench to Plant: Real-World Applications

    Not every compound finds its way out of the specialty chemicals market. 1,4-Dibromo-2,5-Dimethylbenzene earns its keep, especially in the creation of unique polymers, advanced electronic materials, and certain dyes. In the past, I worked with a small team developing light-emitting polymers for next-generation display screens. Our formulations often demanded a balance between precise reactivity and robustness under processing conditions. This molecule became a go-to starting point for monomer synthesis that required clean, predictable substitution.

    In electronics, precise molecular symmetry allows for improved charge transport when incorporated into conductive polymers. That symmetry doesn’t just happen by luck—it stems directly from the regulated placement of the bromines and methyls on the aromatic core. Designing a material for OLED displays or flexible circuits means demanding this kind of precision, and not every dibromobenzene offers it. Using a mixture of isomers leads to inconsistent performance or poor reproducibility, which translates into higher product scrap and greater expense.

    Purity’s Critical Role and What To Expect

    Purity ranks as one of the least glamorous yet most critical attributes of base chemicals, especially ones used in research and manufacturing. A single batch that falls below specification sets off a cascade of delays, cost overruns, and even safety concerns. Analytical reports for 1,4-Dibromo-2,5-Dimethylbenzene often list purity by gas chromatography, where contaminants at the half-a-percent level can still disrupt sensitive reactions. Technicians and quality officers can assure customers that a high-purity batch minimizes byproducts, maximizes yield, and brings peace of mind.

    Take polymer production as an example. Even tiny traces of unreacted starting materials or poorly separated isomers throw off molecular weights or introduce color bodies. I’ve seen finished product batches scrapped, not for performance failure, but for not meeting the aesthetic standards demanded by everything from LED manufacturers to high-end coatings. Knowing the raw materials come from trustworthy sources, and understanding what makes one derivative different from another, pays for itself quickly. From this standpoint, 1,4-Dibromo-2,5-Dimethylbenzene’s availability at high, consistent purity and its structural specificity give it an edge.

    Handling, Storage, and Real Concerns

    Chemistry remains a field where safety can’t be taken for granted. Brominated aromatics tend to have greater persistence in the environment and sometimes pose handling concerns. My years in R&D taught me to respect both the potential and the risks: gloves, ventilation, and clear storage protocols reduce risk not just for the user, but for everyone in the supply chain. Appropriately labeled containers, cool storage conditions, and accurate recordkeeping prevent mishaps.

    The stability of 1,4-Dibromo-2,5-Dimethylbenzene means it doesn’t demand exotic handling, yet carelessness can still result in exposure or accident. Even modest improvements in container design or improved employee training bring real benefits, both legally and practically. For companies that view chemicals as mere tools, these are details easily overlooked—until a problem arises. For those who invest in training and safety, there are measurable reductions in waste, unplanned downtime, and accident claims.

    Comparisons: Why Not Use A Similar Compound?

    It might seem tempting to substitute a cheaper or more easily available dibrominated benzene when costs fluctuate. Yet chemistry rarely rewards shortcuts. Swapping isomers or leaving out methyl groups often creates unexpected roadblocks: yields fall, purification steps balloon in complexity, or the final product’s properties drift off the required specification. My colleagues and I discovered, after lots of troubleshooting, that going back to the original methylated, para-dibromo product solved issues that had wasted weeks.

    Synthetic routes benefit directly from the geometry of the starting material. Other brominated benzenes lack symmetry, making it hard to achieve uniform substitution. The methyl groups at 2 and 5 positions help block unwanted side reactions, funneling reagents to the desired sites. It’s not just about chemistry textbook theory; it’s about fewer purification steps, better economies of scale, and faster troubleshooting in the plant. Swapping to more basic dibromobenzene is like changing a machine’s tolerances: the equipment may still run, but the finished part won’t quite fit.

    Regulatory and Environmental Factors: Emerging Concerns

    No discussion of modern chemicals is complete without considering regulatory and environmental realities. The world keeps a closer eye on brominated aromatics these days, especially due to their persistence in groundwater and their role in potential formation of hazardous byproducts during incineration. Regulators in North America, Europe, and East Asia expect companies to track and trace material flows more closely. While 1,4-Dibromo-2,5-Dimethylbenzene isn’t as problematic as larger brominated flame retardants or PCBs, it still deserves respect and careful control.

    I often consulted with environmental compliance officers tasked with documenting solvent and byproduct management from every batch. Documenting waste streams at the lab scale saves headaches down the road, ensuring installations meet local discharge limits and avoid expensive remediation orders. Companies that actively focus on reclamation and incineration standards guard themselves not just from regulatory surprise but also reduce liability—protecting both their business and their neighbors. 1,4-Dibromo-2,5-Dimethylbenzene’s stability means it doesn’t degrade quickly in the wild, so responsible stewardship and efficient closed-loop systems make ethical and business sense.

    Sourcing and Supply: Finding the Right Partner

    My experience has shown that sourcing decisions can make or break a production schedule. During one scale-up project, a delay in securing high-quality 1,4-Dibromo-2,5-Dimethylbenzene brought progress to a halt. Companies that stockpile generic raw materials sometimes find out—painfully—that isomer specificity and lot-to-lot reproducibility cannot be assumed.

    Trusted suppliers provide more than a drum or bag of chemicals. They offer clear batch documentation and transparent sourcing, often with traceability back to a single facility or lot. This helps downstream users, from startup labs to multinational conglomerates, know exactly what they’re getting. While price matters, the costs of lost time or inferior products usually outweigh small savings per kilo.

    Recently, digital supply chain management improved access and reliability, yet the expertise of a responsive supplier still makes a difference. I've worked with teams that built relationships with their vendors, leading to better access to technical support when things veered off script. That trust saves time on risk assessment, eliminates surprises during audits, and smooths out raw material inconsistencies that otherwise can derail expensive projects.

    Innovative Uses: From Design to Delivery

    As research looks for new frontiers, traditional chemicals sometimes step into the spotlight for modern applications. 1,4-Dibromo-2,5-Dimethylbenzene finds new life in materials chemistry, medicinal chemistry, and even nanotechnology. In some advanced organic synthesis projects, its structure forms the backbone for modular assembly, letting chemists control architecture at the nanoscale.

    Within semiconductors and photovoltaics, precision wins over improvisation. A molecule like this, symmetric and methylated, gives process engineers more control over both performance and consistency. It’s no accident that specialty chemicals firms invest in proprietary processes to ensure repeatability and purity at the parts per million level. Their investments ensure that each shipment, no matter the end use, meets the high expectations of an industry that can’t afford surprises.

    Why Technical Consultation Pays Off

    From the smallest bench scale to industrial multi-ton processes, advice and consultation remain as valuable as any piece of equipment. Over my career, seeing colleagues face crossroad decisions—opt for a new synthesis route, substitute starting materials, or tweak process conditions—made me value the role of experience as much as data sheets and literature reviews. Tough decisions rarely hinge just on price or stated purity; it’s the long-term impact on reliability and process robustness that matter.

    Workshops or ongoing consultations allow technical staff to learn from both success and error, helping close the gap between theoretical promise and production reality. One overlooked impurity can cause costly interruptions or litigation, so companies that foster exchanges between technical experts, production crews, and compliance teams enjoy faster progress and fewer headaches.

    Supporting Claims Through Data and Experience

    It’s important not to just rely on anecdotes when discussing a compound’s strengths. The literature documents uses and outcomes for 1,4-Dibromo-2,5-Dimethylbenzene across journals and patent filings, supporting its widespread adoption for advanced intermediates and specialty polymers. Data from reputable sources, such as the American Chemical Society and cited research articles, illustrate its use in facilitating efficient cross-coupling and step-growth polymerizations. Manufacturers reporting on pilot projects or commercial runs often mention fewer byproducts and higher yields compared with structurally similar, but less symmetric, dibromo aromatics.

    Having used it myself in academic and early-stage projects, I have firsthand knowledge of its reliable behavior and straightforward workups. These practical benefits aren’t always captured in brochures or websites. Colleagues across the industry report the same: starting with materials that remove guesswork pays off, especially as projects scale up to pilot or commercial production.

    Continuing Development: Looking Ahead

    Chemistry changes with new needs and technologies. While 1,4-Dibromo-2,5-Dimethylbenzene has served classic synthetic chemistry and modern materials science, attention continues to shift toward sustainability and green chemistry. New protocols demand improved recovery of starting materials, innovative solvent use, and tight control over emissions. Some researchers pursue catalytic recycling of brominated aromatics or direct in situ conversion, aiming to minimize waste. While these efforts won’t replace foundational molecules overnight, they drive gradual changes in how companies select and use chemical inputs.

    Staying informed and open to evolving best practices, not just for regulatory requirements but for operational improvement and community safety, remains paramount. In my view, those who adapt early—testing alternatives, investing in reclamation technologies, or redesigning processes—will find themselves ahead of competitors when new rules arrive or customer expectations shift.

    Practical Solutions: Addressing Challenges Head-On

    Anyone using specialty chemicals encounters challenges, from procurement headaches to disposing of waste streams. Over the years, I’ve seen companies benefit from investing in staff education—training chemists and plant managers alike on new reaction pathways, purification techniques, or safe handling standards. Sometimes the toughest problems have solutions hidden in published protocols, industry conferences, or technical partnerships.

    Another practical step involves building redundancy into critical supply chains. Each time a single-source supplier failed, downstream projects stalled. Collaborating with two or more suppliers, each vetted on quality and reliability, limits exposure to unexpected shortages. The era of just-in-time inventory can work for pens or paper, not always for crucial intermediates or reagents.

    Digital recordkeeping also provides value—tracking batches, certifying purity, and mapping usage over time streamlines both internal audit and external compliance obligations. As regulations tighten, firms that already monitor and optimize their material use will fare better, both legally and financially. The certainty that comes from good records can mean the difference between a solved dispute and a costly shutdown.

    Concluding Thoughts: Why This Compound Matters

    It’s easy to overlook the significance of a single chemical among thousands available. Still, 1,4-Dibromo-2,5-Dimethylbenzene earns its reputation through reliability, specificity, and versatility. Whether supporting routine synthesis, pioneering new materials, or meeting exacting electronic standards, this compound stands as more than just a line item on a requisition form.

    Navigating the world of specialty chemicals demands more than knowledge of melting points and solubility. It calls for experience, continuous learning, and a willingness to evaluate both time-tested tools and emerging alternatives. By paying attention to sourcing, purity, application, and responsible usage, professionals can keep their processes running smoothly and their innovations moving forward. 1,4-Dibromo-2,5-Dimethylbenzene, with its unique structure and solid track record, remains a prime example of why diving deep into the details pays off—not just in the lab, but throughout the supply chain and across industries.