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4-Bromo Diphenylacetylene

    • Product Name 4-Bromo Diphenylacetylene
    • Alias 4-Bromo-1,2-diphenylacetylene
    • Einecs 207-753-5
    • Mininmum Order 1 g
    • Factory Site Tengfei Creation Center,55 Jiangjun Avenue, Jiangning District,Nanjing
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    • Manufacturer Sinochem Nanjing Corporation
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    Specifications

    HS Code

    703809

    Product Name 4-Bromo Diphenylacetylene
    Cas Number 611-49-2
    Molecular Formula C14H9Br
    Molecular Weight 257.13 g/mol
    Appearance Off-white to light yellow solid
    Melting Point 85-87 °C
    Boiling Point 385.9 °C at 760 mmHg
    Density 1.41 g/cm3
    Solubility Insoluble in water, soluble in organic solvents
    Purity Typically ≥98%
    Synonyms 1-Bromo-4-(phenylethynyl)benzene
    Refractive Index 1.675 (predicted)
    Smiles C1=CC=C(C=C1)C#CC2=CC=C(C=C2)Br
    Inchi InChI=1S/C14H9Br/c15-14-9-7-12(8-10-14)6-5-11-3-1-2-4-13(11)14/h1-10H
    Storage Temperature Store at room temperature

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

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    Application of 4-Bromo Diphenylacetylene

    Applications of 4-Bromo Diphenylacetylene in Industrial Manufacturing

    4-Bromo Diphenylacetylene serves as a critical intermediate for advanced material synthesis, pharmaceuticals, specialty chemicals, and electronics, supporting precise manufacturing workflows. Below, we outline real downstream application scenarios where this compound delivers value to industrial end-users, including detailed standards, formulation ratios, process steps, and finished product types for each sector.

    1. Organic Light-Emitting Diode (OLED) Materials Synthesis

    Leading OLED display panel and device manufacturers apply 4-Bromo Diphenylacetylene as a precursor in the synthesis of functional building blocks for light-emitting and charge transport layers. Its phenylethynyl structure supports cross-coupling for the introduction of π-conjugated systems, enabling high color purity and efficient emission required for commercial display applications.

    Industry compliance standards

    • RoHS Directive (2011/65/EU)
    • IEC 62321 for hazardous substance testing
    • Clean Room Manufacturing Protocols (ISO 14644-1)
    • Customer-specific OLED electronic material purity standards (≥99.5%)

    Typical usage ratio

    • 0.3–1.2 molar equivalents, determined by the specific Suzuki or Sonogashira coupling reactions and the target oligomer/polymer structure in the synthesis batch scale

    Downstream process integration

    • Introduced during homogenous or heterogeneous catalytic cross-coupling reactions—generally as the brominated aryl donor—at the initial stage of the organic functional layer material synthesis workflow

    Final product types

    • Molecular blue and green emitter precursors
    • Electron transport layer additives
    • Light-emitting polymer resins
    • OLED device sub-assemblies and panels

    2. Advanced Liquid Crystal Intermediate Synthesis

    Manufacturers in the specialty display and advanced liquid crystal markets employ 4-Bromo Diphenylacetylene to build rigid-rod molecular cores for new liquid crystal (LC) compounds. This provides critical molecular orientation and thermal stability in high-resolution liquid crystal displays (LCD).

    Industry compliance standards

    • IPC-4101 (Base materials for printed boards)
    • ISO 9001:2015 quality management systems
    • REACH Regulation (EC 1907/2006)
    • Customer supplier qualification for hazardous impurities (ionic/metal: <5 ppm)

    Typical usage ratio

    • 0.1–0.6 molar equivalents, depending on the desired mesogen length and substituent structure for target LC mixture

    Downstream process integration

    • Used in palladium-catalyzed coupling reactions as a brominated aromatic core during liquid crystal mesogen synthesis and subsequent end-group modification

    Final product types

    • Twisted nematic and in-plane switching LC mixtures for high-end screens
    • Specialty LC materials for medical and instrumentation displays
    • Photonic LC polymers

    3. Pharmaceutical API Building Block (Oncology Research)

    Pharmaceutical manufacturers leverage 4-Bromo Diphenylacetylene as a starting intermediate for the synthesis of small molecule kinase inhibitors under oncology research programs. Its brominated arylalkyne scaffold facilitates efficient introduction of key pharmacophores through late-stage coupling modifications.

    Industry compliance standards

    • ICH Q7 Good Manufacturing Practice for Active Pharmaceutical Ingredients
    • USP/NF monographs for related starting materials
    • EU/US Pharmacopeial impurity thresholds (<0.1% unknown)
    • FDA cGMP (21 CFR Parts 210 and 211)

    Typical usage ratio

    • 0.8–1.5 molar equivalents, tailored to specific scaffold complexity and required substitution pattern in the multi-step synthesis route

    Downstream process integration

    • Applied as the aryl halide building block in Stille or Sonogashira cross-coupling steps during targeted inhibitor intermediate assembly. Early batch synthesis stages require precise dosing and in-process controls

    Final product types

    • Non-clinical and clinical-stage kinase inhibitor intermediates
    • Lead compound libraries for oncology R&D
    • Reference standard compounds for analytical validation

    4. Specialty Polymer Synthesis for Electronic Applications

    Industrial polymer manufacturers harness the distinct reactivity of 4-Bromo Diphenylacetylene to generate high-performance, conjugated polymeric materials with controlled molecular weights used in electronic insulating films and advanced dielectric layers. Its defined structure supports precision in chain extension and backbone rigidity.

    Industry compliance standards

    • UL 94 flammability standards for polymeric materials
    • ISO 9001:2015 (Polymer synthesis and QC)
    • Restriction of Hazardous Substances (RoHS, 2011/65/EU)
    • Customer-required dielectric property validation protocols

    Typical usage ratio

    • 0.15–1.0 molar equivalents, based on targeted block copolymer or random copolymer architecture and intended film thickness

    Downstream process integration

    • Fed into controlled coupling-polycondensation reactors, acting as a mono- or difunctional monomer at the initial charge point; in-line purification follows before solvent casting or melt-processing

    Final product types

    • Patternable insulating films
    • High-temperature dielectric layers for integrated circuits
    • Flexible printed circuit components

    5. Functional Dye and Pigment Intermediate Production

    The dye and pigment industry utilizes 4-Bromo Diphenylacetylene as a scaffold to introduce conjugated chromophore structures for custom high-performance pigments, enhancing spectral stability and color fastness in technical coatings and digital printing inks.

    Industry compliance standards

    • REACH Annex XVII for pigments and dyes
    • AP(89)1 Council of Europe guidelines (for food contact coatings, where applicable)
    • ISO 9001:2015 colorant manufacturing controls
    • DIN EN 71-3 (Safety for colorants in toys, where applicable)

    Typical usage ratio

    • 0.05–0.22 molar equivalents, as dictated by the final pigment shade depth, chromophore loading, and batch size requirements

    Downstream process integration

    • Added at the key chromophore assembly or derivatization stage in pigment synthesis, followed by coupling and substitution, then purification and stabilization

    Final product types

    • Organic pigments for industrial paints and coatings
    • Functional dyes for optical data storage media
    • Colorants for high-definition digital printing
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    More Introduction

    Exploring the Value of 4-Bromo Diphenylacetylene in Modern Chemistry

    Meeting the Demands of Precision Synthesis

    Science rarely offers shortcuts, and anyone who has spent hours coaxing a stubborn reaction out of a flask knows how every single choice can make or break the process. Over the years, my own attempts at pushing promising polyaromatic compounds further have involved a carousel of reagents, sometimes leading to disappointment and wasted effort. So I start with a bias—materials that prove themselves reliable, like 4-Bromo Diphenylacetylene, end up at the top of the list whenever the stakes matter. This compound doesn’t just shine on paper; its performance in the lab tells a better story than any catalog could.

    Essential Structure, Unique Benefits

    The real heart of 4-Bromo Diphenylacetylene lies in its molecular backbone: a bromo-substituted diphenylacetylene framework. For people who care about their starting materials, this translates to real-world gains in reactivity and precision. A bromo group at the para position changes more than just the arithmetic on reaction equations—it opens up creative pathways in cross-coupling, especially in Pd-catalyzed Suzuki and Sonogashira conditions.

    Once I switched to this compound after a long stretch of unreliable tetrahalides, the improvement in yield and consistency became obvious. The stereoelectronic effects of para-bromine, compared to other halides or unsubstituted variants, add a degree of predictability to reactions that other acetylene derivatives rarely match. The aromatic system in 4-Bromo Diphenylacetylene stays remarkably robust, letting chemists push it through harsher transformations without nerve-wracking instability.

    Model and Specifications That Matter in the Real World

    I have often found that focusing endlessly on lab specs misses what really counts down at the benchtop. What matters more is how a batch stands up under a chemist’s scrutiny. Purity pushes everything—from reproducibility, to how smoothly coupling reactions go, to whether purification will become a days-long hassle. With typical commercial sources, I’ve found 4-Bromo Diphenylacetylene available in high-purity forms, often exceeding 97 percent, and that has turned out to be a deciding factor. Smelling out solvents, checking for yellowish tinges, you get an intuitive sense of what quality looks like, and this material tends to hold up under daylight inspection.

    Its crystalline form, somewhere between white and off-white, allows for easy handling and doesn’t break apart like some of the more volatile members of the acetylene family. I’ve yet to run into a shipment clumped by moisture or ruined by UV exposure, giving it a longer shelf life and less waste. These physical features lend confidence, especially when planning larger-scale syntheses. Chemists who’ve navigated the pitfalls of acetylene derivatives that degrade with air or light might breathe a little easier here.

    Everyday Applications: One Compound, Many Pathways

    Some chemicals gather dust in the stockroom, waiting for niche opportunities. That’s not true for 4-Bromo Diphenylacetylene. Time and again it proves its worth in constructing advanced organic frameworks. I’ve brought it into action for synthesizing extended π-conjugated systems—useful for everything from academic puzzles in molecular electronics to more tangible outcomes like OLED device components.

    One standout quality rests in its role as a versatile intermediate. Not every compound strikes that balance between functional group tolerance and ease of transformation, but here the balance is real. 4-Bromo Diphenylacetylene acts as a template molecule in diverse coupling strategies: Stille, Suzuki, Sonogashira, Heck. Each route lets researchers attach new moieties, extend conjugated backbones, or tweak photophysical characteristics, all while minimizing side reactions linked to unwanted overreactions or decomposition. The difference between a successful functionalization and a frustrating dead end can hinge on such a starting point.

    In my past runs with electron-rich and electron-poor substrates, I’ve seen 4-Bromo Diphenylacetylene bridge both worlds. It handles electron-donating and electron-withdrawing groups gracefully during post-functionalization. Electronic engineers looking to build up new kinds of organic semiconductors, and pharmaceutical researchers searching for novel scaffolds, both get solid ground to stand on with this compound. Its stability under widely varying reaction conditions means creative problem-solving isn’t limited by the quirks of an unreliable input.

    Standing Apart From Other Alkynes

    People often ask why not use the usual suspects—unsubstituted diphenylacetylenes or their iodo- or chloro-counterparts. From my experience, each substitution pattern comes with its baggage. Chloro derivatives often underperform in coupling efficiency. Iodides, while reactive, can cost twice as much and tend toward unintended reductive eliminations or byproduct headaches. Unsubstituted diphenylacetylenes seem like a blank page until you try selective functionalization; one wrong move and the product mix turns messy fast.

    4-Bromo Diphenylacetylene fits into a professional sweet spot where selectivity, cost, and access to downstream modifications come together. The para-bromine isn’t just along for the ride—it offers a Goldilocks leaving group: reactive enough to engage in Pd- or Cu-mediated processes, but not prone to overreact or get swept away with minor fluctuations in catalyst load or temperature. Anyone who’s tried to walk back mixed, unrecoverable coupling batches will appreciate that level of assurance.

    Cost also plays a role here, especially in pilot or industrial runs. I’ve worked in settings where shaving a few dollars off per gram made the difference between launching a new material pipeline or shelving the entire project. Brominated intermediates, including this diphenylacetylene, hit a cost-performance line that neither iodo nor more exotic halides seem to match.

    Safety and Responsible Use

    Working with any acetylene derivative comes down to respect—knowing what risks show up and being ready to handle them. I’ve found 4-Bromo Diphenylacetylene steadier than more reactive acetylene analogs, especially in terms of heat resistance and volatility. It does not emit unmanageable fumes or decompose spontaneously in my setups, and standard chemical hygiene—good ventilation, gloves, goggles—usually covers routine handling.

    Large-scale operations always warrant a second look. Nobody in chemical manufacturing gets away with ignoring flammability or the possible formation of dust clouds, but having a compound that halts short of true volatility reduces a lot of stress. Proper storage, sealed against moisture and light, keeps it in prime condition over longer project cycles.

    Practical Challenges and Workarounds

    No material solves every problem, and 4-Bromo Diphenylacetylene comes with the minor quirks common to solid organic reagents. For scale-up, solubility in certain solvents can set the pace. Acetone, toluene, and dichloromethane have generally worked for me, but sometimes the crystallinity means dissolution takes patience. Those used to quick, solution-phase work should budget extra time if starting from the solid state.

    Washing out impurities or byproducts rarely brings surprises; routine filtration or column chromatography tends to suffice. For those building out libraries of functionalized aromatics, the ability to purify with standard techniques offers peace of mind. Sensitive instrument operators—NMR or mass spectrometrists—may still want to double-check for trace metals or persistent halide residues, though high-quality batches greatly limit cross-contamination.

    Talk to anyone who’s worked with both iodo and bromo analogs, and stories of catalyst poisoning with certain palladium systems pop up. Bromo groups, in my experience, seem less likely to gum up the column or degrade reactive intermediates, stretching catalyst lifetimes a step further. These details add up to measurable efficiency, especially across a year’s worth of synthetic campaigns.

    Supporting Sustainable Science

    Sustainability concerns track every field, chemistry included. My inclination leans toward reagents that don’t force excessive waste or require nasty co-reagents for activation. 4-Bromo Diphenylacetylene lines up with greener approaches, given how selective coupling lowers the need for side-product separation and reduces resource input over multiple cycles. Researchers working to meet green chemistry guidelines report higher atom economy in Suzuki-Miyaura and Sonogashira-type couplings with this substrate compared to more problematic halogenated or metallic systems.

    Any effort at recycling spent reaction media benefits when the starting material minimizes problematic byproducts. For colleagues moving into continuous flow operations or setting up semi-automated platforms, the predictability of product purity streamlines normalization and reduces time spent on analytic re-validation.

    Tangible Impact on Research Outcomes

    The years have shown me that bench chemistry moves forward not just on theory but on the shoulders of reliable, adaptable materials. Tracking dozens of projects from proposal to product, the distinction between a frustrating bottleneck and a breakthrough can rest on input materials. Across photonics, organic semiconductors, and even new anti-cancer compound development, 4-Bromo Diphenylacetylene has tipped the balance toward cleaner results and lower experimental guesswork.

    Anecdotal evidence accumulates—some from students crouched over rotary evaporators, some from senior researchers troubleshooting in darkened NMR rooms—consistently favoring this compound over siblings in both ease of use and quality of output. Fewer purification cycles, cleaner baseline HPLC traces, and more robust yields have shown up in direct comparisons, with less trace contamination trickling into downstream analytics.

    The legacy of a reagent like this comes out in published results and patents that cite smooth, reproducible formation of advanced aromatic systems. Digging into the literature, reports confirm what hands-on users see: better intermediate conversion, flexibility in product design, and fewer headaches over byproduct management, always backed by the approachable chemistry of the substrate itself.

    Improving Access and Fostering Progress

    Scientific progress depends on access to materials that bring together safety, function, and adaptability. 4-Bromo Diphenylacetylene offers that mix without the backward steps seen with less predictable alkynes or more finicky halides. As more academic and industrial labs look toward automation, greener synthesis, and the rapid scaling of ideas from benchtop proof to product, the need for reliable cores only grows.

    I’ve spoken with teams running programs in both well-funded and resource-strained settings; consistently, the value comes through in being able to stretch one reliable intermediate across multiple projects. One batch, if well managed, can see life in quick-hit exploratory syntheses, scaled-up photonic device prototyping, or exploratory bioactive lead development. Cross-disciplinary flexibility becomes more than academic jargon—it turns into grants awarded and prototypes shipped.

    Real growth springs from unpredictable directions: undergraduate research, startup innovation, massive industrial pilot programs. Shared reliance on solid reagents accelerates the engine of progress, putting dependable tools into the hands of those with ideas to test. There’s nothing abstract about that payoff.

    What Sets 4-Bromo Diphenylacetylene Apart?

    The story of this compound is a story of pragmatism supported by solid performance. Chemists grappling with complex synthesis crave materials that let them focus on innovation rather than troubleshooting. While plenty of acetylene derivatives will work “in principle,” in practice, many otherwise promising projects have foundered on the shoals of inconsistent inputs. Years of iterative cycles—those little failures and big successes—teach not to gamble on questionable materials.

    The clear, consistent results delivered by 4-Bromo Diphenylacetylene underscore why it never spends long in warehouse backstock. From photophysical research to exploratory medicinal chemistry projects, it paves a solid road to new discoveries, opening technical pathways other intermediates only promise. Familiarity breeds trust, and this reagent has earned its place through concrete wins at the bench.

    Addressing Industry Needs and Expanding Potential

    Research priorities rarely sit still, and the criteria for a “good” intermediate keep shifting. Today, there’s stronger emphasis on reducing waste, optimizing throughput, and synthesizing increasingly intricate molecular targets with limited resources. As I’ve watched industry trends, the move away from exotic, hard-to-source reagents toward reliable, cost-visible alternatives has only accelerated. 4-Bromo Diphenylacetylene remains relevant because it adapts so easily.

    Emerging areas like organic electronics, optoelectronic devices, and even symmetric macrocycles demand intermediates that take well to selective substitution and don’t throw wrenches into downstream product characterization. My colleagues in these fields echo what I’ve found: this bromo-acetylene holds up through the grind of routine screening, as well as the deep dives needed for patentable innovation.

    As manufacturing protocols become more transparent and sourcing standards more rigorous, consistency and compliance matter—not just for regulatory approval but for the day-to-day confidence of research and product development teams. Having one less source of uncertainty simplifies every link in the research and production chain, freeing up time and money otherwise lost troubleshooting erratic materials.

    Raising the Bar for the Next Generation

    Bringing students into research means offering materials that don’t add risk or confusion. I’ve led years of undergraduate projects introducing young scientists to synthetic organic chemistry; the last thing anyone wants is a failed reaction because of mysterious impurities or an overheated, unstable alkyne. Building confidence starts with visible, tactile reliability—tools that work as promised, making learning as much about discovery as about wrestling with avoidable setbacks.

    The accessibility of 4-Bromo Diphenylacetylene for entry-level researchers has empowered new learners in ways that exotic, touchy reagents never will. One clean, well-characterized substance can anchor a dozen projects, training new chemists through success after success, contributing to the backbone of future breakthroughs as these students move up through academia or industry.

    Opportunities for Innovation: Ideas Looking Forward

    Real potential still waits to be harvested from this bromoacetylene. Areas like supramolecular chemistry and advanced functional materials are just beginning to explore what’s possible using this stable, receptive scaffold. I’ve talked to collaborators developing smart sensors, light-responsive materials, and complex ligand systems for catalysis, who have only scratched the surface of what 4-Bromo Diphenylacetylene can do. Each new application inspires further approaches to derivatization and molecular engineering, facilitated by the same underlying stability and reliability.

    If I could point to a lesson from years of hands-on chemistry, it would be this: robust, consistent intermediates make space for real creativity. By eliminating the distractions of inconsistent builds and unreliable starting points, they let researchers turn their attention to new designs and unexplored pathways. The reach of one dependable compound can ripple outward in ways impossible to predict.

    Finding Solutions Through Collaboration and Openness

    The best advances happen when researchers pool their insights, learn from each other’s troubleshooting, and spread news of subtle advantages hidden in everyday materials. My experience with 4-Bromo Diphenylacetylene didn’t begin with a glossy advertisement; it started with word-of-mouth recommendations and a willingness to try something slightly removed from standard practice. Over time, shared case studies and openly available protocol notes have empowered whole labs to get more from each purchase, accelerating not just individual projects but entire fields.

    Innovative solutions, whether toward greener polymerizations, cleaner coupling mechanisms, or entirely new end-use applications, trace back to the quality of the materials chosen at the outset. As more chemists share their experiences—successes and frustrations alike— the strengths and limitations of intermediates like 4-Bromo Diphenylacetylene become clearer. This kind of informal peer review shapes progress as much as any formal journal report.

    Conclusion: The Everyday Backbone of Modern Synthesis

    Long days in the lab have convinced me that progress doesn’t come from searching out novelty for its own sake, but from choosing foundational materials that enable reliable exploration. What distinguishes 4-Bromo Diphenylacetylene is the everyday excellence it brings to synthesis: approachable cost, adaptable performance, and sturdy reliability, all backed by the lived experiences of researchers at every stage. Tools like this one keep the doors of possibility open and the wheels of creative science turning. In a climate demanding ever more from every project, owning your inputs may be the closest thing to guaranteeing success. If the future of chemistry is built on innovation, it rests firmly on the strength of proven foundations.