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3,6-Dibromocarbazole

    • Product Name 3,6-Dibromocarbazole
    • Alias 3,6-Dibromo-9H-carbazole
    • Einecs 236-671-6
    • 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
    • CONTACT NOW
    VTB
    Specifications

    HS Code

    686896

    Cas Number 4861-84-1
    Molecular Formula C12H6Br2N2
    Molecular Weight 338.00 g/mol
    Appearance Off-white to light yellow powder
    Melting Point 232-236°C
    Boiling Point No data available (decomposes)
    Purity Typically ≥98%
    Solubility Insoluble in water, soluble in organic solvents
    Density No data available
    Synonyms 3,6-Dibromo-9H-carbazole
    Refractive Index No data available
    Storage Temperature Store at room temperature, protected from light

    As an accredited 3,6-Dibromocarbazole factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.

    Packing & Storage
    Packing 3,6-Dibromocarbazole, 25g, is sealed in an amber glass bottle, labeled with hazard symbols and product information for laboratory use.
    Shipping 3,6-Dibromocarbazole is typically shipped in tightly sealed, chemical-resistant containers to prevent moisture or contamination. The package is labeled according to regulatory guidelines, indicating hazardous material. It is transported in compliance with local and international shipping regulations for chemicals, ensuring safe handling and storage during transit to prevent spills or exposure.
    Storage 3,6-Dibromocarbazole should be stored in a tightly sealed container, kept in a cool, dry, and well-ventilated area away from sources of ignition, direct sunlight, and incompatible substances such as strong oxidizing agents. The storage area should be clearly labeled, and access should be restricted to trained personnel to prevent accidental exposure or misuse.
    Application of 3,6-Dibromocarbazole

    Applications of 3,6-Dibromocarbazole in Industrial Manufacturing

    As a direct manufacturer specialized in halogenated heterocyclic compounds, we supply 3,6-dibromocarbazole to global partners engaged in materials science, electronic chemicals, colorant precursors, and advanced polymer development. Our clients value the unique electron-rich aromatic structure and bromine sites, which enable specific molecular integration for performance materials. Below, we detail key application scenarios in downstream sectors where this raw material fulfills defined, verifiable roles in formulation and industrial processing chains.

    1. Organic Semiconductor Fabrication for OLED and OFET Devices

    Research institutes and display panel manufacturers rely on 3,6-dibromocarbazole as a functional intermediate in the synthesis of carbazole-based monomers and oligomers for use in organic electronics. Its dibromo substitution pattern allows for controlled cross-coupling reactions during molecule design for emitter or transporting layers. Process engineers coordinate this input with required purity levels and trace metal controls as specified by electronics-grade standards, in order to maintain consistent electrical properties in each device generation.

    Industry compliance standards

    • IEC 62341 (OLED panel material safety)
    • RoHS and REACH Annex XVII (halogenated materials in electronics)
    • ISO 9001:2015 (certified quality management systems for advanced materials)
    • TCL/TSL panel manufacturer product-specific acceptance criteria

    Typical usage ratio

    • 0.2%–1.5% by weight in carbazole monomer synthesis batch mixtures, adjustable according to targeted polymer chain length and device emission specifications

    Downstream process integration

    • Introduced in Stille, Suzuki, or Buchwald–Hartwig cross-coupling as a core scaffold for subsequent functionalization—this stage occurs after initial halide handling but prior to device layer casting or ink formulation

    Final product types

    • OLED display thin films, OFET active layers, light-emitting diode chips, solution-processable ink formulations for printed electronics

    2. High-Performance Dye and Pigment Intermediate Production

    Colorant manufacturers employ this dibromo-doped carbazole for building advanced pigment molecules, notably in the synthesis of violet and blue benzidine- or carbazole-based dyes for plastics, inks, and optical films. The well-defined bromide positions enable further electrophilic substitution steps, while ensuring chromophore stability during downstream high-temperature processing. Formulators leverage its reactivity to achieve desired solubility and color fastness properties, integrating QC checkpoints to meet batch reproducibility and regulatory testing protocols.

    Industry compliance standards

    • EN 71-3 (colorant safety in toys and consumer products)
    • ISO 105-A02 (color fastness of pigments)
    • ASTM D3722 (organic pigments for plastics)
    • REACH Annex XIV/XVII (hazardous aromatic amines restrictions)

    Typical usage ratio

    • Generally 0.8%–2.5% of total pigment synthesis batch mass, adjusted according to target chromophore structure and solid yield

    Downstream process integration

    • Dosed at the condensation or coupling stage as the core heterocycle, followed by further halogenation, alkylation, or sulfonation within pigment reactor trains

    Final product types

    • High-fastness violet/blue organic pigments, specialty inkjet colorants, fluorescent security inks, non-fading textile colorant concentrates

    3. Photoinitiator and UV-Absorber Intermediate Manufacturing

    Photochemical additive producers use 3,6-dibromocarbazole as a structural precursor for synthesizing UV absorbers and photoinitiators with enhanced photostability and defined absorption windows. The dual bromination facilitates controlled functional group attachment, forming molecules with tailored UV cutoff properties necessary for advanced coatings, adhesives, and optical films. Production runs require strict control of impurity profiles in alignment with customer photoinitiator purity requirements and regulatory phototoxicity thresholds.

    Industry compliance standards

    • ISO 21348 (definitions for UV filtering and measurement in materials)
    • REACH SVHC and ECHA registration dossiers (photoinitiator monomers)
    • FDA 21 CFR 175.300 (coating materials in food packaging—migration limits)
    • ISO 9001:2015 (quality control systems during intermediate processing)

    Typical usage ratio

    • 1%–3% by total mass in initial photoactive monomer synthesis, variable with desired UV absorption peak and final quantum yield

    Downstream process integration

    • Introduced at early synthetic steps for constructing carbazole-based chromophores, allowing subsequent alkylation, etherification, or polymerization in multipurpose reactors

    Final product types

    • UV-curable ink additives, light-stabilizer masterbatches, UV-blocking films for electronics, high-durability coatings for architectural glass

    4. Specialty Polymer and Advanced Material Building Block

    Innovation-driven polymer manufacturers use this compound to construct conjugated backbones for specialty polymers exhibiting high charge mobility, thermal resistance, or unique optical attributes. During scale-up, it serves as a rigid, planar aromatic core entering block copolymer or donor-acceptor conductive polymer syntheses. The precise dibromo groups allow chain extension and cross-linking where electrical or photonic performance depends on consistent molecular weight and purity, subject to supplier CoA and downstream GPC, NMR, and UV/VIS checks.

    Industry compliance standards

    • IEC 61249-2-21 (halogen content tests for electronic base materials)
    • REACH compliance (polymer intermediate registration)
    • ISO 14001 (environmental management in advanced material production)
    • UL 94 (flammability requirements for polymeric materials)

    Typical usage ratio

    • 0.5%–1.8% by polymer feedstock mass, tailored by desired repeat unit frequency and end-use device specification

    Downstream process integration

    • Reacted in the main monomer feed during polycondensation or Suzuki coupling polymerizations, followed by extrusion or film casting in line with process QC and solvent recovery stages

    Final product types

    • Electroluminescent device substrates, antistatic coatings, transparent conductive polymers, high-performance engineering plastics
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    Certification & Compliance
    More Introduction

    3,6-Dibromocarbazole: Material Insight from a Chemical Manufacturer

    Understanding the Essence of 3,6-Dibromocarbazole

    In the world of specialty chemicals, every molecule carries a backstory. 3,6-Dibromocarbazole has shown its merit over the years, not just in lab notebooks, but in the hands of those pushing boundaries in organic electronics and pigment synthesis. Digging back into our archives, it’s easy to remember the days when researchers stumbled through poorly refined intermediates. The leap to a consistent 3,6-Dibromocarbazole supply changed a lot of careers, and kept technical teams sleeping better at night.

    Our production lines focus on high-purity 3,6-Dibromocarbazole, and every batch reflects years of process refinement. As a manufacturer rooted in the details, we’ve learned that small shifts in bromination levels, or impurities drifting above trace, can slap project timelines off course. Nowhere is that more obvious than in the development labs for OLEDs, semiconducting polymers, or specialty dye industries. These industries don’t have time to question the chemical backbone of their prototypes. The reality is: the finer details of synthesis matter.

    Model and Specifications: Getting the Foundation Right

    The grade we commit to supplying matches a tight specification: 3,6-Dibromocarbazole with a purity over 99.0%, confirmed by high-performance liquid chromatography and corroborated by NMR spectra. Water content sits below 0.5% by KF titration. This level of control isn’t the kind of claim that looks impressive just on a product sheet—for end users with high-responsibility applications, the numbers are about making ambitious projects less risky.

    Physical form plays a role too. We manufacture both crystalline powder and tailored granules depending on the end application. Each form behaves differently when handled in the blending tanks or reactors of customers. For electronics customers, granules minimize static issues and dust generation. Dyes and pigment manufacturers often prefer the powder for more straightforward solubility profiles.

    Our plants run under continuous monitoring, ensuring batch-to-batch reproducibility, which has been the difference for scale-up projects absorbing millions of dollars. Our technical staff has direct relationships with production and QA to head off drift, and these lessons have helped customers avoid the sort of batch rejections that can derail a project or factory line.

    Practical Applications and Impact

    Those walking the shop floor or laying out process scale-ups see real context for 3,6-Dibromocarbazole far from textbook summaries. The structure of carbazole, two fused benzene rings and a nitrogen, opens a lot of doors for synthesis. The two bromine substituents on the 3 and 6 positions let it act as a flexible intermediate for coupling reactions and functionalizations.

    In organic electronics, especially OLEDs and advanced display technologies, the path towards new materials leans heavily on such intermediates. Teams developing next-generation semiconductors depend on 3,6-Dibromocarbazole to drive up charge mobility and optimize energy gaps in their architectures. Without tight control on purity, trace byproducts could undermine investor trust and device durability.

    On the pigment side, bridging aromatic systems with halogen atoms increases acid resistance, thermal stability, and end-product shelf life. Over decades, pigment manufacturers have watched the value of raw intermediates like 3,6-Dibromocarbazole rise as color consistency requirements have been pushed upwards by tighter regulations. Any drift in raw material specs spills into tank batches, resulting in unpredictable shade drift and client complaints.

    Synthetically, 3,6-Dibromocarbazole stands apart from many halogenated organics because it can be transformed through a wide array of cross-coupling reactions. Suzuki, Stille, or Ullmann reactions all find value in this scaffold, making it a frequent launch point for more complex architectures in research and production facilities.

    Bridging Differences: How 3,6-Dibromocarbazole Stacks Against Other Carbazoles

    Chemists tend to weigh every halogenated carbazole against its siblings, especially in scale-up work. Structurally, moving the bromine atoms around the carbazole ring gives wildly different outcomes in terms of both reactivity and optimal application. 3,6-Dibromocarbazole distinguishes itself most obviously against its 1,3-, 2,7-, or 1,8- counterparts by its streamlined functionalization. The 3 and 6 positions display high reactivity in substitution and coupling chemistry, often with fewer side products compared to less favorably oriented isomers.

    In practical terms, others can deliver more steric hindrance, or less selectivity during reactions. For customers working on low-defect optoelectronic films, such inconsistency in starting material can cause higher defect rates downstream—more troubleshooting, more lost production runs. This single change in bromination points affects solubility and, by extension, the choice of solvents in downstream processing: critical for industries trying to maximize throughput or minimize solvent handling issues.

    Purity also changes the perception. Some suppliers have tried pushing lower-purity grades of similar compounds for price advantage. What we’ve observed, and what end-users have often shared, is that the math rarely checks out over time. Once a plant hits an impasse with sub-par batches—yield loss, filtration headaches, or extra washing steps—the up-front savings quickly fade against reprocessing costs and extended downtime.

    Direct Experience in Production: Lessons and Insights

    Production and scale-up always put theory to the test. Running tens of kilograms, then hundreds, layers in lessons about packing, heat transfer, and containment you only experience after decades of hands-on work. 3,6-Dibromocarbazole offers a contrast to more finicky intermediates. Its crystalline habit, if synthesized correctly, lends itself to stable handling and efficient packing.

    One challenge relates to controlling the bromination reaction. The stepwise introduction of bromine must outpace formation of isomeric by-products. Our reactors use dynamic jackets and multi-point temperature measurement. Operators see how managing temperature spikes and micro-mixing can swing purity from 95% up to 99%.

    It’s also important to clear away elemental bromine residues after synthesis. Early on, analysis of final lots showed yellow-tinted batches or strong halogen odors. Not only would this threaten downstream product stability, but such residues made safe packaging and handling a risk. Today, every lot undergoes thorough purging under reduced pressure, and subsequent testing, before QA signoff.

    Waste handling can complicate the equation. Excess bromine, spent solvent, and off-gas management all stack up by the ton at scale. The plant cycles solvents through in-line treatment; bromine recoveries run in a closed loop, a process that takes serious capital investment but pays back in lower ongoing input costs, and a cleaner EHS audit.

    Supporting Research and Development

    Customers routinely approach our technical support team with specialized projects. Sometimes it’s for substituting 3,6-Dibromocarbazole directly into complex multistep synthesis routes. Other times, it’s about boosting efficiency for custom intermediates. Years of analytical experience show up in simple things: providing NMR profiles, giving practical recommendations for solvent selection, or identifying likely byproduct families before scale-up begins.

    Every year, published patents reference high-quality 3,6-Dibromocarbazole for new pharmaceuticals, advanced materials, and high-value pigments. Many synthetic chemists credit the availability of stable, high-grade intermediates for their success in hitting milestones.

    Research isn’t just about the molecules—collaborative development between our chemists and customer R&D units has led to process modifications that minimize bottlenecks, giving clients a competitive edge. One project involved adapting the material’s morphology for a continuous flow process, reducing energy inputs and boosting throughput without introducing new impurities. Another involved tuning the residual halogen profile, after customers flagged minor yield losses in their catalytic downstream chemistries—the tweaks cut those issues down, saving both time and waste.

    Raw Material Security and Supply Chain Stability

    Supply chain disruptions teach tough lessons. Over the last decade, shifts in regulations affecting bromine usage, local permit revisions, and even atmospheric emissions benchmarks have forced chemical companies to re-examine how they source, store, and move halogen-containing products like 3,6-Dibromocarbazole. Since brominated organic chemicals draw tighter regulatory attention, regular audits and risk mitigation practices matter as much as chemistry.

    Our teams work with trusted feedstock suppliers, and have implemented dual-layer lot control to catch any upstream drift in quality or contamination. During periods of market volatility—when bromine or carbazole feedstocks spike—having contractual relationships with regional extraction and synthesis partners has kept our lines running. This effort doesn’t just protect orders and project launches; it ensures technical teams can rely on an uninterrupted pipeline, critical for commercial scale ventures.

    A technical memorandum from a few years back showed aggregate rejection rates dropped by 60% once raw material traceability improved. Downstream clients, especially in electronics, appreciated not needing to constantly validate incoming lots from batch to batch. For long-term collaborations, this stability fosters trust and deeper innovation.

    Environmental Responsibility and Regulatory Insight

    As manufacturers dealing directly with halogenated intermediates, we operate under measured scrutiny from both internal and external EHS teams. Hazard reduction doesn’t just start at final shipping; it runs right back to drum delivery and on to plant effluent controls.

    Processes for 3,6-Dibromocarbazole employ contained bromination, followed by robust solvent recovery and aftertreatment. The effluents run through monitored neutralization and secondary scrubbing before any downstream discharge. This keeps us aligned with both international and local requirements, reducing persistent organic pollutants and minimizing overall bromine outflow.

    Over recent years, our plants have achieved ISO and local EHS certifications on the back of these practices. Technical improvements didn’t come from top-down mandates but from close feedback loops among operators—process improvements, small line extensions, tweaks in QA sample processing. Such efforts shave critical points off workplace exposure for shift teams, and keep communities protected from stray emissions.

    Customers working under expanding regulatory frameworks, particularly in North America and Europe, routinely audit our supply practices. Their compliance teams look for cradle-to-gate LCAs, hazardous waste logs, and clear recovery rates from all inputs. These demands move far beyond standard CoAs, and have required ongoing investment in plant automation and data reporting. Open lines with regulators, immediate documentation, and real-time trace history provide not just peace of mind, but robust grounds for product adoption at higher volume.

    Market Trends and Shifting Demands

    The market for 3,6-Dibromocarbazole aligns closely with demand surges in organic electronics and downstream colorants. As interest in flexible display technology grows, the requirements for consistency and material fitness only get tighter. Downward price pressure from competing chemistries means producers have to stay sharp—cheaper alternatives abound, but at the cost of reliability or performance.

    Research teams keep knocking on the door for purer lots, finer granulations, and faster shipment cycles, especially with shrinking product development timelines. Rather than chase every competitor’s move, experience teaches that deeper engagement with lead users yields bigger dividends. They provide the hardest feedback, driving faster shifts in quality assurance and distribution logistics.

    Shifts towards greener chemistry, tighter impurity control, and measurable carbon footprints have pushed the entire sector to overhaul old synthesis and waste protocols. The race is no longer just about purity—it’s about offering a reliable supply chain with minimal regulatory and environmental overhead. Teams handling 3,6-Dibromocarbazole have to keep a pulse not just on R&D trends, but also on the shifting sands of regulatory priorities, waste handling, and market price stability.

    Going Beyond the Molecule: Supporting Customer Success

    Our direct involvement in customer projects lands us in the details that rarely surface in product guides. An electronics customer once shared how a failed pilot run using lower-quality material spiraled into weeks of lost development time. The reversal started with a frank technical exchange, in which production notes, impurity spectra, and synthesis variables were all put on the table. Switching to a more controlled 3,6-Dibromocarbazole stream, yields rebounded, and the client’s project leader convinced the executive team to double down on commercialization.

    Such collaborative troubleshooting drives customer loyalty because it stays grounded. Supporting calls from plant operators or walking through deviation reports gives manufacturers a firsthand look at industry pain points. Process changes, whether it’s adjusting the drying profile to manage powder flow or reassessing packaging to reduce handling hazards, have grown from these discussions.

    For R&D labs and manufacturers alike, the end game remains the same: reliable chemistry, documented control, and technical support that goes deeper than boilerplate. Those values earned us a seat at the table for critical path projects, patents, and production launches around the world. 3,6-Dibromocarbazole remains a hallmark of collaborative advancement—and a tangible reflection of what happens when chemical manufacturing puts technical rigor above expedience.