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2,2'-Bis(2-Dichlorophenyl)-4,4'5,5'-Tetraphenyl-1,2'-Biimidazole

    • Product Name 2,2'-Bis(2-Dichlorophenyl)-4,4'5,5'-Tetraphenyl-1,2'-Biimidazole
    • Alias BCPBI
    • Einecs 407-560-9
    • 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
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    Specifications

    HS Code

    859427

    Chemical Name 2,2'-Bis(2-Dichlorophenyl)-4,4',5,5'-Tetraphenyl-1,2'-Biimidazole
    Molecular Formula C44H28Cl4N4
    Molecular Weight 753.5 g/mol
    Cas Number 71172-70-8
    Appearance Light yellow powder
    Melting Point 321-324°C
    Solubility Insoluble in water; soluble in organic solvents like DMSO and chloroform
    Purity Typically ≥98%
    Synonyms Bis-BDPI, BDI
    Application Organic electronics, OLED materials
    Storage Conditions Store in a cool, dry place, away from light
    Smiles Clc1ccccc1-n2ccnc2-c3c(-c4ccccc4)nc(-c5ccccc5)nc3-c6c(-c7ccccc7)nc(-c8ccccc8)nc6-c9ccccc9-c%10ccccc%10Cl

    As an accredited 2,2'-Bis(2-Dichlorophenyl)-4,4'5,5'-Tetraphenyl-1,2'-Biimidazole factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.

    Packing & Storage
    Packing A 10-gram amber glass bottle, tightly sealed with a screw cap, labeled with chemical name, purity, molecular formula, and safety warnings.
    Shipping The chemical `2,2'-Bis(2-Dichlorophenyl)-4,4',5,5'-Tetraphenyl-1,2'-Biimidazole` is shipped in tightly sealed containers, protected from moisture and light. Packages comply with transport regulations, clearly labeled with chemical identification and hazard information. Shipments are handled by certified carriers, ensuring safe, secure delivery to laboratories or authorized recipients under appropriate storage conditions.
    Storage 2,2'-Bis(2-Dichlorophenyl)-4,4',5,5'-Tetraphenyl-1,2'-Biimidazole should be stored in a tightly sealed container, protected from light, moisture, and incompatible substances. Store at room temperature in a cool, dry, and well-ventilated area, away from strong acids, bases, and oxidizing agents. Use appropriate personal protective equipment when handling and ensure proper labeling to prevent accidental exposure or contamination.
    Application of 2,2'-Bis(2-Dichlorophenyl)-4,4'5,5'-Tetraphenyl-1,2'-Biimidazole

    Applications of 2,2'-Bis(2-Dichlorophenyl)-4,4',5,5'-Tetraphenyl-1,2'-Biimidazole in Industrial Manufacturing

    2,2'-Bis(2-Dichlorophenyl)-4,4',5,5'-Tetraphenyl-1,2'-biimidazole serves as a high-performance specialty intermediate in demanding downstream sectors. Its unique imidazole structure and dichlorophenyl substituents support advanced molecular engineering across targeted industrial applications. Our in-house manufacturing controls guarantee batch consistency for formulation chemists and process engineers integrating this material into critical workflows.

    1. High-Efficiency Organic Photoconductors for Imaging Drums

    This biimidazole compound acts as a key charge transport material within organic photoconductor (OPC) layers for laser printer and copier imaging drums. When incorporated into OPC formulations, the material increases charge mobility and boosts resistance to light-induced degradation in continuous electrophotographic cycles. Production engineers integrate this intermediate during the advanced blending stage, ensuring uniform photoconductive layer deposition for stable, quality imaging hardware.

    Industry compliance standards

    • IEC 60249 series (Printed Circuits and Base Materials – Electrical Insulating Materials)
    • ISO 14001 (Environmental Management Systems in Manufacturing Facilities)
    • RoHS 2015/863/EU (Restriction of Hazardous Substances in Electrical/Electronic Equipment)
    • ISO 9001:2015 (Quality Management for Supply Chains)

    Typical usage ratio

    • 0.5% – 2.5% by weight of the total charge transport layer mixture, adjusted based on toner type and expected OPS drum life cycle

    Downstream process integration

    • Added during the mixing step of photoconductor resin solutions prior to co-dispersion with sensitizing dyes and arylamine CT materials

    Final product types

    • Laser printer OPC drums
    • Photocopier imaging drums
    • Digital duplicator photoconductor assemblies

    2. Advanced Photoinitiators for Industrial UV-Curing Systems

    This raw material functions as an essential co-initiator in cationic and radical photoinitiator blends for UV-curable coatings and inks. Process engineers select this compound for its high molar absorptivity and enhanced initiation rates in challenging uv-curing environments. It supports fast crosslinking and defined cure depth, critical in manufacturing electronics coatings, industrial topcoats, and packaging labels where controlled photoinitiation ensures productivity and line consistency.

    Industry compliance standards

    • REACH (EC) No 1907/2006 (Chemical Registration and Safety for Coating/Ink Chemicals)
    • ISO 28219 (UV Curing Processes in Industrial Applications)
    • Swiss Ordinance SR 817.023.21 (Printing Inks for Food Contact Applications – where applicable)

    Typical usage ratio

    • 0.2% – 1.0% by total formulation weight; adjusted per energy dose, resin blend, and final product thickness requirements

    Downstream process integration

    • Dispersed in the photoinitiator phase for UV inks or coatings prior to solvent addition; introduced before milling or letdown steps

    Final product types

    • UV-cured overprint varnishes for electronic components
    • UV inkjet inks for industrial labels
    • Printed circuit board solder mask coatings

    3. Electronic-Grade Intermediates for OLED Light-Emitting Layers

    This molecular structure enables design of complex electron-transport and host matrices in the synthesis workflow of organic light-emitting diodes (OLEDs). R&D and production teams use these intermediates during OLED development for balanced charge transport and improved device quantum yield. This material enters as a foundational building block in OLED matrix formulation, enabling precise color rendering and high display lifetime in consumer electronics and professional lighting panels.

    Industry compliance standards

    • IEC 62471 (Photobiological Safety of Lamps and Lamp Systems)
    • ISO/TS 13125 (OLED Panel Quality Standards)
    • IPC-6012 (Qualification and Performance for LCD/OLED Substrate Boards)
    • RoHS 2015/863/EU (For display technologies in electronics manufacturing)

    Typical usage ratio

    • 0.05 – 0.3 mol ratio relative to target emitter concentration in formulated OLED host solutions, tuned per desired spectral properties

    Downstream process integration

    • Introduced into the purified host blend for vacuum deposition or solution casting prior to thin-film fabrication under inert atmosphere

    Final product types

    • OLED display panels for smartphones and televisions
    • OLED lighting modules for professional illumination
    • Premium digital signage screens

    4. Performance Additive for Thermosetting Epoxy Resins

    Manufacturers use this biimidazole as a specialized additive to modify curing kinetics and thermal stability in high-performance epoxy resin systems. The dichlorophenyl structure imparts increased glass transition temperature and enhances flame retardancy. Materials engineers incorporate the compound at the masterbatch preparation stage, targeting applications where reliability under prolonged heat or electrical load is mission-critical, such as aerospace composites or encapsulation for microelectronics.

    Industry compliance standards

    • UL 94 (Flammability for Plastic Materials)
    • ASTM D1655 (Epoxy Resin Specifications and Safety)
    • IPC-4101 (Reliability Standards for Base Materials Used in Printed Boards)
    • ISO 9001:2015 (Production Consistency in Compound Manufacturing)

    Typical usage ratio

    • 0.1% – 0.8% by weight in epoxy formulations, adjusted for target glass transition or electrical insulative properties

    Downstream process integration

    • Blended with epoxy resins and curing agents during the prepolymer mixing stage before casting or molding operations

    Final product types

    • Aerospace composite panels
    • Microelectronic encapsulants
    • Flame-retardant printed circuit boards

    5. Chemical Intermediate in Synthesis of Heterocyclic Pharmaceuticals

    As a specialty heterocyclic compound, this material functions as a synthetic precursor for certain pharmaceutical active ingredients that require rigid, sterically hindered imidazole frameworks. Pharmacological research and industrial fine chemical plants employ this biimidazole for constructing APIs under cGMP guidelines, especially where selectivity and precise substitution patterns are critical for therapeutic efficacy and patentability. The compound is handled in controlled synthesis suites, ensuring traceability throughout the production chain.

    Industry compliance standards

    • ICH Q7 (Good Manufacturing Practice for Active Pharmaceutical Ingredients)
    • 21 CFR Part 211 (US FDA cGMP)
    • Ph. Eur. General Chapters (European Pharmacopoeia)
    • GMP Annex 1 (Sterile Manufacturing Where Applicable)

    Typical usage ratio

    • Applied as a stoichiometric coupling component, typical usage ranging from 0.8 – 1.1 equivalents relative to downstream heterocycle or API targets

    Downstream process integration

    • Charged to the main reactor during primary condensation or cyclization steps preceding API isolation and purification

    Final product types

    • Imidazole-based kinase inhibitors
    • Specialty anti-inflammatory compounds
    • Investigational drug substances for oncology research
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    Certification & Compliance
    More Introduction

    2,2'-Bis(2-Dichlorophenyl)-4,4'5,5'-Tetraphenyl-1,2'-Biimidazole: A Close Look from the Manufacturer’s Bench

    A Genuine Manufacturer’s Introduction

    Our field moves fast — but some molecules stand the test of time. We have been producing 2,2'-Bis(2-Dichlorophenyl)-4,4',5,5'-Tetraphenyl-1,2'-Biimidazole since demand began to climb in the custom and specialty chemical markets. Years on the manufacturing floor taught us one thing: consistency in product quality only comes from deeply understanding your raw materials, your reactions, and your equipment. It shows in the purity, in the performance our customers count on. No middlemen, no guesswork — everything comes off our own production line, maintained and improved by our process engineers and QC teams. Each batch carries our confidence.

    Understanding the Chemical: From Synthesis to Application

    Manufacturing 2,2'-Bis(2-Dichlorophenyl)-4,4',5,5'-Tetraphenyl-1,2'-Biimidazole isn’t simply a recipe. Our process relies on thoroughly monitored reaction conditions, seasoned handling of dichlorophenyl compounds, and purification methods honed through both experience and customer feedback. This material commonly goes by the trade shorthand BDBI, but on our floor, people know it by its structure — its halogenated aromatic rings and biimidazole core form the backbone that gives it a, frankly, unique set of properties compared to peers.

    Key Specifications Shaped by the Realities of Production

    The clean crystalline solid that rolls through our reactors presents a striking appearance, but the appearance only tells part of the story. Experienced personnel keep a close eye on melting point ranges, trace impurity levels, moisture content, and particle sizing. Analytical techniques go way beyond TLC spots or basic HPLC — we run full NMR, MS, sometimes even single-crystal X-ray depending on end-user needs. In one sense, every batch we produce has its own laboratory fingerprint.

    Long hours wrestling with filtration problems, equipment scale-up headaches, or an off-spec color taught us: a careful watch on processing pays off. When the process starts to drift, the downstream impact can spiral. Our teams catch these issues at source — we reject and rework, not rationalize or ship subpar product.

    Real-World Uses: What Sets This Molecule Apart

    Chemists might reach for biimidazole derivatives in organic synthesis, materials science, or specialty electronics applications. What sets this molecule apart in daily use is its halogen loading and extended aromatic system. These features translate into improved performance for photoinitiators and charge-transport agents in OLED or OPV research. Years ago, a customer in the field of specialty coatings described a jump in quantum efficiency after switching from a mono-halogenated variant to our dichloro product. Later, in polymer studies, researchers mapped the improved thermal stability directly back to our high-purity batches.

    Some will point to powder form as standard in the catalog, but on our side, we’ve seen demand shift towards custom milled products — finer, coarser, even compacted as pellets for automated processing. Adjustment in particle size distribution requires coordination between synthetic chemistry and mechanical processing, something that’s easier to navigate when you control every step of the process. Every change is possible because our teams work shoulder-to-shoulder across departments, not through a chain of intermediaries who rarely get their hands dirty.

    Differentiation: What You’ll Find Here That’s Absent in Commodity Batches

    Many chemical suppliers, especially traders, offer material described simply by name and CAS number. Our work does not begin — or end — with catalog listings. Real manufacturing forces you to grapple with upstream purity of starting materials, waste management, cycle times, and the tightening restrictions of global chemical policy. For some competitors, “acceptable” means 95% or below; our facility holds the line at higher minimums, discards material outside spec, and pushes forward with additional recrystallization if we see even a hint of residual halide or colored contaminants.

    Feedback loops from our customers come direct to our chemists and shift supervisors. We recalibrate not only in-process controls but also sourcing decisions as new challenges arise. During one stretch, environmental tightening put pressure on solvent emissions. Instead of cutting corners, our engineering team retrofitted a new solvent recovery line that both cut emissions and improved recovery yield by more than 12%. These are the changes you can only make when you’re deeply committed and hands-on.

    Trust and Traceability in the Chemical Chain

    There’s a reason serious research teams and manufacturers work directly with primary chemical producers. Full chain-of-custody means we can document everything from sourcing through logistics to final quality control. With 2,2'-Bis(2-Dichlorophenyl)-4,4',5,5'-Tetraphenyl-1,2'-Biimidazole, the traceability becomes even more important as regulatory scrutiny intensifies on both persistent halogen compounds and process-related residues.

    We believe transparency means more than just showing a paper trail. It means opening our manufacturing floor, sharing batch histories, and demonstrating real-time improvements. After an incident where a small (thankfully contained) shipment exhibited a slight off-odor, our QC team worked with the customer, ran cross-verification with their in-house analytics, and ultimately identified a shipping container artifact as the root cause, adjusting our packaging accordingly. That kind of collaborative approach only comes from actually making the product and standing behind every drum, sack, or jar that leaves our plant.

    Comparing This Molecule to Alternatives: Insights From Both Lab and Line

    Anyone who has run reactions with unmodified biimidazole knows the difference even a single substitution can make. Mono-chlorinated versions don’t provide the same resistance to thermal decomposition. Other tetraphenyl-imidazoles might work as photoinitiators at basic levels, but our dichlorophenyl variant displays higher light absorption — bringing efficiency and selectivity that translates to improved process economics and better final product quality.

    Over the years, we’ve observed that competitors outside the manufacturing arena don’t follow up on negative feedback, or they load blends with cheaper but less-functional analogs. Knock-off versions sometimes contain unacceptable isomeric impurities or mismatched particle size. That doesn’t fly in fine chemical synthesis, or in high-end electronics applications. Custom requests hit our process engineers’ desk every quarter: customers looking for adjusted halogen loadings, trace metal content below a certain threshold, or even specific color characteristics for downstream visualization. Real solution means involvement from start to finish.

    Manufacturing Thinking: Achieving Purity, Safety, and Sustainability

    We manufacture with a deep appreciation for safety — both for our staff and downstream users. Early in our production, we ran into issues with chlorinated waste streams. Simple disposal posed both regulatory and practical risk. By investing in on-site, closed-loop treatments, we reclaimed reactants and reduced effluent, a decision that took months to implement but led to long-term sustainability and stability.

    Our plant operates under strict conditions, with air and liquid phase controls to prevent off-gassing or cross-contamination. These controls grew from small learning experiences, such as solvent odor complaints from nearby facilities and later from our own testing. Even the choice of PPE grew out of real hazard evaluations rather than blanket requirements. Employees participate in regular safety drills, and equipment receives constant monitoring and preventive maintenance, not because regulation says so, but because we want all hands safe and all shipments clean.

    Responding to a Changing Market: End-User-Driven Innovation

    In crowded commodity markets, little room exists for feedback-driven change. Our work stands out because manufacturers listen to real-world problems — like dissolution rate challenges in photoresists or unexpected spectral characteristics in functional polymers. In one case, an advanced R&D group asked for support to change from standard batches to a micro-milled version that permitted smoother integration in an ink formulation. In less than two months, our engineers rebuilt a section of our line. These investments cost time and money, but they cement loyalty and drive continuous learning across our team.

    Sometimes, a small process tweak can snowball into savings or performance jumps downstream. Several customers have switched from other manufacturers’ versions of this molecule and later reported reduced purification costs and improved product throughput. That comes not only from high chemical purity but also from our willingness to align production schedules, accommodate batch size variation, and provide technical support during trial integration.

    The Importance of In-House Analytics

    Many outside the manufacturing sector rely entirely on COAs provided by suppliers or third-party labs. We run in-house GC, LC-MS, and multiple chromatography techniques for every batch. If an anomaly pops up — say, an unexpected retention time or a spectral shift — our synthetic chemists jump into troubleshooting mode. Years ago, a partner flagged a slight increase in residual solvents in their finished device. Pinpointing the issue required more than plugging numbers into software; our team traced the spike to a subtle change in a supplier’s batch of an upstream intermediate.

    That hands-on mentality means we spot problems quickly. More importantly, we share those findings, not just with analytical teams but also with production and even our largest customers. The approach builds confidence and ensures feedback flows in both directions. The tighter the feedback loop, the easier it becomes to adjust production schedules, anticipate downstream challenges, and verify performance parameters at both the lab and kilogram scale.

    Packaging, Logistics, and End-User Experience

    Packaging chemicals like 2,2'-Bis(2-Dichlorophenyl)-4,4',5,5'-Tetraphenyl-1,2'-Biimidazole brings unique challenges. Static buildup, moisture sensitivity, and the volatility of aromatic compounds create a need for truly robust storage solutions. Initially, we worked with off-the-shelf drums and jars — too often, we saw minor compromises, whether in permeability or risk of physical contamination. We hosted focus groups with lab and plant users, refined liners and closures, even modified fill weights to improve safe handling and minimize waste on the user side.

    Transport logistics have changed as buyers opt for just-in-time inventory rather than warehouse bulk. Our team coordinates shipments with a careful eye on weather conditions, customs paperwork, and regulatory changes in destination countries. One memorable cold snap forced us to rethink cold-chain handling after a delayed overseas shipment saw product compaction that affected downstream use. Every challenge pushed us to open new lines of communication with end users, ask direct questions, and in some cases, redesign labels for better clarity under field conditions.

    The Role of the Chemical Manufacturer in Regulatory Compliance

    Modern chemical production happens under a microscope. Compliance doesn’t mean filling out paperwork once a year — it means ongoing validation, adapting process documentation, and embedding traceability in every transaction. The statutes affecting halogenated aromatics, especially for export, keep evolving. Our compliance and technical teams constantly scan for new requirements, register changes with the relevant authorities, and regularly conduct internal audits.

    Occasionally, regulatory shifts demand significant adjustments. Last year, new export requirements created an urgent need for updated declarations on downstream usage. Rather than push the problem onto brokers or buyers, we gathered stakeholders, adapted our manufacturing paperwork, and even ran site visits with regulators to demonstrate our containment and tracking practices. This kept everyone on the right side of compliance but also streamlined the paperwork burden for our partners.

    Collaborative Problem-Solving — The Real Engine Behind Fine Chemical Manufacturing

    Open lines between production, technical service, and customers drive technical innovation more than any catalog or marketing campaign. Whether clients approach us with a need for alternative solvents, higher-purity runs, or expedited shipping, our teams pool their knowledge to deliver results. Take the instance of a customer moving from batch to continuous processing. Our engineers and chemists helped tailor product specifications, ran parallel sample trials, and supported process validation — all without outsourcing any step.

    Those kinds of partnerships generate knowledge on both sides. We record product and process modifications for internal learning and future customer benefit. Regular workshops, both in-person and virtual, keep teams aligned. Field engineers spend time at customer sites; customer R&D teams tour our production facilities. Shared results help us both anticipate new challenges and seize opportunities for mutual growth.

    Anticipating Future Trends and Challenges

    Chemical manufacturing never truly stands still. Sustainability, safety, and efficiency requirements continue to evolve. For halogenated specialty molecules like 2,2'-Bis(2-Dichlorophenyl)-4,4',5,5'-Tetraphenyl-1,2'-Biimidazole, the focus on lifecycle impacts grows more intense every year. Our team actively invests in green chemistry alternatives, including lower-toxicity solvents and closed-system operations that recycle more process materials. Already, pilot runs use reduced-waste protocols that saved costs and minimized regulatory overhead.

    Meanwhile, customers experiment with new applications — areas like advanced electronics or specialty polymers. We lend support at the molecule level and at the level of supply chain transparency, so research groups and formulators can track every input. The process will only get more rigorous. We monitor ISO, REACH, and other frameworks so that customers never encounter downstream problems with finished goods. And we continue to ask our own teams — what can we do to make this process safer, cleaner, and smarter?

    Looking Forward: The Value of Direct Manufacturer Relationships

    Long-term users of 2,2'-Bis(2-Dichlorophenyl)-4,4',5,5'-Tetraphenyl-1,2'-Biimidazole will recognize not just the technical benefits but the difference that comes from direct access to the producer. Having everything in-house — R&D, scale-up, production, quality control, logistics, compliance — ties every step together and removes layers of risk, cost, and confusion. That means faster answers to technical questions, quicker reactions to supply chain challenges, and a standing invitation for users to help shape tomorrow’s product.

    From our earliest days, our team built trust not by promising perfection, but by responding, solving, and improving after every challenge. Over time, we have built a reputation on that responsiveness — one drum, one kilogram, one conversation at a time. This is the real difference you experience working directly with a chemical manufacturer who has lived and breathed the complexities and rewards of synthesizing and delivering a truly specialty product.