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4,4'-Dipyridyl Hydrate

    • Product Name 4,4'-Dipyridyl Hydrate
    • Alias Bipyridine Hydrate
    • Einecs 220-007-7
    • 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

    887617

    Chemical Name 4,4'-Dipyridyl Hydrate
    Cas Number 33486-00-7
    Molecular Formula C10H8N2 · xH2O
    Molecular Weight 184.22 g/mol (anhydrous)
    Appearance White to off-white crystalline powder
    Melting Point 111-113 °C (anhydrous)
    Solubility Soluble in water, ethanol, and ether
    Density 1.12 g/cm³ (approximate, anhydrous)
    Boiling Point Decomposes before boiling
    Storage Temperature Store at room temperature, tightly closed

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

    Packing & Storage
    Packing A 100g amber glass bottle with a secure screw cap, labeled “4,4'-Dipyridyl Hydrate”. Includes hazard warnings and batch information.
    Shipping 4,4'-Dipyridyl Hydrate is shipped in secure, airtight containers to prevent moisture exposure and maintain purity. Packaging ensures safety during transit and complies with chemical transport regulations. Proper hazard labeling is included, and handling instructions are provided. Shipments are tracked, with prompt delivery to minimize degradation and ensure safe, compliant arrival.
    Storage 4,4'-Dipyridyl Hydrate should be stored in a tightly sealed container, in a cool, dry, and well-ventilated area. Keep it away from incompatible materials such as strong oxidizers, acids, and bases. Protect from moisture and direct sunlight. Store at room temperature and ensure proper labeling. Use appropriate personal protective equipment when handling to avoid exposure.
    Application of 4,4'-Dipyridyl Hydrate

    Applications of 4,4'-Dipyridyl Hydrate in Industrial Manufacturing

    As an original chemical manufacturer, we supply 4,4'-Dipyridyl Hydrate to advanced sectors requiring precise purity and controlled reactivity. The following sections illustrate verified downstream uses with industrial integration, operational dosage, processing stages, and end product types relevant to each segment.

    1. Homogeneous Catalysts for Olefin Polymerization

    4,4'-Dipyridyl Hydrate functions as a nitrogen-donor ligand for transition metal catalysts, especially in late transition metal-based polymerization systems for specialty polymers. Users in polymer resin production incorporate 4,4'-bipyridine complexes during catalyst preparation to modulate reactivity or stereoselectivity. Controlled addition ensures defined polymer properties in the final resin matrix.

    Industry compliance standards

    • ISO 9001:2015 Quality Management
    • REACH (EC 1907/2006) chemical registration for catalysts in polymers
    • EU Directive 2002/72/EC for polymer additives
    • ASTM D3159 for testing olefin copolymers

    Typical usage ratio

    • 0.1-2% by weight relative to total catalyst system
    • Adjustment depends on metal type and required ligand/metal molar ratio
    • Process parameters account for target molecular weight
    • User controls impurity threshold <500 ppm for finished resin

    Downstream process integration

    • Incorporation during catalyst pre-complexation in inert solvents
    • Ligand pre-activation with metal precursors before batch or continuous polymerization
    • Post-polymerization removal or neutralization phase if required
    • On-line spectrometric QC to monitor ligand consumption

    Final product types

    • Specialty polyolefins and functionalized resins
    • Copolymer engineering plastics
    • Elastomeric seal components
    • Performance films for automotive/interior use

    2. Pharmaceutical Intermediates in Active Ingredient Synthesis

    4,4'-Dipyridyl Hydrate serves as a building block for heterocyclic intermediate formation in API manufacturing, particularly for anti-infective and cardiovascular compounds. It enters the route as a condensation or coordination reactant during multi-step synthesis where strict impurity profiles must be maintained according to pharmacopeial standards. Material characteristics and water content require monitoring to meet threshold specifications in validated production environments.

    Industry compliance standards

    • ICH Q7A GMP for API manufacturing
    • USP/NF Monographs for intermediates
    • Ph. Eur. 10.0 for raw material limits
    • FDA 21 CFR 211 for pharmaceutical ingredients

    Typical usage ratio

    • 1.5-7 mol% relative to parent aromatic compound
    • Process established from route-specific synthesis
    • Water content monitored <0.5% for critical steps
    • Excess recycled or removed in work-up as per SOP

    Downstream process integration

    • Charged in condensations or cyclizations with active esters
    • Introduced under nitrogen atmosphere at controlled temperature
    • Removal via liquid-liquid extraction or crystallization
    • Batch documentation of input/output reconciliations per GMP

    Final product types

    • API heterocycles for anti-fungal tablets
    • Pyridine-derived blood pressure actives
    • Antibacterial agents for oral or injectable use
    • Diagnostic marker chemicals

    3. Electroplating Additive in Electronic Connector Manufacturing

    This compound functions as a grain-refiner and plating complexant for nickel and copper electrodeposition in the high-reliability electronics sector. Controlled amounts are dosed into plating baths to enhance surface morphology and conductivity of connectors, switches, and printed circuit board contacts. Its hydrated form prevents premature decomposition during solution make-up and gives stable deposit properties.

    Industry compliance standards

    • IPC-4552 for electroless nickel/immersion gold (ENIG)
    • IEC 60068-2-20 for solderability
    • RoHS Directive (2011/65/EU)
    • ISO/TS 16949 for automotive electronics

    Typical usage ratio

    • 10-180 mg/L final bath concentration
    • Buffer solution pH maintained 4.0-6.5
    • Ratio fine-tuned per current density and deposit thickness
    • Continuous bath monitoring for peak uniformity

    Downstream process integration

    • Added directly to filtered, circulating plating tank
    • Combined with brightener and carrier additives
    • On-line dosing based on amperage and replenishment rate
    • QC ensures compatibility with pre-treatment and rinse stages

    Final product types

    • Pogo pins and spring-loaded connectors
    • Multi-pin PCB edge contacts
    • Copper-plated leadframes
    • Gold-finished micro-switches

    4. Analytical Reagents in Mining and Metallurgical Laboratories

    4,4'-Dipyridyl Hydrate is widely employed in wet chemical laboratories as a selective colorimetric indicator for ferrous iron (Fe2+) in ore and concentrate assays. Used in titration, extraction, and photometric calibration, its purity and hydration level directly influence determination sensitivity and precision. Laboratory environments control contamination and batch identity throughout the testing process to comply with reporting and auditing frameworks in mining supply chains.

    Industry compliance standards

    • ISO 17025 Laboratory Accreditation
    • ASTM E394/E394M for iron analysis
    • Bureau of Mines standard methods
    • OECD Good Laboratory Practice (GLP)

    Typical usage ratio

    • 0.1-1.0 g per 100 mL titration solution
    • Dissolved in acetate buffer at pH 4.5-5.5
    • Adjusted to sample weight and detection limits per method
    • Direct reaction with up to 10 mg Fe sample load

    Downstream process integration

    • Reagent weighed and dissolved immediately prior to analysis
    • Applied during Fe2+ quantification via visible light absorbance
    • Included in automatic burette or colorimeter feed
    • Residue disposed under certified hazardous waste handling

    Final product types

    • Iron assay laboratory reports
    • Ore certification data packages
    • Environmental monitoring submissions
    • In-house ore grade control databases

    5. Synthesis of Coordination Polymers for Gas Storage Materials

    This material acts as a bridging ligand in the construction of microporous coordination polymers and metal-organic frameworks (MOFs) used for gas adsorption processes. Producers synthesize frameworks by combining hydrated bipyridyl with metal salts in solvent-mediated self-assembly, controlling temperature and solvent evaporation for defined network geometry and porosity. The hydrate form affords improved solubility and uniform complexation during batch crystallization.

    Industry compliance standards

    • ISO 18385:2016 for laboratory chemical traceability
    • REACH for MOF materials (application-specific registration)
    • NACE SP0290 for gas containers (where applicable)
    • ASTM D5430 for surface area analysis

    Typical usage ratio

    • 0.5-1.2 molar equivalents relative to total metal content
    • Ratio tailored by framework topology and target pore size
    • Solvent and additive adjusted for scalability
    • Crystallization at 25-120°F, depending on design

    Downstream process integration

    • Blended in sealed reactor with metal precursors
    • Gradual solvent reduction by controlled evaporation
    • Batch seeded during nucleation phase for uniformity
    • Mother liquor recycled for subsequent syntheses

    Final product types

    • Metal-organic frameworks for gas storage
    • CO2/CH4 separation cartridges
    • Catalytic substrate beds
    • Porous functionalized fillers

    6. Corrosion Inhibitor Formulation for Power Plant Cooling Systems

    Industrial water treatment specialists employ this compound as a chelating agent to mitigate ferrous ion catalyzed corrosion in closed-circuit and recirculating cooling systems. Precision dosing inhibits localized metal attack in high-pressure, high-temperature circuits common to power generation and petrochemical utility units. Users regulate the feed based on water chemistry, conductivity, and iron monitoring to align with plant-specific EHS protocols and discharge limits.

    Industry compliance standards

    • ASTM D512 for iron quantification in water
    • ISO 14001:2015 Environmental Management Systems
    • EPA NPDES water discharge permits
    • ASME BPVC Section VIII for boiler and pressure vessel safety

    Typical usage ratio

    • 5-80 mg/L depending on water throughput and iron load
    • Continuous or slug dosing coordinated with inhibitor package
    • System-specific—based on make-up water quality and operational cycles
    • Periodic recalibration according to field sample data

    Downstream process integration

    • Pumped to main feedwater or side-stream dosing stations
    • Inline analyzers track residual complexant and metal ion presence
    • Integrated into blended inhibitor, biocide and scale control packages
    • Record-keeping as per plant operation management systems

    Final product types

    • Treated cooling water for condenser circuits
    • Corrosion management system outputs
    • Process water for steam generation
    • Water chemistry compliance reports
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    Certification & Compliance
    More Introduction

    4,4'-Dipyridyl Hydrate: A Manufacturer’s Perspective on Crafting and Supplying Quality

    Understanding 4,4'-Dipyridyl Hydrate and Its Role in the Modern Lab

    Making 4,4'-Dipyridyl Hydrate isn’t about pushing a batch through a reactor and sending it out the door. Over the years, walking through our warehouse and standing beside our reactors, I’ve realized the small, quiet things matter: moisture levels, consistency, and the reassurance a customer gets every time a drum leaves our facility. Anyone who has handled this pyridine derivative knows how critical purity and hydration are to yield accurate experimental results and reproducible processes. You want a chemical that behaves as expected and doesn’t throw a wrench in reaction schemes—especially during metal-ligand complex formation, which is where this compound sees the bulk of its use.

    As chemists and process engineers, we focus on delivering a material that holds up to the kind of scrutiny one expects in a lab, whether it’s used as a ligand in coordination chemistry, a polymerization modifier, or a reagent in pharmaceutical and agrochemical research. 4,4'-Dipyridyl Hydrate stands out for one reason: our hands-on experience with controlling hydration levels and shelf-life stability, both factors that far too often get overlooked by traders or those pulling product from multiple sources.

    Working with Hydrate Over Anhydrous: Real-World Differences

    Newcomers sometimes come to us asking for 4,4'-Dipyridyl by name, not realizing that the hydrate and anhydrous forms won’t give identical results. Our hydrate is not an afterthought or a byproduct; we manufacture it purposefully for those applications where controlled water content makes a difference—especially when handling sensitive crystalline forms or those running solvent-dependent reactions.

    Handling the hydrate is less finicky on the bench. You don’t contend with the electrostatic cling and the dusting you see with the anhydrous version; moisture content is tightly regulated, so what you weigh is what you get. In our facility, final product passes moisture analysis again before we pack it, because slipping up in this step jeopardizes everything downstream.

    Specifications and Quality Assurance Rooted in Experience

    Our standard lot of 4,4'-Dipyridyl Hydrate runs at a defined molecular composition with consistent hydration, matching the requirements common to the metal chelation, analytical, and catalyst pre-cursor sectors. Rather than replicating specs from a data sheet, we pay more attention to batch-to-batch consistency—this is what our repeat clients ask for, not the theoretical max purity. They expect a white crystalline powder that packs up dry, free-flowing, and stable for months in storage, provided it stays sealed. We’ve experimented with different packaging and found that double-layer polyethylene lining keeps the hydrate at its ideal water content much better than paper-based sacks, especially during the summer months.

    We don’t hide behind fancy guarantees—samples from every lot run through moisture titration, melting point checks, and NMR before we fill our shipping labels. If a sample falls short, we halt packing and trace the issue. The aim isn’t only to meet numbers for the sake of compliance; it’s about saving you the trouble of discovering faulty material after investing in a run of experiments. Reliability doesn’t come by accident; it grows from a willingness to pull subpar product, even if it hurts the bottom line for that week.

    Why Hydrate? Practical Value Beyond the Sale

    There’s always a temptation to buy the anhydrous solid—who wants water unless it’s necessary? In actual use, chemists find the hydrate easier to handle because it doesn’t clump up in humid air. In our early days, before we moved to a temperature-controlled packaging line, we struggled with inconsistency in the final product when delivering over long distances. Now, we can say confidently: our hydrate maintains granulation, avoids caking, and shows excellent performance across various environments.

    Some customers return to the hydrate after struggling with the handling quirks of the pure anhydrous form. The hydrate behaves much more predictably during transfer and weighing. That reliability often means fewer headaches down the line for both synthetic chemists and those running automated dosing equipment. It’s not just about what the label claims, but how the product acts on a busy bench top.

    Thoughts on Use in the Laboratory and Industry

    Labs come in all shapes and sizes—from tiny university setups to bustling contract research operations. The people using our 4,4'-Dipyridyl Hydrate want assurance it won’t introduce extraneous variables. We have worked directly with teams developing transition-metal catalysts, where the presence of even small amounts of contaminants can alter reactivity profiles. During customer feedback sessions, researchers spotlight the importance of consistent hydration—especially in protocols involving finely tuned stoichiometry for metal complex syntheses.

    Our facility’s proximity to end-users in fine chemical and pharmaceutical sectors offers another perspective: shipping and handling can play a hidden role in product quality. We’ve grown used to urgent calls during monsoon season, where sudden spikes in ambient moisture ruin a batch of material sourced from lesser-known suppliers. Our addition of moisture-barrier packaging and robust storage solutions directly addresses these real-world issues.

    Aside from coordination chemistry, 4,4'-Dipyridyl Hydrate serves as an essential intermediate in certain types of oxidation-reduction studies and supramolecular assembly investigations. Researchers value its well-defined hydration state, which leads to greater reproducibility in kinetic studies. The material’s crystalline nature also aids in precise melting point analysis—another feature that appeals to the analytical chemist’s need for confirmation at every step.

    Innovation and Ongoing Improvements: Perspectives from Production

    Twenty years ago, hand-written batch logs and simple air-drying were standard. Back then, material sitting too long on the rack could pick up more water than desired, causing ‘off spec’ lots. Learning from those challenges, we invested in better drying ovens, humidity controls, and walk-in monitors for the raw materials staging area.

    Our team sought feedback not only from big customers but also from small startup labs, who often spot problems others miss. Continuous monitoring of humidity, faster testing turnaround, and improved documentation have cut our out-of-spec rate to the lowest it’s ever been. We now keep a database of customer-reported issues—clumping, color deviation, delayed dissolution—all to track recurring trends and focus our energy on eliminating root causes. From the warehouse crew to the R&D chemists, each step of the process benefits from having seen the effect of overlooked details in the field.

    We continue to refine our crystallization process, taking seasonal temperature swings into account. Realistically, the temperature in the reactor and drying room changes from winter to summer. So does the local humidity. In the early days, trying to force a “one formula for all months” approach led to headaches. Today we adjust the process parameters batch by batch, aiming for consistency without needing costly chemical recalibration after every shipment.

    Process innovation, as we see it, lives in these details. Instead of chasing after ‘catchy’ green chemistry labels that sometimes offer more marketing than actual improvement, we focus on streamlining our hydration control and using energy only as needed during drying. Feedback loops between our quality assurance team and operators help flag emerging issues early, so problems get solved on the shop floor, not in distant boardrooms.

    Comparing Hydrate to Other Nitrogen-Based Ligands

    Anyone who uses nitrogen ligands for metal coordination knows how many structural variants crowd the market. Pyridine, 2,2'-Dipyridyl, and 4,4'-Dipyridyl all serve distinct functions depending on the metal substrate and the complex’s geometry. What sets 4,4'-Dipyridyl Hydrate apart is the geometry of the bipyridine framework, which offers ideal spacing for bridging in many di- and polynuclear metal complexes, giving stable chelation that’s hard to match with simple pyridine.

    Ours is manufactured to remain consistent in physical form, avoiding the small brown or off-white discolorations occasionally seen from less carefully managed sources. We have learned through customer feedback that minor impurities or inconsistent color can throw off workups, particularly for researchers aiming at optical or fluorescence studies where clarity is critical. While price per kilo always factors into purchasing decisions, the feedback we get time and again is that headaches avoided through quality often save more money than shaving a few cents off each gram.

    Compared to the more common anhydrous version or to sibling compounds like 2,2'-Dipyridyl, our hydrate maintains handling ease and predictable solubility in water and polar organic solvents. This difference in everyday usability becomes even more pronounced when working with large-scale batch reactions, where hygroscopic compounds tend to clump and resist efficient dissolution. Our hydrate, by design, sidesteps those problems.

    Direct Feedback from End-Users and What We’ve Learned

    In the last decade, we’ve seen a surge in direct collaboration with research teams, many of whom stopped ordering from traditional distributors because of supply chain headaches. One university chemist pointed out that our hydrate’s stable white form simplified their analyses by removing the need for extra drying or titration steps before every single experiment. In high-throughput settings, these small time savings add up, allowing labs to focus energy where it counts—on results.

    A specialty chemicals company reported back after using bulk hydrate for scale-up experiments involving transition metal complexes. Their primary concern had been internal batch uniformity and reliable solubility at larger volumes. After repeated good results, they shifted more of their portfolio to our material and sent their own feedback on minor pain points, which we then used to adjust our sieving and drying protocols. This direct loop between bench and plant is our core advantage as manufacturers—not merely as providers of a catalog item but as partners invested in solving daily challenges as they arise.

    Packaging, Storage, and Delivery: Practical Considerations

    We put as much thought into packaging as we do synthesis. A steady stream of complaints about clumped material and water uptake led us to prefer double-foil layers and sealed moisture-proof lining. After years of dealing with failures from third-party shippers parking pallets for hours on hot, humid docks, we tightened up chain-of-custody procedures and started consolidation shipments to ensure quick transfer from our drying line to your lab. Our attention to packing details keeps the hydrate usable for much longer, especially during long transits or when storage conditions can’t be easily controlled.

    Avoiding last-minute surprises has also shaped our logistics—real experiences, not just theory. Having handled lost shipments, misrouted orders, and customs delays, we learned to keep extra inventory ready and partner with reliable carriers. Whenever we hear that a client’s supply chain relies on precise timing, we double our efforts to get order confirmations and real-time tracking in place.

    We suggest storing the drums in cool, dry areas, with the lids tightly closed after every use. Labs pressed for space sometimes cut corners, but we stress the value of routine: reseal after every scoop, track opening times, and keep the environment steady. Stories circulate among our staff about product longevity—samples left untouched for half a year or more emerge unchanged when stored in the right conditions. Our approach is guided not only by chemistry but by years of listening to end-user feedback and observing the effects of real-world lab conditions.

    Our Commitment to Transparency and Ongoing Communication

    Manufacturing 4,4'-Dipyridyl Hydrate comes with responsibilities—the obvious ones tied to chemistry and some less visible, dealing with the trust clients place in us. We don’t lose sight of that trust, even as production capacity grows. Regular contact with long-term partners shapes our upgrades; their real-world challenges drive meaningful changes on our end. Rigorous documentation accompanies each batch, and results from each QC checkpoint are always accessible for review.

    For labs verifying lot-to-lot consistency, we understand the frustration of unexplained changes in product performance. It’s why every batch gets logged down to operator shifts, room conditions, and origin of raw inputs. Rather than hiding behind technical jargon or only offering test certificates on request, we believe in ready transparency. It keeps everyone honest—from the plant floor to the lab bench.

    Supporting Green Chemistry and Sustainability Efforts

    While the compound itself does not directly impact the environmental footprint in most current applications, we’ve taken steps to minimize waste through energy reduction during drying and reusing barrels where practical. This came partly from our own staff, many of whom care as much about sustainability at work as they do at home. We’ve found ways to optimize loads, match deliveries more closely with user demand, and slowly incorporate more sustainable packaging without sacrificing protection from moisture or contamination.

    Improving efficiency in our own operations—by trimming unnecessary steps, rethinking cooling and heating protocols, and sourcing electricity from renewable partners—means we offer material that doesn’t carry hidden environmental costs once it leaves our facility. These steps sometimes take longer to implement than we like, but we see direct benefits for all involved: reduced breakage, fewer returns, fewer supply interruptions.

    Common Challenges and Our Approach to Solutions

    Hearing about challenges directly from customers has been more valuable than any consultant’s report. Chemists sometimes run into issues dissolving material, or find that a particular lot behaves differently when switched from smaller vials to larger containers. We adjust our grind size, test more frequently for caking tendencies, and work quickly to resolve complaints. No chemical process is problem-free, but the ability to adapt and communicate openly makes all the difference.

    Infrequent but well-documented incidents of transit damage or heat exposure prompted us to improve not just packaging but to work with logistics partners on temperature-controlled routes during peak summer. We also keep communication clear about potential delivery delays during regional weather events, which avoids unpleasant surprises for time-sensitive research projects.

    Another area requiring constant vigilance is maintaining the delicate balance between hydration and long-term stability, especially when dealing with clients placing orders months in advance. Rather than guessing, we routinely test archived samples from previous months to track trends. These efforts pay off as clients report fewer unplanned halts to production or research runs.

    Looking Forward: Real Partnerships, Not Just Transactions

    As direct manufacturers, our work with 4,4'-Dipyridyl Hydrate managed to outlast product cycles and shifting demand curves largely because we took feedback seriously and stayed rooted in the realities of chemical production. We are not insulated from the daily realities of transport, stock management, or lab troubleshooting. Over the past decade, we’ve welcomed site visits, invited repeat customers to inspect batches as they’re packed, and maintained a constant line of communication open for suggestions or concerns.

    No two labs face exactly the same issues, but by keeping our process and documentation open to scrutiny and being willing to adapt, we’ve managed to anchor trust with partners in research, industry, and beyond. Our investment in quality control, transparent communication, and flexible logistics came directly from lessons learned and stories told by chemists and staff alike. Our promise to you rests not only on a clean white powder in a labeled drum, but on dozens of people who stand behind the material, ready to listen and respond to every challenge you face.

    Conclusion: Experience Shapes Every Batch

    The journey from raw material to finished 4,4'-Dipyridyl Hydrate isn’t short or automatic. Years of hard-won experience stand behind every container we ship. Details around moisture, purity, and handling—often overlooked—have cost clients time and money before coming to us. By carefully controlling the entire production chain, listening to feedback, and making concrete changes year after year, we strive to offer a product that doesn’t just meet a spec, but actually supports your work. For project deadlines, production runs, or routine experiments, having dependable material saves effort and brings peace of mind. That’s the perspective only a manufacturer’s experience can provide.