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HS Code |
821405 |
| Product Name | 3.5-Dibromopyridine |
| Cas Number | 626-05-1 |
| Molecular Formula | C5H3Br2N |
| Molecular Weight | 251.89 |
| Appearance | White to off-white solid |
| Melting Point | 64-67°C |
| Boiling Point | 234°C |
| Density | 2.049 g/cm3 |
| Solubility | Slightly soluble in water |
| Purity | Typically >98% |
| Synonyms | 3,5-Dibromo-pyridine |
| Smiles | C1=C(C=C(C=N1)Br)Br |
| Inchi | InChI=1S/C5H3Br2N/c6-4-1-5(7)3-8-2-4/h1-3H |
| Refractive Index | 1.655 |
As an accredited 3.5-Dibromopyridine factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | A 100-gram amber glass bottle sealed with a screw cap, labeled "3,5-Dibromopyridine," displays hazard symbols and handling instructions. |
| Container Loading (20′ FCL) | Container Loading (20′ FCL) for 3.5-Dibromopyridine: Typically accommodates 10-12 metric tons, packed in sealed HDPE drums or fiber drums. |
| Shipping | 3,5-Dibromopyridine is shipped in tightly sealed containers, typically glass or high-density polyethylene bottles, protected from moisture and light. Packages comply with regulations for handling hazardous chemicals, featuring proper labeling and documentation. During transit, it is kept under controlled conditions to prevent physical damage and ensure safety for both handlers and the environment. |
| Storage | **3,5-Dibromopyridine** should be stored in a tightly sealed container, in a cool, dry, and well-ventilated area, away from sources of ignition, heat, and incompatible substances such as strong oxidizing agents. Protect the chemical from moisture and light. Proper chemical labeling and storage in a designated flammable cabinet or chemical storage area are recommended for safety. |
| Shelf Life | 3,5-Dibromopyridine typically has a shelf life of 2-3 years when stored in a cool, dry, and tightly sealed container. |
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Purity 98%: 3.5-Dibromopyridine with purity 98% is used in pharmaceutical intermediate synthesis, where it ensures high yield and product consistency. Melting point 91-93°C: 3.5-Dibromopyridine with a melting point of 91-93°C is used in organic coupling reactions, where optimal thermal stability is required. Molecular weight 243.92 g/mol: 3.5-Dibromopyridine with molecular weight 243.92 g/mol is used in agrochemical development, where precise active ingredient quantification is critical. Stability temperature up to 120°C: 3.5-Dibromopyridine with stability temperature up to 120°C is used in polymer modification, where process integrity at elevated temperatures is maintained. Low moisture content (<0.5%): 3.5-Dibromopyridine with low moisture content (<0.5%) is used in fine chemical manufacturing, where minimized hydrolytic degradation is crucial. Particle size <100 µm: 3.5-Dibromopyridine with particle size <100 µm is used in catalyst preparation, where improved dispersibility and reaction efficiency are achieved. Assay by HPLC ≥99%: 3.5-Dibromopyridine with assay by HPLC ≥99% is used in medicinal chemistry, where high analytical purity supports reliable research outcomes. Light sensitivity: 3.5-Dibromopyridine with controlled light sensitivity is used in photochemical experiments, where product integrity during handling is preserved. Residual solvent <0.1%: 3.5-Dibromopyridine with residual solvent <0.1% is used in API synthesis, where impurity levels remain within regulatory thresholds. Reactivity index: 3.5-Dibromopyridine with a high reactivity index is used in halogen exchange reactions, where increased process throughput is delivered. |
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People who spend their days among glassware and pipettes know the value of choosing the right building block. Consider 3.5-Dibromopyridine. Chemists turn to it not for the label or the chemical code, but because of the unique possibilities tucked into that molecular structure. Its two bromine atoms sit in the third and fifth positions along the pyridine ring, an arrangement that makes a real difference out in the real world.
In the hunt for new medicines, ag chemicals, or materials that do what older ones couldn’t, professionals reach for intermediates that let them build up or break down molecules with less fuss. 3.5-Dibromopyridine's dual bromine atoms come into play here. Compared side-by-side with something simpler, like monobrominated pyridine, this molecule gives extra flexibility in synthesis. Researchers can play selectively with each bromine, guiding cross-coupling reactions to put together bigger, more complex structures. One good example is the Suzuki-Miyaura coupling. With two reactive sites, chemists string together two different aryl groups in a single molecule, shaping new scaffolds that could fit a pharmaceutical purpose. That's the nuts-and-bolts value people miss if they see only a line-drawing or a technical data sheet.
Ask anyone who's chased a promising lead compound how much difference a single atom can make. Medicinal chemists rely on the versatility of the pyridine ring. 3.5-Dibromopyridine fits right into this playbook. A pair of good leaving groups lets teams try all sorts of substitutions. It also sets up the possibility for iterative synthesis, where each bromine can be replaced in turn, helping narrow down the search for next-generation drug molecules.
In one project, chemists leveraged this compound to attach polar groups that upped water solubility, key for oral drugs. Elsewhere, its symmetric substitution pattern made it easy to create analogs and control stereochemistry—an often-overlooked edge when chasing pharmacological specificity. Looking at the big picture, the ability to design, test, and tweak analogs quickly means time and resource savings, especially when research runs up against tight deadlines.
3.5-Dibromopyridine finds its way onto the benches of agricultural labs too. Formulators looking to discover or optimize new herbicides and insecticides use building blocks that are both reactive and predictable. This dibromopyridine gives just that. Having two bromine atoms on the ring lets chemists introduce extra branches, like electron-donating or electron-withdrawing groups, tailoring each molecule for better biological activity or improved environmental stability.
Where a typical mono-substituted pyridine might dead-end through unwanted side products or tough separations, the more clearly defined substitution points on 3.5-Dibromopyridine let teams steer their reactions. This isn’t just about convenience. It makes pilot projects more reproducible and scales up to production with fewer headaches, which can mean millions in cost and months shaved off time-to-market. Across the industry, anyone who’s missed a growing season or a regulatory deadline can tell you how crucial that kind of reliability becomes.
Projects rarely stay on paper for long. Once an experiment works, the next challenge comes down to making enough product to go further—whether that means animal trials, greenhouse testing, or a few kilos for a bigger batch. Here, 3.5-Dibromopyridine stands apart from more cumbersome building blocks. Its melting point and standard state keep it stable through moderate swings in temperature and humidity, avoiding headaches that come with ultra-reactive or air-sensitive chemicals.
While some specialty halogenated aromatics suffer from poor yields, expensive purification, or quick degradation, this compound’s track record stands solid. In personal experience, once the right extraction protocol is found, yields stay consistent from small glass flasks right up to pilot reactors. This consistency is a big reason labs large and small keep a bottle or two on the shelf, even when budgets creak.
It’s tempting to lump all pyridines or all dibrominated building blocks together, but actual use cases show otherwise. For instance, compared to 2,6-dibromopyridine, the unique substitution pattern of 3.5-Dibromopyridine changes electron distribution in the ring. As solvents shift or reaction partners swap in, these subtle differences show up in reactivity and selectivity. Medicinal chemists notice this when isolating products, sometimes seeing higher yields, sometimes spotting less troublesome byproducts.
With halogenated aromatics, small tweaks ripple out. In one agricultural project, switching from a 2,6 to a 3,5 arrangement not only altered the product’s target affinity but also affected formulation properties. The 3,5 version handled alkylation better, lending itself to field formulations that held up longer in storage. Differences like these motivate professional buyers who don’t just chase the lowest price, but know firsthand the value of fewer purification steps and higher batch reliability.
Working with brominated aromatics comes with its own set of challenges. People in the lab learn pretty quickly not to underestimate fumes or dust, and 3.5-Dibromopyridine is no different. Even seasoned chemists follow well-worn safety habits: gloves that fit, strong ventilation, careful storage away from acids and oxidizers. From my early days in academic labs, I learned not to take packaging for granted—an opened bottle exposed to air grows impurities. Strict labeling and rotation keep surprises out of the workflow.
When scaled up, attention to detail gets more important. Forklift traffic in a manufacturing setting doesn’t care about delicate reagents, so secondary containment and spill protocols aren’t just a formality. Real progress comes from a culture that values safety. Supervisors who insist on regular training and transparent accident reporting help maintain this focus.
No one working in chemistry today ignores environmental expectations. Regulation gates access to global markets, and waste treatment rules influence everything from procurement to disposal. With 3.5-Dibromopyridine, the risk isn’t just about handling—it’s about where by-products and run-off end up. The bromine atoms signal persistence and potential toxicity in aquatic environments, so labs that take stewardship seriously put extra effort into closed-loop systems and responsible reclamation.
On an operational level, investment in effective scrubbers and waste neutralization beats “end-of-pipe” fixes. Regulatory fines and negative press teach tough lessons quick. Some operations have piloted solvent recycling just to keep dibrominated waste fractions out of local waste streams. Advice from peers who have seen the consequences of a poorly managed chemical program: the up-front investment in green chemistry pays off faster than most expect, especially as oversight tightens worldwide.
From my time working on heterocycle libraries in a campus lab, 3.5-Dibromopyridine earned a spot thanks to its straightforward handling and reliable outputs. Routinely, it allowed us to try bolder synthesis, introducing two pharmacophores in a single step. Some nights after a string of failed reactions, having a solid intermediate that just worked smoothed out hours of troubleshooting.
For experimentalists, being able to run pilot reactions at bench scale and see similar results in larger batch syntheses saves frustration. Colleagues often trade stories of late-night troubleshooting, but too many headaches can usually be traced back to unreliable building blocks—something our teams came to appreciate each semester.
Research never runs out of fresh questions, and 3.5-Dibromopyridine keeps popping up in the answers. New palladium cross-coupling techniques draw on the predictability this molecule offers, letting teams swap in non-standard functional groups without losing control over regiochemistry. Specialized catalysts or greener solvents might change the equations year by year, but a solid substrate lays the best foundation.
In my years working with start-ups and established labs, one lesson keeps coming back: choose intermediates that empower experimentation, not restrict it. Younger chemists adjusting to tight timelines or pivoting between projects gain an edge if their supplies give them extra options. Operational flexibility, often overlooked, translates into intellectual freedom.
Materials science stands on the edge of big shifts. With electronics moving toward ever-thinner, flexible circuits, heterocyclic compounds like 3.5-Dibromopyridine play a growing part in crafting specialty polymers. Its transformation into conductive or photoreactive derivatives gives research teams the leverage they need, especially when traditional aromatics hit their limits. In my industry conversations, more R&D managers are making room in budgets for dibromopyridine-based projects—seeing real-world progress as new devices move from proof-of-concept to manufacturing.
The pharmaceutical field isn’t standing still either. Dance around regulatory gray zones and you find medicinal chemists blending new structures off this backbone, hoping to escape known resistance patterns. Structure-activity relationship studies often return to this molecule because swapping out the bromines, one at a time, carves out easy SAR mapping. I’ve watched teams generate full arrays for antiviral screens in weeks rather than months, then pivot on a dime as results pour in.
There’s no denying that cost and quality must always be weighed. In competitive settings, decision-makers want more than just purity data and delivery times. They ask about batch reproducibility, shelf stability, and support for scaling up. My advice: prioritize consistent suppliers with clear documentation, and don’t cut corners testing each new lot. The savings in time and the peace of mind that come with fewer failed syntheses outweighs any momentary price dips. If the supply chain stumbles, having a reputation for dependability counts for a lot.
No chemical comes without trade-offs. For all its virtues, 3.5-Dibromopyridine costs more per gram than basic monohalogenated aromatics. Supply chain hiccups, particularly with bromine feedstocks, can pinch production. Those running lean inventories learn to reach out early to suppliers and sometimes keep alternate routes on paper just in case. Staying on top of market conditions and maintaining professional networks smooths those bumps, something industry veterans will confirm.
The other challenge sticks to safety. With growing pressure to reduce halogen use or shift to greener chemistry, some teams invest in research to find less persistent or less hazardous substitutes. Fine-tuning cross-coupling reactions to use less toxic transition metals—or to recycle the spent bromide—has shown promise. I recall a pilot project exploring enzymatic halogen exchange, aiming to leave behind only the necessary bromination while reclaiming the rest. These innovations might not replace 3.5-Dibromopyridine tomorrow, but they point to a future where trade-offs are less harsh.
A decade in the lab teaches respect for the little things. Reliable intermediates, like 3.5-Dibromopyridine, do more than fill catalogs. They help researchers take bigger risks in exploration and lower the barriers for new discoveries. Doctors, farmers, and engineers benefit indirectly from the right choice at the molecule stage, whether they know it or not. Most overlooked innovations, especially in green chemistry, trace back to teams who saw room for improvement, not satisfaction with “good enough.”
In every research group I’ve known, mentorship plays a role too. Sharing hard-won tricks and the right suppliers maintains standards across generations. Taking the long view, investments in dependable intermediates, careful documentation, and greener processes build trust up and down the line. In science and industry, that reputation keeps research moving, even in lean years or through regulatory storms.
Future advances won’t come from new molecules alone, but from smarter ways of working together. Whether it’s through collaboration across companies or open sharing of improved protocols online, professionals keep raising the bar. 3.5-Dibromopyridine, while not flashy, reflects this mindset: it’s a stable platform that lets teams build, test, and adapt. Looking ahead, smart labs will keep combining reliable chemistry with ongoing improvements in safety, efficiency, and sustainability.
The industry stands on firm ground when researchers, buyers, and regulators keep open channels and value tested experience as much as technical specs. No matter the direction of new discoveries, the practical knowledge built from working with trusted intermediates forms the bridge between possibility and progress—one reaction, one project at a time.