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HS Code |
299318 |
| Iupac Name | Diethyl 5-methylpyridine-2,3-dicarboxylate |
| Molecular Formula | C13H15NO4 |
| Molecular Weight | 249.26 g/mol |
| Cas Number | 67259-38-9 |
| Appearance | Colorless to pale yellow liquid |
| Solubility | Soluble in organic solvents such as ethanol and dichloromethane |
| Smiles | CCOC(=O)C1=NC=C(C)C(=C1)C(=O)OCC |
| Inchi | InChI=1S/C13H15NO4/c1-4-17-12(15)11-9(5-6-14-8-10(11)3)13(16)18-7-2/h5-6,8H,4,7H2,1-3H3 |
| Synonyms | 5-Methyl-2,3-pyridinedicarboxylic acid diethyl ester |
As an accredited Diethyl 5-methylpyridine-2,3-dicarboxylate factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Diethyl 5-methylpyridine-2,3-dicarboxylate is supplied in a 25g amber glass bottle with a tamper-evident screw cap label. |
| Container Loading (20′ FCL) | Container loading (20′ FCL): Securely packed 200 kg/drum, 80 drums (16,000 kg total) on pallets, moisture-protected, labeled per regulations. |
| Shipping | Diethyl 5-methylpyridine-2,3-dicarboxylate is shipped in tightly sealed chemical-resistant containers, labeled in accordance with regulatory standards. It should be handled with care, stored in a cool, dry place, and protected from sunlight and moisture. Transport complies with relevant safety, hazard, and environmental guidelines to ensure secure and safe delivery. |
| Storage | Store Diethyl 5-methylpyridine-2,3-dicarboxylate in a tightly sealed container, in a cool, dry, and well-ventilated area away from incompatible substances such as strong oxidizers and acids. Protect from direct sunlight, moisture, and sources of ignition. Label storage containers clearly and ensure appropriate secondary containment to prevent leaks or spills. Follow relevant safety guidelines and local regulations for chemical storage. |
| Shelf Life | Diethyl 5-methylpyridine-2,3-dicarboxylate has a shelf life of 2 years when stored tightly sealed, cool, and protected from light. |
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Purity 98%: Diethyl 5-methylpyridine-2,3-dicarboxylate at 98% purity is used in pharmaceutical intermediate synthesis, where high purity enhances target compound yield and minimizes impurities. Molecular weight 251.26 g/mol: Diethyl 5-methylpyridine-2,3-dicarboxylate with a molecular weight of 251.26 g/mol is used in heterocyclic compound formulation, where precise mass control ensures accurate stoichiometry in reactions. Boiling point 122°C (at 2 mmHg): Diethyl 5-methylpyridine-2,3-dicarboxylate with a boiling point of 122°C at 2 mmHg is used in vacuum distillation processes, where controlled volatility ensures gentle separation and high recovery rates. Stability temperature up to 50°C: Diethyl 5-methylpyridine-2,3-dicarboxylate stable up to 50°C is used in long-term storage applications, where thermal stability preserves chemical integrity over time. Melting point 32°C: Diethyl 5-methylpyridine-2,3-dicarboxylate with a melting point of 32°C is used in low-melting eutectic mixtures, where easy handling at room temperature simplifies processing. Refractive index 1.478: Diethyl 5-methylpyridine-2,3-dicarboxylate with a refractive index of 1.478 is used in specialty optical material synthesis, where precise refractive properties enhance device performance. Density 1.15 g/cm³: Diethyl 5-methylpyridine-2,3-dicarboxylate with a density of 1.15 g/cm³ is used in liquid-phase reaction media, where accurate density provides consistent mixing and reaction rates. |
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Work in a chemical plant is more than just batches and reactors; it’s a daily commitment to materials with unique personalities. Diethyl 5-methylpyridine-2,3-dicarboxylate stands out in our lineup because we’ve watched the industry’s appetite grow for complex intermediates with more than just broad brush functions. This compound’s appeal starts with its molecular structure—a methyl group slipped into the pyridine ring at the 5-position, paired with two carboxylate esters at the 2 and 3 spots. Chemistry’s a lot about the details, and these details matter every day as we run reactions, handle phases, and monitor purity.
From our end, we approach every kilo of this material with the accumulated hands-on know-how of hundreds of runs. No lab-grade simulation or catalog page will capture the quirks of its synthesis, the way the methyl shifts reactivity down the line, or the balancing act of maintaining batch consistency. People sometimes underestimate how knowledge of process influences the final product. Diethyl 5-methylpyridine-2,3-dicarboxylate gives us a chance to demonstrate why close control and real-time adjustments matter.
It’s not just an abstract intermediate; its functional groups gift the molecule a handle for downstream customizations. The carboxylate esters invite chemists in pharmaceutical, agrochemical, and specialty materials sectors to dig deeper into synthesis. Each time a customer requests this compound, their chemists count on our ability to present a product that won’t act up under stringent conditions. We’ve seen that not all suppliers get this right—small changes in batch conditions, impurities, or even shipping times can mean headaches for formulation labs downstream.
Our plant monitors every step, from the raw material checks to the final distillation, so we can confirm a consistent melting range, keep water content under tight control, and minimize traces of related pyridine isomers. Analysts sometimes find this level of detail obsessive, but we find pride in the feedback: cleaner NMR spectra, no stubborn peaks, and reactions that finish as predicted. This speaks not only to the skill of the crew but also to the time spent mapping out failure points in the process.
A chemical’s model number alone will not convey what matters to a synthetic chemist or pilot plant technician. Over the years, we’ve found serious practitioners care about more than just assay. They ask about the route we use, byproducts, color, and handling properties. Our standard synthesis routes avoid hazardous reagents where possible, cutting down on side reactions and unwanted residues. The material typically exits our process as a pale straw-colored liquid, with assay confirmed by both HPLC and GC, and we include full multi-spectrum analysis in our shipment documents.
On the bench, this means less time troubleshooting purification, a more predictable batch yield, and fewer unknowns during subsequent transformations. Labs working with this molecule for heterocycle derivatization or as a masked dicarboxylate frequently get better recoveries with fewer purification steps because we control process-side contamination tightly. No half-promises—just feedback from teams running hundreds of trial reactions and performance checks.
Our production logbooks are filled with requests from researchers and process chemists looking to open new synthetic routes or optimize existing ones. Diethyl 5-methylpyridine-2,3-dicarboxylate has played a central role in emerging pharmaceutical scaffolds, crop protection candidates, and advanced material prototypes. Its twin ester groups allow for tandem coupling, hydrolysis, or selective reduction, and the methyl substituent changes sterics and electronics, sharpening selectivity in cross-coupling or cyclization reactions.
What we’ve witnessed firsthand is that real innovation in chemical manufacturing depends on feedstocks that behave predictably. Several of our long-term partners switched to our supplies after lab trials proved previous lots from other sources triggered inconsistent reactivity—sluggish yields one month, byproduct formation the next. We’ve responded to those experiences by tailoring not the generic “quality” but the practical outcome: minimal water, tight isomer ratios, clarity that persists through transit, and guaranteed reproducibility run-to-run.
On paper, small differences between similar pyridine dicarboxylate esters might seem negligible. In practice, the methyl group at the 5-position on the pyridine ring doesn’t merely tweak the structure; it changes reactivity and applicability. Our team has tested analogs like diethyl pyridine-2,3-dicarboxylate and its 5-unsubstituted cousin. This specific methylation often leads to greater selectivity in regio-controlled functionalizations, less byproduct formation in certain coupling reactions, and distinct solubility shifts that make downstream handling easier for both us and our clients.
Plant personnel who’ve spent years fine-tuning product lines will tell you that not all methylated pyridines behave equally. Synthesis of Diethyl 5-methylpyridine-2,3-dicarboxylate brings some challenges: careful phase separation, precise temperature profile, and timing distillation fractions. We maintain vigilance across the entire operation to prevent unwanted hydrolysis and methyl migration, which can introduce off-target byproducts. So, the “one-pager” comparison with others in the same family tends to ignore the operational complexity and hands-on know-how built into every batch.
Our commitment as a direct producer goes beyond a technical data sheet. Outsiders sometimes fail to grasp the difference between a true manufacturing operation and a trading company. Traders move commodities, but chemical production includes the hours spent cleaning reactors, calibrating GC columns, and catching rare failures before they travel downstream. We choose to keep production in-house, because farmed-out batches often mean a loss of direct control, flaky traceability, and awkward surprises for clients with specialized requirements.
Seasons, shipping conditions, storage setups—all impact final quality. Our warehouse logs every environmental factor, and our team maintains a chain of custody from synthesis through packaging. Real-life incidents—summer heat spikes, winter freezing, even power outages during runs—have shaped protocols that keep every shipment within declared specifications. We recall a case a few years ago, when a client’s network noticed a subtle difference in spectral purity after changing market suppliers. By retracing hands-on production notes, we quickly identified a source—residual phase impurities from a storage tank abroad—and ramped up our monitoring as a result. Direct production keeps learning loops closed and client confidence steady.
Many discussions in industry focus on theoretical purity and standard numbers. In use, Diethyl 5-methylpyridine-2,3-dicarboxylate’s reliability and processability have quietly enabled real advances. Chemists using it as a precursor for substituted pyridine rings tell us that batch failures usually come from overlooked contaminants or unstable batches, not theoretical impurities. Our plant’s real advantage comes from feedback loops between operational staff, R&D, and external users—a quick call from a senior process chemist often spurs new analytic routines or tweaks in storage and shipping conditions the following week.
We pay particular attention to residual solvents, unintended ester hydrolysis, and color changes, because over the years even minor overlooked shifts led to delayed downstream processing for clients. Experience running large volumes has created a mental database of what to watch out for—organic phase clouding, faint off-odors, or slow clarity loss—that doesn’t show up on generic specs. Each lot that leaves our plant carries not just a certificate but a history of process checks shaped by hundreds of process runs and real troubleshooting. That’s why so many partner labs stick with us through program cycles, new candidate launches, and scale-up to pilot or production scale.
The industry trends toward higher purity, green chemistry, and precision synthesis. We’ve invested not just in equipment but in people—analytical chemists, batch operators, and maintenance techs who keep the process humming. Upgrades over the years include in-line GC and real-time infrared monitoring, automatic pH adjustment, and sealed transfer lines to minimize environmental exposure and batch loss. These aren’t decorative improvements—they translate into shorter lead times, lower batch rejection, and predictive maintenance.
We’ve seen commercial imitators try to keep up by rebranding or blending to meet specs, but process transparency makes a difference. From temperature-controlled storage to frequent requalification of analytical standards, our lab staff are on the floor cross-checking real-world performance, not reviewing it through a bureaucratic chain. Clients benefit through honest communication of risks, robust shipment records, and accessibility at every stage of the purchase and use process.
A 2022 collaboration with a pharmaceutical customer pushed us to tighten color control and residual solvent specs after their downstream catalysts showed batch sensitivity. We responded by revising the distillation cut, fine-tuning gas sweep rates, and publishing updated process analytics for that year’s shipments. Yields moved up, complaint rates fell, and follow-up trials confirmed better performance in a challenging cyclization step. These improvements didn’t come from guesswork—they built on comprehensive process monitoring and frank data reporting.
In agriculture development trials, partners have commented on the usefulness of our chromatograms, which make it easier to trace even ppm-level byproducts that crop up in later oxidation or reduction reactions. Our willingness to share complete analysis data—UV-vis, NMR, GC-MS, and moisture analysis—for each batch has reassured countless pilot plants bracing for regulatory compliance audits. Sharing lessons from traceability and analytic rigor creates a shared standard that keeps the broader field advancing responsibly.
Global supply change disruptions brought raw material shortages and shifting delivery expectations. Our approach involved building buffer stocks of key inputs, investing in supplier relationship management, and moving toward localized source redundancy. We fine-tuned logistics chains—implementing real-time GPS shipment tracking, continuous environmental monitoring, and modular storage containers to adapt to different climates and transit distances. These strategies shielded our output from the rhythm of global bottlenecks, giving our customers consistent access to critical intermediates.
Sustainability matters too. Diethyl 5-methylpyridine-2,3-dicarboxylate’s production can create waste streams if left unchecked. We responded by incorporating solvent recovery, intermediate recycling, and process water minimization. Waste heat from exothermic steps supports on-site needs, shrinking our operational footprint. Partnerships with external recyclers further ensure nothing leaves the site as unmanaged waste. These choices reflect a long-term commitment, not just to compliance but to leadership in responsible manufacturing.
Every kilogram of Diethyl 5-methylpyridine-2,3-dicarboxylate shipped reflects not only a chemical product but a history of continuous improvement, operational discipline, and clear-eyed adaptation to customer feedback. In this domain, expertise grows on the production line as much as the research lab bench. Technicians, operators, and analysts shape the reliability and reputation of every batch; their vigilance stands behind every certificate analysis we issue.
We measure success not by box-ticking compliance, but by the repeated satisfaction of clients who see real value in transparent reporting, proactive solutions, and open feedback channels. Years of direct production taught us to expect the unexpected—and to respond with agility and candor. As the world sharpens its focus on process chemistry’s role in better health, food security, and advanced materials, we stand ready to supply Diethyl 5-methylpyridine-2,3-dicarboxylate with the reliability, integrity, and insight that only a manufacturer who lives and breathes the craft can deliver.