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HS Code |
983238 |
| Cas Number | 503-92-4 |
| Iupac Name | 1,2,5,6-Tetrahydropyridine |
| Molecular Formula | C5H9N |
| Molar Mass | 83.13 g/mol |
| Appearance | Colorless liquid |
| Density | 0.891 g/cm³ |
| Boiling Point | 123-124 °C |
| Melting Point | -59 °C |
| Flash Point | 23 °C (closed cup) |
| Solubility In Water | Miscible |
| Refractive Index | 1.447 |
| Pubchem Cid | 11053 |
As an accredited 1,2,5,6-Tetrahydropyridine factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | The 1,2,5,6-Tetrahydropyridine is supplied in a 100 mL amber glass bottle with a secure, leak-proof screw cap. |
| Shipping | 1,2,5,6-Tetrahydropyridine should be shipped in tightly sealed containers, away from heat, sparks, and sources of ignition, as it is flammable and potentially hazardous. Packaging should comply with relevant chemical transport regulations. Proper labeling and documentation are essential, and handling should ensure protection from moisture and incompatible substances. |
| Storage | **1,2,5,6-Tetrahydropyridine** should be stored in a tightly sealed container, under an inert atmosphere such as nitrogen or argon, protected from light and moisture. Store at a cool temperature, ideally in a dedicated flammable chemicals cabinet away from sources of ignition and incompatible substances such as strong oxidizers. Ensure adequate ventilation and clear chemical labeling for safe identification and handling. |
Applications of 1,2,5,6-Tetrahydropyridine in Industrial Manufacturing1,2,5,6-Tetrahydropyridine is a key intermediate in several high-value industrial production lines, with demanding requirements for purity, process stability, and product consistency. As a direct manufacturer, we supply this raw material to critical segments where technical parameters and compliance are strictly enforced by downstream sectors. 1. Pharmaceutical Intermediate for Gefitinib and Related APIs1,2,5,6-Tetrahydropyridine plays an essential role as a building block in the synthesis of pharmaceutical intermediates, especially in the preparation of active pharmaceutical ingredients like Gefitinib. The material undergoes N-alkylation, oxidation, and further molecular transformations in the presence of certified solvents and catalysts under GMP-validated conditions. Formulators require tight control of residual solvents and specific isomer ratios to comply with regulatory submissions. Industry compliance standards
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2. Catalyst Precursor in Advanced Polymer Synthesis1,2,5,6-Tetrahydropyridine functions as a ligand and intermediate in the production of specialized organometallic catalysts for high-performance polymerization reactions. Manufacturers employ this compound to construct catalyst complexes used in controlled radical and ionic polymerization processes. Strict process monitoring ensures the elimination of undesired ring-opened or oxidized byproducts, as these impurities directly impact polymer chain lengths and end-use properties. Industry compliance standards
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3. Precursor for Agrochemical Active Compound Synthesis1,2,5,6-Tetrahydropyridine serves as a core intermediate in the fabrication of select pyridine- or piperidine-derived agrochemical actives. Synthesis routes incorporate this compound in cyclization and N-alkylation steps, under strictly monitored conditions to prevent contamination and cross-reactions that affect field application properties. Comprehensive traceability from batch intake to final concentrate blending is mandatory for regulatory audits. Industry compliance standards
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4. Fine Chemical Intermediate for Flavors and FragrancesProducers use 1,2,5,6-Tetrahydropyridine to manufacture nitrogen-containing aroma compounds and flavor enhancers—specifically targeting applications where trace impurity control and food-grade compliance are mandatory. It introduces unique notes and chemical reactivity in Maillard reaction mimics and in synthetic pathways for roasted, toasted, or nutty aromatic profiles. Each lot must undergo extensive batch clearance testing to satisfy consumer safety protocols. Industry compliance standards
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5. Precursor in Advanced Materials for Electronic ChemicalsElectronic material producers incorporate 1,2,5,6-Tetrahydropyridine in the custom synthesis of intermediates for electronic-grade polymers and resist materials, particularly for lithography and circuit packaging. Stringent requirements apply regarding trace element content and ionic impurity control, as any deviation can degrade downstream device performance or yield. All lots undergo pre-shipment certification under tailored quality agreements with end clients. Industry compliance standards
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Competitive 1,2,5,6-Tetrahydropyridine prices that fit your budget—flexible terms and customized quotes for every order.
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In our daily work as direct manufacturers of specialty chemicals, few molecules present both challenge and opportunity like 1,2,5,6-Tetrahydropyridine. This compound, sometimes overlooked outside advanced research laboratories, emerges as a linchpin in the synthesis of complex pharmaceuticals, fine chemicals, and functional materials. Drawing from hands-on experience, we see the full weight of decisions—equipment calibration, solvent selection, storage standards—each time we move from batch to batch. It’s not just another name in a catalog, it’s a delicate building block whose real value shows up in the hands of seasoned chemists who need consistency and reliability.
Our approach to making 1,2,5,6-Tetrahydropyridine typically revolves around controlling temperature, moisture, and purity, because even slight variations can shift the product profile. Its structure, defined by partial saturation of the pyridine ring at specific sites, contributes to unique reactivity—especially in cyclization steps, or as a scaffold to introduce functional groups in more elaborate molecules. We don’t treat this product like a commodity. Each lot undergoes critical analytical checks. We measure moisture content, GC purity, stabilization—parameters that directly impact performance downstream. Clients often ask about the nuances between this and other tetrahydropyridine isomers. The answer starts with subtle reactivity shifts caused by position and number of saturated bonds. For 1,2,5,6-Tetrahydropyridine, this means different hydrogenation pathways and less basicity compared to the fully unsaturated ring.
Consistency isn’t simply a slogan—it forms the basis for every contract we secure. Our typical lot of 1,2,5,6-Tetrahydropyridine comes with GC purity above 98 percent, typically closer to 99 percent. Impurities don’t just waste time—they wreak havoc on downstream transformations. We screen for peroxides, residual starting materials, and even microlevels of metallic contaminants. Any hint of instability, and we know purification steps must lengthen, compounding time and risk.
The boiling point rests at around 170 degrees Celsius, though batch-to-batch drift occurs if solvents hold too much moisture or atmospheric oxygen creeps in during work-up. That’s why our filling lines run under inert gas. Each drum, whether glass or select polymer inner linings, gets flushed and sealed to maintain integrity. We prefer stainless steel over mild steel, as the latter can promote trace corrosion—particularly over prolonged storage or transit in humid environments.
Our warehouse teams keep a close eye on temperature and packaging condition. Any discoloration or odor note signals an immediate quarantine. Temperature exposure, even for brief periods, sometimes induces degradation. So we fix upper thresholds and monitor actual on-site conditions. Transport also brings its own set of headaches. Regulations for semi-volatile amines differ sharply across regions, not just between countries but even within a single jurisdiction as enforcement shifts. Our logistics partners only move products with validated handling records.
For research and industrial customers, our shipping units range from small sealed bottles to larger drums. We avoid large intermediate totes for this molecule. In our experience, chemical purity drops sharply if the material sits in oversized containers exposed to headspace for too long. Labels go on with human inspection—no shortcuts. Every shipment includes a recent QC report, not just a batch certificate grabbed from a database.
This isn’t a question buyers should answer in isolation. Tetrahydropyridine chemistry offers several isomers, each with slightly different behavior. For instance, fully hydrogenated piperidine focuses on basicity and sometimes lacks the double bond reactivity required for cycloaddition strategies in synthesis. By contrast, unsaturated pyridine often proves too harsh in reaction scope, producing unwanted side reactions. We have seen research formulations improve their yield and selectivity when swapping in 1,2,5,6-Tetrahydropyridine as a core intermediate. The partial saturation finds a sweet spot between nucleophilicity and stability, especially in the early steps of agrochemical or pharmaceutical workflows.
We’ve worked with chemists who tried to adapt protocols from piperidine but faced unexpected failures—overalkylation, stray cyclization, hydrolysis products—only to find they could solve these issues by making a precise isomer selection. Our field feedback loop helps guide both R&D and production teams to focus on these case studies, and we regularly update our process notes based on recent outcomes.
Across modern drug synthesis routes, 1,2,5,6-Tetrahydropyridine finds a niche as a precursor to several heterocyclic scaffolds. We have seen it incorporated into lead structures for CNS-active compounds, advanced polymer backbones, and even high-value catalysts. On the plant floor, the material’s responsiveness to electrophiles—especially compared to other isomers—offers an edge in achieving regioselective transformations. Tight control over amine basicity coupled with resistance to full hydrogenation means customers use it where piperidine cannot deliver.
Its use isn’t restricted to pharma; several of our bulk clients rely on it for specialty coatings, electronics intermediates, and fine fragrance synthesis. In flavors and fragrance chemistry, the subtle difference in ring structure translates to entirely new aroma notes or improvement in the stability of final blends. Here, impurity masking and competitive degradation often push demand for higher-purity lots that only a direct manufacturer can offer—third-party mixers simply can’t replicate this curve because they lack complete process control.
Structurally, piperidine, pyridine, and the family of tetrahydropyridine isomers fall within a broad range, but functional behavior sets them apart. Piperidine (fully saturated) releases more heat on addition of acids and often introduces more basicity into formulations. For 1,2,5,6-Tetrahydropyridine, we see a more moderate response both in reactivity and in stability, which helps when process chemists want to manage both yields and byproduct profiles. It also tolerates broader reaction conditions without immediate polymerization or ring opening, so scale-ups move faster. Unsubstituted pyridine, on the other hand, proves more reactive but triggers more hazards, including air sensitivity and off-gassing in larger runs. We find that our industrial partners often ask for our technical advice specifically to avoid the classic pitfalls of selecting the wrong backbone during process scale decisions.
Comparing to the 1,2,3,6-tetrahydropyridine isomer, the relative positions of double bonds produce enough electronic difference to disrupt identical synthetic plans. Our technical service teams regularly help design altered routes to take advantage of each isomer’s strengths. Some clients, aiming for high throughput, have converted from older isomers to our 1,2,5,6- variant because it enables simpler purification and less waste solvent. That kind of process improvement saves both time and substantial raw material cost.
This molecule’s partial hydrogenation means batch reactions can stall or overshoot. Early in our scale-up work, we faced multiple incidents of batch-to-batch color variations and trace peroxide formation linked to insufficient gas flow calibration. Rather than simply modify protocols, we invested in better inline monitoring and switched to catalytic systems less prone to over-hydrogenation. Our best yields now arise from carefully tuned pressure and temperature cycles, and by holding the product under an inert blanket from reactor through to final packaging. Our multi-year reliability studies indicate a marked reduction in shelf-life variance following these procedural changes.
Contamination remains a constant threat—not just in-reactor, but also during storage. Small process lapses (inadequate cleaning, older gaskets, or poor seal integrity) routinely introduce ppm-level instability. We addressed these by revamping all transfer lines and switching all containers above 1 liter to lined steel or glass. Dissolved oxygen and surface deposits, often underappreciated by non-manufacturers, lead to early product failings, so we run routine peroxide tests (both batch and spot-testing during decanting). We shared case studies of avoidable degradation with our clients to help them design better in-house protocols, especially when their own warehousing falls short of ideal storage standards. Working as a direct producer rather than a distributor means we own every part of this process up to client receipt—and our willingness to troubleshoot after shipment goes beyond the usual industry norms.
Handling semi-volatile amines always raises safety flags in an industrial setting. We learned early that adequate ventilation, strict access controls, and personal monitoring devices kept workplace hazards in check. Some jurisdictions call for local exhaust ventilation and continuous air monitoring; we comply and encourage buyers to do the same. Unlike distributors who sometimes resell with little real knowledge of risks, we see the direct effect of plant safety audits and near-miss reports. Every solvent, every drum, every transfer counts.
On the regulatory front, classification as a hazardous material limits transport flexibility. Our teams focus on faster turnover to minimize time-in-transit, and we’ve pushed back against the trend of larger, more “efficient” shipping containers—those only make trace contamination or ambient exposure more likely. Each time transport rules evolve, our compliance group updates documentation and shipper partners instantly, and we regularly share compliance changes with our buyers to keep their receiving departments ahead of the curve.
We also pay attention to environmental impacts. Effluent from production is closely tracked, and we’ve retrofitted reactor and cleaning loops to reduce VOC emissions. Solvent recovery ratios have improved dramatically as we switched to closed-system transfers, motivated partly by tougher rules and partly by our drive to preserve both environment and reputation. Outside audits of our processes, drawn from both local inspectors and multinational partners, drive steady improvement and rigorous adherence to sustainable practice.
No specialty chemical remains static in its use or in customer expectations. We engage with academic and industrial researchers both to anticipate changes in synthetic routes and to learn new applications for 1,2,5,6-Tetrahydropyridine. Many university groups share analysis of byproducts in their latest coupling reactions. We gain new insight each time, from unexpected NMR contaminants to clever stabilization additives for long-term storage. Feedback cycles with both multinational pharma and independent firms lead us to tweak process conditions, expand analytical testing, and, at times, re-design plant infrastructure for new reaction scales or application requirements.
Working as a direct producer, our technical teams run side-by-side with production. Mistakes become lessons, not hidden paperwork. New requirements come directly from the market—demand for higher purity, stricter moisture control, or specialized packaging for regulatory submission. Several recent projects saw us pilot unique micro-lot batches for clients seeking custom isotopic labeling or trace-impurity analysis, sometimes in direct collaboration with end-user research teams. In building trust, we prioritize transparency. Our clients often invite us to walk their floors, inspect their own in-house controls, and troubleshoot protocols together. These partnerships help both sides reduce risk, and keep our 1,2,5,6-Tetrahydropyridine offering tuned to the realities of commercial and advanced synthesis.
The modern marketplace for fine chemicals reflects today’s demands: traceability, sustainable processes, and relentless quality. 1,2,5,6-Tetrahydropyridine stands at the intersection of tradition and innovation—seeing renewed use both in retooled legacy pharmaceuticals and the latest generations of advanced materials. From our position on the ground, direct manufacturing control, robust in-house analysis, and open customer engagement set apart the producers who can genuinely assure performance and security in supply. Each batch, each improvement, reinforces our commitment to this demanding yet rewarding field.
