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HS Code |
725586 |
| Iupac Name | 1,2,3,4-tetrahydro-9-methylcarbazol-4-one |
| Molecular Formula | C13H13NO |
| Molar Mass | 199.25 g/mol |
| Cas Number | 14226-36-9 |
| Appearance | Off-white to light yellow solid |
| Purity | Typically ≥98% |
| Melting Point | 148-152°C |
| Solubility | Slightly soluble in water; soluble in organic solvents |
| Smiles | CN1C2=CC=CC=C2CC(=O)CC1 |
| Inchi | InChI=1S/C13H13NO/c1-14-10-6-2-4-8-12(10)7-5-11(15)9-13(14)3/h2,4,6,8H,5,7,9H2,1,3H3 |
| Synonyms | 9-Methyl-1,2,3,4-tetrahydrocarbazol-4-one |
| Storage Conditions | Store in a cool, dry place; keep container tightly closed |
As an accredited 1,2,3,4-Tetrahydro-9-Methylcarbazol-4-One factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Amber glass bottle, screw cap, 25 grams, tamper-evident seal, white printed label displaying chemical name, formula, hazard symbols, and lot number. |
| Shipping | **Shipping Description:** 1,2,3,4-Tetrahydro-9-Methylcarbazol-4-One should be shipped in tightly sealed containers, protected from light and moisture. It must comply with all relevant hazard and transportation regulations. The package should be labeled with the chemical name, CAS number, and appropriate hazard warnings. Handle and store in accordance with SDS guidelines. |
| Storage | Store 1,2,3,4-Tetrahydro-9-Methylcarbazol-4-one in a tightly sealed container, in a cool, dry, and well-ventilated area away from direct sunlight and sources of ignition. Keep away from incompatible materials such as strong oxidizers and acids. Ensure proper chemical labeling and avoid moisture exposure. Follow standard laboratory safety protocols and local regulations when handling and storing this compound. |
Applications of 1,2,3,4-Tetrahydro-9-Methylcarbazol-4-One in Industrial ManufacturingAs a focused manufacturer of specialty carbazole derivatives, we supply 1,2,3,4-Tetrahydro-9-Methylcarbazol-4-One for industrial clients across multiple advanced chemical sectors. Here, we detail specific downstream application scenarios where this intermediate plays a critical, well-established role in production workflows, listing typical usage parameters, regulatory requirements, and real-world examples of end-use products. 1. OLED and Display Panel Intermediate SynthesisIn electronic material manufacturing, advanced carbazole derivatives provide core building blocks for organic light-emitting diodes (OLED) used in high-performance display panels. 1,2,3,4-Tetrahydro-9-Methylcarbazol-4-One enters the synthetic pathway for emissive layer materials, where its structure promotes charge carrier mobility and thermal stability. Direct integration yields precursors for emitter or hole-transport layers, supporting the fabrication of next-generation flat-panel televisions, smartphones, and automotive displays. Industry compliance standards
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2. Pharmaceutical API Building BlockIn medicinal chemistry, the compound serves as a precursor for synthetic pathways leading to select heterocyclic drug substances. Its carbazole framework contributes to lead molecule libraries for CNS therapies and oncology actives. Strict control in process integration and traceability supports clinical and commercial-scale API manufacture, ensuring input quality for global regulatory submissions and batch consistency through validation. Industry compliance standards
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3. Specialty Dye and Pigment Manufacturing1,2,3,4-Tetrahydro-9-Methylcarbazol-4-One functions as a backbone intermediate for carbazole-based dyes and pigments, where its nitrogen heterocycle imparts excellent chromophoric stability and penetration. Industrial dye synthesis employs this compound for high-performance pigments destined for specialty inks, security printing, and functional coatings demanding lightfastness and chemical resistance. Industry compliance standards
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4. Polymer Additive Synthesis in Engineering PlasticsManufacturers of engineering resins use this intermediate to introduce N-heterocyclic stabilization sites within custom polymers, targeting enhanced thermal, oxidative, and UV resistance. Its integration supports the development of high-performance plastics for automotive, aerospace, and electronic component applications where durability under aggressive process and field conditions must meet precise industry expectations. Industry compliance standards
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5. Organic Photovoltaic Material PrecursorAs renewable energy device technology matures, carbazole-based frameworks play a growing role in organic photovoltaic (OPV) architectures due to favorable charge transfer characteristics. This intermediate is used in the custom synthesis of donor-acceptor materials for OPV cell active layers, facilitating efficiency gains and material lifetime improvements in targeted solar panel constructions. Industry compliance standards
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From years inside the factory where raw materials turn into practical solutions, we see firsthand the demand for carbazole derivatives push higher year after year. 1,2,3,4-Tetrahydro-9-Methylcarbazol-4-One bridges a critical gap in chemical synthesis where stability, accessibility, and reactivity count. Every step in its production line speaks to challenges only a manufacturer contends with: tight control of reaction conditions, impurities locked down to trace levels, no shortcuts taken on drying time or packaging. That’s how we help formulators, R&D teams, and development chemists build forward-looking processes that need more than a generic intermediate.
Our output of 1,2,3,4-Tetrahydro-9-Methylcarbazol-4-One comes in both high-purity and standard-industrial forms. Years of feedback confirm that not all projects require the same profile. Some partners mix our material into electronic-grade components, where even faint trace metal or water contaminants upset crucial yields. Other customers use our industrial grade in batch reactions where efficiency and cost balance each other. Both forms undergo the same rigorous crystallization and screening steps; the difference lies in the added purification cycles and analytical validation. This is not just a matter of paperwork. More than once, labs have noticed tiny unknown peaks in lesser batches, often leading them down troubleshooting trails that waste days. By tightening our columns and drying under vacuum for hours longer than the baseline requires, we have learned to stay ahead of those pitfalls, and that translates for the formulator into consistency lot after lot.
Plenty of carbazole derivatives crowd the market shelf, but not every one responds the same in catalytic reactions or downstream modifications. Years of pilot work confirm that the tetrahydro ring system in this molecule offers a cleaner slate for hydrogenation and acylation. That opens doors in custom synthesis—especially in the pharmaceutical and electronic materials fields—where byproducts make or break a scale-up. We’ve seen innovators get stuck with overly aromatic carbazole bases, which fight back in reductive amination or coupling steps without major catalyst overloads and waste disposal. By contrast, this gently saturated core brings flexibility that pure aromatic bases cannot easily replace.
Over the past decade, as OLED development exploded, so did the hunt for new intermediate chemistries. Our molecule found its way into polymers and device prototyping labs not by marketing, but by real-world problem solving. Chemists appreciate that the methyl group at the 9-position provides enough electron-donating character for tuning electronic effects, but doesn’t compromise the baseline chemical stability during storage and processing. This subtle difference plays out in small but vital yield improvements across long, multi-step synthetic sequences.
One of the least discussed aspects in specialty intermediate manufacturing remains the day-to-day diligence with process safety. From day one, our team has navigated recurring process exotherms and the unpredictable “tricky intermediates” that crop up if temperature profiles slip even a few degrees. Scaling from gram reactions through kilo to plant reactors brings out challenges that pure scientists rarely see—solvent retention, color formation, unexpected crystallization delays. We take pride in sidestepping these by developing protocols tuned not just for laboratory purity but for plant robustness, knowing that every hour of downtime impacts dozens of jobs and customer schedules downstream.
Beyond process performance, our emphasis on lot traceability often comes up during audits. Not every supplier tracks each drum or pail from charge-in through package-out with the same discipline. But for this intermediate, trace back has mattered before: during an industry-wide push for impurity compliance in pharma syntheses, we uncovered a minute byproduct that hadn’t raised flags before the customer’s own advanced analytics caught it. Rapid communication and willingness to deep dive into batch records enabled us to adjust purification, resolve the issue with a new lot, and avoid a delay for a key application. Such episodes underscore the value of manufacturing rooted in openness instead of simply meeting paperwork requirements.
What truly separates this product in field use is not just standard chemical descriptors or purity numbers. We have seen R&D chemists share frustration over batch-to-batch variation, slow dissolution, or unanticipated side reactions that force late-stage process changes. Our hands-on role puts us in the loop early during product trials, which means we spot the warning signs industries less involved might overlook. For example, a company experimenting with dye intermediates noticed off-color solutions and loss of performance. Direct dialogue led us to improve crystallization filtering, drop residual organic bases, and deliver a brighter, more consistent end result.
In pharma labs, feedback often circles back to purity and ease of handling. Our plant avoids excess milling or aggressive drying that can damage crystalline form or cause static. Such details may escape top-line process sheets but make a measurable difference during scale-up or formulation as any production chemist knows. Our approach favors a measured, methodical process over shortcuts that save a few hours or kilograms upfront but cost much more in downstream adaptation and QA headaches.
Our 1,2,3,4-Tetrahydro-9-Methylcarbazol-4-One finds a natural fit in a variety of fields—most visibly pharmaceuticals, specialty dyes, and rapidly growing organic electronics. Some clients employ it as a core building block in heterocyclic assembly, appreciating how its moderate reactivity enables transition-metal-catalyzed coupling without excessive byproduct formation. In OLED prototyping, its scaffold positions well for substitution and ring extension, contributing to the intense competition for higher-efficiency, longer-life devices.
Each application field brings its own demands for purity profile, handling characteristics, and supply continuity. Rather than guessing at what customers might want, we draw directly from their feedback and trial batches. Over the years, companies have told us about bottlenecks with other carbazoles due to poor shelf stability or tolerance for moisture. Our design focus on controlled drying and protective packaging answers that directly. For dye synthesis, for example, slight differences in polymorph content or residual organics can throw off color yield or lightfastness—a problem we’ve been able to head off through constant adjustments in our crystallization and packaging protocols.
Those who have never walked the shop floor often overlook the practical roadblocks that make or break a chemical’s day-to-day utility. Our plant has tackled the full range: longstanding issues like persistent color bodies that crop up only at scale, to newer complications like raw material purity swings from upstream suppliers forced by global price shocks. Open communication with other manufacturers and tight internal QA have shielded our own customer base from those fluctuations, but the lesson remains: it takes more than keeping a spec on file to ensure stable product.
At one stage, a spike in raw material impurities prompted us to add real-time monitoring and increase pre-treatment steps, even though these added complexity. Looking back, that move kept us clear of downstream trace contaminations that might have left whole batches unusable. For us, such labor-intensive adjustments are part of the manufacturer’s contract—delivering more than what the paperwork promises, anticipating the unexpected.
Resolving process bottlenecks demands specialized technical skills from our team. The tetrahydro-9-methylcarbazol-4-one synthesis involves careful hydrogenation control and fine-tuned crystallization. Early on, incomplete conversion caused a faint odor that threatened user acceptance. Rather than masking the problem with additives, our technical staff traced it back to reactor temperature imbalances and made the necessary engineering upgrades. Since then, feedback from formulation chemists confirmed the improvement not just in appearance but in long-term batch stability.
Manufacturing this intermediate doesn’t just require adherence to procedures but a willingness to learn from every deviation. Analytical trends, once considered ‘noise’, may lead to core improvements. For this reason, all product batches receive thorough testing using modern chromatography and spectroscopic techniques. Methods are re-validated periodically in response to consistent customer requests or regulatory guidance.
Partners in the electronics sector have shown appreciation for the full trace analysis reports we provide. Deliveries include impurity breakdowns for metals and solvents at levels below standard regulatory requirements. One technical manager pointed out that such data reduced their incoming inspection workload by over half, and let their R&D teams focus on innovation rather than re-testing raw materials. It’s practical outcomes like these that shape how we engineer every aspect of production.
Technical staff and plant operators meet regularly after each campaign to review data from every lot. Even successful lots come under the same microscope, with process improvements fed back into subsequent production runs. Consistency achieved over months and years only comes from this cycle of review and adaptation, never from leaving protocol unchecked or assuming the minimum spec is ‘good enough’.
In the world of specialty chemicals, large and small releases into the environment make news headlines, not just legal headaches. Our own plant’s record with handling and storage of intermediates like 1,2,3,4-Tetrahydro-9-Methylcarbazol-4-One reflects decades of incremental improvements: closed-loop nitrogen handling, full secondary containment, and waste solvent reprocessing as standard, not afterthoughts. Years ago, an audit flagged the need for improved on-site vapor monitoring. Instead of patching over the weak point, we invested in full deployment of new sensors throughout both storage and reaction areas. That level of direct accountability protects not just our staff, but the communities around the plant.
Worker training remains a primary focus. All operators not only undergo initial hazard training but participate in refresher drills when protocols adjust or new equipment comes online. This interviewing of plant workers regularly has uncovered practical hazards—such as awkward drum tipping or subtle static build-up—addressed not with lectures, but by tweaking equipment or upgrading gear. The firsthand perspectives of those actually running the process guide changes in real time.
Events in the past few years reminded the industry how thin the margin is between normal stock and shortage. Floods, power outages, and sudden changes in logistical rules put growing pressure on material sources, and many customers have come to value our commitment to direct manufacturing. Since we hold inventory in secure, climate-controlled facilities, and source core starting materials only from vetted regional suppliers, customers see their own supply shocks minimized. With real manufacturing capacity in place, not just paper contracts, we can increase output rapidly during spikes.
During a recent supply crunch, several downstream users shifted to dual-sourcing strategies. They saw improved on-time arrival and lower freight costs by pairing our consistent output with one local emergency supplier. Sharing updates on transit times and real-world handling problems with our logistics team kept deliveries on target, even as international bottlenecks and custom paperwork delays affected many in the field.
Being the original manufacturer means we get the first call, not just for new orders but for technical follow-up. Over the years, customers have often shared process tweaks or formulation ideas drawn from their own front-line work. These exchanges move both parties forward. Each question about a stubborn crystallization or a solubility limit sharpens our own response, not only for that client, but for everyone down the line. Even as remote troubleshooting and data sharing become easier, nothing replaces the insights gained from walking a customer through their process or troubleshooting a reactor line together.
Technical support in our company means ongoing feedback loops. When an engineer or chemist in a client’s facility runs into trouble, they expect open and practical advice. Our job includes proposing both immediate fixes—tuning solvents, adjusting temperature profiles—and long-term adaptations. Solutions sometimes require tweaking our own process inputs, or adjusting drying cycles based on climate or storage feedback from the end user’s facility. Such small details separate responsive manufacturing from generic supply.
The future of specialty chemistry lies in genuine partnership between manufacturing and application. Few products illustrate this better than 1,2,3,4-Tetrahydro-9-Methylcarbazol-4-One. Through painstaking attention to each campaign, direct investment in plant capability, and respect for feedback from customers, we have watched this intermediate expand its role far beyond its original application. Whether used as a starting material in medicinal chemistry, a building block in optical materials, or a core component in new dye systems, its performance has been shaped by the real problems and victories of hands-on chemists and engineers.
Commitment travels from the shop floor to the finished product; staying true to best practices in every drum or flask leaves a stamp on our reputation that outlasts any single order. Our handling of this compound over the years reflects a practical priority: building reliable output not through flash or shortcuts, but by steady adaptation and openness to learning from every batch and every customer.
As the industry’s needs and technologies evolve, we keep building alongside. Our journey with 1,2,3,4-Tetrahydro-9-Methylcarbazol-4-One has shown the unglamorous but vital strength of manufacturing grounded in deep process knowledge, trust earned in crisis as well as routine, and constant readiness to improve—not just react. That’s how we plan to keep bringing real value year after year, to every chemist, engineer, and manager depending on this critical intermediate.