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HS Code |
803821 |
| Name | Rotundine |
| Alternative Name | L-tetrahydropalmatine |
| Chemical Formula | C21H25NO4 |
| Molecular Weight | 355.43 g/mol |
| Cas Number | 10097-84-4 |
| Appearance | White crystalline powder |
| Solubility | Slightly soluble in water, soluble in ethanol |
| Source | Extracted from Corydalis yanhusuo |
| Usage | Analgesic and sedative |
| Melting Point | 153-154°C |
As an accredited Rotundine factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | White, sealed HDPE bottle labeled "Rotundine, 100g" with lot number, CAS 81-74-9, purity, hazard symbols, and manufacturer details. |
| Shipping | Rotundine is shipped securely in sealed, clearly labeled containers, compliant with chemical safety regulations. Packaging provides protection from moisture, light, and physical damage. Material Safety Data Sheets (MSDS) accompany each shipment. Shipments are tracked and handled by authorized carriers, ensuring safe and efficient delivery to laboratories or research facilities. |
| Storage | Rotundine should be stored in a tightly sealed container, protected from light, moisture, and air. Keep it in a cool, dry place at room temperature, ideally between 2–8°C (refrigerated if recommended). Ensure it is stored away from incompatible substances, such as strong oxidizing agents. Proper labeling and secure, restricted access are advised to prevent unauthorized use or accidental exposure. |
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Purity 98%: Rotundine with 98% purity is used in pharmaceutical formulations, where it ensures consistent analgesic efficacy. Melting Point 191°C: Rotundine with a melting point of 191°C is applied in tablet manufacturing, where it promotes thermal stability during processing. Particle Size <10 µm: Rotundine with particle size under 10 micrometers is included in injectable solutions, where it enables rapid and uniform absorption. Stability at 25°C: Rotundine exhibiting stability at 25°C is deployed in shelf-stable oral capsules, where it maintains potency over time. Specific Optical Rotation +52°: Rotundine with a specific optical rotation of +52° is used in stereoselective synthesis, where it guarantees enantiomeric purity for targeted drug activity. Water Solubility 5 mg/mL: Rotundine with water solubility of 5 mg/mL is formulated in liquid suspensions, where it allows for high dosing accuracy. Loss on Drying <0.5%: Rotundine with loss on drying below 0.5% is used in lyophilized preparations, where it ensures minimal moisture interference. Residual Solvent <10 ppm: Rotundine with residual solvent content lower than 10 ppm is applied in pediatric medicines, where it provides enhanced safety and compliance with regulatory standards. |
Competitive Rotundine prices that fit your budget—flexible terms and customized quotes for every order.
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Down in our synthesis line, Rotundine holds a unique place among our products. Our staff recognize the smell long before a batch is ready. Over the years, we have developed and scaled a method for producing high-purity Rotundine, known in technical circles as l-tetrahydropalmatine, with consistency that grows out of boots-on-the-floor experience. Every drum going out the door represents a blend of automated efficiency and touch-by-hand adjustment—something we have improved every production cycle.
Our current commercial model has settled at a refined crystalline powder with purity above 98%, backed by batch analysis from both in-house and accredited third-party labs. Factory QA pulls samples from every lot, not just the ones with the best numbers, so surprises have little chance to slip through. Our technicians no longer need to fret over residual solvents at regulatory limits, as recurring tweaks in washing and purification have paid off, cutting them well below guidelines.
Rotundine finds its main users in pharmaceutical research, both for direct pharmacological studies and as an intermediate for more advanced applications. Academic groups and formulation houses lean on it for its well-documented effects on nervous system receptor pathways. Companies looking into pain management solutions, or developing non-addictive anxiolytics, turn to Rotundine as a reliable standard.
In our experience, researchers and production formulators want more than material that simply meets assay. They push for batch-to-batch reliability, low endotoxin levels, and physical properties fit for their operations. Recent improvements in our drying process deliver a powder with a particle size range kept between 60 and 80 mesh. This detail—rarely highlighted on datasheets—matters, especially for labs with delicate feeding and mixing needs. We have seen this difference first-hand when customers ran pilot trials: reproducible flow minimizes line downtime and sample wastage.
Our labs have fielded plenty of technical calls over ten years of making Rotundine. Some clients ask for direct input on dissolution rates, compatibility with their excipients, and even experience sharing on suitable solvents when dissolving for animal studies. Open dialogue uncovers minor process tricks that make a job easier, or even expose a lurking contamination issue upstream. This exchange of experience helps researchers move from small-scale tests to development batches with fewer setbacks.
We make and stand behind Rotundine from raw material to finished product. This guarantees traceability—every container ties to a batch record, every batch’s starting materials logged with supplier QC reports. We see differences in the market between our Rotundine and material passing through several layers of distribution before appearing under a new label. Customers with time to run comparison trials report subtle variations: some foreign stocks contain higher water content, show slightly off-white tints, or fail sterility validation for injectable solutions.
These observations line up with issues we’ve encountered ourselves. Through the years, containers sourced from intermediaries sometimes arrived with degraded product from poor sealing or temperature swings during shipping. This shows up as caking, yellowing, and a stubborn baseline of unidentified impurities in chromatographic analysis. By producing in-house, we monitor and correct humidity controls, storage, and packaging at each step—this keeps our customers out of guessing games.
Another difference is the response to regulatory demands. We design our process with continuous improvements driven by on-site audits. Customers working on regulated studies—whether the requirements come from the US, EU, or local agencies—benefit from transparent documentation packages, including full residual solvent summaries, heavy metal profiles, and microbial limits. Being a manufacturer means fielding audits directly in the plant, not just forwarding paperwork upstream.
Manufacturing this product has not come without headaches. Early efforts often ran into problems with crystallization—rotundine loves to stick to reactor walls, pinching yields and slowing cleanup. Our team spent months refining solvent choices and temperature profiles to avoid losses, and every improvement left a mark on operating manuals. That sort of practical manufacturing knowledge ends up more valuable than anything found in published literature.
Environmental responsibility plays a big role in our process. Early years left us dealing with excessive solvent recovery from mother liquors, leading to costly reprocessing and local emissions headaches. We put in new recovery equipment and shifted to cleaner solvent systems. These changes cut energy use, lowered waste, and kept both workers and neighbors safer. Customers, especially those with strict environmental protocols, appreciate the level of control that comes from onsite production and continuous improvement.
Safety matters at every scale, from ten grams to tons. We run strict hazard reviews on each synthesis and purification change, aiming to limit chemical exposure and improve safeguards around flammable or toxic reagents. Rotundine production may seem simple on paper: a few classic alkaloid extractions, a sequence of pH-controlled crystallizations, and some patient refinement. Yet every step opens doors for new risks—unplanned exotherms, slip-and-trip wet floors, or lingering vapors after vessel charging.
Process safety means direct oversight, not outsourcing away responsibility. Each annual review pulls in suggestions from line operators and plant safety staff, not just engineers or managers. We have seen imperfect batch control spark reactive incidents at other plants. In our plant, safety rounds and prompt reporting have stopped more than one small spill from turning into a major cleanup. This culture draws notice from regulatory inspectors, but it more importantly builds trust with our long-term partners.
Rotundine batches moving to pharma customers must pass tight purity and contamination checks. We developed a suite of checks for elemental impurities, pesticide residues, and bioburden. Our in-house routines pick up fluctuations caused by changes in upstream plant material or sourcing. We have learned to run duplicate chromatographic methods for suspect lots—keeping one traditional and one high-end instrument calibrated, seeking out low-level contaminants that otherwise slip past.
Direct support for research and manufacturing partners shapes a big part of our business. Besides the promise of traceability and purity, our technical desk answers questions about product handling, formulation challenges, and trouble-shooting batch irregularities. Many times, researchers call or write after hitting a wall with inconsistent results from secondary-market rotundine. A short conversation, sometimes confirming the value of a particular solvent or warning about common excipient incompatibilities, bridges the gap between costly failed experiments and productive development.
Some customers require relatively small-scale lots, sometimes with unique purity or particle specifications. With in-house control, we adjust production sizing or tune the final grinding step, rather than dictating a limited product lineup. Academic users may start with a few hundred grams yet scale to multiple kilos for early-stage production runs. Our batch flexibility supports their goals and reduces the need for last-minute material substitutions. Most importantly, this flexibility keeps us honest—feedback from these partners has steered countless decisions on process optimization, impurity tracking, and packaging design.
Raw rotundine supplies fluctuate with harvests of Corydalis and related botanical sources. As a primary manufacturer, we learned to manage supply swings by advance contracting with growers and cooperative partners. Drought years or overharvesting periods drive up prices and pinch extraction yields, especially for producers relying on third-tier suppliers. We plan out reserves, split raw supplies among incoming customer demands, and occasionally work with clients to find alternative scheduling windows when stocks run tight.
Competing products in the market show visible variance in quality, traceability, and overall handling. Customers sometimes attempt to cut costs by sourcing unbranded generic stocks, finding gaps in documentation or failing validation requirements shortly after. Our team observes the market closely, identifying new entrants, third-party relabelers, or semi-synthetic alternatives. We base our differentiation on firsthand performance in production—higher consistency over years of direct batch data, faster support cycles, and fewer product holds.
Chemical manufacturing, especially in the pharmaceutical sector, evolves with new guidelines. Rotundine, due to its pharmacological relevance, faces periodic reclassification, shifting occupational limits, and inspection cycles. We track these regulatory moves, updating our compliance protocols, lot tracking, and analytical testing packages ahead of changing standards. Timeliness prevents both supply interruptions and downstream audit headaches for our customers.
Process improvements grow from feedback and field performance data. Over several years, customer requests led us to redesign packaging with improved moisture barriers, smaller increment fill sizes, and antistatic liner options. Labs reported fewer product losses from clumping or adsorption, saving time and effort in formulation.
Another direction for improvement came from automation. By incrementally automating batch weighing, temperature control, and endpoint data logging, we trimmed accident rates, improved recall response times, and made large-scale runs more predictable. Each step results from measured investment—not all-at-once capital outlay, but steady growth driven by real inefficiencies on the line.
Research clients, especially in biotech and pharmaceutical development, work with tight deadlines and heavy investment behind each batch run. As the original manufacturer, we keep extra capacity and trained staff on hand to support urgent requests or expedited reruns. Unforeseen delays in animal studies, toxicity trials, or stability studies can threaten entire grant cycles or licensing negotiations. By holding inventory buffers and reserve line time, we have smoothed over many of these critical moments for long-term partners.
Confidentiality and data integrity add extra weight to Rotundine contracts with clinical-stage partners. Our plant manages sample retrieval, tamper-evident packaging, and secure shipping logistics, reducing the risk of supply chain breaches. Customers handling preclinical or investigational new drug applications find confidence working with a plant that owns each point from synthesis to delivery.
Market trends increasingly reward transparent, direct-from-manufacturer sourcing—especially for products like Rotundine. Drug companies, contract research organizations, and trusted labs ask for direct supply routes, verified by batch certificates and physical audit trails. Being the original producer, we control and stand by each shipment, giving downstream users a higher degree of certainty. Supply chain disruptions from pandemics or regulatory issues seldom catch us off guard, due to forward planning in both raw stocks and local logistics.
By maintaining full production documentation, line logs, and ongoing stability data, we ease the qualification load for new partners. Direct-to-buyer channels also mean less price volatility and fewer unexplained delays or shortages. If an issue does develop, our chemists, not intermediaries, answer technical follow-up. This approach saves time and reduces misunderstandings that arise in multi-step distribution chains.
The long-term reputation of Rotundine grows from direct user experience. Our clients frequently lead new research in neuropharmacology, pain management, and natural product synthesis. As new methods and applications arise, we allocate R&D resources into exploratory batches, working out production kinks in parallel to the evolving science. Candid feedback from experienced investigators gives us an edge, pinpointing operational or process factors others often overlook.
We return this investment by sharing practical manufacturing insight. Whether it’s a shortcut for dissolving in tough solvents, a heads-up about seasonal impurity spikes, or strategies for heterogeneous mixing in pilot plants, our technical support reduces trial and error. This ethos, grounded in decades at the plant, assures every Rotundine user of a resource beyond just bulk drums or pre-packed bottles.
The strength of Rotundine as a product does not just stem from a chemical formula. It comes from the accumulated fixes, day-to-day troubleshooting, and years of experimentation, both in the plant and in the field. Open lines to our manufacturing team empower researchers and producers to solve real-world challenges, leading to more productive, safer, and more reliable outcomes.