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3-Methylquinoline N-Oxide

    • Product Name 3-Methylquinoline N-Oxide
    • Alias Quinoline, 3-methyl-, 1-oxide
    • Einecs 629-066-6
    • Mininmum Order 1 g
    • Factory Site Tengfei Creation Center,55 Jiangjun Avenue, Jiangning District,Nanjing
    • Price Inquiry admin@sinochem-nanjing.com
    • Manufacturer Sinochem Nanjing Corporation
    • CONTACT NOW
    VTB
    Specifications

    HS Code

    572673

    Chemical Name 3-Methylquinoline N-Oxide
    Molecular Formula C10H9NO
    Molar Mass 159.19 g/mol
    Cas Number 1793-32-2
    Appearance White to off-white solid
    Melting Point 95-99°C
    Solubility Soluble in organic solvents such as ethanol and dimethyl sulfoxide (DMSO)
    Purity Typically ≥98%
    Storage Temperature Store at 2-8°C
    Smiles CC1=CC=CC2=CC=CC=N2O1
    Iupac Name 3-Methylquinoline 1-oxide

    As an accredited 3-Methylquinoline N-Oxide factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.

    Packing & Storage
    Packing The packaging for 3-Methylquinoline N-Oxide (5 grams) is a tightly sealed amber glass bottle with a tamper-evident cap.
    Shipping 3-Methylquinoline N-Oxide should be shipped in tightly sealed containers, protected from light and moisture, and labeled according to chemical safety regulations. It must be handled by trained personnel, using appropriate personal protective equipment (PPE), and shipped according to applicable local, national, and international transport regulations for laboratory chemicals.
    Storage 3-Methylquinoline N-Oxide should be stored in a tightly closed container, in a cool, dry, and well-ventilated area, away from direct sunlight, heat sources, and incompatible substances such as strong acids or bases. It is advisable to keep the chemical away from ignition sources and moisture. Clearly label the container and follow all relevant safety and regulatory guidelines for handling and storage.
    Application of 3-Methylquinoline N-Oxide

    Applications of 3-Methylquinoline N-Oxide in Industrial Manufacturing

    As the original manufacturer, we support multiple downstream industrial sectors with 3-Methylquinoline N-Oxide as a specialized intermediate. Its unique oxidation profile and stability enable advanced process development in pharmaceuticals, agrochemicals, dyes, and specialty chemicals. Below are major application routes and integration details for this raw material.

    1. Pharmaceutical API Intermediate Synthesis

    Pharmaceutical producers use 3-Methylquinoline N-Oxide as a key intermediate for the synthesis of quinoline-based active pharmaceutical ingredients. Its N-oxide functionality improves selectivity during regioselective substitution and oxidation steps, including the preparation of antimicrobial, anti-malarial, and anti-inflammatory drug candidates. Manufacturing employs the N-oxide scaffold to facilitate ring transformation or substitution before reduction or further modification. Purified lots meet stringent residual solvent and heavy metal criteria to ensure downstream GMP compliance and batch reproducibility.

    Industry compliance standards

    • ICH Q7 Good Manufacturing Practice Guide for Active Pharmaceutical Ingredients
    • United States Pharmacopeia (USP) Residual Solvents <823>
    • European Pharmacopoeia (Ph. Eur.) Impurity Control Protocols
    • China Pharmacopoeia (ChP) for Intermediate Quality

    Typical usage ratio

    • 0.2–1.0 molar equivalents per API batch; final ratio depends on intended regioselectivity and endpoint transformation. Stoichiometry fine-tuned by process R&D.

    Downstream process integration

    • Integrated in initial or mid-stage steps of synthetic route for complex quinoline derivatives.
    • Typically enters nucleophilic substitution or oxidation steps, routinely followed by deoxygenation or functional group modification.
    • QC sampling conducted pre- and post-purification to confirm trace impurity levels.

    Final product types

    • Anti-malarial actives (e.g., chloroquine/analogs)
    • Fluoroquinolone antibiotics
    • Anti-inflammatory quinoline derivatives
    • Custom small-molecule APIs for clinical development

    2. Agrochemical Intermediate for Herbicide and Insecticide Synthesis

    Producers in the agrochemical sector deploy 3-Methylquinoline N-Oxide to construct advanced nitrogenated heterocyclic scaffolds, critical for selective herbicide and insecticide actives. The N-oxide group enables directed functionalization at the 2- and 8-positions by electrophilic substitution, allowing further elaboration to bioactive pyridine and quinoline compounds. Manufacturing lines emphasize control of trace contaminants due to environmental regulatory requirements.

    Industry compliance standards

    • ISO 9001:2015 Quality Management for Fine Chemicals
    • FAO Guidelines for the Quality Control of Pesticides
    • REACH Regulation (EC 1907/2006) Substance Registration
    • OECD Good Laboratory Practice for Agrochemical Intermediates

    Typical usage ratio

    • 0.5–1.2 mole per target molecule; ratio customized according to conversion yield and required substitution depth.

    Downstream process integration

    • Deployed in early-stage synthesis for heterocycle construction preceding halogenation or alkylation.
    • Often combined with chlorinating agents or metal catalysts for specific coupling reactions.
    • Inline monitoring tracks residual N-oxide content to ensure product quality pre-formulation.

    Final product types

    • Selectively-acting herbicides and pre-emergent weed control concentrates
    • Systemic insecticide intermediates
    • Nitrogen-heterocycle-based pest management agents
    • Seed treatment actives

    3. Oxidant or Regioselective Catalyst in Dye Intermediate Manufacturing

    Direct dye and pigment manufacturers utilize 3-Methylquinoline N-Oxide as a regioselective oxidation agent and as a precursor for extended conjugated quinoline chromophores. The material’s N-oxide functionality drives site-specific oxidation and coupling processes needed for high-purity dye intermediates, which require strict color fastness and shelf life. Operations optimize reaction profile to minimize colored byproducts, with full batch traceability and waste minimization.

    Industry compliance standards

    • GHS/CLP Regulation (EC 1272/2008) for Colourant Labelling
    • OEKO-TEX® Standard 100 Substance Input Criteria
    • ISO 9001:2015 Quality Standards for Dye Intermediates
    • Zero Discharge of Hazardous Chemicals (ZDHC) requirements for textile chemicals

    Typical usage ratio

    • Typically 5–15% w/w against base quinoline compound; exact weight adjusted to targeted depth of oxidation and desired colour intensity.

    Downstream process integration

    • Charged into batch reactors alongside parent quinoline compounds during first or second oxidation stages.
    • Additive order and temperature profile tightly controlled to promote desired chromophore formation and minimize tars.
    • QC conducted through HPLC and colorimetry post-reaction.

    Final product types

    • Acid and basic dye intermediates
    • Quinoline-based disperse dyes
    • Speciality pigments for plastics and coatings
    • Textile and leather dye precursors

    4. Building Block in Specialty Chemical Synthesis

    Specialty chemical companies apply 3-Methylquinoline N-Oxide as a reactive intermediate for the production of functionalized heterocycles and electronic material precursors. Its role includes generation of quaternary salts, preparation of advanced ligands for catalysts, and further transformation into fluorescent and UV-absorbing compounds. Custom synthesis customers specify trace impurity thresholds and reactivity controls depending on end-use sector.

    Industry compliance standards

    • ISO 14001:2015 for Environmental Management in Specialty Chemicals
    • REACH Substance and Intermediate Registration
    • UL Certified Material Handling (where applicable)
    • Customer-specific technical agreements and NADCAP criteria (for electronics applications)

    Typical usage ratio

    • 10–40% w/w in multi-component synthetic reactions; scale and concentration selected based on desired final molecular weight and structural modifications.

    Downstream process integration

    • Introduced as a core reactant at early to mid-steps for N-alkylation or condensation reactions.
    • Subsequently purified via liquid-liquid extraction and recrystallization to remove unreacted N-oxide.
    • Final functionalization step determines conversion efficiency and performance profile.

    Final product types

    • Technical-grade ligands for metal catalyst manufacturing
    • Fluorescent dye components for analytics and bioimaging
    • UV-absorber intermediates for plastics and polymer additives
    • Specialty monomers for advanced resins
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    Certification & Compliance
    More Introduction

    Introducing 3-Methylquinoline N-Oxide: Perspectives from the Production Floor

    A Close-Up Look at 3-Methylquinoline N-Oxide

    We work with molecules every day, watching the subtle shifts and transformations that turn base materials into compounds loaded with potential. Among these, 3-Methylquinoline N-Oxide keeps drawing our attention, not just because of its distinct structure, but for the role it plays across several chemical syntheses and research applications. We don’t simply handle a generic powder or bottle—each batch reflects careful control, consistent reactions, and a commitment to the researchers and labs pushing boundaries in their fields.

    What Makes This Compound Stand Out

    Manufacturing 3-Methylquinoline N-Oxide gives us a direct view into how even a small structural tweak, such as the incorporation of the N-oxide group onto the classic 3-methylquinoline backbone, can produce unique reactivity. Chemically, this transformation introduces an oxygen atom bonded to the nitrogen within the quinoline ring, altering both the electronic character and solubility profile of the molecule. From our vantage point, this translates to fresh options for synthetic chemists and a broader range of downstream modifications.

    This compound’s reactivity sets it apart from both its parent molecule, 3-methylquinoline, and the simpler quinoline N-oxides. In practice, we’ve seen researchers favor the 3-methylated version when searching for particular reaction partners or selectivities, often leveraging the altered electron distribution provided by the N-oxide functionality. These adjustments open up new routes for building heterocyclic systems, an area where fine control and predictable results matter.

    Production Insights from the Lab Bench

    Here in the plant, creating reproducible batches requires a careful balance between automation and tactile involvement. Operators supervise the oxidation step, monitoring temperature, time, and the specific oxidant load. Skipping steps or slacking on the purification doesn’t pass muster—our chemists notice even faint traces of over-oxidation or byproducts. Purity sticks close to the 98-99% mark, but getting there depends on sequence, tight process windows, and no shortcuts.

    Some might picture bulk reactors on autopilot; we watch the crystal forms under the light, check for consistent melting points, and look out for subtle color shifts that can foretell problems. From one batch to the next, the learning curve smooths only if you respect the details. Handling this compound safely also means giving due attention to ventilation and the right level of personal protective equipment—factors that too often get glossed over until there’s a real problem.

    Why the Details Matter for Users and Makers Alike

    3-Methylquinoline N-Oxide rarely gets the spotlight outside its niche. Yet, for users needing reliable reactivity for oxidative couplings, N-oxide mediated rearrangements, or functional group interconversions, a consistent source makes a big difference. Labs counting on clean reactions can tell the difference between a batch made with shortcuts and one given proper chemical care.

    Chemists who demand sharp yields and clean reaction endpoints value predictable behavior. That predictability depends on everything from impurity profile to precise handling of moisture and light during shipment. The special position of the methyl group at the 3-position reshapes steric and electronic effects, giving reactions a selectivity profile not mirrored by other quinoline-based N-oxides.

    We’ve heard direct feedback from research partners reporting that our lot-to-lot consistency lets them skip unnecessary purification and spend time refining new synthetic routes instead. In fine chemical work, that time matters.

    Isomers and Alternatives: How 3-Methyl Variation Changes the Game

    A quick glance at the quinoline family tree reveals a crop of close relatives—unsubstituted quinoline N-oxide, 2-methyl variations, and other substituted versions. Each harbors its own quirks when exposed to various reactants and catalysts. We often field questions about why someone would choose the 3-methyl variant. Our experience shows that the 3-methyl positioning blocks certain side pathways, nudges selectivity toward key products, and may both speed up or slow down rearrangements compared to unsubstituted or other methylated forms.

    Working hands-on with these molecules clarifies which substitution patterns survive harsh reagents or electrochemical conditions. Sometimes, 3-Methylquinoline N-Oxide delivers a cleaner route thanks to reduced byproduct formation—less time spent purifying, less material wasted. For multi-step sequences, researchers lean on these subtle advantages, especially in pharmaceutical pre-candidate exploration or functional material design.

    Although the base quinoline N-oxide sees broader commercial use, our 3-methyl version carves out its own niche among those with advanced synthetic questions. Its electron-rich, mildly bulky silhouette puts it right where certain researchers want it: adaptable but selective.

    Practical Suitability and End-User Experience

    User experience, both behind the bench and in the supply chain, often decides a product’s fate. Some of our partners run gram-scale trials, dialing in reaction parameters before scaling up. Rapid access to our product in reliable, well-sealed packaging saves headaches. Minimizing solvent carryover and moisture intrusion keeps each delivery consistent from our facility to your bench. We’ve noticed shorter start-up delays and fewer troubleshooting calls from labs that handle our compound compared to those using loosely specified or lower-purity imports.

    We focus on the details that don’t get headlines—tight particle size distribution, proper labeling from the start, and real traceability for every lot. If there is a batch-to-batch difference, our logbooks let us track the issue right down to the day and the person who ran the synth.

    Challenges on the Production Side

    We don’t gloss over difficulties in manufacturing this material. The oxidation reaction, if pushed too hard, leaves behind over-oxidized junk that requires extra passes to filter out. Under-oxidation means more repeats and yield loss. The reaction environment—temperature, oxidant type, and solvent—demands close control. We adapt based on the weather, the lot of raw materials, and hard-earned experience. Getting repeatable quality from batch to batch is a matter of attention, not automation.

    Then there is scale. On larger scales, heat management and gas evolution require special handling. We’ve invested time and resources into scaling up without sacrificing the fine details. For smaller research quantities, the focus shifts toward packaging, so the N-oxide doesn’t see excess exposure to light or damp.

    Shipping regulations also create their share of paperwork and logistics headaches. Our in-house compliance staff manages ever-shifting transport guidelines—no researcher wants their test compounds delayed at customs over ambiguous labeling or paperwork slip-ups. Being on top of regulatory landscapes ensures our deliveries keep moving and our customers’ work flows uninterrupted.

    Downstream Research, Real-World Impact

    The uses for 3-Methylquinoline N-Oxide keep evolving, but several core applications keep showing up. Oxidative functionalization and migration reactions, building more complex heterocycles, and, in some cases, even exploring bioactivity profiles, find fertile ground with this compound. A well-documented example from the literature uses this N-oxide in Pummerer-type reactions, allowing for strategic oxygen transfer and facilitating ring expansion or rearrangement chemistry.

    In recent months, we’ve followed published research leveraging the molecule as an intermediate for more elaborate APIs and as a probe in mechanistic studies. Pharmaceutical teams and materials scientists each see something different in its chemistry, but both demand purity, reliability, and unambiguous structure. These requirements echo back through our process—from which raw materials we accept to how we train new operators.

    The drive toward green chemistry also shapes our approach. We see research groups searching for catalysts that work in water or lower-toxicity solvents, exploring ways to minimize waste and streamline their syntheses. Stable and well-characterized starting materials like 3-Methylquinoline N-Oxide keep these efforts moving forward.

    Why Sourcing Directly from Manufacturers Matters

    Direct relationships matter in this business. For those who have relied on resellers or generic imports, small but frustrating variations in product quality make a big difference during sensitive syntheses. Off-odors, inconsistent crystal forms, poor solubility, and labeling confusion often trace back to lackluster manufacturing standards or storage lapses along the supply chain. By keeping operations under one roof, we provide clear answers on origin, storage conditions, and real-time shipment tracking.

    Traders and outsourcers rarely see the lab feedback we get—what worked, what stalled, or where the real bottlenecks occur. We incorporate this feedback directly into our production cycle. When a lab runs into trouble, we can track down the concern directly, sometimes to a tweak in the raw materials or a shift in ambient humidity that others wouldn’t bother flagging.

    Our customers invest time and funding in each experiment. So do we, from the reactor floor to the shipment dock. Keeping an expert team, up-to-date analytical tools, and open feedback channels lets us offer not just the chemical, but real partnership as research progresses.

    Supporting the Broader Landscape of Organic Synthesis

    Organic synthesis pushes chemists to discover new methods, build more complex targets, and chase efficiency. Access to well-made 3-Methylquinoline N-Oxide, backed by matching data and documentation, takes away certain risks that stall development. Researchers trust suppliers who show consistency, not just in certificates of analysis but in the day-to-day process—reliable transport, responsive technical support, and a willingness to troubleshoot.

    We often consult with development teams seeking slight modifications to the basic product—larger particle sizes, custom solvent flushes, or alternate drying protocols. Having full control of synthesis and packaging lets us adapt quickly for teams scaling up from grams to kilograms. Custom work relies on flexibility in both process and attitude; keeping technical conversations alive between our production floor and an R&D bench overseas ensures no detail gets lost.

    We see clear benefits when the end user and the manufacturer manage a direct dialogue. Real outcomes—cleaner syntheses, faster optimizations, fewer side reactions—grow from close cooperation, shared standards, and a common focus on scientific rigor.

    Real-World Examples and Testimonies

    Over time, we gather feedback that goes beyond the dry analytics. One research group, working on a new ligand system, tracked increased yields after switching to our 3-Methylquinoline N-Oxide, cutting two steps from their purification and saving a week per campaign. Another team focused on functional materials commented specifically on how our batch stability during long storage simplified their scale-up from lab to pilot plant.

    In pharmaceutical discovery, where milligrams decide the success of a lead compound, the benefits of process control and tight specifications prove themselves. A late-stage project used our material for ring-opening studies; the lead scientist shared how our shipments, always precisely within spec, allowed their group to finish ahead of schedule, skip reordering delays, and push results further before quarterly reviews.

    Small details, tracked batch by batch, matter most after delivery—clean dissolution, correct melting point, reliable formulation in downstream blends. Each user brings a slightly different goal and application, but all benefit from transparency and open channels between the plant and the bench.

    Outlook, Ongoing Challenges, and Solutions

    Chemical manufacturing often becomes a race against time, cost, and changing research needs. For products like 3-Methylquinoline N-Oxide, we face natural resource limits, pricing pressure on specialty raw materials, and always the looming need to minimize environmental impact.

    We continue to work on enhancing process safety and environmental footprint: searching for greener oxidants, improving waste recovery, and reusing solvents where quality allows. Staff training grows more critical as regulations tighten and technology develops—everyone in the process, from the operator to the technician in analytics, gets regular refreshers, not just on protocols but regarding the chemistry behind the steps.

    As new synthetic strategies emerge, we track the evolving requirements. One emerging area sees increased demand for metal-free oxidations and stricter certification around trace metals—a shift we’re actively working to accommodate with targeted process adjustments and upgraded analytical support.

    Whenever research partners bring new needs to the table, whether for higher purity, alternative packaging, or joint troubleshooting on stubborn reactions, we treat those needs as our next challenge, not a sideline concern.

    Summary Thoughts from the Factory Floor

    Every batch reminds us that 3-Methylquinoline N-Oxide is more than a catalog number. It’s a practical tool for the organic chemist—a result of each run through the reactor, each analysis, every careful packing and shipment decision. Whether enabling new discoveries or quietly supporting routine syntheses, a well-made compound forms the backbone of the projects it serves.

    Bringing this product to labs around the world means more than just filling orders. We see ourselves as partners in each user’s progress—engineering every step with the same thoroughness we want in our own research. A chain of care at each stage, built on practical expertise and a willingness to learn from every lot and every outcome, continues to raise the bar.