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3-Hydroxy-1-Methylpyridazin-6(1H)-One

    • Product Name 3-Hydroxy-1-Methylpyridazin-6(1H)-One
    • Alias 3-Hydroxy-6-methylpyridazin-1(6H)-one
    • Einecs 259-477-4
    • 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

    455715

    Iupac Name 3-hydroxy-1-methylpyridazin-6(1H)-one
    Molecular Formula C5H6N2O2
    Molecular Weight 126.12 g/mol
    Cas Number 1454-75-9
    Appearance White to off-white solid
    Melting Point 250-254°C
    Solubility In Water Slightly soluble
    Smiles Cn1nc(O)ccc1=O
    Inchi InChI=1S/C5H6N2O2/c1-7-5(9)3-2-4(8)6-7/h2-3,8-9H,1H3
    Synonyms 1-Methyl-3-hydroxy-6-pyridazinone

    As an accredited 3-Hydroxy-1-Methylpyridazin-6(1H)-One factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.

    Packing & Storage
    Packing The product is packaged in a sealed amber glass bottle containing 10 grams, labeled with hazard information, chemical name, and batch number.
    Shipping 3-Hydroxy-1-Methylpyridazin-6(1H)-One is shipped in tightly sealed, chemically resistant containers to prevent contamination and moisture exposure. The packaging complies with chemical safety regulations, and all containers are clearly labeled. Shipping follows standard protocols for non-hazardous laboratory chemicals, ensuring safe handling and transit. Material Safety Data Sheets accompany every shipment.
    Storage 3-Hydroxy-1-Methylpyridazin-6(1H)-One should be stored in a cool, dry, and well-ventilated area, away from direct sunlight and incompatible substances. Keep the container tightly closed and properly labeled. Store at room temperature, avoiding moisture and extreme temperatures. Personal protective equipment should be used when handling. Follow all relevant safety guidelines for chemicals and consult the Safety Data Sheet (SDS) for detailed instructions.
    Application of 3-Hydroxy-1-Methylpyridazin-6(1H)-One

    Applications of 3-Hydroxy-1-Methylpyridazin-6(1H)-One in Industrial Manufacturing

    3-Hydroxy-1-methylpyridazin-6(1H)-one, as produced in our dedicated synthesis facility, is applied in multiple advanced industrial sectors. Our partners use this compound as an intermediate or additive in regulated markets requiring strict quality and documentation control. Below are validated industrial applications, highlighting integration points, formulation ranges, process detailing, compliance standards, and representative end products.

    1. Pharmaceutical Intermediate – API Synthesis

    Manufacturers employ this material as a privileged heterocycle for active pharmaceutical ingredient (API) development, particularly in the cardiovascular and anti-inflammatory therapeutic areas. Its integration occurs as a core scaffold or advanced building block in multi-step organic synthesis, allowing precise functionalization. Quality assurance teams monitor purity and residuals strictly in compliance with ICH Q7. Batch release demands a consistent impurity profile and documentation traceability according to regional pharmacopoeia standards.

    Industry compliance standards

    • ICH Q7 Good Manufacturing Practice for Active Pharmaceutical Ingredients
    • European Pharmacopoeia Monograph 5.0–API
    • U.S. Pharmacopeia (USP) General Chapter <797>, <1078>
    • CFR Title 21 Part 211 (U.S. FDA cGMP requirements)

    Typical usage ratio

    • 0.8–2.5 molar equivalents per step depending on the route; adjusted based on coupling efficiency in pilot and commercial batches

    Downstream process integration

    • Introduced post-bromination step as a nucleophile for heterocyclic extension
    • Utilized in condensation or alkylation protocols with in-process controls for conversion and stability
    • Maintained under anhydrous conditions until final crystallization
    • Integrated before final API purification for salt formation or as a precursor for further derivatization

    Final product types

    • Anti-hypertensive drug bulk (e.g. pyridazinone derivatives)
    • Non-steroidal anti-inflammatory drug intermediates
    • Branded API forms, including hydrochloride and succinate salts
    • Generic finished dosage forms (tablets, capsules)

    2. Agrochemical Synthesis – Crop Protection Agents

    The pyridazinone structure is widely recognized in the synthesis of selective herbicides and fungicides. Downstream processors introduce this intermediate during the construction of complex active ingredients used for broadacre and specialty crop pest control. Compliance with agrochemical manufacturing standards necessitates full traceability of synthesis, as well as validated impurity control in alignment with FAO/WHO specifications and OECD registration dossiers. Documentation supports both local and export regulatory submissions.

    Industry compliance standards

    • ISO 9001:2015 Quality Management System
    • FAO/WHO Specifications for Plant Protection Products
    • OECD Guidelines for the Testing of Chemicals
    • REACH Registration (EC 1907/2006) for EU importers

    Typical usage ratio

    • Usually 1.0–1.2 equivalents per synthetic cycle; fine-tuned according to target actives yield in 200–2000 kg commercial scale

    Downstream process integration

    • Added during ligation or cyclization to construct heterocyclic frameworks in crop protection molecules
    • Combined with thioether or ether substituents to generate derivative libraries
    • Subjected to controlled chlorination or methylation as per product design
    • Processed before granulation and suspension concentrate formulation

    Final product types

    • Selective pre-emergence herbicides
    • Systemic fungicides for cereals and fruits
    • Pyridazinone-based insecticide intermediates
    • Ready-to-use wettable powders and granules

    3. Fine Chemical Synthesis – Specialty Dyestuffs

    In the colorants sector, downstream manufacturers use this molecule for the synthesis of specialty dyestuffs, especially for applications in high-performance coatings, inks, and fiber coloring. The compound provides a rigid, electron-rich heterocycle that enhances chromophore stability. Adherence to EN 71, GHS, and sector-specific banned substance lists is enforced at each process stage to support global supply to regulated textile and coatings markets.

    Industry compliance standards

    • Regulation (EC) No 1272/2008 (CLP/GHS)
    • EN 71-3:2019 for migration of elements in toys and coatings
    • ISO 9001:2015 for quality system traceability
    • Compliance with Zero Discharge of Hazardous Chemicals (ZDHC) requirements in dyes processing

    Typical usage ratio

    • 15–40% wt/wt relative to azo or anthraquinone core units; adjusted according to bath concentration in batch or continuous dye synthesis

    Downstream process integration

    • Introduced during coupling reactions with diazonium or reactive chromophores
    • Blended in pigment precursor solutions before precipitation
    • Processed under closed-loop systems to minimize emissions and cross-contaminants
    • Subjected to controlled drying and milling before final packaging

    Final product types

    • High-stability synthetic dyes for plastics
    • Solvent-based printing inks
    • Textile disperse coloration compounds
    • Coating additives for exterior industrial use

    4. Diagnostic Reagent Intermediate – Clinical Chemistry

    Diagnostic chemical suppliers utilize this heterocycle in the synthesis of specialty chromogenic or fluorogenic substrates, supporting clinical analyzers and enzymatic assay kit production. Precise control over trace impurities, solubility parameters, and reactivity ensures lot-to-lot reproducibility. Batch records and validated analytical methods are required per FDA and EU IVD directives to ensure end-user safety and data integrity.

    Industry compliance standards

    • ISO 13485:2016 Quality Management Systems for Medical Devices
    • EU Regulation (EU) 2017/746 for In Vitro Diagnostic Medical Devices (IVDR)
    • U.S. FDA 21 CFR Part 820 (QSR for Diagnostics Manufacturing)
    • CLSI EP06 for evaluation of clinical laboratory reagents

    Typical usage ratio

    • 5–12% by mass in substrate mixture formulations; adjusted based on intended detection limit and assay format

    Downstream process integration

    • Combined with chromogenic groups in substrate synthesis for enzyme-linked reactions
    • Added as a coupling component in preparation of colorimetric or fluorometric assay kits
    • Processed in a segregated clean area, followed by sterile filtration
    • Integrated before lyophilization and final kit assembly

    Final product types

    • Clinical analyzer calibration kits
    • Ready-to-use colorimetric diagnostic reagents
    • Fluorogenic probe substrates for ELISA and PCR
    • Routine blood and urine test solution components
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    Certification & Compliance
    More Introduction

    3-Hydroxy-1-Methylpyridazin-6(1H)-One: An Engineer’s Perspective on Its Practical Value and Distinct Nature

    From the Production Floor: The Real Story of 3-Hydroxy-1-Methylpyridazin-6(1H)-One

    We manufacture 3-Hydroxy-1-Methylpyridazin-6(1H)-One because over the years, customers and researchers have sought substances that deliver reliability in synthesis, resilience in application, and predictable behavior batch after batch. Sitting in the practical range of organic heterocycles, this compound stands out in our lineup for a few reasons rooted in years of chemistry under our own roof.

    Specifications and Purity: Insights from a Chemist’s Bench

    Organic synthesis depends on purity. We prepare 3-Hydroxy-1-Methylpyridazin-6(1H)-One using methods that have seen years of refinement on our own premises, involving careful monitoring at every stage. Analysis by HPLC, NMR, and MS ensures each lot achieves high purity, with typical batches tested to exceed 98%. The product forms a solid at room temperature, and packing it in protective, airtight containers makes our shipping team’s life easier and the chemists at our customers’ sites happier. Moisture can challenge stability, so storage practices matter—a detail often overlooked until you’ve seen a sensitive batch degrade.

    Lot-to-lot consistency comes from monitored reaction temperatures and rigorous filtration. Experience tells us minor tweaks in conditions can tilt impurity profiles, so our process prioritizes parameter control and direct observation over blind automation. Every time a technician samples the intermediate, that’s not just procedure—it’s heritage, and it has saved many a ton from waste.

    Why This Molecule Matters in Application—Beyond the Lab

    People often ask about use cases. In our experience, 3-Hydroxy-1-Methylpyridazin-6(1H)-One finds a real home as an intermediate, especially for specialty pharmaceuticals, research into enzyme inhibitors, and in select agrochemical discovery pipelines. The hydroxy group at position 3 and the methyl group at the nitrogen distinguish this scaffold from others, giving chemists an easily modified handle during later-stage functionalization. Our customers prefer this molecule both for its reactivity and for cost-effectiveness over some closely related heterocycles.

    The pharmaceutical research sector appreciates how this structure paves the way for rapid analog synthesis. We’ve watched teams take this compound and run it through acetylation, alkylation, and cross-coupling reactions without the unpredictability that haunts more complex scaffolds. The tautomeric stability, provided by the arrangement of the N-methyl and 3-hydroxy configuration, streamlines isolation and downstream processing—a winning factor during process optimization and scale-up. Many intermediates fail to provide this ease.

    Comparison With Related Pyridazinones—Ground Truth From Our Labs

    We manufacture several pyridazinones, which makes us keenly aware of subtle differences between them. 3-Hydroxy-1-Methylpyridazin-6(1H)-One stands apart by bridging the gap between cost, functionality, and synthetic flexibility. Shifting the hydroxy or methyl to other positions can create dramatic changes in solubility, crystallinity, and downstream handling. Customers who have tested the 4-hydroxy or 5-hydroxy analogs often circle back to our product for two reasons: predictable crystallization and smoother purification. Simpler solids mean shorter filtration and drying times—a boon for manufacturing on larger scales.

    We notice that this compound also beats other nitrogen heterocycles—such as 3-hydroxypyridine or isomeric hydropyridazinones—whenever a project demands moderate polarity and resistance to decomposition under mild acid or base. These traits cut down on lost material and streamline method transfer between labs and production floors. Our formulation partners value how the hydroxy and N-methyl positions work together to create an organic molecule that stays reasonably soluble in standard organic solvents, yet is easy to isolate as a pure solid.

    Feedback From the Field: Honest Assessments Driving Progress

    Real stories from customers shape our understanding the most. Several clients in medicinal chemistry teams relayed that switching to our 3-Hydroxy-1-Methylpyridazin-6(1H)-One provided improved yields in Suzuki-Miyaura and Buchwald-Hartwig couplings. A few process engineers sent back notes pointing out that the compound’s neat melting and solidification profile reduced the need for re-crystallizations during multi-step syntheses. Third-party reports confirm fewer filtration bottlenecks and less downtime cleaning clogged equipment.

    A major development lab on our roster commented that attempts to substitute this compound for 3-Methyl-6-Hydroxypyridazinones led to higher fraction of byproducts and less reliable downstream conversions. This feedback mirrors what we’ve seen in our test runs. The combination of hydroxy at the 3-position and N-methyl controls side reactivity, at least under well-understood conditions, in ways that other isomers rarely match.

    Technical Experience That Guides Our Production Choices

    We maintain a philosophy rooted in direct oversight of every batch. We noticed a while back that switching glassware types for certain steps led to tiny but measurable differences in product color and impurity levels. Thanks to years spent watching hundreds of liters run through reactors and filters, our team identified ideal process parameters best suited for this molecule. That includes optimal solvents for minimal hydrolysis, reagents grade that slips through purification with the least hassle, and mixing techniques that aid clean phase separation.

    With every scale-up request, we revisit our process—not because of regulatory pressure, but because incremental gains translate straight to better product at lower cost. Our technical team does not hide behind process secrecy; we routinely share our findings with regular customers, especially when it comes to unusual equipment wear or odd color shifts on the final product.

    Addressing Challenges and Seeking Solutions—A Manufacturer’s Approach

    Over the years, one recurring challenge comes down to the sensitivity of this molecule to airborne moisture and occasional sensitivity to aggressive oxidants. Improper storage—exposure to high humidity, for example—can cause subtle shifts in melting point or even partial oxidation, which shows up in later analytical work or manifests as discoloration. Rigorous packaging—an investment in better liners and moisture-barrier bags—has made a tangible difference, not just in how our product performs after months in a warehouse, but in downstream process reliability for our clients.

    Manufacturing demands more than just following recipes; it requires anticipation. We dedicate technicians to watch for micro-changes during every step. The benefit becomes clear in lower batch rejection rates. Small efforts—such as regular calibration of all pumps feeding reactants, and strict tracking of container cleaning schedules—add up. These details help us stand behind every lot, and most importantly, ensure our partners do not experience equipment fouling or lost productivity.

    Where 3-Hydroxy-1-Methylpyridazin-6(1H)-One Outperforms—Direct Anecdotes

    Customers working in high-throughput screening for enzyme inhibition have found this compound’s consistent analytical profile invaluable. Lab-scale automation lines run smoother when the starting building blocks refuse to introduce new contaminants. In catalyst-focused research, ease of derivatization lets research groups expand their libraries using less harsh conditions—directly translating into faster SAR studies, as reported by a biotech group running closely on our heels.

    Process chemists say troubleshooting reduces dramatically with our grade compared to options sourced elsewhere. We’ve received shipment returns for other pyridazinones that fell apart after air exposure, requiring not only reprocessing but also a surge in solvent usage for cleaning. Using 3-Hydroxy-1-Methylpyridazin-6(1H)-One, those headaches all but evaporate. A consistent physical form also avoids caking or bridging in automated feeders—critical for continuous-flow chemistry, now more common as labs push for higher efficiency.

    Supporting Research and Innovation—A Manufacturer’s Responsibility

    We see our role as more than just making bulk product. Our technical specialists routinely share knowledge with research teams tackling challenging chemistry. As part of multi-institution efforts to accelerate synthesis design, the versatility of 3-Hydroxy-1-Methylpyridazin-6(1H)-One earns it a spot in the core set of starting blocks. Because we hold the production data and years of analytical archives, we provide customers not just a certificate, but detailed impurity profiles, stability reports, and real-world trouble-shooting tips that textbooks rarely mention.

    In recent years, a significant portion of our output went to custom synthesis pipelines developing new insecticides. Feedback highlighted that the compound’s compatibility—not just with standard solvents, but with more environmentally responsible alternatives—opened the door to greener, less hazardous manufacturing. Small practical differences, such as a higher threshold to oxidative degradation, make scale-up feasible in less sophisticated facilities that cannot always maintain an inert atmosphere 100% of the time.

    Safety Practices—Experience-Based Advice

    Being both producer and observer of daily operations, we emphasize handling precautions based on practical experience. Standard laboratory gloves and glasses are enough under typical use, but we stress the importance of local ventilation and avoiding unnecessary exposure to hot surfaces, since decomposition can accelerate under extreme heat. Spills, though rare, clean up fast owing to the compound’s solid form, and do not generate volatile odors or problematic dust, making workspace cleanup safe and swift. By focusing on these direct observations, our team prevents small mishaps from snowballing into major interruptions.

    Regular collaboration with logistic partners ensures shipping integrity even over long distances, especially in climates with broad temperature swings. Our robust packing design, a direct result of years observing transit outcomes, protects both product and downstream operators. This real-world attention to detail translates to fewer customer complaints and stronger client relationships in the long term.

    What Sets Manufacturing Apart From Distribution

    Manufacturing 3-Hydroxy-1-Methylpyridazin-6(1H)-One gives us advantages that no trading, distributing or reselling company can replicate. Knowing exactly how the product looks, feels, and reacts under every condition lets us answer technical questions that go beyond datasheets. We’ve watched process engineers make adjustments mid-batch based on minute observations—color change, viscosity variation, or smell. This kind of real-time, hands-on feedback shapes every improvement.

    Most importantly, our records tell us not only how a lot was made, but how it performed in pilot plant and on the customer’s actual equipment. We treat every incident—good or bad—as an opportunity to adapt our process. Our dedication to this feedback loop means customers who source directly from us benefit from cumulative improvements.

    Looking Ahead: Evolving with Scientific Demand

    The rise of precision medicine and targeted agroscience applications points to growing demand for heterocycles tailored to function as reactive intermediates. We adjust our processes to follow these trends, extending technical support for customers working under new regulatory or environmental constraints. Our willingness to take on new process improvements—faster analytics, greener solvents, improved crystallization and filtration operations—keeps this molecule on the cutting edge.

    We’ve taken every opportunity over the last years to make 3-Hydroxy-1-Methylpyridazin-6(1H)-One a dependable asset for those building the next generation of therapeutics or crop protection tools. For us, success is measured in repeat business, direct feedback from production lines, and knowing that every batch means less waste and more reliability for chemists counting on tight project timelines.

    Supporting the Entire Chain: From Lab to Plant

    Our long-term clients—from university groups to multinational product development teams—cite the same bottom line: sourcing from the manufacturer saves time, reduces surprises, and cuts the risk of unexplained downtime. Supplying 3-Hydroxy-1-Methylpyridazin-6(1H)-One has taught us that technical acumen, built from thousands of hours of hands-on work, translates directly to stronger products for our partners.

    We invite feedback and questions, sharing our technical knowledge freely, because every conversation with a client sharpens our process understanding and, in turn, the reliability of every lot that leaves our facility. In a world where chemistry moves fast and expectations rise higher each year, rooting ourselves in genuine, on-the-ground experience serves as the best guarantee our customers can ask for.