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4-Amino-6-Hydroxypyrazolo[3,4-D]Pyrimidine

    • Product Name 4-Amino-6-Hydroxypyrazolo[3,4-D]Pyrimidine
    • Alias Allopurinol
    • Einecs 212-729-9
    • Mininmum Order 1 g
    • Factory Site Tengfei Creation Center,55 Jiangjun Avenue, Jiangning District,Nanjing
    • Price Inquiry sales7@sinochem-nanjing.com
    • Manufacturer Sinochem Nanjing Corporation
    • CONTACT NOW
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    Specifications

    HS Code

    167668

    Chemical Name 4-Amino-6-Hydroxypyrazolo[3,4-D]Pyrimidine
    Molecular Formula C5H5N5O
    Molecular Weight 151.13 g/mol
    Cas Number 368-39-8
    Appearance White to off-white powder
    Melting Point >300°C
    Solubility In Water Slightly soluble
    Purity Typically ≥98%
    Boiling Point Decomposes before boiling
    Storage Conditions Store at room temperature, dry and protected from light
    Iupac Name 4-amino-1,6-dihydro-6-oxopyrazolo[3,4-d]pyrimidine
    Synonyms Nipazine; Allopurinol analog

    As an accredited 4-Amino-6-Hydroxypyrazolo[3,4-D]Pyrimidine factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.

    Packing & Storage
    Packing Amber glass bottle containing 25 grams of 4-Amino-6-Hydroxypyrazolo[3,4-D]Pyrimidine, sealed with a screw cap, labeled for research use.
    Shipping 4-Amino-6-Hydroxypyrazolo[3,4-d]pyrimidine ships in secure, sealed containers to prevent contamination and moisture exposure. Packages are labeled per chemical safety standards and include hazard information. Shipping complies with local and international regulations for laboratory chemicals, ensuring safe transit and handling. Expedited delivery options are available upon request.
    Storage Store 4-Amino-6-hydroxypyrazolo[3,4-d]pyrimidine in a tightly sealed container, in a cool, dry, and well-ventilated area, away from incompatible substances such as strong oxidizing agents. Protect from light and moisture. Ensure proper labeling and avoid sources of ignition. Use secondary containment to prevent spills and follow institutional chemical storage guidelines for hazardous laboratory chemicals.
    Application of 4-Amino-6-Hydroxypyrazolo[3,4-D]Pyrimidine

    Applications of 4-Amino-6-Hydroxypyrazolo[3,4-D]Pyrimidine in Industrial Manufacturing

    4-Amino-6-hydroxypyrazolo[3,4-d]pyrimidine serves as a critical intermediate in various high-value manufacturing sectors, supporting the synthesis of complex molecules and specialty materials. Below, we detail established industrial applications and provide relevant compliance, formulation, process, and product insights for each downstream segment.

    1. Pharmaceutical Active Pharmaceutical Ingredient (API) Intermediate Synthesis

    This intermediate is widely adopted in pharmaceutical research and commercial API production, especially for antineoplastic and antiviral agents. Its structure enables the assembly of fused heterocyclic motifs found in advanced drug candidates. Our customers primarily use it in multistep synthetic routes leading to kinase inhibitors and nucleotide analogs. During formulation, chemists must tightly control impurity profiles and reaction stoichiometry to ensure consistent yield and regulated endpoint purity.

    Industry compliance standards

    • Good Manufacturing Practice (GMP; ICH Q7)
    • United States Pharmacopeia (USP) general chapter 1078 for APIs
    • European Pharmacopeia (Ph. Eur.)
    • FDA 21 CFR Part 211 (for finished drugs)

    Typical usage ratio

    • 1–5% molar equivalents per target structure, adjusted for route optimization and impurity management

    Downstream process integration

    • Used during heterocycle formation steps by acylation, chlorination, or alkylation
    • Preparatory salt formation or crystallization for purification before next synthetic stage
    • Subject to reaction monitoring (HPLC, GC, MS) at each stage
    • QC sampling post-filtration to confirm advanced intermediate purity

    Final product types

    • Anticancer active pharmaceutical ingredients (e.g., kinase inhibitors)
    • Antiviral nucleoside analog intermediates
    • Experimental oncology drug substances
    • Pharmaceutical research reference compounds

    2. Veterinary Drug Intermediate Production

    Veterinary pharmaceutical producers employ this compound in synthesis networks for animal health actives, targeting anti-infective and anti-inflammatory agents. It supports step-growth procedures in preparing heterocyclic bulk drug intermediates. Formulation scientists monitor batch-wise impurity carryover and adjust charge levels according to regulatory target specifications. High reproducibility in batch operations is essential due to strict veterinary quality oversight.

    Industry compliance standards

    • VICH GL9: Good Manufacturing Practice for APIs
    • Chinese Veterinary Pharmacopoeia (latest edition)
    • U.S. FDA CVM (Center for Veterinary Medicine) cGMP Guidelines

    Typical usage ratio

    • 2–8% relative to principal veterinary intermediate, modified for process throughput and stepwise yield

    Downstream process integration

    • Reacts in condensation and ring-closure operations with select amine or halide partners
    • Operates under aqueous and non-aqueous conditions, depending on the pathway
    • Intermediate isolation by precipitation or liquid-phase extraction
    • Final API conversion through functional group modifications

    Final product types

    • Veterinary antimicrobial bulk drug precursors
    • Livestock growth promoter intermediate substances
    • Animal anti-inflammatory API intermediates
    • Pharmaceutical-grade feed additive building blocks

    3. Agrochemical Active Ingredient Building Block

    The crop protection industry uses this molecule as a scaffold in synthesizing pyrimidine-based pesticides and selective herbicides. It enters the process as a coupling partner in cyclization and functionalization steps for developing novel agrochemicals. Manufacturing chemists must validate process-specific residual content according to international agrochemical regulations. Accurate charge levels are required to maximize throughput and minimize byproducts that could affect regulatory submissions.

    Industry compliance standards

    • FAO/WHO Specifications for Plant Protection Products
    • REACH Regulation (EC) No 1907/2006 (EU)
    • EPA FIFRA 40 CFR regulations (USA)
    • ISO 9001:2015 Quality Management System

    Typical usage ratio

    • 0.5–3.0% by weight of total batch, subject to post-reaction conversion yield and analytical clearance

    Downstream process integration

    • Introduced during core ring assembly in API building stage
    • Employed via condensation reactions under controlled pH and temperature
    • Followed by phase separation and solvent recycling for environmental compliance
    • Residue analyzed by LC-MS/MS before downstream formulation

    Final product types

    • Pyrimidine-based herbicidal actives
    • Custom insecticide intermediate structures
    • Seed treatment active ingredient intermediates
    • Agrochemical R&D lead compound libraries

    4. Dye and Pigment Intermediate for Specialty Colorants

    Chemical colorant developers introduce this heterocycle in syntheses for high-temperature stable dyes and pigment dispersions used in textile and ink applications. It enables formation of extended conjugated systems, improving color fastness and UV resistance. Technicians monitor input ratios for batch-to-batch hue consistency, and comply with international product safety and export regulations on residual materials.

    Industry compliance standards

    • OEKO-TEX ECO PASSPORT chemical requirements
    • Registration, Evaluation, Authorisation and Restriction of Chemicals (REACH, EU)
    • ISO 105-X12:2016 for color fastness
    • EN 71-3 migration guideline for textile and toy colorants

    Typical usage ratio

    • 0.8–2.5% of total dye batch, adjusted for desired chromophore intensity and dispersibility

    Downstream process integration

    • Employed during the azo coupling or condensation phase in colorant synthesis
    • Subjected to neutralization and filtration to remove inorganic side products
    • Dyestuff purified by recrystallization or chromatography
    • Dispersed into final paste or powder form for application

    Final product types

    • Disperse dyes for synthetic fibers
    • High-temperature pigment concentrates
    • Inkjet and textile printing colorants
    • Plastic masterbatch color additives

    5. Research Chemical Reagent for Nucleic Acid Analogue Synthesis

    Chemical research laboratories and diagnostic kit manufacturers require this compound as a reagent in the custom synthesis of nucleic acid analogues and probe molecules. It features in construction of nucleotide mimics and labeled biomolecule standards used for genotyping and NGS reference assays. QC teams ensure individual lots meet analytical reagent specifications, with usage based on planned oligonucleotide or polymer modification volume.

    Industry compliance standards

    • ISO 17025 accredited laboratory process requirements
    • GLP (Good Laboratory Practice) compliance for research reagents
    • Analytical Reagent Grade (ACS, Ph. Eur.) purity benchmarks
    • Restriction of Hazardous Substances (RoHS) Directive (when applicable in diagnostics)

    Typical usage ratio

    • 0.1–1.0 mmol per synthetic sequence, depending on chain length and conjugation efficiency

    Downstream process integration

    • Incorporated in oligonucleotide synthesis cycles
    • Used for functional group exchanges via phosphoramidite chemistry
    • Analytical validation by HPLC-MS pre and post-conjugation
    • Pulldown assays conducted for labeled nucleic acid purification

    Final product types

    • Sequence-labeled oligonucleotide probes
    • Custom nucleotide analogues for biotech assays
    • Molecular reference standards for sequencing
    • Diagnostic kit reagents

    6. Fine Chemical Intermediate for Specialty Material Research

    Advanced materials producers and academic laboratories select this compound for preparing functionalized pyrimidine derivatives, contributing to pilot-scale production of organic semiconductors and sensor substrates. During pilot synthesis, process managers track substrate-to-reagent ratios for scalable reproducibility, especially for electronic property assessment and surface functionalization needs. Purity control remains a top priority due to downstream material device requirements.

    Industry compliance standards

    • ISO 9001:2015 for process quality control
    • RoHS Directive (for electronic material use)
    • ASTM D4236 Identification standard for chemical research materials
    • REACH Annex XVII substance reporting requirements

    Typical usage ratio

    • 0.3–2.0% of functional core or matrix mass, varied per target material electronic performance metrics

    Downstream process integration

    • Engaged in C–N bond formation or condensative attachment to π-systems
    • Processed in inert or anhydrous conditions to maximize electronic purity
    • Final integration by spin-coating, solution casting, or drop-dry deposition for device fabrication
    • Material stability confirmed via TGA/DSC or device test runs

    Final product types

    • Organic semiconductor test chips
    • Pyrimidine-functional device substrates
    • Chemical sensor material films
    • Polymer-embedded functional additives
    Free Quote

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    Certification & Compliance
    More Introduction

    4-Amino-6-Hydroxypyrazolo[3,4-D]Pyrimidine: Bringing Purity to Discovery

    Why 4-Amino-6-Hydroxypyrazolo[3,4-D]Pyrimidine Matters

    Creating high-quality specialty chemicals takes more than just following a recipe. Over years of chemical synthesis, you learn which materials hold up under scrutiny during pilot trials or in downstream use. We manufacture 4-Amino-6-Hydroxypyrazolo[3,4-D]Pyrimidine with a firm commitment to consistent purity and reliable batch profiles. Each lot exits the reactor on the back of real hands-on work—monitoring each stage, checking intermediates, and making adjustments the textbooks can’t always anticipate. The payoff reflects in lower trace impurities and batch-to-batch performance that research teams and formulation chemists can lean on.

    Our shop doesn’t start with fancy marketing promises. Teams from drug discovery, core intermediates, or diagnostic manufacturers have asked about stability in storage and performance across synthesis. The way we build every batch traces to these practical concerns. There’s nothing theoretical about the impact water content or residual metals can have on a sensitive downstream reaction. Years of scale-up and regular interaction with large-volume users taught us the pitfalls and fixes: careful control of drying and tight segregation of tools that come in contact with precursors or product, constant validation of QC practices, and patience in recrystallization—especially with heterocycles. These habits stick after you hear how a small impurity threw off an entire project.

    Model and Real-World Specifications

    Our current model for 4-Amino-6-Hydroxypyrazolo[3,4-D]Pyrimidine meets the needs seen most often in medical and agrochemical research. Scale ranges from hundreds of grams in early trials to multi-kilo quantities for established projects. Each production run targets at least 99% assay by HPLC, with regular checks by NMR to confirm structure. Solubility profiles, moisture content, and particle size distribution matter because these shape not only processability but also reaction pathways downstream.

    Packing up this compound isn’t just a matter of filling jars. Air, light, and even the packaging material can trigger stability concerns in sensitive nitrogen heterocycles. Real feedback from teams working in hot, humid regions led us to double-layer packaging and inert-atmosphere sealing for larger orders. These aren’t afterthoughts—they come from seeing products lose potency or transform during storage at customer sites.

    Beyond the Standard: What Sets Our Material Apart

    4-Amino-6-Hydroxypyrazolo[3,4-D]Pyrimidine often gets lumped in with a wide family of pyrazolopyrimidine scaffolds. In actual manufacturing settings, subtle differences in ring substitution or formulation can change everything: solubility, reactivity, or compatibility with certain synthetic steps can swing on single atom changes or traces of isomers. Over time, we’ve taken apart failed syntheses from downstream partners and traced the issue back to small but crucial differences in input material. Soft, vaguely defined products become headaches in scale-up. Chemically, our focus fixes on delivering clean, single-component material with well-documented spectra accompanying every lot. Every month brings calls for modifications—a tweak to the amino group, a shift to methyl or nitro derivatives—but the foundation remains delivering a product that performs predictably and keeps surprises out of critical paths.

    Some producers chase faster throughput by bumping up reactor loads or reducing recrystallization time. Experience shows this move usually brings higher color, more undefined residue, or challenging coarse particles. When we started batch-testing finished material with simulated-use protocols—actually running reactions under customer conditions—the findings showed that shaving an hour here or a drying step there created headaches down the line. Rigorous approach means slower cycles sometimes, but it also means teams spend less time debugging unexpected results from their intermediate batches.

    How Practical Experience Underpins Quality

    No two production runs end exactly the same. Seasonal humidity, batch size, and even minor changes in upstream solvents can all affect finished product specs. Real-world chemistry doesn’t always fit tidy predictive models. We grew a practice of maintaining traceable records, not just out of regulatory necessity but out of habit born from years of answering to end-users. Every time an anomaly crops up—unexpected moisture pickup or off-standard color—we run soak tests, revisit drying curves, and, if need be, overhaul entire steps in the process. Peers in pharma or crop science appreciate getting on the phone to talk through these details.

    Our chemists spend as much time in conversation with QC partners and customers as they do at the bench. Someone, somewhere, inevitably comes calling about a deviation, and it helps to have logs, spectra, and batches of experience ready to go. That’s often where next-level improvements are born—from practical troubleshooting after a late-night call about a failed coupling or a stopped pilot run.

    Application: From R&D to Scale-Up

    Most interest in 4-Amino-6-Hydroxypyrazolo[3,4-D]Pyrimidine starts in research. Drug discovery groups, screening for kinase inhibitors or antimetabolite analogues, keep us busy with small-volume, high-purity deliveries. As projects progress, requests shift to kilo or multi-kilo orders, driven by expanded screening, regulatory batch runs, or pilot plant requirements. Some teams in Asia focus on generics or process improvements, asking for compendial documentation alongside routine shipments. Feedback regularly leads us to tweak packaging or recheck analytical profiles.

    Our material stands up to actual use. A recent customer in mainland Europe battled hydrolysis in a late-stage reaction, wasting weeks on troubleshooting. Their QC flagged an issue with microcrystalline contamination. Old habits from early career days prompted us to dust off a classic, staged-filtration check during pre-shipment, and we caught the problem before it hit downstream. That customer shipped back photos showing clear, particulate-free reaction slurries using our new stock. These are the stories that drive small but meaningful process changes factory-wide: swapping out filter media suppliers, retraining operators on wash protocols, or adding an extra visual inspection step after drying.

    Comparisons and Choices: How It Differs from the Pack

    In the broader world of pyrazolopyrimidines, small changes echo in big ways. The 4-Amino-6-Hydroxypyrazolo[3,4-D]Pyrimidine scaffold delivers a different blend of hydrogen bond donors and acceptors, creating unique stacking, solubility, and overall bioactivity patterns. Downstream applications in pharma, crop science, and diagnostics often call for these nuances. Our concentrated attention to assay, color, and impurity profile distinguishes our material from generic routes flooding the secondary reseller market. Customers who tried generic material from non-specialist sources usually see variable melting points, off-label colors, and inconsistent handling claims. Labs swamped by rejected batches or process hiccups tell us it pays off to trace the source and talk directly to manufacturers. If a problem crops up, there’s an actual bench chemist at our end who can investigate lot conditions, share data, or suggest process changes for better use.

    Customers working in regulated industries—where trace impurities or uncertain batch history threaten program timelines—demand more than spec sheets. The documentation and support accompanying our material grew out of hard-earned experience. As demand for traceability climbs, more researchers value direct access to production records, spectra, and process flow data that only a manufacturer can provide.

    Supporting Real Solutions, Not Just Shipments

    Staying close to real users proves that packaging, technical support, and transparency around specification shifts drive long-term relationships. We host twice-a-year reviews with several of our larger partners, collecting data on unexpected retention, yield, or conversion issues. Our own teams recall a project where a simple packaging change (from high-density polyethylene to specific amber glass) quartered the product loss during long trips through tropical climates. Our operators now log packaging selection alongside production details. This level of detail often outweighs price differences, especially when lost batches or weeks of resynthesis stack up.

    We refuse to rush output at the expense of traceability. With high-value, nitrogen-rich heterocycles, the risk of trace contamination—residual solvents, metals, or dust—tends to rise whenever process shortcuts are taken. Staff training doesn’t just check boxes; it rests on the lessons learned from real operational failures. A damaged liner, a skipped pH wash, or too-short drying—any of these can show up as confusion during a chromatographic analysis months later. Factory discipline means catching these before a customer ever sees them.

    Sustaining Trust: Building on E-E-A-T Principles

    Manufacturers don’t get to hide behind buzzwords. Tough questions come from audit teams, not just procurement, and improving manufacturing integrity means opening up books, logs, and actual production histories. Traceability, consistency, and hands-on responsiveness back up our long-standing customer relationships far more than marketing copy ever could.

    Years of fielding questions and fixes from real production partners shaped our approach. Once, a contract lab discovered a recurring micro-impurity in an unrelated reference standard using equipment also cleaned with reclaimed solvents. Our response—a full facility audit and investment in single-use disposables—cut that impurity rate to zero. Experience, backed by actual operations, lets us avoid theoretical answers and stand by practical fixes. Whether a researcher needs support troubleshooting LC/MS results or a process developer needs to trace batch conditions, our priority is to provide clear, factual, and documented answers.

    Growing with User Needs: Innovation on Demand

    Bringing new derivatives or grades to market doesn’t start on paper. We routinely get chemistry challenge requests—trials for new salts, co-crystals, or functional group modifications. Most times, no off-the-shelf process exists, and our development lab works up from grams to commercial scale. Each trial reveals limits: solubility curves that diverge from literature predictions, need for slow cooling or tailored crystallization, or unforeseen instability pockets. We don’t sugarcoat the effort required; every innovation needs robust analytical support and patience at the bench. Over the years, we built a strong internal know-how library—every failed run, every odd impurity catalogued, every fix documented. Teams value this transparency: not everything works, but our record shows what does.

    Several extended research partnerships began with a single challenge batch. The teams came back year after year, refining protocols, targeting new analogues or process improvements. Our lab staff has presented at both industry meetings and joint review sessions, sharing insights straight from the floor—side-by-side with customer chemists. Both parties learn. That two-way flow drives incremental quality gains, from optimizing reaction yields to innovating on green chemistry approaches for legacy steps.

    Responsible Handling and Future Provenance

    Handling and shipping sensitive chemicals never counts as a background job. Our logistics and documentation teams double-check every step, ensuring cold chain protection, ADR-compliant labeling, and rapid response to any in-transit concern. Close cooperation with freight teams, regulatory consultants, and packaging suppliers grew from hard lessons—confusion over labeling once nearly stalled a time-critical delivery. Since then, full digital tracking and pre-ship verification ensure each order moves safely and swiftly.

    As environmental regulations tighten, future-proofing our production methods stays high on the agenda. Our environmental team preemptively audits effluent streams, tracks solvent recovery rates, and updates waste management protocols—long before regulators start asking. Every innovation targets minimizing resource footprint, reducing waste streams, and advancing support for partners working toward sustainable production chains. For every lot of 4-Amino-6-Hydroxypyrazolo[3,4-D]Pyrimidine, lifecycle tracking and environmental impact statements continue to be updated, deploying the latest practices in compliance and stewardship.

    Listening, Learning, Improving

    An effective manufacturer grows alongside the industry. Regular engagement with customers, academic groups, and process engineers drives continuous improvement on new grades, formulations, analysis updates, and application methods. We see the compound’s role evolving in next-generation drug design, computational biology, and advanced crop science platforms. Each new client, each new project, brings a learning opportunity—be it new application contexts, modified spec requirements, or batch-handling innovations.

    Direct engagement, clear documentation, and open lines for troubleshooting stay at the core of how we build trust. Most of all, the willingness to acknowledge mistakes, adapt processes, and invest in long-term solutions sets manufacturing partners apart from resellers or third-party sourcing channels. The evolution of 4-Amino-6-Hydroxypyrazolo[3,4-D]Pyrimidine’s quality, availability, and industry applications reflects these principles in action—no shortcuts, no abstract promises, just consistent effort, genuine expertise, and a commitment to real-world results.

    Conclusion: Delivering More Than a Product

    4-Amino-6-Hydroxypyrazolo[3,4-D]Pyrimidine stands as more than a reagent in our portfolio. Years of investment in process control, analytical rigor, application knowledge, and direct customer support flow into every bottle and sack leaving our facility. Real-world experience, documented transparency, and ongoing improvements back up every shipment. Teams in pharma, crop science, and diagnostics trust products that arrive as specified, with every analytical trace, and a team ready to answer the tough questions. As manufacturing partners, we ensure tomorrow’s breakthroughs get the reliable foundation they need today.