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3-Hydroxycoumarin

    • Product Name 3-Hydroxycoumarin
    • Alias 3-Hydroxy-1-benzopyran-2-one
    • Einecs 201-972-5
    • 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
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    Specifications

    HS Code

    615389

    Chemical Name 3-Hydroxycoumarin
    Cas Number 1076-38-6
    Molecular Formula C9H6O3
    Molecular Weight 162.14 g/mol
    Appearance White to off-white powder
    Melting Point 186-188 °C
    Solubility Slightly soluble in water, soluble in alcohol and ether
    Iupac Name 3-hydroxy-2H-chromen-2-one
    Pubchem Cid 68554
    Smiles C1=CC2=C(C(=O)OC2=C1)O
    Inchi InChI=1S/C9H6O3/c10-7-5-11-9-4-2-1-3-6(7)8(9)12/h1-5,10H
    Synonyms 3-Coumarinol, 3-Hydroxy-2H-1-benzopyran-2-one

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

    Packing & Storage
    Packing A 25g amber glass bottle, tightly sealed, labeled "3-Hydroxycoumarin, 25g, CAS 1076-38-6," with hazard and handling information.
    Shipping 3-Hydroxycoumarin is shipped in tightly sealed containers to protect from moisture and light. Packaging complies with regulations for chemicals, including appropriate labeling and documentation. The product is handled as non-hazardous under normal shipping conditions, but standard safety precautions are taken during transport to ensure product integrity and user safety upon arrival.
    Storage 3-Hydroxycoumarin should be stored in a tightly sealed container in a cool, dry, and well-ventilated area, away from direct sunlight, moisture, and incompatible substances such as strong oxidizing agents. Keep the container tightly closed when not in use. Store at room temperature and ensure proper labeling to prevent mix-up. Follow standard chemical storage protocols for laboratory chemicals.
    Application of 3-Hydroxycoumarin

    Applications of 3-Hydroxycoumarin in Industrial Manufacturing

    As a specialist manufacturer of 3-Hydroxycoumarin, we supply this intermediate for direct integration into advanced manufacturing in the chemical, pharmaceutical, and materials sectors. Below we outline core applications and technical requirements for industrial production.

    1. Pharmaceutical Intermediate for Anticoagulant APIs

    3-Hydroxycoumarin acts as a primary scaffold in the synthesis of several coumarin-derived anticoagulant active pharmaceutical ingredients, particularly those in the 4-hydroxycoumarin class. API manufacturers utilize this intermediate for step-growth synthesis processes to yield compounds such as warfarin and acenocoumarol. Precise control of impurity profiles and metal content is necessary to meet drug master file requirements. End-user specifications require confirmation of polymorphism and particle size due to impact on downstream crystallization and formulation.

    Industry compliance standards

    • ICH Q7 GMP Guidelines
    • USP, EP, JP monographs (related to end APIs)
    • FDA and EMA impurity profile requirements
    • ISO 9001:2015 for raw material traceability

    Typical usage ratio

    • Applied at 0.8–1.2 molar equivalents in small-molecule synthesis; adjusted based on starting material stoichiometry and target API yield

    Downstream process integration

    • Introduced during initial ring assembly or via condensation in process reactors; undergoes subsequent alkylation, hydroxylation, or carboxylation steps prior to API isolation and purification

    Final product types

    • Warfarin tablets
    • Acenocoumarol oral drugs
    • Phenprocoumon finished dosage forms
    • Bulk API powders for direct tablet compression

    2. Fluorescent Probe Manufacturing for Biolabeling Reagents

    Chemical manufacturers use 3-Hydroxycoumarin as a core precursor in the synthesis of fluorescent probes for biolabeling, cell imaging, and molecular diagnostics. The material provides a chromophoric backbone that, after site-specific modifications, yields probes with distinct excitation and emission properties. Process yields depend upon controlled substitutions at the 3-hydroxyl and 4-position, monitored by HPLC and fluorescence spectroscopy. Stringent purification is necessary to remove non-fluorescent byproducts prior to downstream functionalization.

    Industry compliance standards

    • ISO 13485 Medical Device Quality Management (for in vitro diagnostic manufacture)
    • REACH SVHC Regulation (regarding chemical safety in analytical reagents)
    • CLP Regulation (EC) No 1272/2008 for classification & labeling
    • RoHS (for applicable device-bound probes in diagnostics)

    Typical usage ratio

    • Entry-level use at 1.0 equivalent per chromophore unit; adjustment based on desired probe brightness and quantum yield in the downstream product

    Downstream process integration

    • Integrated as the primary coumarin ring donor in condensation reactions; further processed via alkylation, sulfonation, or conjugation with biomolecules (antibodies, proteins) under inert atmosphere

    Final product types

    • Chemiluminescent assay kits
    • Fluorescent cell imaging reagents
    • DNA-binding fluorescent dyes
    • In vitro diagnostic probes

    3. Optical Brightener Intermediate for Detergent and Textile Industries

    Surfactant and detergent manufacturers employ 3-Hydroxycoumarin to synthesize optical brightener agents through ring substitution and subsequent condensation steps. The material’s ability to yield stable, water-soluble coumarin derivatives makes it suitable for large-volume production of whitening agents in textile and laundry sectors. Strict batch consistency and low residual solvent levels are critical, as impurities can affect end-user product fluorescence, washing fastness, and fiber compatibility.

    Industry compliance standards

    • OEKO-TEX® Standard 100 for textile safety
    • Regulation (EC) No 648/2004 (Detergents Regulation, EU)
    • ISO 14001 Environmental Management (for effluent and waste controls)
    • GHS-aligned MSDS for product safety in downstream compounding

    Typical usage ratio

    • Used at 5–15 wt% of total optical brightener intermediate batch; ratio may be tuned based on desired shade and intensity in finished detergent or textile product

    Downstream process integration

    • Added during the diazo or condensation stage of optical brightener synthesis; further processed for solubility enhancement and stabilized before inclusion in detergent slurry or dye bath formulations

    Final product types

    • Liquid and powder laundry detergents
    • Whitening agents for cotton and synthetic textiles
    • Paper brightening additives
    • High-brightness yarn and fabric finishes

    4. Agrochemical Intermediate for Plant Protection Agents

    Producers of crop protection chemicals utilize 3-Hydroxycoumarin as a backbone for the synthesis of botanical-based rodenticides and select herbicides. It enters as a core substrate in coupling or cyclization reactions, providing structural rigidity for bioactive molecules targeting pest or weed management. Quality parameters focus on controlled crystallinity and minimized trace element contamination to meet agricultural active ingredient requirements and downstream formulation compatibility.

    Industry compliance standards

    • FAO/WHO Specifications (for pesticide raw materials)
    • ISO 9001 for quality management in ingredient handling
    • Regulation (EC) No 1107/2009 (EU Plant Protection Product Approval)
    • GHS and CLP standards for hazard classification

    Typical usage ratio

    • Input at 0.7–1.0 molar ratio relative to final target active in rodenticide/herbicide synthesis; adjusted based on conversion efficiency and batch scale

    Downstream process integration

    • Fed into batch reactors for coupling or cyclization, followed by formulation into granules, wettable powders, or suspension concentrates after active intermediate isolation

    Final product types

    • Rodenticide grain baits
    • Weed management herbicide granules
    • Concentrated agrochemical suspensions
    • Pre-emergent crop protection mixtures

    5. Polymer Stabilizer Synthesis in Advanced Materials Processing

    Manufacturers in advanced materials utilize 3-Hydroxycoumarin to synthesize coumarin-based stabilizers and antioxidants for specialty polymers, especially in UV-curable systems and high-performance plastics. Chemists use this building block for ring-substitution synthesis, targeting thermal and photochemical stability. Rigorous QC confirms absorption spectra, particle size, and residual catalyst levels to ensure material integrity in the thermal compounding and extrusion stages of polymer processing.

    Industry compliance standards

    • ISO 9001:2015 (Quality systems for material additives)
    • ASTM D6280 and D3350 (specifications for plastic additives)
    • REACH registration (for regulatory clearance in Europe)
    • SOCMA Product Stewardship (for specialty chemicals)

    Typical usage ratio

    • Processed at 3–10 wt% depending on polymer type and end-use requirements; formulations tailored based on final application exposure to UV or thermal loads

    Downstream process integration

    • Incorporated at early melt-blend or masterbatch preparation stages; followed by compounding with polymer resin and further additives before pelletizing or extrusion

    Final product types

    • UV-resistant plastic components
    • Polymer optical films
    • Electronic encapsulation resins
    • Specialty composite panels
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    Certification & Compliance
    More Introduction

    Why Our 3-Hydroxycoumarin Stands Out in Today’s Chemical Market

    Rooted in Chemistry, Driven by Practical Experience

    In the real world of chemical manufacturing, knowing your product is not just about raw data. It’s about understanding where it fits into research, production, and innovation. We have produced 3-Hydroxycoumarin for a broad list of customers ranging from researchers in academic labs to industrial users, and every batch has stories to tell. Our journey with coumarin derivatives goes back years, and along the way we’ve seen how small changes on a molecular level can translate into big differences in use.

    Product Model and Specifications

    Our 3-Hydroxycoumarin consistently reaches high purity, and we achieve this through repeated recrystallization and precise control over reaction conditions. Each run delivers a fine, off-white crystalline solid. From the start, we track key quality markers: melting point, water content, and residual solvents. We’ve learned that even a tiny margin in organic residue carries through into final performance, especially if you’re using it in fluorescence studies or as a synthetic intermediate. The batch model we rely on prioritizes consistency, not just yield. Average purity levels by HPLC often exceed 99%. Some applications call for even tighter margins, and we scale production to meet those criteria without compromising on cost or turnaround time.

    Understanding Where 3-Hydroxycoumarin Fits

    We see 3-Hydroxycoumarin put to work in several domains. Its major calling card is the benzopyrone core, which gives it reactivity and useful fluorescence. The hydroxy group at position 3 matters more than you might expect. It adjusts electron density and allows for hydrogen bonding, which in turn opens doors in synthetic organic chemistry. Our partners in pharmaceutical labs have told us they rely on our material for creating new anticoagulant scaffolds. Also, it gets used as a probe in chemical and biological assays thanks to its strong fluorescence in the near-UV range.

    Often, researchers come to us wanting a material that dissolves fully in ethanol, DMSO, or even polar aprotic solvents like DMF. We invest time running solubility tests and tweaking drying to give them the exact physical consistency they need. This seems minor until you’re in the midst of a reaction set and a sticky batch gums up stirrers or pipettes. Over years, we have built up lab techniques for achieving anhydrous lots when someone needs them, with Karl Fischer testing on every output to confirm water below 0.1%. When the material has to enter fine chemical synthesis or biological testing, this attention pays off.

    Differences from Related Products

    We often get asked about substitutes—can 4-Hydroxycoumarin stand in, or what does 7-Hydroxycoumarin offer instead? 3-Hydroxycoumarin stands aside for a reason. Its positional isomer has an effect not just on the spectroscopic output but on the kinds of reactions it can undergo. The 3-hydroxy group at the alpha to the lactone ring creates unique sites for substitution by electrophiles. As manufacturers, we actually see the differences in yields and byproducts during macrolactonization or alkylation reactions. Subtle, but these shifts matter for building libraries of drug candidates or calibrating fluorescent markers.

    The general market stocks many coumarins, but we make a point to keep the 3-hydroxy variant tailored for cutting-edge work. Some resellers advertise broad “coumarin” blends, but these mixes confuse purity and blur outcomes in sensitive syntheses. Our experience tells us—especially for projects relying on photophysical behavior—this material cannot be replaced or casually substituted. If your application needs a distinct emission profile or a specific reactivity, ask for the analytical data; we keep full access to every lot’s NMR and MS readouts for end users who want to check.

    Practical Considerations in Use

    Every lab bench is different—some users dissolve 3-Hydroxycoumarin in methanol for fluorescent protein labeling, others need a material stable enough for reference standards in chromatography. Our team constantly gets feedback about texture, solubility, and storage. Over hot summers, we’ve seen how high humidity can cause even inert-looking solids to clump or yellow, so we package only in airtight containers with desiccant packs as a simple but essential safeguard.

    When you are scaling up reactions, the batch-to-batch repeatability becomes the strongest test of manufacturing control. We keep SOPs updated and run regular root-cause checks on any lot outside expected parameters. Using ultra-fine particle size sieves after milling helps in applications where exact weighing and homogenous mixing are critical—fine powders often behave differently in automated feeders or reactors. Experience on real-world lines taught us that particle size spreads over 100 microns can lead to problems in downstream mixing.

    Supporting Research and Industry R&D

    We’ve supplied material for analytical standards that help labs benchmark environmental samples, especially in degradation studies of plant phenolics or as markers in forensic studies. Sometimes, a customer needs gram scale for custom syntheses. Other times they need kilos for material science projects. We don’t batch together old stock to cut corners because we’ve seen the problems inconsistent lots can introduce—false negatives in diagnostics, wasted runs in high-throughput assays, or unreliable calibration curves.

    We follow regulatory updates closely. There are ongoing changes in European and Asian markets, often requiring full trace element analysis or compliance documentation. Our own records go back years, and every lot comes traceable from source materials down to the hourly personnel logs in production. This focus on traceability isn’t just compliance—it speeds up problem-solving if a customer ever sees a result outside their control range. We can quickly track back, pull data, and support troubleshooting, even months down the road.

    Career Insights: Lessons Learned on the Shop Floor

    Many years of manufacturing teach lessons you don’t find in textbooks. In the early days, minor slipups—say, failing to filter a final recrystallization thoroughly—ended up as weeks of cleanup, customer complaints, and lost trust. Lessons like these drove changes in workflow and instilled discipline in every batch. Entering new segments, it was tempting to cut lists or blend in off-spec stock, especially when raw material costs fluctuated. We resisted because every time we saw contamination issues or off-color yields downstream. Customers came back, not for low price, but for reliability and exactness.

    Every team member is involved in refining the process. We run overnight test batches, try tweaks on drying or cooling cycles, and record each result. If one operator catches a new impurity peak on HPLC, we recalibrate, re-test, and keep detailed logs for process improvement. These steps turn into knowledge we share with end users—a research team gets info about excipient compatibility, an industrial client gets advice on solvent exchanges to streamline scale-up. This loop of feedback and innovation helps us stay ahead.

    Why Specifications Matter Each Time

    Over time, we built a database of feedback: labs needing special purity grades, industrial engineers asking for non-standard particle sizes, and more stringent impurity controls for those working on next-generation biosensors. Each market segment has its threshold for what counts as “good enough.” One gram for an academic project isn’t the same as one kilogram for a pharmaceutical intermediate, so our team treats each case as its own problem to solve. This mindset changed the way we produce and package each lot. Whether you need material for synthetic transformations or analytical controls, our output stays consistent—because the lessons stay learned.

    Often, customers looking at hydroxycoumarin derivatives want detailed analytical support, so we keep a close relationship with outside labs for NMR, GC-MS, and advanced spectroscopic profiling. Routine analysis by HPLC and TLC every production cycle has cut rejections to single digits in the past year. These steps seem small, but they add up to product reliability, which research teams count on.

    Field Applications and Direct Experiences

    We’ve supported scientific teams as they mix 3-Hydroxycoumarin with other functionalized aromatics to develop new classes of antioxidants, test environmental degradation, and study photo-reactive behaviors. In pigment chemistry, users fine-tune reaction parameters using our product to optimize color stability and emission profiles. Our direct experience matching experimental results to batch production shortens the R&D cycle for those pushing the boundaries of fluorescent markers or biochemical probes.

    Recently, a major research lab used our 3-Hydroxycoumarin as a core building block for synthesizing advanced organic semiconductors. Here, sensitive applications punished even minor batch-to-batch color changes, which could stem from as little as 0.02% of chromophoric impurities. We responded by tightening our purification protocols based on their feedback, sharply reducing rejects and speeding up their development pipeline. Collaboration between manufacturer and researcher matters more in these cases than mere data sheets or catalog copy.

    Reducing Waste and Improving Sustainability

    Throughout production, we face upstream choices in raw material sourcing, energy use, and waste handling. Over the years, we switched to greener solvents in our initial synthesis steps and developed closed-loop distillation systems that cut solvent loss by 40%. The byproducts—once regarded as waste—now get reprocessed for recovery instead of burning or dumping. Every gain here means cleaner output, more stable costs, and a real impact in meeting stricter environmental rules—especially for markets tightening controls on organic process residue.

    Within the plant, energy conservation comes from basic changes: LED lighting, heat recovery off reactors, and digitizing the old paper tracking. Some upgrades may seem small, but over a year, they add up. Managing chemical manufacturing at scale calls for awareness of environmental risk as much as product quality, so we keep a close eye on both frontiers. Traceability assures customers, and sustainability assures the next generation that chemistry can progress without eroding trust or the commons.

    Recommendations for End Users

    For those handling 3-Hydroxycoumarin, we always recommend careful attention to storage and personal handling. The material is stable under dry, room-temperature conditions, but humid or light-exposed storage changes the game. Laboratories storing open jars in fume hoods may see clumping or yellowing over a few weeks, so we advise repackaging what you need and resealing the rest tightly. If long-term integrity matters, a few extra minutes of care extend the life of every gram.

    Packing and transit lessons taught us that even routine shipping routes can stress-test product stability. That’s why we engineer our own packaging—double bags, inert atmosphere flushing for sensitive lots, tamper-evident caps. The real-world rationale? Too many times we’ve seen customs delays, cargo mishandling, and warehouse humidity scrap what was otherwise a perfect batch. Lessons like these prove that the manufacturing story of a specialty chemical is really a chain of many careful steps, each one building the trust users have in our work.

    Growing With Technology and Market Needs

    Every year, more research teams worldwide join the chase for new materials in life sciences, energy storage, and advanced materials. We stay tuned to the journals and industrial forums, watching as applications for 3-Hydroxycoumarin diversify. Some buyers once ordered only small research lots but now request scalable syntheses for tech transfer and commercial pilot runs. Our facility is built to pivot, offering not just volume but adaptability—customizing drying steps, altering packaging, or offering application notes gleaned from collaboration with leading labs.

    We train staff on modern instrumentation and test every improvement against practical scenarios. Many improvements in drying, milling, and packaging came straight from customer feedback or stories from project failures that needed fixing fast. By staying open to these exchanges, we’ve managed to keep step with changing standards and the growing complexity of uses that demand high-purity, specialty coumarins.

    The Value of Experience in Chemical Manufacturing

    Years of hands-on manufacturing sharpen an appreciation for the demands downstream users face. We strive not just for product “compliance,” but for practical reliability, and that means never settling for average. A single unreliable lot canceled an entire downstream project once; that isn’t a story we care to repeat. Experience becomes a resource, more valuable than any equipment or line upgrade. Every customer story that circles back—good or bad—feeds back into the next production run.

    In manufacturing 3-Hydroxycoumarin, details build over time. The best batches come from listening, learning, and acting on real-world problems that surface only outside the sales pitch. Knowledge, when applied in sync with evolving needs, turns a specialty chemical from commodity to catalyst—helping users advance discovery, build the next solution, or simply rely on their materials with full confidence. We see the calendar turn and technology progress, but the core principle stands: quality comes from understanding and consistency, each step determined by experience and feedback.