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A-Naphthoflavone

    • Product Name A-Naphthoflavone
    • Alias 7,8-Benzoflavone
    • Einecs 219-015-4
    • 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

    689639

    Name A-Naphthoflavone
    Synonyms 7,8-Benzoflavone
    Cas Number 604-59-7
    Molecular Formula C17H12O2
    Molecular Weight 248.28 g/mol
    Appearance Yellow powder
    Melting Point 166-168°C
    Solubility Slightly soluble in ethanol, DMSO
    Purity Typically ≥98%
    Storage Condition Store at 2-8°C
    Chemical Structure Flavone backbone fused with naphthalene
    Usage Cytochrome P450 inhibitor
    Inchi Key IEZQGJDISMVISF-UHFFFAOYSA-N

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

    Packing & Storage
    Packing A-Naphthoflavone, 1 gram, is supplied in a sealed amber glass vial with a tamper-evident cap and clear labeling.
    Shipping A-Naphthoflavone is shipped in tightly sealed containers, away from light, moisture, and incompatible substances. Packages are clearly labeled and handled according to local and international regulations for chemical transport. Appropriate cushioning is provided to prevent breakage during transit, and all necessary documentation for hazardous materials is included if applicable.
    Storage A-Naphthoflavone should be stored in a tightly sealed container, protected from light and moisture. Keep it at 2–8°C (refrigerator temperature) for optimal stability. Store in a well-ventilated, cool, and dry area away from incompatible substances such as strong oxidizers. Ensure proper labeling, and limit access to trained personnel. Dispose of according to local regulations for hazardous chemicals.
    Application of A-Naphthoflavone

    Applications of A-Naphthoflavone in Industrial Manufacturing

    A-Naphthoflavone serves as a specialized additive and reference standard across several advanced manufacturing industries. Owing to its unique molecular structure and consistent quality from our controlled synthesis processes, it plays critical roles where metabolic modulation, toxicological validation, or analytical benchmarking are necessary. Below we detail real-world, end-use application sectors and specific scenarios based on current industrial practice.

    1. Pharmaceutical Metabolism Research and Drug Interaction Profiling

    Pharmaceutical manufacturers and contract research organizations utilize A-Naphthoflavone as a selective inhibitor of cytochrome P450 1A enzymes during metabolic studies. Its precise addition to in vitro human or animal liver microsome systems enables identification of metabolic pathways and potential drug-drug interactions before costly clinical trials. Our material’s purity and traceability support its use during formal ADME (absorption, distribution, metabolism, excretion) and IVIVC (in vitro-in vivo correlation) programs for both new chemical entities and generic drug development.

    Industry compliance standards

    • ICH M3(R2) Nonclinical Safety Studies
    • US FDA Guidance for Industry: Drug Metabolism/Drug Interaction Studies
    • EU EMA Guideline on the Investigation of Drug Interactions
    • GLP (Good Laboratory Practice) regulations

    Typical usage ratio

    • 0.5–10 μM final concentration in in vitro liver microsome or hepatocyte incubations; adjusted based on substrate turnover and enzyme affinity

    Downstream process integration

    • Added directly to pre-incubated liver microsomes or recombinant enzyme assays during metabolic pathway elucidation and inhibition studies

    Final product types

    • Pharmacokinetic study reports
    • Drug interaction risk assessments for regulatory submission
    • New drug candidate ADME datasets
    • GLP-compliant metabolic pathway documentation

    2. Toxicological Testing in Environmental and Food Safety Labs

    Government-licensed toxicology laboratories and regulatory research centers apply A-Naphthoflavone to characterize the induction or inhibition potential of xenobiotics on mammalian enzyme systems, particularly for environmental risk assessment of agrochemicals and food contaminants. Its use in standardized in vitro and ex vivo models ensures reliable evaluation of metabolic activation or detoxification pathways, directly supporting chemical registration and safety clearance processes.

    Industry compliance standards

    • OECD Guideline 451: Carcinogenicity Studies
    • EPA Title 40: Protection of Environment (Part 158 - Data Requirements for Pesticides)
    • ISO/IEC 17025:2017 – General requirements for testing laboratories
    • EU REACH Annex VII: Standard Information Requirements

    Typical usage ratio

    • 1–20 μM in S9 microsomal preparations or primary hepatocyte cultures, adjusted for enzyme induction protocol and exposure period

    Downstream process integration

    • Introduced at pre-determined time points in toxicology studies using laboratory rodent or fish models, as well as in vitro cell culture assays for enzyme activity benchmarking

    Final product types

    • Environmental toxicology risk assessment dossiers
    • GLP reports for agrochemical and food additive registration
    • Standardized enzyme induction test kits
    • Regulatory authority submission files

    3. Analytical Reference Standard in Instrumental Chemical Analysis

    Quality control laboratories and certified industrial testing facilities employ A-Naphthoflavone as a reference compound for HPLC, LC-MS, and GC-MS method development. Its specific UV absorbance and mass spectral signature enable accurate calibration and system suitability testing in the quantification of related aromatic polycyclic compounds or metabolic markers, facilitating precise measurement and traceability in both research and industrial release analyses.

    Industry compliance standards

    • USP General Chapter <621> Chromatography
    • ISO 17034:2016 Reference Material Producers
    • Ph. Eur. General Method 2.2.46: Chromatographic Separation Techniques
    • FDA 21 CFR Part 211 – cGMP for Finished Pharmaceuticals (Analytical Controls)

    Typical usage ratio

    • Standard solution levels at 0.01–10 μg/mL for instrument calibration; actual concentration selected per detector sensitivity and matrix specificity

    Downstream process integration

    • Added during initial instrument setup, calibration curve preparation, and in quality control sample spike protocols for batch release tests

    Final product types

    • Certified analytical calibration standards
    • Finished pharmaceutical batch release assay certificates
    • Validated instrumental test protocols
    • Industrial QC audit reports

    4. Academic and Industrial Enzyme Induction Studies

    Biotechnology companies and university research institutions use A-Naphthoflavone in gene expression and enzyme modulation experiments. By applying known concentrations to hepatocyte or recombinant cell cultures, downstream users characterize the upregulation of cytochrome P4501A and related metabolic genes, contributing to academic publications, patent claims, or development of cell line models for high-throughput screening.

    Industry compliance standards

    • OECD Test No. 455: Performance-Based Test Guideline for Stably Transfected Transactivation in Screening of Estrogen Receptor Agonists/Antagonists
    • NIH Guidelines for Research Involving Recombinant or Synthetic Nucleic Acid Molecules
    • ISO 9001: Quality Systems for Research Laboratories
    • GLP (Good Laboratory Practice) for non-clinical laboratory studies

    Typical usage ratio

    • 0.1–20 μM, selected according to cell type, receptor density, and experimental time course

    Downstream process integration

    • Added as a defined supplement to culture medium during enzyme induction assessment or in reporter gene assay systems for receptor activation studies

    Final product types

    • Validated gene expression profiling assay data
    • Custom-engineered cell lines expressing P450 1A enzymes
    • Enzyme induction screening services
    • Peer-reviewed scientific publications
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    Certification & Compliance
    More Introduction

    A-Naphthoflavone: An Insight from the Manufacturer’s Floor

    Understanding A-Naphthoflavone More Deeply

    Manufacturing brings you in close contact with each molecule’s quirks and benefits. A-Naphthoflavone, also known as 7,8-benzoflavone, stands out in our catalog both for its chemical character and practical uses. In the laboratory, you can spot it by its crystalline appearance and pale-yellow hue, but its impact goes beyond what meets the eye. In the production process, we've learned exactly what it takes to achieve pure, reliable batches. Our main offering runs at a specification of purity not below 98 percent, batch after batch. To the naked eye this looks like a small step, but decades spent fine-tuning extraction and crystallization show just how much difference small impurities make in research and application.

    Unlike some other polycyclic aromatic compounds out there, A-Naphthoflavone finds its way into many specialized research projects. Scientists depend on its selective modulation of cytochrome P450 enzymes. In the lab, nowhere else do you find its ability to act as both an inducer and an inhibitor, depending on the setup. Teams working on cancer research keep it on hand for assays measuring activation and inhibition of metabolic pathways. This compound’s story doesn’t start and end with its formula—it’s a result of careful process control and hands-on optimization. Each reaction gets monitored in real time, small adjustments separated over years of production that make the difference between a promising and a problematic lot.

    Production Nuances: What Makes Ours Different

    Every manufacturer working with organic fine chemicals faces the same challenge: reaching the highest possible levels of purity and consistency. The equipment you use, the skills of the technicians, and the control over raw material quality all play a role. In terms of A-Naphthoflavone, we invest in dense filtration, rigorous washing phases, and validated drying protocols. Each kilogram finished has been through checks at multiple stations. We never rely only on automated sensors—chemists check samples at every major stage. This isn’t only about ticking boxes to satisfy regulators—once you see for yourself how small amounts of contaminants impact research data, you stop trusting shortcuts. It doesn’t matter whether the batch size is 100 grams or 10 kilograms, every single container matches the same standards.

    Competition from less experienced labs or resellers—often rebranding third-party product—pushes an illusion of equivalence. Experience proves that cutting corners in purification crops up in the most inconvenient ways: melting point shifts, color changes, or off-target effects when used in enzyme studies. Ours comes with certificates showing recent lot analysis, including IR, HPLC, and melting point data. The reason we share this is simple—lab researchers call every year reporting problems from inconsistent product they tried elsewhere. We don’t want to make those mistakes. The right result starts with chemical integrity.

    Why End Users Count on Careful Sourcing

    Synthetic biochemists, molecular pharmacologists, and toxicologists all seek out A-Naphthoflavone for one main reason—its specificity in enzyme assays. This isn’t a molecule that you swap out for a convenient substitute. It occupies a unique position. Literature cites its role in probing cytochrome P450 1A1 and 1A2 activities, both as an inhibitor and an inducer, which lays out paths for drug metabolism studies and toxicology research. Reliability at the source matters. A research program with millions in funding might find results cast into doubt because an off-color contaminant crept into a test. From our end, preventing this makes more than business sense—it maintains trust with colleagues in university and pharmaceutical labs.

    We recall a few customer projects lost to subtle contaminants—an uncharacteristic orange cast wiped out weeks of research. Ever since, we doubled down on purification and storage protocols. Ours travels in dark glass bottles, with desiccants, vacuum-sealed, all to avoid air, moisture, and light exposure. The handling doesn't stop at the plant. We share handling recommendations from our own experience so that the product arrives at every lab as stable as the day it left our facility.

    Distinguishing Features: Comparing A-Naphthoflavone Across Suppliers

    Some buyers assume that because CAS numbers match, performance matches. This isn’t always the case. Over the years we’ve reverse-tested competitor samples, comparing their melting point, chromatographic purity, and UV absorbance. About half reveal unwanted peaks or inconsistent results in enzyme inhibition assays. In practice, these variations often trace back to solvent residues or side products from inefficient synthesis. End-users often face wasted time, extra controls, and confusion over conflicting data. Our approach involves running batch-versus-batch comparison testing and only releasing product lots meeting the same tight criteria we apply internally. Over time, this strategy led to fewer complaints and more repeat business.

    Looking at alternatives on the market, many suppliers operate more as traders than true manufacturers. They purchase finished or semifinished A-Naphthoflavone, repackage it, and move it onward without full visibility into the production steps. As a chemical producer, we handle every reaction, purification, and packing step, which means we see what happens at every stage. If a filtration step slows or a reaction smells “off,” we know and investigate instead of simply moving stock. This kind of vigilance shapes product quality in a way that can’t be substituted downstream.

    Common Applications: Real-World Demands

    A-Naphthoflavone lands in a fairly focused set of scientific investigations. Metabolic research counts on it for CYP inhibition assays. Pharmaceuticals utilize it as part of screening methods to determine how chemistries travel, break down, or resist in the body. A-Naphthoflavone’s selectivity allows for fine-tuned screening. Toxicologists use it to differentiate metabolic pathways associated with drug-induced liver injury, environmental contaminant responses, or dietary interactions. These aren’t applications where ambiguity is acceptable. Every experiment works or fails based on input quality. You could substitute a technical-grade product for less demanding research, yet for studies looking at nanomolar differences or enzyme turnover, only the highest-grade material suffices.

    Student researchers sometimes ask for small runs to validate new protocols. We offer those as well, drawing from our working stock but holding every small batch to the same analysis schedule as our larger shipments. Some academic labs attempt to synthesize their own, but we see most circle back when self-prepared samples introduce unpredictable variables. Our primary concern is to avoid unnecessary rework or misinterpretation, so we are frank about stability, solubility, and storage from the outset. Only a manufacturer who stands behind the work provides a true account of lot-to-lot consistency.

    Challenges Sometimes Seen in Handling and Use

    In the decades working with A-Naphthoflavone, we’ve cataloged a few predictable challenges faced by end-users. The product’s low solubility in water triggers the most questions. Researchers often face precipitation or incomplete dissolution in buffer systems. Over time, we advise using DMSO or ethanol as co-solvents, based on actual observed stability and reactivity in storage. Attempts to heat the product in water alone result in degradation. While A-Naphthoflavone may look stable, atmospheric moisture quickly catalyzes discoloration if handled carelessly.

    Our technical team frequently receives calls about storage mistakes—a sealed bottle opened and left at room temperature for days, or a transfer done in ambient light. Oxidative degradation follows fast. To prevent these issues, all packaging uses amber glass and moisture-control sachets. We recommend storing at 2–8°C and minimizing repeated opening. Every employee, from production to shipping, follows this practice, giving us the confidence to promise shelf-life as described in our lot release statement.

    Continued Development in Manufacturing Techniques

    Improvements over the years came from real lessons learned, not just literature. Early on, we faced issues with batch consistency, as slight temperature fluctuations during crystallization altered purity and color. Our response came by replacing legacy jacketed reactors with programmable temperature-controlled vessels and redesigning filtration to avoid cross-contamination. Each improvement gave us more predictability in melting point, a crucial marker for this compound.

    We’ve avoided adopting any single production trick as a panacea. Instead, every technician has a checklist—real hands-on time mixing, filtering, sampling, not just observing from afar. Any hint of off odors, unexpected color, or delays during washing trigger batch-level reviews. Our involvement with university studies in the past also reminded us to document everything—something we carry forward today in our quality assurance process.

    Supporting the Wider Scientific Community

    Beyond supplying product, a good portion of our time supports technical inquiries or collaborative research. If a lab needs to replicate pharmacokinetic studies published last year, we review experimental protocols to confirm matching grades and processes. Supporting published work means providing full traceability for every batch, not just relying on paperwork but verifying samples against archived material. Some groups request custom packaging or co-shipment of stabilizing agents. Meeting those needs results in closer feedback and insight into evolving trends in biochemistry and toxicology.

    We’ve also participated in multi-institutional quality validation programs. These efforts identify the limits of what current analytical testing will catch, and drive us to review not only synthesis but all handling protocols. Feedback direct from researchers—both positive and critical—helps us reshape quality criteria accordingly. On occasion, labs will submit residual solvent analysis, UV/Vis absorption curve data, and even NMR readings to double-check claims, and we openly engage throughout that process.

    Reflecting on the Human Element in Fine Chemical Manufacture

    Years spent on the floor, among reactors and analytical instruments, reveal that every routine depends on human diligence. Repetition leads to predictability. Yet, it’s the watchful eye and willingness to pause the process that truly guarantees quality. Our team has decades of combined experience, which helps us anticipate where things might go awry. We review incoming raw material certificates with skepticism until lab checks confirm everything matches specification. The people measuring, weighing, inspecting—each brings craft and caution. Quality in fine chemicals survives on this level of attention, not on slogans or marketing.

    Where many see A-Naphthoflavone as just a chemical, to us, it’s the end result of thousands of safeguards and careful decisions. The product’s value comes from both the molecule itself and the reliability built into each lot. For labs working on tight deadlines and needing absolute reproducibility, our transparency in process and willingness to explain protocols adds value beyond the purity certificate.

    Future Directions and Ongoing Commitment

    As research applications evolve, new requirements for trace contaminants testing and extended stability data come in. It’s not enough to keep doing what once worked—each regulatory change or novel research demand means rechecking existing protocols, sometimes investing in new reactors or analytics. We’ve rebuilt parts of our process a few times already in response to customer requests, and traceability for each lot now includes more data points than ever before. Our interest goes beyond the transaction. Much of our business comes from repeat customers, academic recommendations, and referrals from former postdocs.

    Requests for environmentally safer solvents, waste minimization, and energy savings in synthesis reach us every year. We experiment with greener synthesis routes when possible, making sure to validate full analytical equivalence before any procedural switchover. Reliability means not being the first to take risks with research-grade material, but being open to precise, tested upgrades. Customer feedback—sometimes a single sentence—might spark months of internal testing before modifying documentation or process. We keep every suggestion on record to inform future improvements.

    Summary: Experience Sets the Product Apart

    A-Naphthoflavone holds a respected, if somewhat specialized, place in research circles. Reliable supply comes from deep, hands-on manufacturing experience, not from shortcuts. Understanding every stage—from raw material handling through careful crystallization and packaging—makes a real difference you see in end outcomes. Precise quality, accurate documentation, thorough communication, and direct collaboration with researchers keep us improving, never standing still.