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6-Bromo-2,3-Dihydro-4H-Chromen-4-One

    • Product Name 6-Bromo-2,3-Dihydro-4H-Chromen-4-One
    • Einecs EINECS 635-741-3
    • 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

    852390

    Iupac Name 6-Bromo-2,3-dihydro-4H-chromen-4-one
    Molecular Formula C9H7BrO2
    Molecular Weight 227.06 g/mol
    Cas Number 24321-18-0
    Appearance White to off-white solid
    Melting Point 127-130°C
    Solubility Soluble in organic solvents such as DMSO and ethanol
    Smiles C1COC2=CC(=C(C=C2C1=O)Br)
    Inchi InChI=1S/C9H7BrO2/c10-7-1-2-8-9(12)3-4-13-5-6-11-8/h1-2H,3-6H2
    Pubchem Cid 259654

    As an accredited 6-Bromo-2,3-Dihydro-4H-Chromen-4-One factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.

    Packing & Storage
    Packing The 10g quantity of 6-Bromo-2,3-Dihydro-4H-Chromen-4-One is packaged in a sealed amber glass vial with a printed label.
    Shipping 6-Bromo-2,3-Dihydro-4H-Chromen-4-One is shipped in tightly sealed, chemical-resistant containers, compliant with all local and international regulations for hazardous substances. The material is protected from moisture, heat, and direct sunlight. Shipping includes appropriate labeling, documentation (SDS), and, if required, classification under UN numbers for safe and legal transport.
    Storage Store **6-Bromo-2,3-Dihydro-4H-Chromen-4-One** in a tightly closed container, in a cool, dry, well-ventilated area away from direct sunlight and sources of ignition. Keep separate from incompatible substances such as strong oxidizing agents. Ensure storage area is equipped for containment in case of spills. Use appropriate chemical-resistant shelving and clearly label all storage containers.
    Application of 6-Bromo-2,3-Dihydro-4H-Chromen-4-One

    Applications of 6-Bromo-2,3-Dihydro-4H-Chromen-4-One in Industrial Manufacturing

    6-Bromo-2,3-Dihydro-4H-Chromen-4-One serves as a core intermediate in several precision chemical sectors. Its unique molecular structure and reactivity profile allow integration into specialized synthesis, meeting stringent demands in pharmaceutical, agrochemical, and advanced materials production. Below, we outline verified industry applications based on established downstream practices.

    1. Pharmaceutical Intermediate for Anticancer API Synthesis

    Pharmaceutical companies depend on this compound as a key building block for synthesizing specific anticancer active pharmaceutical ingredients (APIs), notably targeting kinase inhibitor drug classes. In this context, the raw material undergoes substitution and cyclization steps, entering the process after early-stage core framework assembly. It supports the production of complex small-molecule drugs under regulated conditions.

    Industry compliance standards

    • ICH Q7 Good Manufacturing Practice Guideline for Active Pharmaceutical Ingredients
    • U.S. FDA 21 CFR Part 210/211 for API manufacturing
    • EU GMP EudraLex Volume 4 Part II
    • Ph. Eur. Monographs for Intermediate Purity Grades

    Typical usage ratio

    • 15–22% molar equivalent relative to the target API core structure, adjusted based on drug yield optimization and scale-up batch size

    Downstream process integration

    • Introduced post-initial condensation as a halogenated backbone for further elaboration in the synthetic sequence
    • Reacted with amination or alkylation reagents during the late stage of structural diversification

    Final product types

    • Small-molecule kinase inhibitor APIs for oncology
    • Reference standards for preclinical drug testing
    • Advanced pharmaceutical intermediates
    • Experimental new chemical entities (NCEs)

    2. Agrochemical Intermediate for Fungicide Synthesis

    Chemical synthesis companies use this chromanone derivative to manufacture triazole-based fungicides and other crop protection agents. The substrate features in the formation of heterocyclic scaffolds, essential for introducing bioactive substituents. The reaction sequence positions the bromo-chromanone immediately after core ring construction, prior to functional group modifications tailored for agrochemical activity.

    Industry compliance standards

    • FAO/WHO International Code of Conduct on Pesticide Management
    • EU Regulation (EC) No 1107/2009 concerning plant protection products
    • ISO 9001:2015 Quality Management System for chemical manufacturing
    • China GB 20665-2006 Safety Technical Specifications for Pesticides

    Typical usage ratio

    • 12–18% by mol in core synthesis phases; final dosage refined based on targeted fungicide active ingredient content

    Downstream process integration

    • Added after initial base catalysis, followed by bromo-substitution to enhance fungicidal spectrum
    • Engages in ring-closing and methylation steps for increased stability under field conditions

    Final product types

    • Systemic triazole fungicides for wheat and rice crops
    • Broad-spectrum seed treatment agents
    • Greenhouse application crop protection products
    • Registered environmental safety intermediates

    3. Intermediate for Liquid Crystal Monomer Manufacturing

    Display material manufacturers utilize this molecule in the controlled synthesis of specific liquid crystal monomers. The compound provides the required rigid bicyclic backbone, supporting precise mesogenic property tuning for high-performance nematic and smectic displays. Processing involves the introduction of the compound after initial oligomer preparation but prior to terminal group modification, ensuring critical alignment and electro-optical response in the end materials.

    Industry compliance standards

    • IEC 61249-2-21 Halogen-free Material Guidelines for Electronics
    • RoHS Directive 2011/65/EU on the restriction of hazardous substances
    • ISO 14001:2015 Environmental Management in materials production
    • JPCA-ES01 Standard for Electronic Materials

    Typical usage ratio

    • 2–6% by weight in liquid crystal pre-polymer blends, based on optical performance validation and polymerization degree

    Downstream process integration

    • Incorporated during the mid-stage of tailoring monomer characteristics
    • Serves as a nucleating agent for rigid core extension prior to end-capping

    Final product types

    • Monomers for TFT-LCD and OLED display liquid crystals
    • High birefringence liquid crystal blends
    • Photo-alignment agents in smart window technologies
    • Advanced electro-optical films

    4. Fine Chemical Intermediate for Dyes and Pigments

    Specialty chemical firms select this bromo-chromanone compound as a precursor for synthesizing complex dyes, particularly xanthene and acridone classes for plastics and specialty printing. The compound enters the sequence following initial carbonyl activation steps, participating in high-temperature condensation reactions yielding advanced chromophores with stable color intensity and improved lightfastness.

    Industry compliance standards

    • REACH Regulation (EC) No 1907/2006 for pigment intermediates
    • DIN EN ISO 9001 for quality management
    • Color Index International registration
    • Oeko-Tex Standard 100 for textile pigment safety (where applicable)

    Typical usage ratio

    • 4–10% molar input, optimized for specific dye yields and purity in high-volume batch synthesis

    Downstream process integration

    • Used after preliminary carbonyl activation as a brominated precursor in pigment backbone assembly
    • Participates in final cyclization steps to form extended conjugated systems

    Final product types

    • Brilliant dyes for plastics compounding
    • High-stability photoinitiators in UV-cured inks
    • Specialty pigment dispersions
    • Functional colorants for technical textiles
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    Competitive 6-Bromo-2,3-Dihydro-4H-Chromen-4-One prices that fit your budget—flexible terms and customized quotes for every order.

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    Certification & Compliance
    More Introduction

    6-Bromo-2,3-Dihydro-4H-Chromen-4-One: Reliable Performance Backed by Experience

    Understanding the Core of 6-Bromo-2,3-Dihydro-4H-Chromen-4-One Manufacturing

    In a modern chemical plant, every product owes its value not just to its chemical formula but also to the daily grind of consistent manufacturing and careful quality checks. Looking at 6-Bromo-2,3-Dihydro-4H-Chromen-4-One, we see a compound with a story to tell, shaped by a commitment to real-world results. This chromenone derivative stands out in both academic research and commercial innovation, a result of refined processes and worker expertise. From our vantage point at the manufacturer’s bench, it's not just about hitting purity numbers on paper — it’s about building trust in the laboratories and pilot plants that depend on reliable inputs for each run.

    The structure of 6-Bromo-2,3-Dihydro-4H-Chromen-4-One centers on a fused ring system, anchored by a bromine atom at the six position on the chromenone ring. This unique arrangement brings about significant differences in reactivity when compared to similar compounds lacking the bromine substituent. Over years of hands-on batch production, several patterns have emerged: the bromine adds heft to the molecule, boosts electron withdrawal, and causes this compound to behave differently than its non-substituted relatives. Our process ensures that these structural subtleties remain consistent — crucial for end users navigating the fine margin between reaction success and frustration.

    What Sets Our 6-Bromo-2,3-Dihydro-4H-Chromen-4-One Apart

    Each lot of 6-Bromo-2,3-Dihydro-4H-Chromen-4-One departs the plant only after it passes a rigorous set of tests in our own analytical lab. GC and NMR help us confirm that the halo-substitution appears exactly as it should. A typical assay delivers a purity above 98% — we target this because small impurities, such as by-products from over-bromination or incomplete ring closure, create headaches in downstream reactions. There’s a difference between a product that just meets spec and a product that lets chemists anticipate outcomes, batch after batch.

    We have seen many inquiries from pharmaceutical researchers and custom synthesis labs. They gravitate to this molecule for its ability to serve as a reactive intermediate in the synthesis of flavonoid derivatives, compounds with relevance in both early-stage medicinal research and pigment development. The distinctive bromo group opens doors to regioselective coupling reactions and further functionalization, producing scaffolds that can lead to new molecular libraries or tweaks on existing leads. Work with hydrogenation, halogen exchange, or Suzuki coupling has proven our material’s reliability — feedback loops with users in those fields keep our spec tight and our process lean.

    Comparative Advantages in Practical Applications

    Compared to unsubstituted 2,3-Dihydro-4H-Chromen-4-One, the 6-bromo version brings a different profile to the table. The bromine presence doesn’t just influence electronics — it changes the melting point, the solubility, and even the odors encountered in the workup stage, facts that only emerge after running the process in kilo lots. Solvent choices shift, purification steps adapt, and crystallization behavior tells a different story. For example, we have tracked notable improvements in batch filtering and yield consistency once the crystallization pathway was tailored to accommodate the heavier halogen.

    Other chromenone derivatives may attract attention for broader market appeal, but users come to us for tailored reactivity. In the hands of medicinal chemists, the 6-bromo substituent stands as a functional handle ready for cross-coupling or reductive removal under mild conditions. Scale-up teams find value in the absence of sticky by-products and the ease of monitoring each stage by TLC or LC-MS. We have watched projects switch from chlorinated analogs to bromine versions based on ease of manipulation and improved selectivity.

    One common misconception is the belief that one chromenone is much like another. Daily experience refutes this. If a process calls for a precise substitution pattern, even a small deviation in how the bromine enters or exits the molecule impacts both yield and downstream processing. Our technical team fine-tunes reaction parameters continually, drawing on real results and real user input, not just theoretical models.

    Quality Management: Learning from the Production Floor

    The techniques honed in plant-scale environments matter deeply for the character and dependability of 6-Bromo-2,3-Dihydro-4H-Chromen-4-One. We have seen firsthand the difference made by anticipating exotherms early in the bromination step, managing reagent addition rates, and guarding against over-reaction. Equipment selection is not trivial — glass-lined vessels and robust stirring help prevent hotspots and ensure control of each run. Once, resolving an issue with particle size distribution meant going beyond spec sheets to hands-on adjustment of the isolation stage. That experience now shapes how we design our workups and optimizations.

    Analytics form the backbone of our release criteria. We do not just rely on one or two tests. Typical QC includes not only proton and carbon NMR for structural checks but also HPLC for purity, residual solvent analysis by GC, and regular tests for halide content. Any unusual color shift or odor gets flagged for secondary review. Over the years, many tweaks in our purification train can be traced straight to the vigilant eyes and noses of our line staff catching issues long before they could reach a customer’s process flow.

    The Story Behind Every Batch: Manufacturing Experience in Action

    Developing consistent batches of 6-Bromo-2,3-Dihydro-4H-Chromen-4-One required patience. Plant staff reviewed data from early campaigns to spot patterns: seasonal humidity shifts would sometimes produce crystallization fouling unless monitored, and switching to a drier nitrogen sweep meant more consistent drying times. Small scale-up runs tested every processing tweak before it ever saw a full reactor. When certain runs showed trace off-odors, even though all standard tests passed, secondary distillation steps were introduced, eliminating the complaint in subsequent shipments.

    No innovation happens in a vacuum. Most improvements came by listening to customer feedback. A handful of users needed the product for scale-up beyond lab quantities and were encountering clogging during re-dissolution. Adjustments to particle size control, and a shift in the milling protocol, resolved the problem, which in turn helped other customers without them knowing. Real trust develops in these moments — through shared problem-solving, rather than just passing off static specs.

    Responsible Production: Worker Know-How Meets Safety and Sustainability

    Working with brominated aromatics demands diligence. Our operators receive routine retraining both on reaction hazards and containment strategy. Multiple containment levels help us catch stray emissions and ensure that both human and environmental safety standards are met on every batch. Routine air and water effluent checks follow strict internal rules, going beyond statutory requirements. We’ve found that periodic review of process steps — from bromine handling to solvent recovery — uncovers waste reduction opportunities and fresh options for greener chemistry. For example, reclaiming and recycling bromine reagents from process streams has slashed new material input and cut down on disposal concerns.

    We work closely with raw material suppliers, using only vetted sources whose traceability stands up to repeated scrutiny. Document trails extend all the way from the shipping dock to the operator’s workstation, closing potential loopholes in material mix-ups. These ground-level efforts ensure that each barrel of 6-Bromo-2,3-Dihydro-4H-Chromen-4-One not only meets external audit demands but holds up under the more demanding lens of long-term customer satisfaction.

    Supporting Research and Innovation in Customer Labs

    Academic teams frequently turn to our material for method development, SAR studies, and discovery chemistry. Their focus on purity and minimal batch-to-batch variance keeps us sharp. One team working on synthetic analogs for kinase inhibition shared how even minute changes in secondary impurity profiles threw off project reproducibility. Close dialogue led to a tweak in final crystallization, which made a measurable difference in their synthesis outcomes.

    Commercial groups face a different pace. Speed, cost, and certainty take top billing. We understand that delays caused by out-of-spec inputs compound rapidly: missed production windows, extra purification steps, and wasted labor often follow. Dependable supply means fewer headaches. In our experience, supporting multiple scale-up teams in parallel taught us hard lessons about project management and demand forecasting — lessons that now inform how we stage raw materials, schedule reactors, and notify customers about expected delivery timelines.

    Occasionally, we see surge demand for structurally related chromenones. The core lesson remains unchanged: small changes in substitution create large differences in application and performance. We label our lots with precision and back QC with full traceability, knowing that for many users, just one error in substitution pattern can derail months of work.

    Adapting to Shifting Regulatory and Market Expectations

    Regulation seldom sits still. New rules regarding trace halides, process solvents, and residual metals arrive all the time, especially for compounds with potential in pharmaceutical pipelines. Our technical and compliance staff stay in constant touch with evolving requirements in key markets. Documentation follows each batch — not as a bureaucratic hoop, but as a necessary guarantee for customers facing their own audits.

    As green chemistry gains a bigger voice, questions about sustainable sourcing, energy efficiency, and waste treatment become more urgent. During an internal review, we shifted one distillation column to a more energy-efficient setup, both to save costs and to respond to increasing scrutiny about emissions. Customers have signaled strong support for continued transparency and process improvements. Each adaptation adds a new layer of assurance, both for ourselves and for the people relying on what arrives in their lab.

    Fielding Questions and Concerns: Approachable Solutions from the Shop Floor

    No process or product escapes occasional questions. Users often ask about shelf life, solvent compatibility, or optimal storage conditions. Based on stored sample observations, we know that this compound keeps its form best in cool, dry areas, shielded from light and airborne moisture. Labels reflect these conditions in straightforward terms. Researchers share reports of rare sticking in high humidity, so we provide guidance based on direct plant experience.

    For labs working with novel reaction routes, practical advice often proves more useful than textbook recommendations. One customer wanted to run a sequence under non-standard conditions, concerned about by-product buildup. Cross-referencing our own pilot plant data, we proposed incremental additions and immediate TLC monitoring, which helped them avoid a major cleanup and saved several days’ work.

    What's Next: Evolving Alongside End-User Needs

    Chemistry, like any craft, rewards long-term investment and honest feedback. Every time research directions change or new performance expectations surface, we revisit and strengthen our approach to making and supporting 6-Bromo-2,3-Dihydro-4H-Chromen-4-One. Looking down the supply chain, we see a growing call for not just reliable building blocks but collaborative brainpower. Our intention is clear: continue to link the lessons earned on the production floor with the curiosity and needs of users out in the field.

    Discussions these days often center on predictability and simplified routes — reducing synthetic steps, cutting down waste, or improving throughput. Our contribution lies in steady output and the honesty to share not just strengths but also the bottlenecks and quirks of real-world manufacturing. By staying close to end users, whether in discovery, scale-up, or industrial synthesis, we help ensure that each barrel or bottle of 6-Bromo-2,3-Dihydro-4H-Chromen-4-One carries forward the best of both practical experience and scientific outcome.

    In our view, trust builds batch by batch and conversation by conversation. Each gram of product leaving the facility tells a story — of measured choices, learned corrections, and an ongoing commitment to those who rely on our work. For chemists charting new territory or optimizing old processes, we aim to supply more than just molecules: we provide the backing of a team that understands where real chemistry meets real-world challenges.