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2-Chloro-3-Ethylbenzoxazolium Tetrafluoroborate

    • Product Name 2-Chloro-3-Ethylbenzoxazolium Tetrafluoroborate
    • Alias Herbert's Reagent
    • Einecs 629-418-0
    • 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
    VTB
    Specifications

    HS Code

    411032

    Productname 2-Chloro-3-Ethylbenzoxazolium Tetrafluoroborate
    Molecularformula C9H9BClF4NO
    Molecularweight 273.43 g/mol
    Casnumber 149992-84-9
    Appearance Light yellow crystalline powder
    Solubility Soluble in polar organic solvents
    Meltingpoint 140-144°C
    Purity Typically >98%
    Storageconditions Store in a cool, dry place, tightly closed
    Reactivity Reacts with moisture and strong bases
    Uses Coupling agent in peptide synthesis
    Synonyms Cl-Et-BOB, Benzoxazolium tetrafluoroborate derivative

    As an accredited 2-Chloro-3-Ethylbenzoxazolium Tetrafluoroborate factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.

    Packing & Storage
    Packing Amber glass bottle, 5 grams, with a secure screw cap. White label detailing chemical name, hazard pictograms, and safety instructions.
    Shipping 2-Chloro-3-Ethylbenzoxazolium Tetrafluoroborate is shipped in tightly sealed containers, protected from moisture and light. Transport follows all relevant chemical safety regulations, including labeling and documentation. Shipping is typically via ground or air freight for laboratory chemicals, ensuring compliance with hazardous material standards to prevent contamination or degradation during transit.
    Storage 2-Chloro-3-Ethylbenzoxazolium Tetrafluoroborate should be stored in a cool, dry, and well-ventilated area, away from direct sunlight and moisture. Keep the container tightly closed and protected from incompatible substances such as strong bases and oxidizers. Use appropriate, labeled containers to prevent contamination and ensure chemical stability. Store in accordance with all local, regional, and national regulations.
    Application of 2-Chloro-3-Ethylbenzoxazolium Tetrafluoroborate

    Applications of 2-Chloro-3-Ethylbenzoxazolium Tetrafluoroborate in Industrial Manufacturing

    As a specialist manufacturer of 2-Chloro-3-Ethylbenzoxazolium Tetrafluoroborate, we supply this cationic coupling agent to performance-driven industries that demand precise molecular reactivity and batch controllability. The following sections detail established downstream industrial applications, providing context-specific technical information relevant to real production environments.

    1. Advanced Peptide Synthesis for Pharmaceutical APIs

    Pharmaceutical manufacturers employ 2-Chloro-3-Ethylbenzoxazolium Tetrafluoroborate as a peptide bond-forming reagent in solid-phase and solution-phase peptide syntheses. Utilized primarily for activating carboxylic acid groups, the compound supports the efficient assembly of therapeutic and diagnostic peptides, minimizing epimerization and by-product formation to comply with stringent impurity profiles.

    Industry compliance standards

    • United States Pharmacopeia (USP) general chapter <1047> for peptide APIs
    • ICH Q7A: Good Manufacturing Practice for Active Pharmaceutical Ingredients
    • EU GMP Part II
    • FDA 21 CFR Part 211 for finished pharmaceuticals

    Typical usage ratio

    • 0.9 – 1.5 molar equivalents relative to carboxyl group, adjusted for peptide length, amino acid load, and desired deprotection profile

    Downstream process integration

    • Introduced during amino acid coupling cycles, immediately after carboxyl deprotection and prior to base addition; compatible with both batch and continuous peptide synthesizer platforms

    Final product types

    • Peptide active pharmaceutical ingredients (APIs) for injectables
    • Diagnostic peptide sequences
    • Peptide-based drug intermediates

    2. Oligonucleotide Synthesis Reagent for Nucleotide Chemistry

    Biotechnology firms utilize this compound as a nucleic acid coupling auxiliary in automated DNA and RNA synthesis lines. Its fast and selective activation properties support high-throughput synthesis of oligonucleotides, enhancing chain elongation efficiency and reducing side reactions such as phosphoramidite hydrolysis or incomplete coupling events.

    Industry compliance standards

    • ISO 18385: Minimizing risk of DNA contamination
    • Ph. Eur. 2.10.21 Oligonucleotides
    • USP <509> Oligonucleotides
    • OECD Principles of Good Laboratory Practice (GLP) for genomics manufacturing

    Typical usage ratio

    • 0.8 – 1.2 molar equivalents per nucleotide addition, adjusted for coupling efficiency as determined by process analytics

    Downstream process integration

    • Added to solid-phase reactors during each coupling cycle stage, after detritylation and prior to capping; suited for both column and microarray-based synthesis

    Final product types

    • Custom oligonucleotide primers
    • Therapeutic antisense oligonucleotides
    • siRNA duplexes and gene-editing guides

    3. Pharmaceutical Intermediate Reagent for Advanced Heterocyclic Synthesis

    Chemical synthesis units in the fine chemical sector incorporate the compound to activate precursors in heterocycle-forming reactions, especially where mild yet highly selective activation is needed. Its utility in cross-coupling and condensation reactions allows rigorous control of regioselectivity in the creation of novel drug intermediate scaffolds with strict impurity limits.

    Industry compliance standards

    • Current Good Manufacturing Practice (cGMP) by FDA
    • ICH Q11: Development and Manufacture of Drug Substances
    • ISO 9001: Quality Management Systems for chemical production
    • REACH Regulation (EC) No 1907/2006, Annex VII

    Typical usage ratio

    • 0.5 – 1.3 molar equivalents, optimized based on substrate reactivity and reaction scale, with adjustment for moisture and air sensitivity in batch

    Downstream process integration

    • Introduced during key condensation or cyclization steps under inert gas, often following solvent exchange and in the presence of controlled moisture levels to protect product integrity

    Final product types

    • Substituted benzoxazole intermediates
    • Heterocyclic API building blocks
    • Chemical reference standards for pharmaceutical R&D

    4. Specialty Dye and Fluorescent Probe Manufacturing

    Specialty chemicals producers employ the material as an activating agent to link carboxylated dyes and amine-functionalized substrates for fluorescent labeling. Its rapid coupling kinetics support demanding production targets in dye manufacturing, especially for labels used in clinical diagnostics, high-sensitivity imaging, and flow cytometry reagent kits.

    Industry compliance standards

    • EN ISO 13485: Quality Management for Medical Devices (for diagnostic reagents)
    • RoHS Directive (2011/65/EU) for restricted hazardous substances in electronics
    • CLP Regulation (EC) No 1272/2008 for classification of chemical mixtures
    • US FDA 21 CFR Part 820 (where applicable for IVD components)

    Typical usage ratio

    • 1.0 – 1.4 molar equivalents per dye-to-protein linkage, adjusted by target label density and assessed by downstream fluorescence QC

    Downstream process integration

    • Introduced after dye solubilization and prior to purification, often under controlled low-pH or buffered conditions to ensure coupling specificity and reduce side product formation

    Final product types

    • Fluorescent dye-labeled antibodies
    • Flow cytometry and cell sorting reagent kits
    • Fluorescent tracer compounds for imaging

    5. Chemical Carboxyl Activation in Enzyme Substrate Manufacturing

    Producers of biochemical substrates for diagnostic and research use rely on the benzoxazolium salt as a reliable carboxyl group activator in the manufacture of enzyme-linked substrates and bioconjugation reagents. This facilitates sensitive detection in immunoassay and biomedical platforms, where background suppression and covalent bond stability are critical for data reliability.

    Industry compliance standards

    • ISO 9001:2015 for analytical reagent chemicals
    • Good Laboratory Practice (GLP) OECD guidelines
    • Directive 98/79/EC on in vitro diagnostic medical devices
    • REACH compliance for testing chemicals

    Typical usage ratio

    • 0.7 – 1.3 molar equivalents based on carboxyl content per batch, modulated by end-use sensitivity and substrate backbone structure

    Downstream process integration

    • Used in the activation step post-synthesis and pre-conjugation, frequently under mild aqueous-organic mixed solvent conditions with in-process monitoring for side-product minimization

    Final product types

    • Chromogenic and fluorogenic enzyme substrates
    • Immobilized enzyme-linked diagnostic agents
    • Research-use bioconjugation kits
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    Certification & Compliance
    More Introduction

    2-Chloro-3-Ethylbenzoxazolium Tetrafluoroborate: A Direct Manufacturer’s Perspective

    Real-World Experience with 2-Chloro-3-Ethylbenzoxazolium Tetrafluoroborate

    Chemical production rarely offers a one-size-fits-all path, especially when handling innovative organic reagents designed for niche reactions. With decades of practice scaling up fine chemicals and specialty intermediates, the development of 2-Chloro-3-Ethylbenzoxazolium Tetrafluoroborate (often recognized by its structure rather than a catchy trade name) stands out for its reliable stability under storage and its clean reactivity profile on the bench. Every batch goes through a custom bench-to-reactor journey: careful control of reaction temperature, precise addition of reagents, and full spectrum analysis to match rigorous in-house standards.

    The molecule itself—a benzoxazolium salt featuring a chloro substituent at the 2-position and an ethyl group at the 3-position—offers distinct applications in both academic research and industrial synthesis. We’ve watched researchers push it toward activation and coupling steps, especially in peptide chemistry or in fine-tuning the formation of amide bonds. Its salt form with tetrafluoroborate improves handling compared to other counter-ions, making it less sensitive to ambient moisture and easier to weigh out for reaction setups.

    Process Control and Quality: Going Beyond the Literature

    Over the years, many synthetic methods from research journals fall short when transferred to a plant environment. Small reaction vessels mask heat dissipation problems. Reagent quality in the open market fluctuates wildly. Raw material screening, coupled with batch-to-batch chromatographic checks, defines how we ensure that 2-Chloro-3-Ethylbenzoxazolium Tetrafluoroborate coming out of our plant hosts impurity levels consistently below 0.5%. Those are not just numbers on a report—they’re the dividing line between downstream process yields that deliver and disappointing losses difficult to trace without exhaustive troubleshooting.

    More than a decade of hands-on purification has shaped our perspective. Many manufacturers focus on simple crystallizations, but we have found that solid-phase extraction and controlled drying under vacuum prevent residual hydration that would otherwise complicate subsequent reactions. Only real-world plant experience shows what works—just as the literature recipes often skip the part about stubborn emulsions or hydrolytic side reactions appearing at scale.

    Specifications Worth Attention—Not Just Numbers

    Our chemists lean into specifics, not generics. 2-Chloro-3-Ethylbenzoxazolium Tetrafluoroborate leaves our warehouse at a purity of 99% minimum by HPLC, with a melting point recorded between 202–208°C. These are not industry averages—they reflect targeted efforts to minimize batch rejection. Color and solubility can be practical differentiators in a crowded market, but few spend time talking about them. This salt dissolves rapidly in polar aprotic solvents, supporting a range of organic transformations from activation of carboxylic acids to cyclization steps in heterocycle syntheses. Moisture content floats below 0.3%, an overlooked but crucial figure for anyone using it in water-sensitive reactions.

    At scale, every detail comes under scrutiny. Hydration, particle size, and lot-to-lot reproducibility shift millions in investment if left unchecked. Our plant operators handle each step knowing that there’s no shortcut to quality. Outbound shipments include data from FT-IR, NMR, and mass spectrometry—even if the customer never asks.

    Real-World Customer Feedback and Development Cycles

    We deal directly with chemists at the bench, not just procurement departments. One scale-up campaign for a pharma client highlighted a real pain point: microgram traces of inorganic salts from competing sources stalled their catalyst system. Investigation traced the effect to lax purification. By redesigning our workup protocol to eliminate these traces, their next trial delivered the desired conversion—avoiding weeks of troubleshooting. These conversations steer our continuous improvement cycle, motivating us to anticipate common obstacles.

    Many users put a premium on consistency. We hear it in requests for customized documentation, tailored packaging sizes, and detailed certificates of analysis. Our batch records run deep, linking every drum to its raw input source. This traceability proves beneficial not just for regulated environments, but also for the R&D lab hunting down unexpected byproducts. When you know where every kilo originated and how it was treated, troubleshooting becomes manageable, not a game of chance.

    Comparing Products—and Why Small Tweaks Matter

    Our customers often compare 2-Chloro-3-Ethylbenzoxazolium Tetrafluoroborate to its close analogs, like other benzoxazolium salts or the more widely recognized benzotriazolium compounds. Substitution patterns may sound academic, but in practice, small differences in reactivity pace and selectivity can mean the difference between a single major product and a messy mixture. The chloro and ethyl groups on the benzoxazole ring are not just theoretical constructs—they form the backbone of differentiated reactivity that advanced synthesis demands.

    We’ve seen side-by-side application trials where standard imidazolium or pyridinium-based reagents lagged in reaction rate or furnished more side products. The tetrafluoroborate counter-ion, reliably dry and non-coordinating, gives this product an edge in water-sensitive couplings and activation steps. It sidesteps many of the solubility hassles sometimes encountered with chloride or perchlorate analogs—benefits that stay hidden until you run reactions with high-value or sensitive substrates.

    It’s tempting to view these compounds as interchangeable. Over the years, we’ve learned that researchers switch suppliers, not due to headline purity but because of subtle differences: a consistently higher yield, clearer product solutions, or simplified downstream isolation. Each researcher or process engineer finds value in tangible performance improvements, often driven by nothing more than tighter control of raw materials and attention to quirks of the large-scale process.

    Safety and Handling—Lessons from Plant Operations

    Every manufacturer can cite theoretical hazards. We have learned practical lessons the hard way. 2-Chloro-3-Ethylbenzoxazolium Tetrafluoroborate poses moderate risk by standard GHS criteria but behaves predictably when handled with care. Our facilities run with closed system charging and dust extraction, not just to tick a box, but to avoid unplanned downtime from exposure or cross-contamination incidents. Over years of operation, the best way to prevent scale-related mishaps has been constant vigilance—physical barriers, monitored transfer lines, and thorough operator training.

    From field experience, we know how a tiny lapse—such as an improperly sealed drum—can trigger unnecessary delays. Moisture ingress doesn’t just swell test results, it destroys process reliability for sensitive reactions. This is the thinking behind our commitment to using lined containers, desiccant pouches, and humidity alarms on warehouse racks. These may sound over-cautious, but the cost of an aborted synthesis dwarfs the price of preventive packaging.

    Disposal and post-process cleaning matter, too. We work closely with professional waste handlers and our own environmental team to treat byproducts and packaging in compliance with evolving regulations. Having managed everything from bulk shipments to single-gram orders, we’ve built in the discipline to document hazardous waste down to the last drop—long before it makes the news.

    Supporting Process Innovation—Beyond Commodity Sales

    Providing a specialty reagent like 2-Chloro-3-Ethylbenzoxazolium Tetrafluoroborate means doing more than filling a purchase order. Discovery phase labs, process development teams, and full-scale plants need more than just a bottle. We have fielded requests to adapt the product form: sometimes shipping a coarser powder to avoid solvent losses, sometimes supplying smaller packs to cut waste during multi-step optimization.

    In several collaborations, our technical team worked hands-on with clients adjusting synthetic workflows. One medicinal chemist wanted to streamline activation for a heterocyclic core—early attempts with alternate activating reagents returned byproduct profiles that proved stubborn to separate. Switching to our 2-Chloro-3-Ethylbenzoxazolium Tetrafluoroborate and optimizing the stoichiometry delivered an almost quantitative transformation in half the previously allotted time, with negligible unwanted byproducts.

    Many process engineers only discover subtle quality issues when ramping quantities beyond the bench scale. We often recommend small pilot trials before a full campaign—this uncovers hidden risks, whether from mixing, heat-up rates, or unforeseen side-streams. We opened our plant to experienced scale-up teams and visiting researchers across the globe, learning as much from their troubleshooting as they do from our best practices. Direct dialogue sets the stage for faster innovation: measuring not just cost per kilo, but total benefit through improved process safety and product reliability.

    Sourcing and Trust—Building Enduring Partnerships

    Sourcing specialty chemicals is more than an exercise in price comparison. Over repeated orders and integrated projects, trust builds between manufacturer and end-user. We notice quickly when returning customers specify extra characterization or request nuanced packaging modifications. Trust flows from repeated deliveries that match documentation, from transparency about process changes, and from open technical discussion about performance hurdles. That’s something that doesn’t show on a data sheet.

    Years of ground-level experience taught us that shortcuts erode trust quickly. We verify every raw material shipment, keep process logs accessible, and flag even minor specification drifts on batch records. Our team sees these standards as normal: it’s what lets us deliver specialty products like 2-Chloro-3-Ethylbenzoxazolium Tetrafluoroborate to sectors as demanding as pharmaceutical intermediates, agrochemical development, and advanced materials research.

    On rare occasions, disruptions in global logistics create delays. We have invested in local raw material storage and developed swaps with other chemical plants to keep critical projects on track. Flexibility in manufacturing planning ensures our partners in research and production receive steady supply even when markets wobble. No surprises, just reliable delivery.

    Responsiveness to Regulatory Changes and Sustainability

    Regulatory expectations around specialty chemicals climb every year. We monitor emerging standards not just to stay compliant but to anticipate customer needs before they cause a bottleneck. Our documentation practice continues expanding: every kilogram shipped has been cross-referenced for substance registration, hazard assessment, and shipping compatibility. Safety Data Sheets are written and reviewed with both domestic and international regulations in mind. Many clients ask for proof of REACH or TSCA status during the vetting process—each record connects directly to validated supplier chains and in-house analytical controls.

    Sustainability is moving quickly from buzzword to starting point. We started out burning solvents in furnaces long before regulatory mandates, but the reckoning with waste minimization now drives plant decisions. Solvent recovery, maxed out reactor yields, and careful tracking of byproduct streams now stand side by side with classic process optimization. Customers in pharmaceutical and electronics sectors often ask pointed questions about process additives, waste profile, and environmental impact. Our response: open records and regular investment in plant upgrades, rather than canned statements about green chemistry.

    Continuous Learning and Knowledge Sharing

    Staying ahead requires humility and a willingness to learn. Our team regularly participates in industry symposia, standardization working groups, and joint research initiatives with major research institutes. The data we generate on 2-Chloro-3-Ethylbenzoxazolium Tetrafluoroborate gets published not only internally but shared with collaborators to drive collective progress.

    We have published insights detailing recovery strategies, impurity tracking, and troubleshooting common side reactions observed at scale. Every improvement in isolation and stability eventually surfaces as an easier, more reliable experience for those deploying this chemistry in inventive new settings. Investing in training for our technicians and plant employees keeps practical skills sharp—because core process improvements rarely arrive from management, but from the production floor.

    Final Thoughts from the Plant Floor

    Building reliable specialty reagents like 2-Chloro-3-Ethylbenzoxazolium Tetrafluoroborate means understanding where real problems crop up and solving them before they hit the end-user. All the work behind the scenes—raw material screening, tailored purification, proactive process adjustment, traceability—gets judged in the moment the chemist opens the drum and runs the first reaction.

    We don’t see our role as simply meeting a minimum spec or moving product out of inventory. Every product continues evolving because users keep pushing the boundaries of what’s possible in organic synthesis and materials research. Our best feedback arrives not in formal reports but in the phone call that says, “We tried something new, and it worked.” That’s the work of a manufacturer who stands behind each batch—chemistry, not just commerce, as the real product.