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8-Mercaptoquinoline Hydrochloride

    • Product Name 8-Mercaptoquinoline Hydrochloride
    • Alias 8-Mercapto-1-quinolinium chloride
    • Einecs 242-591-9
    • 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

    133643

    Product Name 8-Mercaptoquinoline Hydrochloride
    Cas Number 37184-73-9
    Molecular Formula C9H8ClNS
    Molecular Weight 197.68 g/mol
    Appearance Light yellow to yellow powder
    Melting Point 230-235°C (decomposes)
    Solubility In Water Soluble
    Purity Typically ≥98%
    Storage Condition Store at 2-8°C, protected from light
    Synonyms 8-Quinolinethiol hydrochloride
    Ph Of 1 Solution 3.5-5.5
    Hazard Statements Irritant (H315, H319, H335)

    As an accredited 8-Mercaptoquinoline Hydrochloride factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.

    Packing & Storage
    Packing The 8-Mercaptoquinoline Hydrochloride, 5 grams, is packaged in a sealed amber glass bottle with a clear, printed chemical label.
    Shipping 8-Mercaptoquinoline Hydrochloride is shipped in tightly sealed containers to prevent moisture and light exposure. Packaging ensures chemical stability and safety during transit. Proper labeling, cushioning, and handling precautions are applied in accordance with hazardous materials regulations. Shipping documentation includes safety data, and expedited delivery is recommended to minimize storage and transit times.
    Storage 8-Mercaptoquinoline Hydrochloride should be stored in a tightly closed container, in a cool, dry, and well-ventilated area away from incompatible substances such as strong oxidizers. Protect it from light and moisture. Store at room temperature and avoid exposure to excessive heat. Ensure proper labeling and secondary containment to prevent spills or release. Follow institutional and regulatory guidelines for chemical storage.
    Application of 8-Mercaptoquinoline Hydrochloride

    Applications of 8-Mercaptoquinoline Hydrochloride in Industrial Manufacturing

    8-Mercaptoquinoline Hydrochloride supports advanced manufacturing as a specialty intermediate, providing highly selective sulfur chemistry for both complex and targeted industrial syntheses. Below, we outline its established integration into downstream workflows across the chemicals, electronics, catalysts, and analytical laboratory sectors, with each scenario focusing on highly specific applications where this material delivers unique attribute advantages and compliance performance.

    1. Chelating Agent in Hydrometallurgical Metal Extraction

    Leading metallurgy processors utilize this compound as a chelating agent to improve selective metal ion recovery, particularly in refining and complex ore leaching operations. Its distinct sulfur-nitrogen functional groups capture trace metals under controlled pH, directly impacting extraction yields in gold, copper, and rare earth hydrometallurgy. The substance enters downstream applications during the aqueous solution treatment step, where it forms stable complexes that facilitate efficient separation during solvent extraction or precipitation. Professional operators set dosage levels by feed ore composition, balancing economic efficiency and environmental discharge requirements.

    Industry compliance standards

    • ISO 14001 Environmental Management
    • ASTM E1601 Standard Test Method for Heavy Metal Extraction
    • Local mineral processing effluent standards
    • REACH (if export to EU involved)

    Typical usage ratio

    • Generally 0.02–0.1% w/v based on total solution volume, with exact dosage adjusted according to target ion concentration and ore grade

    Downstream process integration

    • Added to leaching tanks or extraction columns following initial ore dissolution; withdrawal coordinated with metal-laden solution streams before final purification

    Final product types

    • Cathode copper
    • Gold dore bars
    • Rare earth metallurgical concentrates
    • Technical-grade metal salts

    2. Analytical Reagent for Elemental Detection

    Analytical laboratories and instrument manufacturers incorporate this material as a sensitive and selective reagent in the colorimetric and spectrophotometric detection of trace metal ions, such as mercury, cadmium, bismuth, and copper. This use leverages its ability to produce distinct chromogenic complexes in aqueous media, forming an integral part of standard protocols in food, water, and environmental sample analyses. Formulation teams standardize reagent concentrations to optimize quantification ranges and minimize background coloration, ensuring reliable instrument calibration and result reproducibility.

    Industry compliance standards

    • ISO/IEC 17025:2017 Testing and Calibration Laboratories
    • AOAC Official Methods (e.g., AOAC 973.23 for trace metals in food)
    • United States Pharmacopeia (USP) — elemental impurities testing methods
    • EPA 200.7 for water and wastewater analysis

    Typical usage ratio

    • Stock solutions at 0.1–1.0 g/L, with 0.1–2 mL added per 10 mL test aliquot, adjusted for matrix complexity

    Downstream process integration

    • Used during sample preparation before instrumental readouts (UV-Vis, ICP, AAS) in automated or manual reagent addition systems

    Final product types

    • Colorimetric test kits
    • DIY water analysis strips
    • Certified analytical standards
    • Lab protocol reagent sets for environmental, pharmaceutical, and food QC labs

    3. Intermediate for Organic Electronic Materials

    Downstream fabricators in the specialty electronics sector utilize this compound as a building block for synthesizing heterocyclic ligands in OLED emitters, advanced photoconductors, and sensor arrays. Its high sulfur reactivity and aromatic structure allow precise attachment onto extended π-conjugated molecules, crucial in the tuning of emission wavelengths, charge injection, or molecular alignment in device components. Chemical engineers dose this intermediate during pilot-scale synthesis, modifying proportions based on targeted functionalization density and solvent system compatibility for each custom molecule batch.

    Industry compliance standards

    • IPC-1752A Material Declaration Management
    • RoHS Directive for Restricted Substances
    • IEC 61249-2-21 (halogen-free electronic materials)
    • ISO 9001:2015 for specialty chemicals fabrication

    Typical usage ratio

    • 0.5–5.0 mol% of total monomeric input depending on target ligand density and reaction scale; chemists optimize ratio according to synthetic route yield

    Downstream process integration

    • Charged to reactor vessels during stagewise heterocyclic coupling or thiolation, followed by high-purity purification and further device-grade formulation

    Final product types

    • OLED emitter molecules
    • Organic TFT layer precursors
    • Thiolate-modified sensor films
    • Photoactive molecular inks

    4. Specialized Ligand in Homogeneous Catalysis

    Producers of high-value fine chemicals and pharmaceutical intermediates apply this material as a specialized ligand to modulate metal-catalyzed transformations, such as C–S bond formation, cross-coupling, and hydrogenation. This step enables improved selectivity and turnover in organometallic catalyst systems based on palladium, platinum, or nickel. Process engineers empirically determine addition ratios in pilot or production reactors, focusing on maintaining catalyst integrity while minimizing excess ligand carryover. Applications require strict adherence to batch traceability and process documentation for regulatory and customer audits.

    Industry compliance standards

    • ICH Q7 Good Manufacturing Practice for Active Pharmaceutical Ingredients
    • 21 CFR Part 211 (Finished Pharmaceuticals)
    • ISO 9001:2015 Quality Systems
    • GMP Annex 1: Manufacturing of Sterile Medicinal Products (when used in pharma intermediates)

    Typical usage ratio

    • 0.1–1.5 equivalents relative to metal catalyst, tuned by substrate load and turnover requirement; controlled under validated SOPs

    Downstream process integration

    • Metered into reaction solutions alongside metal precursors, then removed as needed after catalytic turnover ahead of API crystallization or fine chemical separation

    Final product types

    • Active pharmaceutical ingredient (API) intermediates
    • Specialty thiolated aromatic compounds
    • High-value functional polymers
    • Enantioselective fine chemicals
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    Certification & Compliance
    More Introduction

    Introducing 8-Mercaptoquinoline Hydrochloride: Insights from a Manufacturer

    Understanding Our Product from the Factory Floor

    Having spent years refining our approach to specialty chemicals, we look at every new compound as both a challenge and an opportunity. When it comes to 8-Mercaptoquinoline Hydrochloride, there’s a story that goes beyond purity numbers and CAS codes. This isn’t a commodity item stacked on a warehouse shelf; it’s the result of a series of careful decisions and expertise learned from the real-world needs of chemists and engineers. Manufacturing isn’t a matter of formula alone—every step in the production of this molecule reflects lessons picked up from the bench and from feedback sent directly from researchers and formulators.

    Our Approach to Consistency and Quality

    Producing 8-Mercaptoquinoline Hydrochloride isn’t just about reaching a chemical endpoint. From sourcing the correct precursors to monitoring the acidity during salt formation, each batch reflects hands-on involvement. We rely on high-quality quinoline materials and select hydrogen chloride with verified traceability. By screening for trace metals and regulating solvent breakdown products, we avoid problems that have cropped up in other supply streams—issues that have led to batch failures and analytical discrepancies for customers using substandard material.

    Quality is not a moving target for us. Over the years, we’ve learned that trace contamination, even at low parts per million, raises downstream issues in research and synthesis. Each drum, bottle, or bag sent out gets checked directly for parameters that matter at the application bench: particle gradation, moisture content, and residual solvents. We identify solubility changes not just by calculation but by direct measurement, since small differences change behavior in your protocols.

    Why 8-Mercaptoquinoline Hydrochloride?

    In our conversations with research partners and technical managers, we’ve seen the range of needs open wider each year. 8-Mercaptoquinoline Hydrochloride plays a central role in chelation chemistry, organometallic synthesis, and chemical analysis. Across academic and industrial labs, chemists have found this compound especially useful as a bidentate ligand in coordination chemistry. Its mercapto group binds transition metals, while the quinoline ring stabilizes many complexes that are otherwise difficult to isolate.

    Some customers enter the conversation with a clear view—they need this molecule to build up a catalyst, set up a fluorescence assay, or shield a metal center during a sequence. Other users discover it while troubleshooting a reaction with off-target reactivity or inconsistent performance in a complex matrix. We’ve worked hand-in-hand with technical teams who require performance repeatability through hundreds of syntheses. Consistency on our end, batch to batch, saves hours and often days in requalification and analytical retesting.

    Model, Form, and Delivery: Practical Decisions

    We supply 8-Mercaptoquinoline Hydrochloride in crystalline powder form, with particle size distributions characterized by laser diffraction and verified for flowability. Moisture content stays tightly controlled; drying protocols follow customer feedback on storage lifetimes and dissolution rates. Each year, the feedback loop from clients in high-throughput labs or long-term research projects shapes how we prepare our lots, whether for gram-scale benchwork or multi-kilogram pilot programs.

    Purity remains critical, but in use we’ve heard that researchers often face issues beyond the basic assay value. Trace chloride or residual organic compounds reduce reproducibility and impact sensitive downstream processes. The best route has been real communication: process technicians and QA leads from client labs talk to our production team, and we adapt cleaning cycles, storage material selection, and monitoring plans as needed.

    What Sets Our Product Apart: Field Lessons

    We stand apart from traders and bulk resellers by maintaining hands-on control of every stage. Third-party warehousing leads to product sitting past ideal shelf-life, which matters for a compound sensitive to atmospheric moisture and sunlight. We store under nitrogen when needed, and small lot production keeps turnover high and shelf time short. Each production run comes from a known source of quinoline, avoiding the cross-contamination common in outsourced packaging facilities.

    Similar compounds sometimes show up in the market under varying names, with claims about enhanced reactivity or storage stability, but as direct producers we test these claims ourselves. Some competitors add stabilizers, which might sound good on paper, but these additions alter chelating performance or compromise downstream reactions. Our practice avoids unnecessary additives, focusing on getting the actual compound to the client as cleanly as possible.

    We also notice differences in solubility and reactivity that don’t appear in the spec sheets. Batches prepared with slight solvent impurities tend to clump or dissolve erratically. We monitor the process to produce consistent lots that dissolve cleanly in your chosen solvents—reducing troubleshooting steps for the chemists at the bench.

    Supporting Research and Applications

    Research users often cross boundaries between inorganic synthesis, analytical chemistry, and environmental science. Some of the most insightful feedback we receive comes from teams developing metal sensors or catalysts that sport unique selectivity profiles thanks to mercaptoquinoline ligands. This compound serves as more than just a chelating agent; it anchors new molecular architectures for luminescent complexes and catalytically active materials. By keeping in touch with scientists at the application level, we stay current with evolving challenges—cleaner extractions, more robust catalyst frameworks, and finer separation science.

    Universities routinely request analytical-grade lots with full data annotation, including certificates of analysis with extended impurity profiles. Our production documentation covers specifics on process variance and raw materials, reflecting years of ongoing improvement. For commercial clients developing large-scale extraction processes, we offer tailored drying and packaging to meet stricter internal criteria. The shape and form matter for real downstream convenience; we discuss requirements, then tune the process accordingly.

    Troubleshooting with Chemists and Engineers

    Problems surface in unexpected ways. We’ve had calls about batch color variance and solubility curves that drift unpredictably between lots. After detailed batch investigations, we traced issues to minor differences in pH correction and trace solvent carryover. We tightened processes to exclude possible introduction of micro-impurities from glassware and mixed-metal process lines. This level of transparency lets us solve problems alongside end users, not after the fact, and helps build long-term trust.

    Handling feedback often highlights improvements missed on paper. One team reported inconsistent surface activity in solution-phase testing; our investigation found that residual washing solvent was interacting with the end-use application in a non-obvious way. This kind of discovery guides our quality checks to cover not only standard assay and impurity screens, but subtle issues that affect function in the real world.

    Such responsiveness has bred multiple collaborations, where clients share application context and we test modifications—be it drying step tweaks, additional screening points, or new packaging formats. Every update shapes the material properties in ways that never show in generic databases or supplier catalogs.

    Comparing to Related Products

    8-Mercaptoquinoline Hydrochloride stands out in its class for both purity and application breadth, but we also produce adjacent compounds that sometimes get cross-referenced by buyers new to the field. Understanding where the differences matter makes life easier for technical teams:

    We focus on staying responsive to users who need more than just a vial with the right label. Sometimes it means helping a researcher clarify which quinoline derivative fits best, or guiding a process chemist in tuning conditions for metallation steps.

    Sustainability and Safety in Production

    Our manufacturing process reduces waste by reclaiming both solvents and unused starting materials wherever possible. Regular audits of waste stream treatment ensure compliance and safety for both workers and surrounding communities. We’ve switched to closed-loop systems for solvent recovery, thanks to years of on-site studies into evaporative losses and environmental impact.

    Inside the facility, safety stays at the forefront. Every batch run includes checks for residues and byproducts that might compromise not just product quality, but the safety of our team and the end user. We adjust cleaning and waste handling to minimize operator exposure and environmental release—learning lessons from years of process data and audits following regulatory updates.

    Shipping the product to customer labs or production facilities demands just as careful a hand. We use tamper-proof containers that survive transport jolts, and packaging that shields from atmospheric moisture. Inner bags and outer boxes receive periodic review, tuned for field conditions reported from our distribution partners and direct customers.

    Regulatory and Documentation Practices

    Customers in regulated industries need not just a product, but a complete quality and regulatory package. Every lot ships with detailed certificates and process documentation. We track batch genealogy to resolve any question about source, storage, or analytical variance—making it straightforward for buyers to validate incoming material for their processes or regulatory submissions.

    We adapt to evolving regulatory landscapes concerning chemical handling, reporting, and downstream application. Our documentation team works closely with production, ensuring every release matches both technical and compliance expectations from global users.

    From lot traceability to impurity panels, our records anticipate questions from auditors, procurement officers, or research leads who need to pass stricter internal reviews. Technical teams value these practices, as missing documentation causes delays and complicates project workflows.

    Meeting the Next Challenge: User-Driven Improvements

    Direct feedback feeds everything we do. Years spent on the manufacturing floor have taught us that improvement comes less from grand redesigns than from small, continuous changes in response to user input. Comments from chemists about faster dissolution, cleaner baseline in spectroscopy, or longer shelf stability shape every production tweak.

    We bring new technology into the plant only after real-world trial—not as a marketing point, but as a response to problems surfaced from actual use. Pilot-scale tests simulate actual storage and transport, so our teams work out kinks before scaling up and shipping to clients worldwide.

    The compound’s story keeps changing, as applications in new research areas and industrial settings arise. We listen to new requirements from universities building environmental detection assays and from process chemists architecting novel synthesic routes. By rooting improvements in user reality, we achieve reliability, not just in chemical terms, but in what actually reaches the end-user’s bench.

    Closing Thoughts from the Manufacturing Line

    Manufacturing 8-Mercaptoquinoline Hydrochloride is a hands-on, iterative project shaped by the people who use our product and the people who produce it. We draw on our technical background, open lines of communication with our customers, and an unflagging commitment to getting things right—not just on a certificate, but in practice. The compound continues to unlock possibilities for chemists and engineers in fields from catalysis to analytical detection.

    For every drum or bottle that ships out of our plant, there’s a team standing behind the process, looking for ways to improve the next batch. We treat every inquiry not as a problem, but as a chance to refine our process and grow alongside the community we serve. The industry will likely keep driving complexity and new demands, but our approach—rooted in hands-on experience, real communication, and a focus on practical improvement—remains as steady as it ever was.