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2-Naphthylamine Hydrochloride

    • Product Name 2-Naphthylamine Hydrochloride
    • Alias 2-Naphthylammonium chloride
    • Einecs 200-231-2
    • 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

    168291

    Productname 2-Naphthylamine Hydrochloride
    Casnumber 137-64-4
    Molecularformula C10H10ClN
    Molecularweight 179.65 g/mol
    Appearance White to pale yellow crystalline powder
    Meltingpoint 237-240°C (decomposition)
    Solubilityinwater Soluble
    Density 1.28 g/cm³
    Odor Odorless
    Storagetemperature Store at 2-8°C
    Synonyms β-Naphthylamine hydrochloride
    Ecnumber 205-346-8

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

    Packing & Storage
    Packing 2-Naphthylamine Hydrochloride, 100g, supplied in a sealed amber glass bottle with safety label and hazard symbols clearly displayed.
    Shipping 2-Naphthylamine Hydrochloride is shipped in tightly sealed containers, protected from light and moisture. It is classified as a hazardous chemical and requires labeling per relevant transport regulations (e.g., DOT, IATA). Proper personal protective equipment (PPE) should be worn during handling, and it must be transported with documentation outlining its hazards and safety precautions.
    Storage 2-Naphthylamine Hydrochloride should be stored in a tightly sealed container, in a cool, dry, and well-ventilated area away from incompatible substances such as strong oxidizers. Protect it from moisture and direct sunlight. Label the container clearly and restrict access to authorized personnel only. Use secondary containment to prevent accidental spills and follow all recommended safety and regulatory guidelines for carcinogenic substances.
    Application of 2-Naphthylamine Hydrochloride

    Applications of 2-Naphthylamine Hydrochloride in Industrial Manufacturing

    2-Naphthylamine Hydrochloride serves as a core intermediate in several specialized industrial sectors. As a direct manufacturer, we supply to downstream partners who depend on strict regulatory compliance, precise formulation, and reliable batch-to-batch consistency. Below, we detail major application scenarios, with technical and operational insights specific to each sector.

    1. Azo Dye Intermediates for Textile and Leather

    Major textile dye houses rely on 2-Naphthylamine Hydrochloride for synthesizing azo dye intermediates, especially for deep red and maroon shades in both natural and synthetic fibers. The compound undergoes diazotization followed by coupling reactions, which require exacting temperature, acidity, and timing control to ensure purity of the dye intermediate. Leather processing plants implement these intermediates to achieve stable, colorfast results in demanding leather finishing operations subject to regulatory colorant limits.

    Industry compliance standards

    • REACH (EC 1907/2006) – Restrictions for aromatic amines in azo colorants
    • OEKO-TEX Standard 100 Annex 4 – Banned substances for textiles
    • ZDHC MRSL for brands with zero-discharge policies
    • EN ISO 20105 (Textile and Leather Color Fastness)

    Typical usage ratio

    • Intermediate conversion: 2-4% w/w based on final dye batch mass
    • Ratio adjusts up to 5% depending on chromophore target and shade intensity

    Downstream process integration

    • Add directly to the diazotization reactor post-acidification and cooling
    • Intermediate output purified by filtration before coupling with aromatic compounds
    • Standard in-line QC checks for residual amines and color yield

    Final product types

    • Sulfonated azo dye powders and dispersions for yarns and fabrics
    • Acid and direct dyes for wool and polyamide substrates
    • Finished leathergoods (bags, shoes, automotive upholstery)
    • Printed textile rolls for apparel factories

    2. Rubber Antioxidant Synthesis

    Tire and industrial rubber manufacturers source 2-Naphthylamine Hydrochloride as a precursor for specialized antioxidants used to extend product lifespan. In this segment, our material feeds into condensation or alkylation stages that create aminated stabilizers, which prevent degradation during extrusion, molding, and end-use. Producers focus on batch purity, as minor contaminants can affect tire performance, regulatory acceptance, and compliance with export market regulations.

    Industry compliance standards

    • ISO 9001:2015 Quality Management for rubber compounding
    • Automotive OEM restricted substance lists (Renault, Volkswagen, Ford, etc.)
    • REACH Annex XVII – Restrictions on aromatic amines in elastomers
    • ASTM D4676 (Standard Classification for Rubber Compounds)

    Typical usage ratio

    • Input at 0.15-0.35% w/w based on dry rubber content
    • Optimize ratio relative to sulfur donor and filler blend; higher loads possible in OTR tires

    Downstream process integration

    • Blended into antioxidant reaction vessel after primary base addition
    • Intermediate antioxidant purified, then introduced into Banbury or open-mill mixing
    • On-line analysis for amine residuals and batch viscosity

    Final product types

    • PCR and TBR tires for automotive and industrial use
    • Technical rubber goods (belts, seals, hoses)
    • Rubberized conveyor belting for mining
    • Impact-resistant mats and molded goods

    3. Synthesis of Select Agrochemical Actives

    Major crop protection chemical manufacturers use 2-Naphthylamine Hydrochloride to prepare heterocyclic intermediates in selective herbicide and fungicide formulations. In these applications, the compound enters into amination and cyclization reactions that require precise mole ratios and high-purity starting material to satisfy regulatory shelf-life and residue tolerances. Downstream processing includes careful purification to minimize byproduct formation and ensure compliance with food safety requirements.

    Industry compliance standards

    • FAO/WHO Codex Alimentarius for pesticide formulation ingredients
    • OECD Good Laboratory Practice (GLP)
    • ISO 9001:2015 (QA for agrochemical manufacturing)
    • ECHA REACH registration for agricultural actives

    Typical usage ratio

    • 1.5-3% w/w based on total reaction charge for intermediate synthesis
    • Adjusted relative to solvent system and crop-specific formulation requirements

    Downstream process integration

    • Charged to batch reactor at amination or cyclization initiation step
    • Intermediate isolated by extractive work-up and solvent exchange
    • QC includes residue analysis to pesticide technical-grade specifications

    Final product types

    • Active pharmaceutical-grade intermediates for pre-emergent herbicides
    • Technical concentrate and EW (emulsifiable concentrate) formulations
    • Fungicidal dispersible powders for cereals, legumes, and fruits
    • Biocide blends supplied to seed treatment factories

    4. Intermediate for Pigment Violet 1 Production

    In organic pigment manufacturing, 2-Naphthylamine Hydrochloride serves as a critical building block for Pigment Violet 1 (PV1), a high-performance pigment for graphic arts, inks, and coatings. The chemical participates in the synthesis through a carefully controlled diazotization and coupling protocol, followed by finishing steps that impact rheological and dispersive properties. Producers must maintain high material purity and low trace impurity levels to achieve consistent color, UV stability, and regulatory approval for sensitive graphic applications.

    Industry compliance standards

    • EN 71-3:2019 (European toy safety for coloring agents)
    • ISO 1248 (Testing methods for organic pigments)
    • GMP (Good Manufacturing Practice) for colorants in packaging inks
    • AP(89)1 European Resolution on food packaging inks and colorants

    Typical usage ratio

    • 3.5-4.5% w/w as primary amine input based on pigment crude mass
    • Small deviations allowed to fine-tune shade and hue strength for specialty applications

    Downstream process integration

    • Charged into diazotization kettle with temperature tracking and acid adjustment
    • Coupled with diaminobenzene for complete chromophore assembly
    • Final purification and stabilization for dispersibility in ink and coating bases

    Final product types

    • Pigment Violet 1 solid for ink makers
    • Offset and flexographic ink dispersions
    • Coating blends for industrial, packaging, and art paints
    • Color masterbatches for plastics compounding
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    Certification & Compliance
    More Introduction

    2-Naphthylamine Hydrochloride: A Deep-Dive from the Manufacturer’s Perspective

    Understanding 2-Naphthylamine Hydrochloride—Why Its Quality Matters

    A lot can happen between the first time a chemist draws up a reaction pathway and the point where a process is scaling up into metric tons per year. As chemists and engineers working on the frontlines of chemical manufacturing, we see both the promise and the risks embedded in every compound that leaves our reactors. 2-Naphthylamine Hydrochloride stands as a clear example, and with each lot we produce, our experience grows not just in yield, but in meeting the precise needs of researchers and downstream industries.

    The chemical itself is a hydrochloride salt of 2-Naphthylamine—giving it much greater stability and solubility compared to the free base. Whether a customer is focused on applications involving azo dye synthesis or on projects that rely on its organonitrogen skeleton, the specifics of this material impact yield, reliability, and safety in every run. Manufacturing this compound involves far more than following a recipe—we know firsthand the process demands constant vigilance and careful selection of source materials. From years of production, even minor variations in reagent quality or pH can influence output in ways that cascade across an entire campaign.

    Why End-Use Demands Drive Our Approach to Production

    Our knowledge of 2-Naphthylamine Hydrochloride does not just stem from laboratory analysis—it comes from daily contact with its end-uses. Workers in dye manufacturing and pharmaceutical research depend on us to supply a product where trace byproducts and color differences make or break subsequent chemical transformations. We have worked with pharma synthesis teams who watch for ppt-level impurities that might look trivial on paper, but create real-world trouble on their HPLC traces. We have supplied to dye formulators who saw even slightly off-spectrum lots throw off shade-matching and batch consistency weeks later in a production run.

    Specifications for our 2-Naphthylamine Hydrochloride reflect this field experience. A manufacturer can easily state melting point, purity by HPLC, or appearance, but decades in this business have taught us which numbers actually reflect performance. Impurity controls and testing protocols evolve as we learn more about new downstream processes, so our batch data stays in step with how the product is really used. When feedback comes in from a partner running pilot plant campaigns, we adjust—not in the name of sales, but because next months’ challenges will look different from last year’s.

    What Goes Into The Model and Specification Choices

    Some buyers compare suppliers based on spec sheets alone. Behind each figure on ours—assay, moisture, color, melting point—stands a lot of problem-solving. In our plant, each batch reflects raw material selection, reactor conditions, and crystallization management. Even the drying process for 2-Naphthylamine Hydrochloride makes a difference; lingering traces of solvent affect not just purity, but also how well the hydrochloride salt incorporates into downstream reaction media.

    Raw materials are not all created equal. Chloride sources can vary in trace metals if not carefully pre-screened. The naphthylamine backbone fights oxidation and light degradation, so clean handling, filtration, and storage are just as crucial as the initial synthesis. We don’t just test for what’s required on the spec—our team pulls samples for additional evaluation when a change in tank or valve design introduces a new variable. Over the years, we’ve detected unusual minor byproducts only after months of consistent lot-by-lot side-by-side testing. These are the details that never get listed in a specification, but matter to a branded manufacturer who stakes reputation and downstream value on reliable chemistry.

    Usage: Direct Experience Defines Expectations

    Many uses for this compound drift far from its original research roots. As a dye intermediate, 2-Naphthylamine Hydrochloride has anchored the creation of bright, lasting colors since before modern colorimetry existed. In our practice, this means customers must be able to predict reaction rates and yields within narrow limits batch after batch, even as source materials come from halfway around the world. As chemists working daily with these cycles, we are all-too-aware that “close enough” is never really close enough. Color purity and stability link directly to subtle batch-to-batch differences that a less-experienced supplier might overlook.

    Pharmaceutical researchers approach us with more complex requirements. Even if regulatory restrictions block some former uses, research chemists rely on consistent supply chains to support method development and toxicology studies. Our quality team saw situations where even tiny traces of oxidized byproducts left during storage destroyed experiment reproducibility. Learning from that, we overhauled part of our packaging protocols—not because regulation compelled us, but because the feedback from working scientists mattered more.

    As process engineers, there’s no shortcut. For every kilogram sent to an overseas partner, we trace back both the equipment history and supplier documentation down to batch blending and filter replacement logs. The value this creates for industrial users might not fit in a bulleted list, but the engineers and chemists at the project face do see the difference.

    Seeing Through the Differences: 2-Naphthylamine Hydrochloride and Alternative Products

    Often, customers ask about switching between the hydrochloride salt and either the free base or the sulfonated derivatives of naphthylamine. Having run experiments in both R&D and production vessels, the divergent behaviors of each form present real-world headaches and advantages. The hydrochloride salt dissolves rapidly in acidified aqueous solutions, ensuring even incorporation into downstream reactions where control over molarity and ionic strength are key. Using the free base increases volatility and respiratory exposure risks, especially during weighing and transfer stages—experience has shown the salt is much more stable over time, not to mention easier to store and handle.

    Switching to sulfonated derivatives offers clear advantages for water solubility but introduces new pathways for unwanted side reactions that can ruin final product tone and storage characteristics. Over the years we have advised customers not just based on analyte structure, but on our hands-on understanding of reaction set-ups and purification requirements. We once spent weeks in cross-industry consultations after a well-intentioned process change—presumably trivial at the bench—triggered a wave of color shifts and higher decomposition in downstream applications. Relying on technical literature alone never gives a full picture: only a manufacturer deeply invested in the supply chain observes how seemingly minor choices ripple through every run.

    Facing Challenges: Compliance, Handling, and Worker Safety

    Manufacturers carry a direct responsibility for safe handling—much heavier than anyone in the distribution chain. In the past, 2-Naphthylamine compounds faced tighter restrictions and scrutiny because of established health risks. This reality means every member of our operations team receives regular, evidence-based safety training. We review inhalation limits, spill control, and exposure pathways using the latest industry data and our plant’s own incident records. Implementing improved dust containment across charging stations drove a measurable reduction in airborne contaminants, a detail too often overlooked outside the plant itself.

    Handled correctly, 2-Naphthylamine Hydrochloride can serve as a reliable building block. Mishandled, it presents risks both to our workers and partners along the chain, who depend on honest safety data and proven process methods. For years, we have worked with health and safety consultants to sequence tasks, redesign ventilation, and improve PPE protocols. Each improvement comes not from theory, but from real accidents and near-misses—most never written up in journal articles, but remembered by those who ran the reactors and cleaned up after unexpected leaks.

    Downstream, information sharing protects research chemists, dye formulators, and other manufacturers who use our product. Our documentation details not just the usual PPE and storage conditions, but also practical incident responses learned the hard way: what to do during a power outage or if a container fails in transit. We’ve seen more confusion from unclear MSDS wording than any factor. Face-to-face client trainings, and translation of paperwork into actionable instructions, have grown into regular parts of our product stewardship program. These efforts don’t show in a purity reading, but they safeguard lives.

    Sustainability By Necessity, Not Just Choice

    Few chemical producers can ignore the sustainability conversation. Making 2-Naphthylamine Hydrochloride today involves more than just efficient conversion. Raw material sourcing, energy consumption, wastewater management, and even final packaging fall under stricter environmental checks, driven by local and international expectations. We welcome these challenges, because each constraint steers us toward less wasteful and more productive chemistry. Plant upgrades over the last decade—including closed-loop solvent recycling and improved heat integration—lowered energy costs and reduced emissions. Our commitment goes beyond marketing slogans: reduced discharge limits and routine water monitoring started years before external certification programs gained momentum.

    Suppliers with no stake in the manufacturing process can’t argue for process tweaks that save both carbon and cash; this motivation only comes from living with boilers, scrubbers, and solvent tanks day in and day out. We review every new batch not just for quality, but also for compliance with environmental goals. Both regulators and end-users deserve a product that leaves a smaller environmental footprint. Improving yields, fine-tuning batch sizes to real customer needs, and minimizing waste all flow naturally from running our own reactors.

    Lean Manufacturing: Responding to Real Market Demands

    Market cycles and research agendas rarely stand still. As new dyes or pharmaceutical precursors are identified, demand for 2-Naphthylamine Hydrochloride jumps or falls abruptly. In the past, many suppliers maintained large stockpiles, but inventory risks—regulatory and financial—drive modern producers toward leaner, more responsive manufacturing. We routinely scale batch sizes, adjusting to market signals, customer forecasts, and even emergency stoppages on the fly. This requires close coordination between sales, logistics, and production, and only an in-house manufacturing team can keep pace at the speed demanded by today’s market.

    We’ve weathered rapid changes in shipping regulations and customs restrictions, especially for sensitive classes of chemicals. Real-time feedback from our dispatch and warehouse staff, plus careful monitoring of global logistics trends, shield us from many disruptions that hit less-experienced producers. Shipping 2-Naphthylamine Hydrochloride also means building trusted travel routes with haulers who know how to handle chemical containers and respond to emergencies—the kind of reliability that only years of trial and error can teach. Each customer delivery stands as proof: lean supply works only as well as the plant and the people behind it.

    Quality Control Never Stops at the Lab

    Classic QA/QC programs set limits, run tests, and release batches, but our experience teaches that control systems must adapt with each process evolution. HPLC data and melting point checks show the essentials, but for long-term project success, we look beyond passing numbers. Annual process audits target the recurring sources of minor anomalies—unexpected color drift, speck contamination, or delayed product release. Our chemists cycle through training and refresher workshops, learning new analytical techniques just as our QC laboratories receive updated equipment. Customer input feeds back into our controls directly, so persistent field complaints result in root-cause work back at the manufacturing level, not at an impersonal desk somewhere else.

    On several occasions, feedback from a technical user caught small issues—slight increases in dissolved iron, micro-batch cross-contamination from shared filters, awkward package sizes that created unused leftovers for lab users. These tips helped us tighten process parameters, remake filtration sequencing, and redesign packaging. This dialog is what separates a commodity from a fit-for-purpose industrial input. We’re open to continual learning because the reality of chemical production never sits still.

    The Real Value of Experience in Chemical Manufacturing

    Many in the chemical business have learned the hard way that written procedures fail if they lack lived experience. Our production leaders have spent years watching for the nearly-invisible warning signs that a reaction may go sideways. Team members gain deep familiarity with not just the chemistry, but the process dynamics, machine wear, and temperature shifts that influence each grade of 2-Naphthylamine Hydrochloride leaving our site. By keeping our manufacturing under one roof, we take accountability for those subtleties.

    Feedback from long-term collaborators has taught us that consistency, honesty, and technical rigor cannot be replaced with promises or paperwork alone. Small process changes, perhaps in a crystallizer chiller controller or a new filter press gasket, may look insignificant on a spreadsheet, yet can send ripples through every downstream operation. We capture those lessons not just in manuals, but in the day-to-day culture of our shop floor—built from a long chain of problem-solving sessions, operator meetings, and customer consultations.

    There’s No Substitute for a Manufacturer’s Commitment to Stakeholders

    Handling 2-Naphthylamine Hydrochloride responsibly takes more than compliance or technical skill. Each downstream user—whether focused on dyes, research, or pharma—is a partner whose experience feeds back into continuous improvement. Our obligation goes beyond shipping high-purity materials; it covers worker safety, regulatory alignment, real-time technical support, and shared learning on new applications.

    Manufacturing experience gives us tools to advise on best practices for integration of the material into all kinds of workflows. Our ability to troubleshoot, educate, and guide customer processes draws on thousands of hours spent making, packing, and handling this compound. End-users from varied industries approach with different needs, but all share the same frustration when a raw material falls short. We have seen success comes not from hitting minimum spec, but from exceeding what the market expects and responding rapidly to change.

    The world doesn’t slow down for process engineers or for the facilities team that keeps manufacturing humming. Meeting these challenges demands a deep bench of technicians and chemists who know not just what could go wrong, but how to retool a process so risks never become realities. Our experience as a 2-Naphthylamine Hydrochloride manufacturer is shaped by hands-on trials, industry engagement, and a willingness to evolve alongside the best in the field. Every day, we use these lessons to deliver value that books and spec sheets alone cannot capture.