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6-Amino-2-Naphthoic Acid

    • Product Name 6-Amino-2-Naphthoic Acid
    • Alias 6-Amino-2-naphthalenecarboxylic acid
    • Einecs 202-187-7
    • 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

    283620

    Product Name 6-Amino-2-Naphthoic Acid
    Cas Number 2834-92-6
    Molecular Formula C11H9NO2
    Molecular Weight 187.20 g/mol
    Appearance Light brown to beige powder
    Melting Point 294-298 °C (dec.)
    Solubility In Water Slightly soluble
    Purity Typically ≥98%
    Pka Around 4.0 (carboxylic acid group)
    Synonyms 6-Amino-2-naphthalenecarboxylic acid
    Storage Temperature Room temperature
    Ec Number 220-614-1
    Chemical Structure A naphthalene ring with amino group at position 6 and carboxylic acid at position 2

    As an accredited 6-Amino-2-Naphthoic Acid factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.

    Packing & Storage
    Packing The 100g packaging of 6-Amino-2-Naphthoic Acid is a sealed amber glass bottle with a tamper-evident cap and clear labeling.
    Shipping **Shipping for 6-Amino-2-Naphthoic Acid:** This chemical is shipped in tightly sealed containers to prevent moisture and contamination. It is transported in compliance with relevant regulatory guidelines, labeled appropriately for safe handling. Store and ship at room temperature, avoiding exposure to strong oxidizing agents. Ensure compliant documentation and handling according to SDS recommendations.
    Storage 6-Amino-2-Naphthoic Acid should be stored in a tightly closed container, in a cool, dry, and well-ventilated area, away from incompatible substances such as strong oxidizing agents. Protect it from moisture, direct sunlight, and sources of ignition. Handle with care, using appropriate personal protective equipment, and follow all safety guidelines for storage of chemicals.
    Application of 6-Amino-2-Naphthoic Acid

    Applications of 6-Amino-2-Naphthoic Acid in Industrial Manufacturing

    6-Amino-2-naphthoic acid serves as a critical intermediate in several specialized industrial sectors, enabling advanced synthesis in organic pigment development, pharmaceutical APIs, plastic additive manufacture, high-performance dyes, and optical brighteners. As the original producer, we supply this raw material following stringent processing standards and detailed customer specifications, ensuring it fits precisely into downstream workflows.

    1. Azo Pigment Manufacturing

    Azo pigment producers rely on 6-amino-2-naphthoic acid as a diazo component for synthesizing reddish and maroon shades. Formulators couple it with specific coupling agents under carefully controlled pH and temperature to achieve precise color characteristics, lightfastness, and dispersibility suited to coatings and inks. Our grade provides batch-to-batch consistency to meet strict dispersion and stability criteria during mass pigment production.

    Industry compliance standards

    • ISO 18451-1:2015 (Paints and varnishes — Pigments and extenders)
    • REACH (EC) No 1907/2006 for pigment intermediates
    • ECHA Registered Substances for organic pigment components
    • EN 71-3:2019 (Safety of toys - migration of certain elements)

    Typical usage ratio

    • 20–32% by mole in azo pigment coupling reactions; ratio varies with desired shade intensity and tinctorial strength adjustments, dictated by the pigment type and process yield.

    Downstream process integration

    • Introduced after diazotization: dissolved and coupled with a coupling component (e.g., beta-naphthol derivatives) under controlled agitation, then isolated, washed, and milled into fine pigment powder.

    Final product types

    • Organic pigments for industrial coatings
    • Printing inks (solvent and water based)
    • Textile coloration dispersions
    • Plastic color masterbatches

    2. Pharmaceutical Intermediate for Anti-inflammatory APIs

    Producers in the pharmaceutical sector use 6-amino-2-naphthoic acid as an intermediate in synthesizing select non-steroidal anti-inflammatory drug precursors and other naphthalene-based therapeutic molecules. Controlled purity and low heavy metal content are critical, with process optimization tailored for maximum conversion and minimum impurity carryover, fully aligning with QA and cGMP requirements.

    Industry compliance standards

    • ICH Q7 (Good Manufacturing Practice for Active Pharmaceutical Ingredients)
    • USP/NF (United States Pharmacopeia–National Formulary), where applicable for intermediates
    • EU GMP Guidelines Part II
    • FDA 21 CFR Part 211 (finished pharmaceuticals)

    Typical usage ratio

    • Synthesized in batch or continuous mode as 1:1 molar intermediate. Yield is adjusted based on target API specifications and by-product minimization.

    Downstream process integration

    • Reacted in acylation or ring-closure steps for naphthylamine derivatives, forming part of the core structure in anti-inflammatory drug synthesis plants under validated SOPs.

    Final product types

    • API intermediates (e.g., for nabumetone, other naphthylamine-based drugs)
    • Pharmaceutical raw materials delivered to formulation units

    3. Plasticizer and Stabilizer Additive Synthesis

    Manufacturers incorporate 6-amino-2-naphthoic acid during the production of certain specialty plasticizers and heat stabilizers for engineering polymers. The aromatic amine improves thermal and light stability, benefitting applications in automotive and technical plastic components that require long-term exposure to heat or UV. Our material meets impurity and analytical testing suitable for high-value polymer processing.

    Industry compliance standards

    • ISO 9001:2015 (Quality management for plastics processing)
    • IEC 61249-2-21:2003 (Halogen-free requirements in plastics)
    • REACH-compliant documentation for additive usage
    • RoHS 2015/863/EU if used in electronics plastics

    Typical usage ratio

    • Direct use at 0.1–1.5% by weight in polymer blends, with exact level determined by chemical compatibility testing and target stabilization performance.

    Downstream process integration

    • Added during melt-blending or compounding steps, followed by extrusion or molding; the additive integrates into polymer matrix under temperature-programmed profiles for consistent distribution.

    Final product types

    • High-performance polypropylene and polyester parts
    • Automotive electrical housings
    • Heat- and light-resistant technical films

    4. Disperse Dye Synthesis for Synthetic Fibers

    Dye manufacturers employ 6-amino-2-naphthoic acid in the synthesis of disperse dyes for polyester and acetate fibers. This intermediate yields dyes with good substantivity, washing fastness, and color uniformity, crucial for textile dyehouses specializing in synthetic material coloration. Process engineers select it for its control over particle size and solubility under high-pressure dyeing conditions.

    Industry compliance standards

    • OEKO-TEX STANDARD 100 (textile dye chemical safety)
    • ZDHC Manufacturing Restricted Substances List (MRSL)
    • CFR Title 40 (EPA regulations for dye manufacturing waste)
    • GB/T 21866-2008 (Chinese national standard for synthetic fiber dyes)

    Typical usage ratio

    • 12–24% molecular ratio in multi-step dye synthesis; operators optimize dosage depending on depth of shade and fiber applications.

    Downstream process integration

    • Condensed with select coupling agents to form mono- and di-azo disperse dyes; processed to control crystallinity and filterability for jet dyeing and padding plants.

    Final product types

    • Disperse dyes for polyester fabrics
    • Dye concentrates for textile printing
    • Fiber-specific dye formulations for automotive and apparel textiles

    5. Optical Brightener Base Material

    6-Amino-2-naphthoic acid acts as a precursor in the synthesis of certain optical brighteners used in detergents, paper, and textile finishing. Its naphthalene core contributes to strong light absorption and fluorescence. Industry chemists tailor its transformation in multi-step syntheses to meet regulatory and performance targets for whitening efficiency in final goods.

    Industry compliance standards

    • ISO 9001:2015 (Manufacturing management in optical brighteners)
    • EU Detergents Regulation (EC) No 648/2004 for detergent ingredients
    • FDA 21 CFR 176.170 (optical brighteners in food contact paper)
    • GB/T 20811-2006 (Chinese standard for fluorescent brighteners in textiles)

    Typical usage ratio

    • 8–20% molar input in initial step, adjusted for targeted fluorescence intensity and end-use application (e.g., solid vs. liquid brightener formats).

    Downstream process integration

    • Reacted through sulfonation and condensation, then purified and standardized for particle size and activity; supplied as a base for further blending or direct use.

    Final product types

    • Optical brighteners for liquid and powder detergents
    • Papermaking whitening agents
    • Textile aftertreatment brightener baths
    Free Quote

    Competitive 6-Amino-2-Naphthoic Acid prices that fit your budget—flexible terms and customized quotes for every order.

    For samples, pricing, or more information, please call us at +8615371019725 or mail to admin@sinochem-nanjing.com.

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    Email: admin@sinochem-nanjing.com

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    Certification & Compliance
    More Introduction

    Introducing 6-Amino-2-Naphthoic Acid — An Essential Intermediate from an Experienced Manufacturer

    From Factory Floor to Laboratory Bench: What Sets 6-Amino-2-Naphthoic Acid Apart

    At our chemical manufacturing site, nearly every batch of 6-Amino-2-Naphthoic Acid starts with nothing more than raw aromatic hydrocarbons and an expectation for uncompromising consistency. Technicians keep a close eye on each stage, not just because it’s company policy, but because it’s the only way to deliver the purity researchers and industry expect.

    6-Amino-2-Naphthoic Acid, with its formula C10H9NO2, has always held a practical appeal for us and our customers. The compound looks simple on paper—a naphthalene ring anchored with an amino and carboxylic acid group—but small changes to those groups produce big changes in behavior. Downstream users in the pigment, pharmaceutical, and dye spaces trust us exactly because we keep even low-level impurities in check.

    Each drum of our 6-Amino-2-Naphthoic Acid—identified as our Model: AN-62N—follows the same strict parameters, from melting point to moisture content. Typical batches show a bright, solid pale color with minimal traces of tars that would spell trouble in advanced syntheses. Chromatographic purity comes in above 99%, with fewer than 0.2% impurities, and moisture falls well below 0.5%. Those numbers don’t tell the whole story but reflect years spent improving filtration, solvent recovery, and drying to deliver what labs demand.

    Usage Rooted in Decades of Practice

    Almost every week, our technical team takes calls from research chemists and production managers. Sometimes they want better color stability in an azo dye; in other cases, a new antitumor drug candidate hinges on the quality of this intermediate. Our regulars in pigment manufacturing need batches to remain free of iron and copper ions, since even micrograms per kilo can shift tone or dull the final product’s brilliance. The pharmaceutical sector chases after even higher analytical standards; small molecules like this create the foundation for naphthyl-based APIs, and a single off-spec batch threatens not only yield but regulatory compliance.

    We also see demand from custom pesticide synthesis and performance material innovators. Each sector takes its own approach to using 6-Amino-2-Naphthoic Acid. In a pigment facility, staff dissolve the solid powder and carry out coupling reactions, blending with diazonium salts to form vivid, heat-stable red or orange shades. For drug precursors, careful handling inside a glove box becomes the norm, isolating the acid during amide bond formation without risk to sensitive functional groups. Technical researchers tell us that our product’s lack of residual solvent makes it a favorite for fine-tuned reactions—where even an extra half percent ethanol or water could quench yields or cause a product to crystallize out prematurely.

    Environmental specialists aren’t left out, either. Some have developed sensors or chromatographic methods where this compound anchors larger detection molecules. Students in academic settings regularly turn to our product—sometimes for simple undergraduate organic labs, sometimes for cutting-edge graduate projects seeking novel aromatic substitutions.

    The Differences Only a Direct Producer Really Sees

    Our team has seen and sampled 6-Amino-2-Naphthoic Acid from around the world, and the differences go beyond cost or shipping time. Some other sources deliver rougher, more orange-tinged crystals. The contamination levels from by-product sulfonates or residual chlorinated solvents show up quickly in quality control, affecting end-use performance. Customers often guess that particle size would matter most, but real-world feedback says it’s minor compared to color and solubility. Purity, on the other hand, moves to the center of every purchase decision.

    Many new customers discovered us after experiencing batch-to-batch inconsistency using imported intermediates. Some have stories about downstream troubleshooting—chromatography columns that clog from “invisible” insolubles, reaction profiles altered by low-level side products. Our control over upstream materials, reaction time, filtration, and solvent exchange means each production run matches the next. We chose not to outsource, not because it saves pennies on the kilo, but because our in-house approach allows us to test—using melting point and spectral identity—immediately after synthesis. That leaves no lag between making, testing, and packing.

    We support more than the bulk market. Small research packs in foil-lined bags and large-scale shipments arrive in drums lined with acid and amine compatible coatings. This level of handling reduces exposure to ambient moisture, avoiding hydrolysis or degradation in transit. Our cleanroom packaging adds another layer of insurance for sensitive applications.

    Access to Technical Support—Not Just a Brochure

    Our chemists spend as much time problem-solving as producing. A developer working up a new azo pigment once struggled with unexpected off-hues, only to find that an upstream solvent impurity in a competitor’s material had thrown off their whole batch. After reviewing their process, we suggested small process changes and shared our latest batch analysis, giving them the troubleshooting insight they needed. Another pharmaceutical partner requested a special analysis to guarantee the absence of specific photoreactive contaminants, which required tweaking our in-line UV detection to catch rare impurities.

    We believe real-world experience beats simple specification sheets. Each time a customer comes to us with an analytical challenge, we welcome it as part of our ongoing quality push. Sometimes, seeing recurring technical questions prompts us to run additional batch tests or modify our synthetic route, giving clients greater confidence when scaling up.

    Shipping isn’t just logistics to us. On humid summer days, we increase desiccant levels in every pack, especially for samples heading overseas or into areas with high seasonal swings. A minor investment, but our decades watching raw solids clump or cake during transit taught us that maintaining flow and purity requires vigilance right until the product arrives at the client site.

    Mistakes Teach Precision—The Evolution of Our Manufacturing

    Getting to our current product reliability took years of learning from mistakes, not just abstract principles from chemical engineering handbooks. In our earliest attempts, filtering out trace iron led to repeated filter clogs, which delayed production. We changed our pre-filtration gradings and added a chelation step, maintaining throughput and keeping metallic residues at bay. Paying attention to even the smallest variables—reaction temperature, agitation rate, particle collection timing—pays off in pure, easy-to-handle product.

    Some manufacturers stick with standard operating procedures even after repeated issues; our experience shows it pays to investigate and adapt. A surge in customer complaints about off-scale melting points during one hot summer prompted us to review every point of exposure—from raw drum unloading to final packaging. We adjusted our air circulation systems, and the number of off-spec incidents dropped. These small adaptations may not appear on data sheets, but they show in the daily reliability of what we deliver.

    Several years ago, a major user in the pigment industry shared feedback that competitor material led to pigment particles clumping during ball-milling. After testing both our product and theirs side-by-side, we pinpointed surface impurities as the culprit—our additional purification step left ours free-flowing, while others began separating in storage. The feedback loop from real user experience shapes the outcome more than any internal checklist.

    Why Purity Standards Mean More Than a Number

    It’s easy to make claims about analytical purity, especially to anyone scanning a table of numbers. Still, the practical experience tells us that “99% pure” from one source can behave quite differently from “99.5% pure” from another, depending on which contaminants linger. We perform batch-to-batch infrared and HPLC analysis, along with checks for heavy metals and chlorinated residuals. Our regular audits focus not only on the percentage of the main compound but on the particular impact of known possible contaminants.

    Pharmaceutical partners set the highest bar, pushing not only for high purity but also tightly defined impurity profiles. Regulations keep tightening, and so does our process—from updating our chromatography columns to sourcing only traceable reagents. Pigment makers rely on color consistency from one truckload to the next, since small impurity swings can shift hue by several CIE units. We’ve learned that transparency and full disclosure on product analysis brings trust and repeat business far more than marketing terms.

    Continual Improvement—and a Willingness to Collaborate

    We know product requirements keep shifting in different industries, and we keep pace by investing in analytical tools and improved benchtop synthesis models. Our pilot lab tests new filtration materials or alternative solvents to drive down contaminant levels. Technical cooperations with university groups continue to teach us about how 6-Amino-2-Naphthoic Acid performs in new coupling and cyclization reactions. We check reaction byproducts to avoid feeding unwanted species into end-user processes.

    A few years ago, research interest shifted toward greener synthesis, with several key dye manufacturers testing water-based coupling. They needed 6-Amino-2-Naphthoic Acid with a tighter water content and no residual ammonium salts. We switched certain steps to sealed processing, upgraded drying, and ran extra Karl Fischer analyses. The result—no measurable effect on color output even when changing solvents—delivered both environmental benefits and consistent product.

    Partners in advanced material development sometimes ask for custom modifications, such as finer particle grade or specific absence of rare metals that could catalyze unwanted reactions. Each request gives us a new chance to refine our process or develop a new analytical method.

    Looking Forward—Creating Value Beyond the Drum

    Supplying a chemical intermediate like 6-Amino-2-Naphthoic Acid means more than producing tonnage or ticking off big sales orders. Reliability matters most—any mismatch between delivered sample and large-scale batch creates costly delays, wasted materials, and headaches for all involved. Our commitment to regular process review, rapid response to customer technical requests, and continuous quality improvement sets us apart from simple commodity merchants.

    We view every feedback and every technical support request as an opportunity to get better. Problems with a particular pigment grade, odd results in crop science pilot plants, or a lab-scale pharmaceutical test that doesn’t match expectations—all these scenarios help sharpen both our operational vigilance and our product value. We pay attention to the critical process steps, from reaction to packing, rather than relying on generic outsourcing or hands-off logistics.

    Sourcing 6-Amino-2-Naphthoic Acid directly from a producer who understands its whole lifecycle reduces risk for customers, allowing them to focus on their innovations rather than troubleshooting raw materials. We bring personal experience, full analytical data, and the kind of manufacturing transparency that comes only from doing all the work on site—from starting raw materials to the final pack.

    In a marketplace where differences among sources and batches can translate to weeks of lost work or failed experiments, our role extends beyond just supply. We are partners in each application cycle—whether that’s coloring tomorrow’s plastics, supporting the next wave of active pharmaceutical ingredients, or enabling research projects. The decades of on-the-ground expertise, openness to technical partnership, and constant upgrading of standards and equipment combine to make our 6-Amino-2-Naphthoic Acid a smart choice for professionals who need certainty in their chemistry and their business.