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N-(4-Ethoxyphenyl)-3-Hydroxy-2-Naphthamide

    • Product Name N-(4-Ethoxyphenyl)-3-Hydroxy-2-Naphthamide
    • Alias ENPA
    • Einecs 629-622-9
    • 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
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    Specifications

    HS Code

    327497

    Productname N-(4-Ethoxyphenyl)-3-Hydroxy-2-Naphthamide
    Molecularformula C18H15NO3
    Molecularweight 293.32 g/mol
    Casnumber 63469-01-4
    Appearance Off-white to pale yellow solid
    Meltingpoint 218-221°C
    Solubility Slightly soluble in DMSO and ethanol
    Purity Typically ≥98%
    Storageconditions Store at 2-8°C, protected from light
    Smiles CCOC1=CC=C(C=C1)NC(=O)C2=CC(=CC3=CC=CC=C32)O
    Iupacname N-(4-ethoxyphenyl)-3-hydroxy-2-naphthamide

    As an accredited N-(4-Ethoxyphenyl)-3-Hydroxy-2-Naphthamide factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.

    Packing & Storage
    Packing 100g of N-(4-Ethoxyphenyl)-3-Hydroxy-2-Naphthamide, sealed in an amber glass bottle with tamper-evident cap, clearly labeled.
    Shipping **Shipping Description:** N-(4-Ethoxyphenyl)-3-Hydroxy-2-Naphthamide is shipped in tightly sealed, chemical-resistant containers to prevent contamination and degradation. It is transported as a solid under ambient conditions unless otherwise specified. Ensure compliance with local, national, and international transport regulations for laboratory chemicals. Handle with care, avoiding moisture and direct sunlight during shipping.
    Storage Store N-(4-Ethoxyphenyl)-3-Hydroxy-2-Naphthamide in a tightly sealed container, away from moisture, light, and incompatible substances. Keep it in a cool, dry, and well-ventilated area, ideally at room temperature (20–25°C). Ensure proper chemical labeling and restrict access to authorized personnel. Avoid exposure to heat, flames, and strong acids or bases to maintain stability and safety.
    Application of N-(4-Ethoxyphenyl)-3-Hydroxy-2-Naphthamide

    Applications of N-(4-Ethoxyphenyl)-3-Hydroxy-2-Naphthamide in Industrial Manufacturing

    N-(4-Ethoxyphenyl)-3-Hydroxy-2-Naphthamide serves as a specialized organic intermediate, supporting advanced synthesis in multiple industrial production streams. Our facility supplies this raw material to clients working in pharmaceuticals, high-performance pigments, specialty agrochemicals, electronic chemicals, and polymer additives, ensuring strict quality management from batch production to final shipment.

    1. Pharmaceutical Intermediate Synthesis

    Manufacturers select this intermediate for constructing complex molecular structures in API development, particularly naphthamide-based drug candidates. Its aromatic amide configuration provides stability and reactivity valued during multi-step synthesis, including amidation and coupling reactions under controlled conditions. Downstream, chemists employ this compound in scheduled syntheses compliant with cGMP mandates, applying documented traceability and analytics from incoming goods through purification, crystallization, and isolation steps to achieve targeted pharmaceutical purity profiles.

    Industry compliance standards

    • ICH Q7 Good Manufacturing Practice
    • US FDA 21 CFR 210/211 (as relevant for intermediates)
    • EU EudraLex GMP Volume 4
    • Relevant pharmacopoeia reference (USP, EP) for intermediate traceability

    Typical usage ratio

    • Ranges from 0.2 molar equivalents (custom syntheses) to 1.5 equivalents for key step intermediates, adjusted based on reaction route and process yield requirements. Exact ratio specified in each master batch record.

    Downstream process integration

    • Directly introduced post-initial core structure formation; undergoes coupling or amidation with activation reagents.
    • Purification steps typically include solvent-based crystallization or chromatography, monitored by HPLC or LC-MS.
    • Used in dedicated reactors under inert atmosphere and temperature control measures for product uniformity.

    Final product types

    • Active pharmaceutical ingredients (target molecules containing naphthamide motifs)
    • Advanced pharmaceutical intermediates for antihistamine synthesis
    • Research oncology and CNS candidate drugs under IND/clinical phases

    2. High-Performance Pigment Synthesis

    Colorant and pigment manufacturers use this compound as a coupling component or intermediate in synthesizing azo and anthraquinone pigments. It participates in diazotization and coupling reactions, enabling specific hues with enhanced lightfastness, solvent resistance, and color stability for automotive, industrial coatings, and plastics. Its pure, consistent form achieves narrow color distribution, and its naphthalene core introduces unique chromophore functionalities favored in high-durability pigment grades.

    Industry compliance standards

    • ISO 9001:2015 Quality Management for pigments
    • EN 71-3 (Safety of Toys – migration of certain elements)
    • REACH Registration (for use and handling of aromatic amides)
    • ASTM D476 (Classification for Dry Pigment)

    Typical usage ratio

    • Employed at 0.3 to 0.9 molar equivalents relative to coupling partners, tuned for chroma and yield in pigment batch processes; amount optimized during pre-production scale up.

    Downstream process integration

    • Combined during diazotization stage, followed by controlled pH coupling in aqueous or solvent media.
    • Downstream operations include filtration, grinding, and post-treatment for dispersion properties.
    • Quality control at each stage using spectrophotometry and particle size analysis.

    Final product types

    • Automotive and industrial coatings pigments (organic naphthamide pigments)
    • Masterbatch colorants for plastics and fibers
    • High-performance printing inks, especially for specialty packaging

    3. Agrochemical Synthesis: Specialty Herbicide Precursors

    Producers in the crop protection sector source this compound for synthesis of innovative herbicide molecules featuring naphthamide groups. Recent process chemistry trends utilize its reactivity for constructing stable active ingredients, where the ethoxy and hydroxy substituents impact herbicidal selectivity and activity spectrum. Downstream, this raw material integrates into multi-step synthetic routes, followed by robust purification and conversion steps, all documented under agrochemical quality assurance frameworks.

    Industry compliance standards

    • ISO 9001:2015 for process and risk management
    • FAO/WHO Specifications on pesticides formulation
    • OECD Guidelines for the Testing of Chemicals (relevant for intermediates)
    • GLP (Good Laboratory Practice) if used in regulated development-stage products

    Typical usage ratio

    • Generally 1.0 to 1.2 molar equivalents per targeted active ingredient structural core, calculated by stoichiometry; ratio verified in scale-up validation and pilot runs.

    Downstream process integration

    • Fed into core ring-closure or functionalization step of herbicide synthesis route, either as a key node intermediate or as a blocking group precursor.
    • Isolated and purified in multi-stage solvent extraction and crystallization processes.
    • Monitored for residual impurity threshold compliance according to agrochemical QC SOPs.

    Final product types

    • Naphthamide-derived herbicide technical concentrates
    • Active ingredient formulations for broadleaf weed control
    • Chemistry reference substances for regulatory CRO studies

    4. Electronic Chemicals: Organic Semiconductor Materials

    Manufacturers of organic semiconductor and LCD panel materials use this amide as a tailored building block, particularly where electron donor-acceptor characteristics boost charge transport properties. The aromatic naphthamide core imparts stability and processability required in thin film deposition and printed electronics. Quality inspection throughout production ensures material purity aligns with device performance expectations, and manufacturing runs under controlled environmental conditions to prevent trace contamination affecting final optical or electrical parameters.

    Industry compliance standards

    • ISO 14644 Cleanroom Classification (for semiconductor material processing)
    • Customer internal QC protocols for organic optoelectronics
    • RoHS (Restriction of Hazardous Substances) for electronic chemicals
    • REACH Regulation (Annex XVII, if applicable to aromatic amide class)

    Typical usage ratio

    • From 1% to 40% by weight in charge transport layers or emissive layer blends; adjustment based on film thickness and device architecture requirements developed in pre-production qualification.

    Downstream process integration

    • Dissolved with compatible solvents for spin coating or inkjet printing of functional layers in OLEDs or LCDs.
    • Subjected to high-purity filtration before thin film deposition.
    • Processed in inert gas conditions to minimize oxidative degradation in fabrication cells.

    Final product types

    • Organic thin-film transistors (OTFTs)
    • OLED emissive and charge transport layers
    • Semiconductor-grade display coatings for advanced displays

    5. Polymer Additive Manufacture: Advanced UV Absorber Precursors

    Compounders and additive formulators employ this chemical entity as a precursor in synthesis of naphthamide-based UV stabilizers. The molecular integrity of its naphthalene system supports high-energy UV absorption, often tailored for engineering resins and outdoor polymers. Manufacturers develop additive masterbatches by melt blending or solution mixing, tracking intermediate stability and integrating quality assurance checkpoints to deliver consistently performing finished additives for high-end thermoplastics or coatings.

    Industry compliance standards

    • ISO 9001:2015 for additive process management
    • FDA 21 CFR 177 (Substances for use in polymers, limited to plastics for indirect food contact)
    • EU Directive 2002/72/EC relating to plastic materials and articles
    • REACH dossier submission for polymer additives

    Typical usage ratio

    • Typically 0.5% to 2.5% by weight as an active component in UV absorber additive; optimized by compounder based on resin compatibility and weathering test results.

    Downstream process integration

    • Conversion into final UV absorber through chemical derivatization (e.g., alkylation, acylation) before blending into polyolefin, PET, or polycarbonate matrices.
    • Integrated during compounding as a solid, liquid, or concentrate additive, post-polymerization.
    • Evaluated for extraction resistance and color stability in accelerated aging chambers.

    Final product types

    • UV stabilizer masterbatches for outdoor plastics
    • Weather-resistant polymer blends for automotive and packaging
    • Clear coatings with enhanced UV resistance
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    Certification & Compliance
    More Introduction

    N-(4-Ethoxyphenyl)-3-Hydroxy-2-Naphthamide: A Reliable Choice from an Experienced Manufacturer

    Direct From the Maker: Why Our Process Matters

    Every kilogram of N-(4-Ethoxyphenyl)-3-Hydroxy-2-Naphthamide you receive from our facility represents the know-how built from years in chemical production. Our hands-on approach, developed over decades, eliminated missteps early and led to a process designed for purity, consistency, and batch-to-batch reliability. We monitor each reaction in real-time, not just by remote logbooks but by technicians with practical expertise, who scrutinize every step with an experienced eye.

    Facilities that run continuous process improvements and analyze deviations as they occur, not after the fact, develop an instinct for controlling product quality. For this compound, we moved from bench trials to scale-up with a focus on controlling moisture and oxidation at each intermediate stage. That direct oversight ensures our product always meets the purity specifications demanded by researchers and formulators.

    Compound Profile: Practical Use and Manufacturing Insight

    N-(4-Ethoxyphenyl)-3-Hydroxy-2-Naphthamide shows up on workbenches and in process lines for a few specialized reasons. Research teams reach for it when developing new pigment classes or screening for pharmaceutical actives because its naphthamide core and substituted phenyl ring offer structural versatility. The hydroxyl group at position 3 creates multiple hydrogen bond options, which enhances molecular interactions in synthetic biology and material science.

    Customers have remarked that the physical stability of our batches makes weighing and dosing straightforward. We keep residual solvents below the detectable threshold, and our powder’s particle size remains within a narrow distribution because we avoid cutting corners during milling and drying. Some competitors push out product with higher moisture content to save time, but that can affect downstream synthetic reliability, leading to clumping or degraded performance. Our moisture analysis always sits below 0.1%, confirmed by daily Karl Fischer titrations, so clients get powder that flows and blends without headaches.

    Why Sourcing Direct From Manufacturer Makes a Difference

    Third-party traders often ask about our lead times, but production schedules in a real plant don’t work on arbitrary deadlines. Equipment downtime, raw material batch variability, and scaling challenges create obstacles unless manufacturing teams respond immediately. We have implemented redundant filtration and drying systems, so an unexpected equipment issue never delays deliveries. Customer expectations sometimes rise when they hear about academic-scale syntheses, but translating milligram recipes to multi-kilogram production exposes practical issues only producers can resolve. For this naphthamide, we tracked every variable and standardized everything from raw material sourcing (high-purity 4-ethoxyaniline and 2-hydroxy-3-naphthoic acid), to reaction pH, to kill-point temperature.

    Procurement professionals look for documentation, but documentation developed by those who never touched the process loses value. Our certificates bear the signature of the chemist who supervised the batch, not just a back-office administrator, and they reflect the actual process conditions. Many clients mistakenly assume purity always correlates with yield, but firsthand experience shows that adjusting reaction time for higher purity sometimes lowers yield, and vice versa. We set our specs based on technical reality, not marketing brochures.

    Specification Values That Matter

    Product literature often reads as an endless list of numbers, but very few affect real-world outcomes. For N-(4-Ethoxyphenyl)-3-Hydroxy-2-Naphthamide, assay (HPLC, >99%) and identified impurity profiles shape performance more than minor variations in melting point. We profile impurity patterns batch-wise and hold back lots until the sub-component content sits well below international standards. Trace metals get special attention because their presence interferes with downstream catalysis. Our labs run ICP-MS checks, not once, but before and after large-scale purification. For clients with special requirements—formulators for high-purity pharmaceuticals or those in electronic materials—these steps make a difference.

    Physical form consistently arrives as a fine, almost chalk-like powder, with color staying off-white to pale yellow. That color tells a story: it reflects the reaction environment’s cleanliness and the absence of over-oxidation or tarring, which shows up in brown or grey hues. We learned to maintain that pale color by precisely controlling the oxygen purge and solvent exchange steps. There’s no substitute for hands-on attention at these stages—automation alone misses subtle clues, like a faint odor or sheen change, which our shift team learns to spot over years at the bench.

    Comparing to Similar Naphthamide Derivatives

    Our clients often ask how this compound measures against similar structures like N-phenyl-3-hydroxy-2-naphthamide or N-(4-methoxyphenyl)-3-hydroxy-2-naphthamide. Structurally, the ethoxy group brings an added element of polarity and bulk that can alter both solubility and reactivity in target synthesis. From our processing vantage, the ethoxy derivative purifies more cleanly, since its crystallization step avoids the resinous byproducts common with more hydrophobic analogs.

    While some users value methoxy or unsubstituted phenyl variants for certain reactivity profiles, they find downstream processing less predictable. We noticed more in-process filters needed to be replaced, and slightly higher solvent consumption during recrystallization. The ethoxy modification reduces tarring and waste, offering cleaner mother liquors and significantly less environmental burden during waste treatment.

    Downstream chemists often report higher yields or cleaner product in pigment intermediate and pharmaceutical exploratory syntheses. Our in-house applications team ran parallel reactions with both the ethoxy and methoxy derivatives, and we documented filtration times—ethoxy variant filtered three times faster, while final purity requirements were met without additional rework. Years of producing these compounds taught us that sometimes a small structural change leads to major process benefits, both for the producer and the end user.

    Usage Scenarios: Not Just for the Lab

    Many products on the market get pigeonholed as “research chemicals,” but our customer base demonstrates a more practical spread. Large volumes supply research groups in pigment and dye development, where subtle differences in structure impact lightfastness and color stability. Electronic materials firms rely on our naphthamide for functional surface coatings on device substrates, stemming from strong hydrogen bonding and aromatic stacking, which enhance adhesion and surface durability.

    Pharmaceutical R&D teams ask about our impurity control because they use this compound either as a scaffold for SAR studies or as a step in higher-value target synthesis. Some bioassay groups build libraries of naphthamide derivatives to screen for anti-inflammatory or anticancer activity. The reliability of our batches supports reproducible results in these screens, reducing repeat experiments due to unknown variables.

    Even outside core industry segments, polymer research teams test the unique ring structure and functional groups for modifying resin properties, aiming for improved mechanical strength or new crosslinking strategies. Students working on FYP or thesis projects, teachers ordering for demonstration labs, and commercial scale developers all benefit from a product that simply does what it’s supposed to do, every time.

    What Sets Us Apart: Full-Scale, Ground-Level Manufacturing

    Scaling complex aromatic amide synthesis isn’t a textbook exercise. It’s about finding the right team, keeping training constant, and adapting to changing regulatory and environmental requirements. Our operators know every valve and pump by heart, and our QC staff inspect product by both instrumentation and close examination. Small process deviations never go unchecked; years of troubleshooting under real deadlines taught us that guessing or deferring always costs time and product.

    Inspection goes beyond instrument readout. If the product’s hue hints at over-oxidation, or flow properties feel off by hand, we pull aside the batch for full analysis. Even seasoned research chemists appreciate receiving material that never gives surprises mid-synthesis.

    Trace contaminants, often invisible by casual HPLC or NMR analysis, can cause failures in downstream pharmaceutical and electronics manufacturing. We test every significant incoming lot of raw materials before charging reactors, and we keep detailed production records stretching back a decade. Customers have asked for this history time and again, and it’s always on hand. Our openness and willingness to adapt batches for clients drives loyalty that outlasts price changes in the spot market.

    Supporting Evolving Needs Through Real-Time Feedback

    Customers have direct lines to our technical support, staffed by engineers and chemists who spent their own time in plant operations. We take feedback seriously. Long-term industrial partners sometimes share application insights, pointing out subtle solubility or stability issues in their proprietary blends. Our team responds by adjusting process variables on future batches—whether it’s slowing down reflux or shifting pH to suppress a minor impurity.

    Small-run orders for academic or formulation trial use benefit just as much as industrial orders. Users frequently come back for consistent results because development work cannot tolerate unexplained variability. It’s common for us to validate new analytical methods or adapt drying cycles to meet custom specs, ensuring each client gets exactly what was promised.

    Environmental Responsibility Grows with Each Batch

    Over the years, we recognized environmental compliance not as a checkbox but as a continuous responsibility. As manufacturers, we control not only product quality but also the footprint left behind. Our process reclaims solvents through multi-stage recovery, with distillation yields tracked for every campaign. Recovered solvents are tested and returned to the line to minimize waste and emissions.

    Wastewater is treated on-site, with full chemical oxygen demand (COD) removal targets, and all spent catalyst or filter cake undergoes third-party hazardous waste processing. Clients in the electronics, pigment, and pharmaceutical sectors depend more on certified sustainable sourcing. Our experience with regulatory audits, ISO certifications, and routine site inspections keeps us in line with evolving environmental standards. From switch to low-emission boilers to investing in on-site renewable energy, we put these steps in place long before they became industry buzzwords.

    Supply Chain Strength Through Direct Engagement

    Reliability in the supply of specialty chemicals is less about sourcing and more about control. Keeping raw materials, intermediates, and finished goods production under one roof eliminates the guesswork of third-party errors or last-minute shortages. Supply teams in need of “just-in-time” deliveries appreciate our buffer stocks and proactive forecasting, which does not rely on hope or luck. We have lived through market disruptions, and experience has taught us to diversify suppliers and invest in local logistics, so product never sits stuck on a dock.

    Since changes to batch sizes, new regulatory requirements, or customer-driven specs come up on short notice, it’s essential for a manufacturer to adapt. Our production management meets every week with technical and QC teams to review upcoming orders, equipment needs, and customer feedback. This dialogue guarantees that the finished product matches every customer’s purpose, whether it’s for multi-tonne industrial formulation or kilogram-level academic research.

    Practical Differences From Repacked and Trader-Offered Batches

    Product direct from our plant arrives with known lineage, monitored storage, and current COA matching the supplied batch, not an outdated reference sample. Those purchasing through resellers often encounter mixed lots or mismatched paperwork, leading to batch variability and uncertainty during analytical confirmation. Years spent fielding complaints about “matching to reference spectrum” or “batch-to-batch inconsistency” from traded product convinced us to ship only factory-direct.

    Customers bypass unnecessary delays and markups common to repacked material. Factory-sealed drums leave our dock with evidence seals and shipment logs, giving full assurance that no tampering or improper rehandling occurred. We trace each unit from original synthesis to your loading dock, keeping integrity across the entire supply chain. Clients who shifted from dealers to direct purchase report fewer quality investigations, less rejected material, and faster project timelines.

    Staying Ahead With In-House Innovation

    Over time, we learned it’s not enough to match a standard—anticipating customer and industry changes keeps us ahead. Our technical team maintains a standing project list for compound innovations, from process intensification to catalyst recycling. At key customer sites, we’ve installed pilot reactors for collaborative scale-up work, so site-specific feedback translates into factory practice.

    Every year, we run training sessions for our team, introducing new quality control standards, analytical instrument upgrades, and process safety enhancements. Audits, both internal and from third-party experts, expose blind spots, which our teams address proactively. Clients see the result: consistent, problem-free material that cuts down long troubleshooting cycles during new project launches.

    Trust Built on Real-World Experience

    Our facility’s long production track gives us perspective on what customers require and what rarely gets mentioned in glossy catalogues. We focus on creating a product that removes risk from your operations. Large-scale volume users value our shipment flexibility and technical openness. Lab-scale innovators find answers quickly, from formulation tweak consultations to custom batch production.

    N-(4-Ethoxyphenyl)-3-Hydroxy-2-Naphthamide may look like a routine catalogue item. But for our team, each batch reflects effort, expertise, and commitment to a craft honed under real-world pressures. Years spent troubleshooting, refining, and listening to scientific partners changed the product for the better. When project timelines, quality targets, and technical headaches pile up, customers benefit from the difference that only direct manufacturing experience can provide.