4-Fluoroaniline

    • Product Name: 4-Fluoroaniline
    • Alias: p-Fluoroaniline
    • Einecs: 202-835-4
    • Mininmum Order: 1 g
    • Factroy Site: Yudu County, Ganzhou, Jiangxi, China
    • Price Inquiry: admin@ascent-chem.com
    • Manufacturer: Ascent Petrochem Holdings Co., Limited
    • CONTACT NOW
    Specifications

    HS Code

    822012

    Chemical Name 4-Fluoroaniline
    Cas Number 371-40-4
    Molecular Formula C6H6FN
    Molecular Weight 111.12 g/mol
    Appearance Colorless to pale yellow liquid or solid
    Boiling Point 182-183 °C
    Melting Point 16-18 °C
    Density 1.186 g/cm³
    Solubility In Water Moderate
    Flash Point 75 °C
    Refractive Index 1.567
    Smiles C1=CC(=CC=C1N)F
    Iupac Name 4-fluoroaniline
    Pubchem Cid 10626
    Synonyms p-Fluoroaniline, para-Fluoroaniline

    As an accredited 4-Fluoroaniline factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.

    Packing & Storage
    Packing 4-Fluoroaniline, 100g: Supplied in a sealed amber glass bottle with tamper-evident cap and hazard labels, inside protective cushioning.
    Shipping 4-Fluoroaniline should be shipped in tightly sealed containers under cool, dry, and well-ventilated conditions. It is classified as a hazardous material (UN 2946), requiring appropriate labeling and documentation. Transport must comply with local, national, and international regulations to ensure safe handling and prevent exposure, leaks, or environmental contamination.
    Storage 4-Fluoroaniline should be stored in a tightly closed container in a cool, dry, well-ventilated area away from incompatible substances such as oxidizers and acids. Keep it away from heat, sparks, and open flames. Protect it from light and moisture. Use secondary containment and clearly label the storage area, ensuring only trained personnel have access.
    Application of 4-Fluoroaniline

    Applications of 4-Fluoroaniline in Industrial Manufacturing

    As a committed manufacturer of 4-Fluoroaniline, we supply this specialized aniline derivative to multiple sectors where its unique fluorinated structure enables distinct chemical reactivity and performance. The applications highlighted below represent established, high-value uses in the chemical industry, each differentiated by strict compliance governance, precise dosing, controlled process integration, and defined end-use product classes.

    1. Synthesis of Agrochemical Active Ingredients

    Agricultural chemical manufacturers use 4-Fluoroaniline as a building block in the synthesis of selective herbicides, insecticides, and fungicides, particularly those relying on fluorinated aniline derivatives for targeted biological activity. It is introduced predominantly at the initial amide coupling or urea formation stage, where the aniline moiety provides a reactive handle for downstream diversification. Accurate control over the fluorine position during production directly influences crop protection chemical performance and environmental persistence.

    Industry compliance standards

    • REACH Regulation (EC) No 1907/2006
    • ISO 9001:2015 quality management for chemical processing
    • FAO/WHO guidelines for pesticide manufacturing
    • OHSAS 18001 occupational health and safety in synthesis plants

    Typical usage ratio

    • Ranges from 8–15% of total precursor mass; optimized according to targeted fluorine incorporation and product yield. Higher ratios apply for multi-step syntheses requiring direct coupling of the aniline core.

    Downstream process integration

    • Added to reaction vessels during initial condensation steps or amidation. The material reacts under controlled pH and temperature, followed by intermediate isolation and multi-stage purification for agrochemical actives.

    Final product types

    • Herbicide intermediates (e.g., fluorinated phenylureas)
    • Insecticide intermediates (aromatic heterocycle-based compounds)
    • Fungicide active ingredient precursors
    • Finished crop protection agents requiring site-specific fluorine placement

    2. Pharmaceutical Intermediate Manufacturing

    The pharmaceutical industry utilizes 4-Fluoroaniline in the preparation of fluorinated intermediates that serve as precursors for selective kinase inhibitors, antidepressants, and anti-inflammatory drugs. It enters high-purity synthesis routes where its ortho-fluoro group improves metabolic stability and modulates pharmacokinetics of finished molecules. Strict segregation and validation accompany its handling in regulated facilities to meet stringent medicinal compound requirements.

    Industry compliance standards

    • cGMP (ICH Q7) for APIs and intermediates
    • USP-NF and European Pharmacopoeia monograph references for reaction precursors
    • FDA QSR 21 CFR Part 210–211 for production facilities
    • ISO 14001:2015 for environmental management in pharmaceutical synthesis

    Typical usage ratio

    • 3–7 mol% relative to the primary pharmaceutical scaffold, adjusted to route efficiency, impurity control strategy, and regulatory impurity thresholds.

    Downstream process integration

    • Charged to hydrogenation reactors or C–N coupling stages in multi-step batch processes. Reactant purity, batch records, and reaction monitoring ensure compliance with medicinal chemistry purity demands.

    Final product types

    • Intermediate aryl amines for kinase inhibitor APIs
    • Precursor blocks for SSRIs and CNS drug molecules
    • Anti-inflammatory intermediate compounds
    • Fluorinated building blocks for patented oncology drugs

    3. Production of Specialty Dyes and Pigments

    Dye and pigment manufacturers rely on 4-Fluoroaniline for custom azo or anthraquinone derivatives, where its fluorinated ring structure introduces enhanced color fastness and solvent resistance to textiles, inks, and plastics. Material enters the diazotization sequence, controlling dye bath reactivity and the final chromophore outline. Industrial batch processes require precise feed and exhaustive quality testing to meet product consistency and regulatory standards globally.

    Industry compliance standards

    • OEKO-TEX® Standard 100 for restricted substances
    • EN 71-3 for toy and pigment safety (Europe)
    • ZDHC Manufacturing Restricted Substances List (MRSL)
    • GOTS for approved colorant processing in textiles

    Typical usage ratio

    • 2–6% by total monomer or co-reactant weight; final ratio set by target chromatic properties and desired fastness ratings per application segment.

    Downstream process integration

    • Introduced to the reaction flask during the preparation of diazonium salts or as a direct coupling partner, influencing dye molecular architecture and subsequent milling, filtration, and dispersion steps.

    Final product types

    • Synthetic textile disperse and acid dyes
    • Solvent-stable pigments for inks
    • Plastic and fiber masterbatches
    • Color-fast additives in specialty coatings

    4. Advanced Polymer Modifier Synthesis

    Polymer industry formulators introduce 4-Fluoroaniline into specialty polyamides, aramids, and fluoro-containing engineering plastics. Its inclusion modifies thermal properties, chemical resistance, and mechanical behavior of polymer chains. It is used in well-defined stoichiometric ratios during polycondensation, significantly impacting the functional integrity of high-performance resins for complex end-market use.

    Industry compliance standards

    • ISO 9001:2015 for polymer compounding
    • RoHS (Directive 2011/65/EU) for electronic and electrical applications
    • UL 94 (flammability classification of plastics)
    • IEC 61249-2-21 for halogen content in PCB materials

    Typical usage ratio

    • Typically 0.5–3% molar fraction versus the total monomer input. Proportion optimized by resin property requirements—higher levels for maximum thermal and flame resistance, lower for flexibility or processability goals.

    Downstream process integration

    • Precisely metered into melt polycondensation reactors or solution polymerization systems to ensure uniform incorporation into the polymer backbone and minimal residual monomer in the finished resin.

    Final product types

    • High-performance polyaramid fibers
    • Thermoplastic specialty films
    • Fluorinated engineering resins for automotive electronics
    • FPCB (Flexible Printed Circuit Board) base materials

    5. Synthesis of Chemical Process Catalysts

    Catalyst producers utilize 4-Fluoroaniline in ligand or complex synthesis for homogeneous transition metal catalyst systems, especially where electron-deficient substituents improve catalyst selectivity and stability. The compound acts as a ligand precursor or as part of immobilization matrices for fine chemical and hydrocarbon processing reactions. Integration focuses on high-purity input and precise dosing to guarantee catalyst reproducibility and compliance for regulated processes.

    Industry compliance standards

    • ISO 17034 for reference material production
    • API RP 751 for catalyst handling in petroleum processing
    • GMP for chemical process additives (as required by downstream segment)
    • Responsible Care® Management System for chemical manufacturing

    Typical usage ratio

    • Between 0.3–1.2 mol equivalent relative to the core transition metal, with adjustment based on desired ligand field strength, catalyst loading, and end-use specificity.

    Downstream process integration

    • Reacted with metal salts or pre-catalyst frameworks during initial catalyst complexation, followed by ligand exchange/purification and incorporation into supported or homogeneous catalyst systems.

    Final product types

    • Transition metal catalyst complexes for asymmetric synthesis
    • Fine chemical hydrogenation or coupling catalysts
    • Immobilized ligand systems in bulk monomer manufacturing
    • Custom process catalysts for hydrocarbon refineries
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    Certification & Compliance
    More Introduction

    4-Fluoroaniline: Manufacturer’s Perspective on Performance and Value

    What Matters in Producing True 4-Fluoroaniline

    Making 4-Fluoroaniline isn’t just a matter of following a recipe. From the choice of fluorinating agents to batch consistency, each variable shapes reliability for our downstream partners. We work with 4-Fluoroaniline every day. Its chemical formula, C6H6FN, represents more than a string of numbers and letters. This is a crucial aromatic amine, widely used for pharmaceuticals, agrochemicals, pigments, and special polymers. The presence of a fluorine atom on the aniline ring sets it apart, directly affecting both reactive behavior and safety requirements in synthesis. For us, the story isn’t just about manufacturing a raw material; it’s about ensuring every kg performs at the level intended in a cost-pressured, ever-evolving market.

    How 4-Fluoroaniline Works in Industry Applications

    In our facility, we synthesize 4-Fluoroaniline under tightly-controlled conditions. This helps us achieve high purity, typically above 99%, which gives our customers confidence—especially those in the pharmaceutical segment. Our clients use this intermediate in the development of antihistamines, antitumor compounds, and other complex molecules where a single impurity can derail an entire R&D project. In agrochemicals, 4-Fluoroaniline leads to herbicidal and insecticidal agents that make modern farming more productive. We test every batch to confirm that water content, residual solvent levels, and isomeric purity meet strict specifications. Laboratories and production lines depend on this certainty.

    Key Physical and Chemical Features You Can Depend On

    You can recognize 4-Fluoroaniline by its pale yellow appearance and a melting point around 13°C, with a boiling point near 183°C. As a liquid at room temperature, it’s manageable for most chemical handlers. The amine group is active, enabling straightforward substitution reactions in synthetic pathways, while the attached fluorine enhances electron-withdrawing properties, making it a preferred building block in medicinal chemistry. Our team has found that fluorine’s small size, coupled with its high electronegativity, brings unique thermal and metabolic stability to derived compounds. This means compounds derived from our 4-Fluoroaniline often resist breakdown in the human body, which carries practical benefits for drug developers.

    Distinctions Between Our 4-Fluoroaniline and Other Aromatic Amines

    Many new buyers ask how 4-Fluoroaniline compares with standard aniline or other fluoroanilines, such as 2- or 3-fluoroaniline. The answer lies not only in fluorine’s position on the ring, but in purity, trace metal content, and consistent packaging, all shaped by our process controls. Compared to plain aniline, the fluorine substitution at the 4-position imparts greater chemical stability and influences reactivity in N-arylation and alkylation steps. Our chemists frequently note sharper reaction profiles when working with our product, making downstream synthesis more predictable. For manufacturers producing target molecules—say, in drug design or crop protection—these differences translate to both higher yield and fewer purification headaches.

    The 4-position fluorine also alters toxicity and permeability in the final molecules, especially for compounds meant to interact with biological targets. That subtle modification opens doors that unsubstituted aniline cannot provide. We have seen customers in pigment manufacturing report increased color fastness in dyes derived from 4-Fluoroaniline, due to the altered molecular resonance structure. To us, this is proof that producing true 4-Fluoroaniline at consistent specification gives partners real, trackable advantages over alternatives.

    Specifications We Stand By

    Quality standards for our 4-Fluoroaniline hinge on three critical values: purity, moisture, and isomeric integrity. Every lot undergoes gas chromatography to confirm absence of 2-fluoro and 3-fluoro isomers, which alter end product properties. Our experience has shown that even trace impurities can show up in GC-MS screens, jeopardizing regulatory filings or causing downstream side reactions. We routinely supply product in steel drums or fluorinated HDPE, which holds up well against chemical migration and respects our customers’ shelf-life needs. For projects requiring ultra-high purity, we’ve tailored post-synthetic purification steps—distillation under reduced pressure, silica column pass-throughs, and precise temperature monitoring—to keep contamination below detection thresholds commonly set by multinational pharma or electronics clients.

    Insights on Safety, Handling, and Transport

    We pay close attention to safe manufacturing and shipping because 4-Fluoroaniline comes with its own occupational hazards. Liquid and vapors can irritate the skin, eyes, and respiratory tract. Our staff wear gloves and respiratory protection at all times throughout production and packaging. We train on the importance of proper ventilation and spill response. Correct labeling and documentation are essential for compliance during road or sea transport, and each shipment leaves our gates with a full audit trail, including certificates of analysis. Past incidents with other suppliers’ sub-standard packaging have taught us to run extensive leak tests, especially for export orders that face varied temperatures and handling.

    Lessons from Custom Synthesis and Process Development

    Some clients approach us requiring specialized grades of 4-Fluoroaniline, either at micro scale for pilot studies or at bulk scale for commercial production. Our in-house R&D team draws on decades of hands-on problem-solving. Sometimes a customer requests material free from even trace solvents, hoping to meet a new synthetic constraint introduced by regulatory changes. In those cases, we adjust our solvent selection at the earliest stages. Other times, a partner’s new reaction sequence calls for a unique impurity profile or a specific pH window during packaging. We never hesitate to invest the time needed for detailed batch documentation, because a misstep anywhere along the route means lost money and wasted weeks for everyone.

    Market conditions affect us directly. Price spikes in fluorinating agents or energy costs force real-time process adjustments. We’ve adapted equipment to reclaim solvents and use energy more efficiently, which benefits margins but also supports sustainability expectations from major brand customers. It’s rare for a day to pass without a request for product lifecycle data or updated carbon emissions figures. These questions reflect growing pressure to deliver not just chemical intermediates, but also evidence of responsible manufacturing for global supply chains.

    Customer Expectations and Regulatory Realities

    Buyers in pharmaceutical and agrochemical sectors set out demanding supply chains built on predictability and transparency. The days of semi-documented, unknown-origin intermediates have passed. Now, every gram of 4-Fluoroaniline we sell faces scrutiny—tracking, auditing, impurity profiling, and documentation. In addition to internal controls, regulators expect detailed characterization and full disclosure of any contaminants. Cross-referencing international standards means our compliance teams stay agile, updating dossiers and safety data files every time a new regulation emerges from EU REACH or the US EPA.

    Working directly with downstream formulators shows us how product consistency can be a make or break factor. Maybe a batch passes all internal lab checks, but still leads to yield drops on the customer’s line due to tiny fluctuations in isomer ratio. Our technical support jumps in, troubleshooting, tweaking synthesis steps, and tracking down root causes with the customer’s chemists. Customers expect not just product but partnership—a willingness on our side to admit missteps or improvise solutions before problems snowball.

    How We Handle Waste and Environmental Impact

    Manufacturing 4-Fluoroaniline generates both organic and inorganic byproducts, and these need careful management. Water from washing steps, acidic washes, and spent catalysts don’t just disappear; we recover, neutralize, or safely incinerate every stream. Our operations teams keep a close watch on waste minimization, whether by solvent recycling or scrupulous separation of hazardous residues. The pressure to address “forever chemicals” grows, with fluorinated compounds often singled out in environmental debates. By investing early in closed-loop capture systems and collaborating with certified waste handlers, we meet evolving regulatory and customer expectations.

    Some years back, rising scrutiny over fluorine discharge prompted us to overhaul emission monitoring. The lessons were absolute: even low-level leaks can turn into supply disruptions or regulatory fines. We saw an uptick in customer questionnaires, requiring detailed life-cycle data and lab validation of effluent streams. There is no shortcut here. Granting buyers access to site visits and real production logs builds confidence, and keeps our largest partners onboard for long-term contracts.

    Supply Chain Resilience and Transparency

    Supplying specialty intermediates is unpredictable. Weather events, strikes at global ports, or sudden shifts in raw material costs challenge our plans. Some years back, a shortage of fluorinated feedstock created ripple effects on global availability of 4-Fluoroaniline. Our procurement team responded by qualifying backup suppliers, stockpiling feedstock, and partnering with logistics firms up the value chain. This kind of preparedness may go unseen by end users. Still, it shields our customers from emergency shortages, keeps their plants running smoothly, and lets us fulfill orders that distributors might be forced to delay or cancel.

    Transparency wins trust. Customers appreciate open discussion of batch status, quality deviations, or shipment delays. Some clients request photos of packaging and seal checks. Others demand real-time tracking or direct access to our QA reports. We accommodate these requests as routine, knowing they reflect a shared interest in uninterrupted supply lines. Our reputation in the market depends as much on openness as it does on chemical performance.

    Continuous Improvement and Future Challenges

    No production day goes by without new demands for process upgrades or cost containment. Automation, data logging, and upgraded controls have moved from wish list items to daily factory tools. Our technical team manages software systems that log every batch, analyze outputs in real time, and flag outliers before an issue makes it to the customer’s tank. This vigilance lets us respond quickly—sometimes stopping a shipment, sometimes rerunning a purification step.

    Technology alone solves little without skilled people. We hire chemists and operations managers with industry experience, but also invest in continual training. Safety standards rise, chemical handling guidance evolves, and buyers expect knowledgeable voices on every call. In our experience, only consistent technical upskilling, from warehouse staff to lab analysts, maintains both speed and flexibility in our response to customers.

    Producing high-quality 4-Fluoroaniline isn’t a static achievement. Each quarter, we revisit process maps, procurement routes, and new uses for our product. Demand signals from pharmaceuticals and crop science shift faster than ever. Chemists bring us new reaction pathways or product requirements, pushing us to stay curious, test new purification protocols, or source specialty packaging for new logistics channels. We listen closely to feedback—not just from the largest buyers, but from R&D scientists at smaller firms whose discovery work points us to the future.

    Making 4-Fluoroaniline a Reliable Resource

    For over a decade, our facility focused on more than just outputs and production targets. Each batch of 4-Fluoroaniline represents hundreds of hours in synthesis, evaluation, testing, and safe handling—the reality of chemical manufacturing over abstraction. Our approach rewards attention to detail, respect for regulatory and environmental changes, and a recognition that every kilogram supports a larger ecosystem of innovation.

    The chemical industry faces increasing complexity with each regulatory shift and market swing. As a manufacturer, we experience the fast pace of change on the shop floor, in the lab, and through each conversation with buyers and end-users. Supplying high-purity 4-Fluoroaniline—batch after batch—has taught us that transparency, technical rigor, and responsiveness win loyalty from the world’s most demanding innovators. That lasting partnership sustains growth and feeds the search for the next breakthrough in smarter molecules, safer drugs, and better designed materials.

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