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2,4-Difluorophenylhydrazine Hydrochloride

    • Product Name 2,4-Difluorophenylhydrazine Hydrochloride
    • Alias DFPH HCl
    • Einecs 697-380-8
    • 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

    558131

    Product Name 2,4-Difluorophenylhydrazine Hydrochloride
    Cas Number 635-85-4
    Molecular Formula C6H6F2N2·HCl
    Molecular Weight 180.59 g/mol
    Appearance White to off-white solid
    Melting Point 165-170°C (decomposes)
    Purity Typically ≥98%
    Solubility Soluble in water, ethanol, and DMSO
    Storage Conditions Store at room temperature, keep tightly sealed
    Synonyms 2,4-Difluorophenylhydrazine hydrochloride; 1-(2,4-difluorophenyl)hydrazine hydrochloride

    As an accredited 2,4-Difluorophenylhydrazine Hydrochloride factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.

    Packing & Storage
    Packing 100 grams of 2,4-Difluorophenylhydrazine Hydrochloride, sealed in an amber glass bottle with a tamper-evident screw cap, labeled with safety instructions.
    Shipping 2,4-Difluorophenylhydrazine Hydrochloride is typically shipped in tightly sealed containers, protected from moisture and light. It is classified as a hazardous chemical and must be transported following regulatory guidelines, including labeling and documentation. Shipping may require ground transportation or air freight with appropriate safety measures and packaging to prevent leaks or contamination.
    Storage 2,4-Difluorophenylhydrazine Hydrochloride should be stored in a cool, dry, well-ventilated area, away from heat, moisture, and direct sunlight. Keep the container tightly closed and protected from physical damage. Store separately from incompatible substances such as oxidizing agents. Ensure appropriate labeling and access is restricted to trained personnel. Use gloves and eye protection when handling the chemical.
    Application of 2,4-Difluorophenylhydrazine Hydrochloride

    Applications of 2,4-Difluorophenylhydrazine Hydrochloride in Industrial Manufacturing

    As a direct manufacturer of 2,4-Difluorophenylhydrazine Hydrochloride, we focus on supplying this specialty intermediate for advanced industrial and fine chemical value chains. Its primary end-uses concentrate in high-value, regulated sectors that demand precision in formulation, process integration, and compliance. Below, we present focused, downstream application scenarios supported by proven industry practice.

    1. Pharmaceutical Intermediates for Oncology Active Ingredients

    2,4-Difluorophenylhydrazine Hydrochloride serves as a key hydrazine-building block during the synthesis of several diaryl hydrazone and pyrazole motifs used in small-molecule oncology drugs. Contract research and manufacturing organizations (CRO/CDMO) introduce this material at the hydrazine derivatization and cyclization stage, affording fluorinated pharmacophores that enhance metabolism stability in kinase inhibitor pipelines. Usage levels depend on the stoichiometry required to deliver high assay conversion for each specific API project, and GMP controls govern every step from raw intake through purification.

    Industry compliance standards

    • ICH Q7 (Good Manufacturing Practice for Active Pharmaceutical Ingredients)
    • FDA 21 CFR Part 211 (US cGMP for finished pharmaceuticals)
    • EU GMP Annex 8 (Sampling of starting and packaging materials)
    • USP and EP monographs for related intermediates

    Typical usage ratio

    • Used at 1.05–1.20 molar equivalents relative to the carbonyl precursor, adjusted by target yield and process selectivity

    Downstream process integration

    • Hydrazine derivatization or condensation introduced after aromatic acylation/halogenation; quenched and carried through subsequent cyclization or coupling batch reactions, followed by post-reaction purification

    Final product types

    • Small-molecule oncological APIs (e.g., kinase/protein inhibitor drugs)
    • Preclinical drug substance libraries for medicinal chemistry
    • Pilot intermediates for CDMO client scale-up programs

    2. Agrochemical Intermediate for Selective Herbicide Synthesis

    Crop protection manufacturers utilize 2,4-Difluorophenylhydrazine Hydrochloride in the preparation of fluorinated hydrazone templates, which act as intermediates for selective post-emergent herbicides. Its role centers on nucleophilic substitution or ring-closure steps that create highly specific, functionalized aromatic scaffolds, facilitating structure-activity tuning during herbicide R&D and pilot plant campaigns. Compliance with chemical safety and purity specifications is required to meet downstream regulatory dossiers.

    Industry compliance standards

    • FAO/WHO specifications for pesticide intermediates
    • REACH Annex VII-X (registration and use in EU)
    • ISO 9001:2015 for production traceability
    • Company-specific SOPs for raw material QC and batch record retention

    Typical usage ratio

    • 0.85–1.10 molar equivalents per aryl or carbonyl reagent, depending on required purity and process conversion

    Downstream process integration

    • Introduced at the hydrazination or condensation stage prior to functional group elaboration; excess quenched and removed during aqueous workup before concentration and crystallization

    Final product types

    • Precursor intermediates for pyridazinone and pyrazole herbicides
    • Registered active ingredient compounds for broadleaf and grass weed control
    • Experimental materials for regulatory field trials

    3. Specialty Dye Manufacturing for Electronic Display Pigments

    Leading pigment and specialty dye producers employ 2,4-Difluorophenylhydrazine Hydrochloride in the synthesis of high-performance azo and diazo compounds for photosensitive pigments. The reagent is integrated at the azo-coupling phase, enabling precise fluorine substitution on the aromatic nucleus, which imparts superior thermal and photochemical stability vital for liquid crystal display (LCD) filter and OLED material suppliers. Stringent control of trace impurities or metal content is mandatory given the functional end-use in electronics.

    Industry compliance standards

    • IEC 62471 (Safety for photobiological exposure in electronic materials)
    • RoHS Directive 2011/65/EU (Restriction of Hazardous Substances)
    • Company-specific requirements for low-metal and organic purity (<50 ppm metals total)
    • ISO 14001 for waste minimization in pigment manufacturing

    Typical usage ratio

    • 1.0–1.2 equivalents to coupling agent, calibrated by process engineer according to batch size and target dye loading

    Downstream process integration

    • Dosed at the beginning of hydrazine-to-azo conversion, followed by controlled temperature coupling; excess removed in multi-stage filtration and recrystallization for dye isolation

    Final product types

    • High purity display-grade azo/diazo pigments for TFT-LCD and OLED panels
    • Photoresist dyes for imaging applications
    • Stain reagents for analytical instrument calibration

    4. Advanced Organic Synthesis for Fluorinated Analytical Standards

    High-purity chemical suppliers utilize 2,4-Difluorophenylhydrazine Hydrochloride as a derivatization reagent for the development of reference standards and impurity markers used in QA/QC laboratories and environmental monitoring programs. By introducing characteristic fluorine signatures via hydrazone formation, this compound helps laboratories trace and quantify trace-level analytes using GC, LC, and MS techniques. Selection of this reagent enables laboratories building bespoke custom reference libraries to maintain analytical method validity under ISO/IEC 17025.

    Industry compliance standards

    • ISO/IEC 17025 (General requirements for laboratory competence)
    • USP & Pharmacopeia reference standard requirements
    • Analytical instrument SOPs regarding derivatization protocol
    • Regional environmental agency criteria (e.g., US EPA Method 525.2 derivative prep)

    Typical usage ratio

    • Reagent added at 1.0 equivalent to analyte, scaled logarithmically for micro-preparative syntheses (0.1–10 mmol scale)

    Downstream process integration

    • Hydrazone formation occurs as the initial derivatization step; excess reagent or by-products later removed by HPLC or preparative silica column purification, qualifying for analytical standard use

    Final product types

    • Certified reference standards with fluorine traceability
    • Derivative markers for environmental and pharmaceutical analysis
    • Specialty impurity markers for LC-MS, GC-MS calibration
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    Certification & Compliance
    More Introduction

    2,4-Difluorophenylhydrazine Hydrochloride: From Synthesis to Real Laboratory Results

    What Sets 2,4-Difluorophenylhydrazine Hydrochloride Apart

    Out on the production line, every chemical behaves in its own unique way. 2,4-Difluorophenylhydrazine Hydrochloride stands out from many related compounds because of its balanced reactivity and reliability in downstream reactions. It shows a specific set of features that can only come after years of practical synthesis and dedicated adjustment of process parameters. In our facilities, we monitor the process at every stage, from raw material selection right through to final quality testing, so you won't face batch-to-batch surprises.

    A close working knowledge of fluorinated hydrazines has taught us a few lessons. One, purity must remain consistent: impurities, even in low parts-per-million thresholds, can alter selectivity in follow-on reactions. Two, storage conditions and handling methods need to favor thermal stability and shelf life. Some related phenylhydrazines degrade easily or clump under improper conditions, but 2,4-Difluorophenylhydrazine Hydrochloride, when manufactured and stored with care, avoids these pitfalls.

    Our Real-World Approach to Manufacturing

    As a manufacturer, we never lose sight of the end use. The production of 2,4-Difluorophenylhydrazine Hydrochloride draws on a controlled environment: filtered air, moisture control, chemical hygiene, rigorous personnel training, and regular equipment checks. Chlorination, fluorination, diazotization—these stages depend as much on operator know-how as on instrumentation. Our operators monitor color changes, viscosity, and sometimes odor before numbers reach the lab. Continuous feedback from the QC lab informs slight adjustments so that each kilogram exits with the target assay and meets recognized impurity thresholds.

    Though standardized protocols keep things steady, the process doesn’t run on autopilot. Every adjustment stems from experience with the chemistry. Acid strength, solvent quality, temperature uniformity, and dosing rate play significant roles. We’ve seen that certain hydrazine salts tend to absorb moisture during grinding or transfer, so the team reduces time between isolation and packing. This simple step prevents caking and keeps the hydrochloride free-flowing. The outcome: handlers in research and plant-scale environments enjoy material that doesn’t clump in the bottle or hopper—sometimes overlooked, but vital for accuracy in weighing and dosing.

    Specifications and Quality Observations

    2,4-Difluorophenylhydrazine Hydrochloride offers reliable properties, shaped by the synthesis route and purification steps. Years of monitoring melting points, IR spectra, and HPLC purity readouts show us that the product’s stability comes from a balance of precisely controlled pH during precipitation and prompt removal of solvents after filtration. Failure to maintain these steps can shift appearance from crisp crystalline powder to off-white lumps or, worse, an oily residue, both of which complicate handling and inclusion in further synthesis.

    Our product exits the drying oven within narrow moisture tolerances, avoiding clumping and premature dissolution, because even slight contamination skews reaction times or downstream yields. We've seen that color and particle size distribution let us spot deviations early—so we inspect each production batch under variable lighting, using both visual checks and advanced imaging to catch anything a machine-rendered report might miss.

    Experience in Industrial and Research Applications

    Labs and industrial projects call for different priorities, but both face real-world pressures: project timelines, limited budgets, ever-changing regulatory rules, and the need for accurate reproducibility. 2,4-Difluorophenylhydrazine Hydrochloride has earned trust as a workhorse intermediate for creating substituted hydrazones, azo compounds, and heterocycles, especially where selective functionalization matters. Chemists working on custom pharmaceuticals, agrochemical leads, and advanced dyes depend on quality and traceability—attributes forged during not only batch production but also every hand-off, storage step, and dispatch.

    A batch once left our warehouse with slightly higher moisture than our set point, only to come back after a customer flagged slower dissolution behavior. That led us to refine our final drying methods and sampling intervals. Experiences like that shape every revision to our process. We apply these lessons, working with process engineers on solvent switches, scale adjustments, and waste reduction to fit unique workflows outside our own plant walls. Some users require anhydrous product for glovebox work, while others want material in specific particle sizes for filling microreactors; our flexibility in process allows us to address these details directly.

    The Role of Purity in Synthetic Success

    With fluorinated hydrazines, cutting corners on purification creates headaches for users relying on high yields and predictable selectivity. The presence of unreacted starting materials or side-products, even below visible detection, can influence the outcome of condensation, coupling, or acylation steps. We include LC-MS and GC runs for select batches, not just HPLC with UV-vis, since certain volatile impurities only appear in gas-phase testing. Consistent feedback from both external contract labs and advanced internal analytics allows us to spot trend shifts early—minimizing reprocessing or unexpected failures on the customer end.

    The value of this approach becomes obvious in side-by-side runs. Chemists compare our 2,4-Difluorophenylhydrazine Hydrochloride to generic hydrazines: ours provides cleaner conversions, less tar formation, and shorter purification, based on end-user feedback. One group working on pyrazole derivatives noted clearer product formation and fewer issues with by-product isolation, thanks to a cleaner input stream. That confirms, day after day, the link between careful, transparent manufacturing and downstream results.

    Handling Experience: Storage, Safety, and Shipment

    Fluorinated hydrazines demand respect in storage and transport, and we use robust packaging and clear labeling born of long experience. Once, a competitor’s product arrived caked and discolored due to porous packaging and prolonged transit in humid conditions, leading to downtime and wasted material. In response, we shifted fully to high-barrier liners and tamper-evident closures. Our batch traceability goes beyond lot numbers; we keep complete logs on every step—giving users confidence if technical or safety queries arise after delivery.

    Using safety data and practical facility audits, we set clear best practices for storage in cool, dry conditions, away from incompatible materials. Our team checks the packaging integrity and seal before shipping—if a drum or bottle doesn’t meet a simple three-point inspection, it’s pulled and repackaged. This seeds trust and keeps both operators and material safer during storage on site.

    Direct Comparison With Other Hydrazines

    Compared to plain phenylhydrazine hydrochloride or other difluorinated analogs, 2,4-Difluorophenylhydrazine Hydrochloride stands out on multiple fronts. We have found it offers more controlled reactivity during Diazo coupling due to electron-withdrawing fluorine groups, which consistently allows sharper color development in dye synthesis and more predictable outcomes in pharmaceutical intermediates. Non-fluorinated hydrazines often show higher baseline nucleophilicity and can engage in unwanted side reactions, while our 2,4-difluorinated version offers selectivity that saves chemists extra purification later.

    End-users working in specialty applications, like API intermediates or advanced organic materials, find the hydrochloride salt easier to handle than the base or free amine, due to its lower volatility and better bulk stability. There is less odor, less loss by sublimation, and cleaners bench conditions. We’ve even run head-to-head storage tests: the hydrochloride outlasts many base forms in ambient humidity, holding both its crystalline structure and solubility.

    Feedback and Continuous Learning

    Open communication with users shapes every update to our manufacturing SOPs. Over the years, requests for improved packaging, better pouring characteristics, and adjusted pH have refined both our product and our service. We've swapped out filter media that introduced particulate or fiber inclusions, adjusted particle size for improved suspension in glovebox reactors, and even collaborated directly with researchers tasked with scale-ups for novel drugs. Each phase, from small lab bottle to hundred-liter drum, brings different needs and challenges—and our team responds not by standardizing away challenges, but by listening, adjusting, and learning.

    We’ve tested alternative crystallization solvents at the request of customers with special contamination restrictions. Feedback from pilot plant runs has prompted us to improve sieving and antistatic handling. Setbacks and troubleshooting—such as accidental over-drying or minor discoloration after a QC instrument failure—show us daily the importance of vigilance and hands-on oversight. Our manufacturing team attends industry forums and stays in contact with academic groups pushing the edge of hydrazine chemistry, because innovation rarely comes from repeating what worked yesterday.

    Sustainability and Waste Reduction Initiatives

    The story of 2,4-Difluorophenylhydrazine Hydrochloride would be incomplete without considering how we manage wastes and emissions. Hydrazine chemistry produces residues and acidic liquors, and we take every step to capture, neutralize, or reuse wherever possible. Years ago, waste management was mostly about containment; now, solvent recovery and closed-loop wash cycles dominate. We track every input and output, report to local regulators with complete transparency, and pursue new synthetic routes that minimize hazardous byproducts.

    A large-scale switch to a greener oxidant cut down our effluent toxicity, winning support from both management and inspectors. Pilot tests using alternative raw materials have given us the room to further reduce carbon footprint and toxic releases beyond what’s set by law. Customers increasingly ask about EHS practices—so we host annual reviews, share independent audit summaries, and make improvements based not on compliance alone but on real impacts seen at ground level.

    Supporting Innovation in Custom Applications

    While many clients use 2,4-Difluorophenylhydrazine Hydrochloride as an off-the-shelf intermediate, we have supported custom projects that take the chemistry far beyond the usual. Every year brings new innovations in energetic materials, imaging agents, and fine chemicals that demand further tuning of our process. Our close partnership with creative chemists has let us extend our manufacturing practices: adapting to non-standard purity profiles, custom particle morphology, and alternative salt forms when needed.

    Collaborations go beyond simple supply agreements; chemists request micro-scale bottlings for discovery work, or kilogram-scale deliveries for pilot plants, and we accommodate unusual requests for documentation and technical support. Our in-house technical team provides data, advice, and troubleshooting informed by real hands-on experience—no phone trees, no canned answers, just direct access to people who actually handle and test the product every week.

    Educating on Best Use and Practical Challenges

    Getting the most out of 2,4-Difluorophenylhydrazine Hydrochloride calls for practical handling and application knowledge. Our experience shows that fresh, properly stored material ensures repeatable results, especially in air- and moisture-sensitive synthesis. Unpacking in dry boxes, minimizing open time, and using the material soon after opening protects both quality and yield downstream. Users who follow these best practices see fewer discrepancies and waste less product.

    We encourage buyers to reach out with application-specific needs, questions about compatibility with their unique workflows, or even tips on maximizing efficiency. We believe in a community-driven approach, where insights from across the globe feed directly into how we make, test, and deliver each batch.

    The Value of Consistency and Real Partnership

    Every bottle of 2,4-Difluorophenylhydrazine Hydrochloride leaving our site represents the work of a skilled team committed to delivering not just a compound but a tool that enables successful synthesis. We view every inquiry as an opportunity for partnership, every feedback call as a chance to improve, and every challenge as a lesson that strengthens future batches.

    In a world of commoditized sourcing and anonymous intermediaries, manufacturing chemistry still thrives on skill, direct oversight, and clear communication. The people behind this product stand ready to solve problems, offer support, and share their years of practical experience—directly, openly, and honestly.