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Diethylfosfit

    • Product Name Diethylfosfit
    • Alias Phosphonic acid, diethyl ester
    • Einecs 203-047-2
    • Mininmum Order 1 g
    • Factory Site Tengfei Creation Center,55 Jiangjun Avenue, Jiangning District,Nanjing
    • Price Inquiry admin@sinochem-nanjing.com
    • Manufacturer Sinochem Nanjing Corporation
    • CONTACT NOW
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    Specifications

    HS Code

    920932

    product_name Diethylfosfit
    chemical_formula C4H11O3P
    molar_mass 138.10 g/mol
    appearance Colorless liquid
    density 1.065 g/cm3
    boiling_point 181°C
    melting_point -80°C
    solubility_in_water Reacts slowly with water
    flash_point 71°C
    CAS_number 122-52-1
    odor Characteristic, pungent
    refractive_index 1.409
    purity Typically ≥97%
    vapor_pressure 0.45 mmHg at 25°C
    stability Stable under recommended storage conditions

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

    Packing & Storage
    Packing Diethylfosfit is supplied in a 500 mL amber glass bottle with a secure screw cap, labeled with hazard and handling information.
    Shipping Diethylfosfit should be shipped in tightly sealed containers, protected from moisture and direct sunlight. It must be handled as a hazardous chemical, in compliance with local and international transport regulations. Ensure proper labeling, use suitable cushioning to prevent breakage, and keep away from incompatible substances to avoid dangerous reactions during transit.
    Storage Diethylfosfit should be stored in a tightly sealed container in a cool, dry, and well-ventilated area, away from sources of ignition and direct sunlight. Keep it separate from strong oxidizing agents, acids, and moisture. Store in a chemical storage cabinet suitable for flammable or reactive liquids, and ensure proper labeling. Handle only with appropriate personal protective equipment.
    Application of Diethylfosfit

    Applications of Diethylphosphite in Industrial Manufacturing

    Diethylphosphite serves as a strategic intermediate in multiple sectors of chemical manufacturing, supporting critical downstream transformations and product quality benchmarks. As a direct producer with years of synthesis and formulation expertise, we supply this raw material to established value chains where its unique reactivity underpins functional group incorporation, stabilization, and specialty conversion. Below, we detail the principal sectors and manufacturing contexts where diethylphosphite plays a defined, indispensable role, specifying relevant industrial practices for quality-oriented buyers.

    1. Agrochemical Synthesis: Organophosphorus Pesticide Intermediates

    Leading agrochemical producers utilize diethylphosphite as a phosphorylating agent when manufacturing specific insecticide and fungicide active ingredients. The phosphate moiety introduced via this intermediate is essential for downstream compounds such as dichlorvos and other phosphonate derivatives, all synthesized under regulated manufacturing conditions for market eligibility in different agricultural jurisdictions.

    Industry compliance standards

    • FAO/WHO Specifications for Plant Protection Products
    • REACH Regulation (EU)
    • US EPA Pesticide Registration Process
    • ISO 9001:2015 (Quality Management for Chemical Synthesis)

    Typical usage ratio

    • 0.8–1.1 molar equivalents relative to halogenated precursor, adjusted per target yield and side-reaction monitoring
    • Final batch concentration in multi-step synthesis: 5–12% w/w depending on downstream conversion stage

    Downstream process integration

    • Reacted in situ during the Michaelis-Arbuzov or Michaelis-Becker reaction steps as the phosphoryl source
    • Integrated by continuous feed or batch-wise addition in jacketed reactors under controlled temperature ramping

    Final product types

    • Organophosphorus insecticides (e.g., dichlorvos, mevinphos)
    • Fungicidal active intermediates for further derivatization
    • Phosphonate-based herbicide synthesis intermediates

    2. Pharmaceutical Intermediate: Synthesis of Nucleotide Analogs

    In the pharmaceutical sector, process chemists rely on diethylphosphite for the phosphorylation of nucleoside analogs and other drug molecules requiring organophosphorus groups. The material enters GMP-controlled facilities, participating in multi-step active pharmaceutical ingredient (API) manufacture for antiviral, anticancer, and cardiovascular drugs.

    Industry compliance standards

    • ICH Q7 Good Manufacturing Practice (GMP) for APIs
    • European Pharmacopoeia/USP Monographs (pertaining to phosphorylated APIs)
    • US FDA 21 CFR Part 211 (Finished Pharmaceuticals)
    • ISO 9001:2015 certification (process documentation)

    Typical usage ratio

    • 0.95–1.1 molar equivalents per nucleoside substrate, modulated for side-product control and target yield
    • Formulation concentration: tailored between 1–6% w/w based on throughput and reactor sizing

    Downstream process integration

    • Employed during the phosphorylation reaction phase under inert atmosphere
    • Added in strictly staged steps to minimize over-phosphorylation and hydrolysis in API synthesis

    Final product types

    • Phosphorylated nucleoside antiviral intermediates (e.g., tenofovir analogues)
    • Prodrug components and nucleotide-based chemotherapy intermediates

    3. Polymer Additives: Flame Retardant Manufacturing

    Within the plastics and engineered polymers industry, diethylphosphite is incorporated as a reactive intermediate for manufacturing organophosphorus flame retardants. These additives, derived from phosphorus-bearing agents, subsequently blend into polyurethanes, polyesters, and thermoplastics, offering fire resistance according to international flammability and safety mandates.

    Industry compliance standards

    • UL 94 (Flammability Standard for Plastic Materials)
    • EN 45545-2 (Fire Protection for Rail Applications)
    • REACH Regulation for Flame Retardants
    • RoHS Directive (Heavy Metal & Flame Retardant Restrictions)

    Typical usage ratio

    • 3–15% w/w relative to the polymer formulation, optimized based on polymer type and required limiting oxygen index (LOI)
    • Precise loading determined in lab-proven compounding trials

    Downstream process integration

    • Serves as a polyol modifier or phosphorus donor in the reactive blending of flame-retardant masterbatches
    • Introduced prepolymerization for functionalized polypropylene or directly into extruders during compounding

    Final product types

    • Flame-retardant polyolefin pellets
    • Fire-protected polyurethane foams
    • Thermoplastic insulation sheets for electronic applications

    4. Surface Treatment: Metal Phosphating Agent

    Metal finishing operations extensively apply phosphating agents derived from diethylphosphite for corrosion protection and paint adhesion on steel and galvanized substrates. Diethylphosphite enables production of specialty phosphate conversion coatings under controlled, industrial-scale surface treatment protocols.

    Industry compliance standards

    • ASTM B117 (Salt Spray Testing)
    • ISO 9227 (Corrosion Tests in Artificial Atmospheres)
    • DIN 50942 (Phosphate Coatings of Iron and Steel)
    • ISO 9001 (Surface Treatment Processes)

    Typical usage ratio

    • 2–5% w/w diethylphosphite solution in aqueous treatment baths, adjusted by line speed and surface area to be treated
    • Bath composition regularly monitored to ensure phosphate deposition thickness

    Downstream process integration

    • Feeds directly into continuous or batch immersion phosphating lines
    • Applied prior to electrophoretic or powder coating steps in OEM and metal part finishing plants

    Final product types

    • Corrosion-resistant automotive chassis components
    • Appliance housings with phosphate conversion layers
    • Electroplating base layers on steel fasteners

    5. Fine Chemical Synthesis: Phosphonate Ligand and Chelating Reagent Production

    Producers in the specialty chemicals sector count on diethylphosphite to synthesize phosphonate-based chelating agents and customized ligands for industrial water treatment, scale inhibition, and metal sequestration. The compound’s controlled reactivity profile allows for targeted functionalization without introducing excessive byproducts in multi-step organic syntheses.

    Industry compliance standards

    • ISO 14001:2015 (Environmental Management for Chemical Manufacturing)
    • REACH Registration (for industrial water treatment chemicals)
    • ASTM D5358 (Performance of Antiscaling Agents)
    • ISO 9001 (Process Quality Control)

    Typical usage ratio

    • 1.0–1.2 molar equivalents per chelate precursor, with final batch concentrations of 5–18% w/w tailored to customer technical specs
    • Dosing precision managed with in-line monitoring and feedback adjustment

    Downstream process integration

    • Enters at the condensation step under base catalysis in multi-stage reactors
    • Blended in jacketed glass-lined vessels for scale inhibitor precursor formation

    Final product types

    • Phosphonate-based scale inhibitors for industrial water systems
    • Specialized ligand packages for oilfield and cooling water application
    • Water softening agents for municipal and power plant infrastructure
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    Certification & Compliance
    More Introduction

    Diethylfosfit: Thoroughly Refined for Chemical Manufacturing

    There’s an immediate difference you notice once you work with diethylfosfit made on-site at our facilities. For more than a decade, we have fine-tuned the continuous production process down to each detail, harnessing direct feedback from end-users who rely on purity and reactivity batch after batch. What lands in our drums has nothing accidental about it; every molecule is tracked from point of raw material input to final filtration and nitrogen blanketing. Skipping unnecessary additives is just part of routine vigilance to keep the product exactly as it should be, whether heading for export or local processing.

    Model, Quality, and Batch Differences

    Our core diethylfosfit model achieves a purity range above 98.5%, confirmed by both in-house and third-party analytics. We only use direct esterification of phosphorus trichloride and absolute ethanol, since alternative pathways can introduce byproducts that complicate downstream synthesis. Starting material selection remains hands-on. Each batch undergoes strict GC analysis before leaving the reactor hall. You’ll see slight texture variations in bulk shipments through the year, particularly after major downstream disruptions cause raw ethanol markets to wobble, but we've learned how to maintain consistency through diligent solvent recovery and rigorous reactor cleaning protocols.

    Compared to certain traders offering “technical grade” or “imported substitutes”, ours holds up in flame-retardant applications, organic synthesis, and many agrochemical sectors. Years ago, a client in the fine chemical field raised concerns about inconsistent color and yield loss; we traced most of the problem back to trace chloride residues left from rapid, half-closed batch cycles. Fixing this meant overhauling our washing columns and lengthening reaction times, but production stability more than made up for the change. Now production managers in similar industries don’t have to dose antioxidants or transesterify extra byproducts just to compensate for inferior material. The difference between just acceptable diethylfosfit and ours comes out during scale-up in pilot trials or continuous dosing.

    Process Insights and Handling Experience

    No one wants surprises in the tank farm. Diethylfosfit’s volatility in open air has prompted us to focus on closed system transfers, which cut losses nearly 6% compared to open-drum dispensing just six years ago. Temperature control in storage sits between 15°C and 25°C. We learned early on to keep it tightly nitrogen-blanketed, since the compound pulls moisture out of the air within hours, introducing acidity and turning fresh product murky. For transport, our product always ships in clean lined drums or ISO tanks, every one purged and sealed after filling. The effort means nearly no off-spec returns due to hydrolysis or polymerization.

    Several industries lean on strict shelf-life. Tests have shown a well-sealed drum kept in good conditions will keep activity and clarity better than 16 months. Our factories track real user conditions and document drum turnover rates, so the product in your pipeline sees less than half that age, even on multi-stop domestic routes.

    How Diethylfosfit Compares in Real Chemical Synthesis

    Talk to plant chemists and you’ll soon hear where subpar diethylfosfit causes daily headaches. In the production of certain flame retardants and stabilizers, unreacted phosphorus trichloride traces released as HCl vapors lead to corrosion, batch yield swings, and extra downtime for reactor washes. We invested in better column separation and neutralization protocols so typical downstream phosphite yields climb 1–3% per batch. In one year, a mid-sized resin maker saved over $250,000 just by switching to a consistent batch run—data they gladly repeat at technical visits.

    Over the past few years, cheaper global supply chains have introduced competing products characterized by vague specification sheets and limited quality documentation. We don’t rely on brokers. Every kilogram shipped tracks to a lot history, root cause analysis for any deviation, and multiple operator sign-offs. This level of documentation helps users adapt quickly if they need to trace problems during process upsets, and this has made our name stick with the same buyers for years, even while others drift between suppliers every contract cycle.

    Usage Realities and End-User Feedback

    Many processors use diethylfosfit as a phosphorus source or reducing agent. As a manufacturer, we pay attention to the nitty gritty that makes operators’ lives smoother. Pesticide intermediates, plasticizers, or even those developing catalysts for polymerization see a direct impact from side impurities, which is why field visits always include thorough Q&A. In the last customer symposium, one polyurethane resin processor described how rapid color shift in their final product traced back to oxidized phosphorus compounds. After implementing our tighter drum-sealing protocols, those instances fell by 90%.

    Some of the best feedback comes not from high-level procurement managers, but from technicians who actually pump or blend the product into their reactors. These users consistently cite handling ease—free from viscous build-up at room temperature, low tendency to clog dosing lines, and no need for special additives to counter unwanted reactivity. Monthly technical service visits confirm these findings on a working line, providing us with fresh pointers on what works, what to monitor, and where to keep refining plant protocols.

    Manufacturing for a market filled with technical grade and off-brand imports, we tap into firsthand reports of how these substitutes affect end-product quality. Lower-grade supplies bring inconsistency. Our ongoing collaboration with downstream users tells us that our diethylfosfit shaves hours off each production lot due to its stability, and rejects drop sharply across the main synthetic applications. Consistency makes a measurable difference in throughput and final quality.

    Continuous Improvements and Sustainability Practices

    Years in chemical manufacturing teach respect for process safety and environmental responsibility. Diethylfosfit production comes with risk—reactors need regular integrity checks, and the right level of continuous emissions monitoring. We reduce phosphorus losses through in-plant recycle loops. Spent washes find use in neutralizing secondary effluents after metals removal, and staff receive hands-on hazard training updated with every safety incident learnings both from our plant and partners worldwide.

    Our commitment extends to waste reduction and emissions controls. All phosphorus-containing waste streams run through chemical scrubbers, and process water faces biological pre-treatment before discharge. The on-site labs track each pollutant according to national discharge limits and issue reports accessible for auditors and partners seeking compliance clarity. This cycle of reusing, reducing, and documenting steps has minimized regulatory headaches for our partners downstream.

    From Batch Runs to Bulk Orders

    Scaling production comes with its own set of difficulties. Solving problems from one-ton pilot batches up to 100-ton campaigns means regularly tuning reactor temperature profiles, ramping up solvent recovery, and switching between drum and ISO-tank logistics. Staff know firsthand that even a small slip—like missing a drum seal or skipping a column flush—shows up sharply in customer feedback within weeks. That kind of direct loop from plant to customer and back is what keeps consistency at the forefront of everything we process and ship.

    Changing logistics needs prompted us to develop flexible packaging. Drums for regional short hauls use single-use liners and steel seals; ISO tanks allow multi-national deliveries without batch aging or atmospheric exposure. We instruct every logistics partner in product-specific transfer protocol—not to complicate life, but to prevent common mishaps that cost both us and the customer.

    Regulatory and Market Adaptation

    Industry regulations on purity and trace byproduct levels grow more stringent yearly. In 2023, for instance, lowered allowable PCl3 residues in food-contact phosphite stabilizers forced us to revalidate our column designs and even swap suppliers for ethanol to hit the target. Each regulatory shift drives another round of investment—in instrumentation, raw material sourcing, third-party certifications. Clients appreciate not having to audit a new supplier for each round of tightened rules, letting them keep existing registrations and avoid process requalification.

    Trends in some end-uses, like flame retardant additives, push for even tighter metal and halide limits due to downstream processing incompatibilities. As the market moves, we move with it. Ongoing process tuning and discussion with technical partners makes adapting specifications part of long-term supply planning, not overnight crisis management. So when the question comes up—why stick with an established manufacturer like ours—the answer lies in visible track records, not empty promises.

    A Trusted Chemical Partner

    From experience, trust grows batch by batch, not press releases or sales claims. Our open days, real-time production tours, and regular troubleshooting sessions on plant floors help build confidence in the product and our operation. Technical managers see firsthand how each challenge from their own sites feeds directly into tweaks in our operation—sometimes as small as modifying a column wash cycle, sometimes large as installing new filtration lines.

    In difficult chemical markets, buyers remember who delivered quality when shortages or delays hit. That’s how we built a client base that tracks quality history not just on certificates of analysis, but with actual downstream performance logs over multiple years. Focusing on the details—raw input provenance, batch record transparency, daily operator signoffs—has proven to be the most resilient path. Our role as a diethylfosfit manufacturer grows from this legacy and our ability to keep learning from the daily grind.

    Looking Forward

    The most credible path in chemicals involves transparency, measurable results, and keeping an ear to the ground for real production pain points. New developments in application technology, whether in flame-retardant coatings or latest-generation agrochemicals, have already steered us to increase lot-specific trace elements testing and expand aftersales process support. It’s not hype—these changes developed from practical plant needs, and we expect every future advance will come the same way: from continual feedback, regular site visits, and a readiness to invest wherever our partners’ processes demand it.

    Manufacturers in today's markets succeed on reliability, long-term collaboration, and grounded technical support. We spend every year striving not only for higher purity, but documented proof that these efforts matter at every level—from the initial handshake to the last drum on the trailer. With diethylfosfit, we keep investing in the people and processes behind every shipment, keeping us a step ahead in a business that never stops evolving.