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O,O-Diethyl-O-2,5-Dichloro-4-Methylthiophenyl Phosphorothioate

    • Product Name O,O-Diethyl-O-2,5-Dichloro-4-Methylthiophenyl Phosphorothioate
    • Alias Fenthion
    • Einecs 245-009-0
    • Mininmum Order 1 g
    • Factory Site Tengfei Creation Center,55 Jiangjun Avenue, Jiangning District,Nanjing
    • Price Inquiry admin@sinochem-nanjing.com
    • Manufacturer Sinochem Nanjing Corporation
    • CONTACT NOW
    VTB
    Specifications

    HS Code

    202012

    Chemical_Name O,O-Diethyl-O-2,5-Dichloro-4-Methylthiophenyl Phosphorothioate
    CAS_Number 133-07-3
    Molecular_Formula C11H15Cl2O3PS
    Molecular_Weight 345.18 g/mol
    Appearance Colorless to pale yellow liquid
    Solubility_in_Water Insoluble
    Density 1.34 g/cm³
    Melting_Point -20°C to -17°C
    Vapor_Pressure 1.2 × 10⁻³ Pa at 20°C
    Flash_Point 109°C
    Use Insecticide (also known as fenthion)
    Stability Stable under normal storage conditions
    Odor Slight mercaptan odor

    As an accredited O,O-Diethyl-O-2,5-Dichloro-4-Methylthiophenyl Phosphorothioate factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.

    Packing & Storage
    Packing The packaging contains 500g of O,O-Diethyl-O-2,5-Dichloro-4-Methylthiophenyl Phosphorothioate in a sealed, amber glass bottle with hazard labeling.
    Shipping O,O-Diethyl-O-2,5-Dichloro-4-Methylthiophenyl Phosphorothioate must be shipped as a hazardous chemical, in accordance with relevant regulations. It should be packed in sealed, chemical-resistant containers, clearly labeled, and cushioned to prevent breakage. Ensure proper documentation (SDS included) and transport via a certified carrier specializing in hazardous materials.
    Storage O,O-Diethyl-O-2,5-dichloro-4-methylthiophenyl phosphorothioate should be stored in a tightly closed container, in a cool, dry, well-ventilated area away from incompatible materials such as strong oxidizers and acids. Protect from moisture, heat, and direct sunlight. Store in a locked chemical storage cabinet with proper labeling. Use secondary containment to prevent spills or leaks, and ensure proper environmental controls.
    Application of O,O-Diethyl-O-2,5-Dichloro-4-Methylthiophenyl Phosphorothioate

    Applications of O,O-Diethyl-O-2,5-Dichloro-4-Methylthiophenyl Phosphorothioate in Industrial Manufacturing

    Our direct-manufactured O,O-Diethyl-O-2,5-Dichloro-4-Methylthiophenyl Phosphorothioate supports downstream clients in precise formulation and controlled integration across key industrial sectors. Below are the major real-world application scenarios, each detailed by compliance requirements, formulation guidelines, process adaptation, and the final product outputs as implemented by downstream producers.

    1. Crop Protection Formulation for Agricultural Insecticides

    This organophosphate compound functions as an active ingredient within specific narrow-spectrum insecticides, particularly in intensive crop systems that target aphids and leafhoppers. Downstream agrochemical manufacturers rely on exact dosing for safe and regulatory-compliant products, demanding rigorous traceability from raw material input through to field-use approval.

    Industry compliance standards

    • FAO/WHO Pesticide Specifications (e.g., FAO/WHO 2021 standards for insecticide content and impurities)
    • National Registration Standards (e.g., US EPA, EU Regulation (EC) No 1107/2009, China ICAMA)
    • REACH/CLP for downstream supply and hazard classification
    • ISO 9001:2015 based process and batch documentation systems

    Typical usage ratio

    • Formulators commonly employ concentrations from 15% to 40% w/w as technical concentrate, later diluted to 0.1%–0.35% w/v for commercial EC (Emulsifiable Concentrate) or SC (Suspension Concentrate) products. Final ratios depend on target pest spectrum and label regulations.

    Downstream process integration

    • Insecticide producers introduce the material during pre-emulsification or blending phases after solvent and co-formulant charging, closely monitoring for batch homogeneity prior to downstream QC and packaging steps.

    Final product types

    • Commercial field-use insecticide concentrates (EC, SC, microcapsule suspensions)
    • Pre-mixed wettable powder shelf packs for agricultural distribution
    • Bulk insecticide intermediates supplied for local in-country repackaging
    • Labeled retail-use agricultural insecticides for licensed crop applications

    2. Seed Treatment Additive in Cereal and Oilseed Processing

    Downstream seed enhancement specialists employ this raw material as an insecticidal seed treatment, optimizing safe crop emergence while mitigating risk of soil-borne pests and storage insects. Integrated batch controls and precise ingredient handling define all production phases for compliance with global seed certification regimes.

    Industry compliance standards

    • ISTC (International Seed Testing Association) Seed Treatment Quality Standards
    • National Seed Treatment Legislations (e.g., US EPA PRIA, Canadian PMRA guidance for seed-applied pesticides)
    • OECD Guidelines for the Testing of Chemicals—seed treatment efficacy and residue monitoring
    • ISO 17025 accredited laboratory verification during batch release

    Typical usage ratio

    • Applied at levels between 0.5 to 2.5 g a.i./kg seed, tailored for crop species, seed size, and targeted pest exposure periods.

    Downstream process integration

    • Seed processors add the ingredient during rotary drum or batch coating operations, incorporating polymer binders and colorants, with mixer validation and QC draw-off for residual active checks prior to packaging.

    Final product types

    • Commercially treated cereal seed lots (wheat, barley, oat) for wholesale agriculture supply
    • Pre-packaged, labeled seed treatment kits for regional cooperatives
    • Oilseed starter packs (canola, soy) designed for large-scale sowing campaigns
    • Retail-packed mixed grain products with documented shelf-life studies

    3. Stored Grain Protection in Post-Harvest Facilities

    Bulk grain handlers and storage facility operators rely on phosphorothioate-based actives to formulate specialty protectants for long-term stored grains. Specialized processing lines integrate approved content levels for effective insect pest management without compromising grain quality or food chain integrity, strictly enforcing regulatory MRLs.

    Industry compliance standards

    • Codex Alimentarius MRLs (Maximum Residue Limits) for food/feed grains
    • FDA CFR 40—Pesticide Chemicals on Food Products
    • USDA-GIPSA storage facility management protocols
    • ISO 22000:2018 Food Safety Management for food-contact downstream steps

    Typical usage ratio

    • Post-harvest application rates range from 2 mg/kg to 8 mg/kg grain (a.i.), depending on resistance management protocols, anticipated storage duration, and destination market import requirements.

    Downstream process integration

    • Bulk application occurs via precision calibrated spraying systems onto conveyor-line grain mass or as fogged treatments in silos, with subsequent low-velocity aeration for even distribution and on-site residue monitoring.

    Final product types

    • Bulk stored grain batches (wheat, corn, rice, barley) for food/feed export
    • Packaged pest-protected grain lots for food processors
    • On-farm grain store protection products for large-scale commodity operations
    • Private-label storage protection agents for commercial storage networks

    4. Formulation of Veterinary Ectoparasite Control Products

    Livestock veterinary pharmaceutical manufacturers formulate phosphorothioate derivatives into targeted control agents against external parasites including lice, ticks, and mites in cattle, sheep, and companion animals. Intense regulatory scrutiny governs all process steps, from preparation through residue and toxicological profiling in finished goods.

    Industry compliance standards

    • VICH GL42 (Veterinary International Cooperation on Harmonisation of Technical Requirements—phase II residue testing)
    • EU Regulation (EU) 2019/6 on Veterinary Medicinal Products
    • Good Manufacturing Practice (GMP) standards (e.g., PIC/S PE 009)
    • ISO 13485 Quality Management Systems for veterinary medical devices

    Typical usage ratio

    • Finished topical or pour-on treatments typically contain 1% to 7% w/v of active ingredient; precise inclusion varies depending on livestock species and application mode, adjusted for withdrawal period compliance.

    Downstream process integration

    • Veterinary formulations incorporate the ingredient during non-aqueous blending, followed by rigorous micro-filtration, pre-stability sampling, and monitored filling into calibrated dosing applicators.

    Final product types

    • Animal topical pour-on insecticide liquids for cattle and sheep
    • Ectoparasite-control dusting and dipping powders for mixing at farm
    • Pre-measured single-use veterinary dose packs for field veterinarians
    • Companion animal external parasite collars and spot-on solutions

    5. Synthesis Intermediate for Specialty Agrochemical Compounds

    Specialty chemical and agrochemical producers utilize the material as a phosphorus source or intermediate during the multi-step synthesis of advanced crop protection molecules, where robust process analytics and stringent material traceability are required at all engineering control points for high-purity output and regulatory submission readiness.

    Industry compliance standards

    • REACH—Annex VII & VIII for intermediate registration and use documentation
    • OECD Good Laboratory Practice (GLP) for process development studies
    • ISO 9001:2015 and ISO 14001:2015 process and environmental management controls
    • EU Regulation (EC) No 1907/2006 toxicity and impurity threshold requirements

    Typical usage ratio

    • As a synthesis intermediate, addition volumes range from 3% to 12% molar equivalent, determined by the specific downstream molecule synthesis route and reactivity.

    Downstream process integration

    • Chemical synthesis units add the compound in semi-batch reactors under strict pH and temperature control to yield advanced phosphorus-based intermediates; full traceability is maintained through process analytical technology and multi-stage filtration/purification.

    Final product types

    • Custom active ingredient intermediates for further crop protection synthesis
    • Agrochemical technical grade pre-products for downstream active synthesis
    • High-purity building blocks for proprietary pesticide molecule development
    • Contract manufactured intermediates for multinational agrochemical corporations
    Free Quote

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    Certification & Compliance
    More Introduction

    Introducing O,O-Diethyl-O-2,5-Dichloro-4-Methylthiophenyl Phosphorothioate: A Manufacturer’s Perspective

    Focusing on What Makes This Molecule Matter

    People sometimes overlook the story that chemicals like O,O-Diethyl-O-2,5-Dichloro-4-Methylthiophenyl Phosphorothioate actually tell about progress in agriculture, pest management, and chemical manufacturing. Behind its long name sits a molecule with a proven reputation in the formulation of select agrochemical products. We have worked with this compound in a hands-on way, tuning both the process and final characteristics with the end user’s safety, reliability, and environmental compatibility in mind.

    Model and Specifications – Made by Us, Defined by Precision

    The product coming out of our own reactors, under our supervision, is not some generic phosphorothioate plucked blindly from an anonymous catalog. Quality keeps its edge only through tight process control. Batch-to-batch purity stays around 96–99%. Crystal appearance varies only within narrow, acceptable ranges—reflecting proper drying and particle handling as per the design of our reactors and dryers. Moisture content is checked before packaging, and after blending, to keep decomposition risks down. We use analytical safeguards, from gas chromatography to titration, to confirm it’s the exact molecule and nothing is being left to chance.

    A technical material like this needs a steady physical form. Ours is a slightly off-white crystal or powder, not a sticky or humid clump. Particle size falls in a manageable, free-flowing range, which minimizes caking during storage and transfer. Some users ask why we don’t make it finer or coarser. In practical terms, finer materials pose dust exposure risks, while coarser cuts tend to leave undissolved remains in application tanks. We have settled on the form best able to dissolve cleanly and carry through with other formulation partners, such as adjuvants or emulsifiers, without destabilizing the whole system.

    From Synthesis to Final Use—Why Our Process Matters

    Talk to anyone who works on an actual synthesis line. A lot of pride gets channeled into the control of side reactions for this sort of molecule. Phosphorothioates come with their own chemistry headaches—from keeping hydrolysis at bay to avoiding side products that sap purity. Our process relies on dry conditions, carefully controlled temperature, and select chlorinating agents. Workers have learned what chlorine smell means and what a sulfur off-note signals for the integrity of a batch. Regular checks for by-products keep ultimate purity higher, meaning less surprise later in the distribution chain.

    We don’t hand over the material for packaging until it’s clear every lot meets the target phosphorus and sulfur content, as well as the specified dichloromethylthiophenyl arrangement. This lets downstream formulators prepare their products with more confidence. Sourcing straight from the manufacturer, customers can track quality trends and raise any issues directly to our lab teams—not through relayed third-party channels losing technical information at each step. The direct feedback loop between maker and user closes gaps that might otherwise erode safety or performance.

    Usages: Real-World Application and Practical Stories

    This molecule delivers when used as an active ingredient in certain insecticides and acaricides. Agrochemical formulators value its proven track record against pests like leafhoppers and planthoppers. On the field, this translates to sustained crop health—often in rice, cotton, or orchard settings where high pest pressure can destroy yields. The chemical interrupts the nervous systems of targeted insects, while showing reasonable safety profiles in managed agricultural contexts. We design the crystalline form to blend easily into common carrier solvents or wettable powder bases. Blending occurs in warm, ventilated environments—for safety and for completeness—ensuring every granule disperses evenly without residual clumping.

    After field application, it’s not rare to hear growers comment on the speed of pest knockdown. Results also depend on local climate and pest lifecycle. Using this ingredient in a mix, especially with agents targeting different pest metabolic pathways, helps slow resistance. This strategy, called rotational use or tank-mixing, stands behind the product’s continuing value after decades of deployment. We listen carefully when agricultural partners report real-world outcomes. Our R&D team uses those stories to spot formulation issues early, so process improvements genuinely matter—not just on paper, but for those counting on a good harvest.

    Manufacturing for real-world use means facing scrutiny on environmental traceability and residual impact. With regulation tightening, we keep full audit records on batch production. Documenting the origin of precursor chemicals, recording reactor logs, and logging every in-process QC checkpoint allows both authorities and partners to track each shipment’s compliance. This chain of data builds trust all the way down to the farm level, providing greater transparency than traders and resellers can offer.

    What Sets Our Material Apart from Other Products

    Comparison comes up each season. Some customers have switched between O,O-Diethyl-O-2,5-Dichloro-4-Methylthiophenyl Phosphorothioate from different sources, or moved to alternative actives based on local rules or pest patterns. Two main differences stand out. First, purity and batch consistency affect how reliably downstream products do their job. Lower-grade imports sometimes leave excessive insoluble residues, or show evidence of breakdown before farm delivery. Our material, manufactured and shipped directly, avoids these issues because every package becomes traceable back to the exact day of production and the specific reactor batch. We notice fewer claims of product-efficacy drift or unexpected sediment, which means less downtime for farmers and less burden on pest-control operators.

    Second, environmental and toxicology compliance moves out of the abstract and into everyday work routines. Because our own chemists oversee raw material sourcing—including chlorinating agents and thiophenols used in the process—any irregularity or deviation is spotted early. Close supplier relationships help us press for cleaner inputs, which reflect in fewer hazardous impurities in the final product. Our team works within regulatory guidelines set by both domestic and international agencies. Rather than chasing mere compliance, we advance internal clean-manufacturing benchmarks—testing wastewater, minimizing spill risk, and opting for packaging based on safety metrics and recyclability. This not only insulates our partners against surprise regulatory findings, but also supports their own crop-use certification processes.

    Addressing Challenges—From Plant to Field

    As the industry evolves, so do the expectations. Pest resistance continues to pressure chemical design and stewardship. The product’s mode of action faces periodic review under global pesticide assessment frameworks. We follow new data, participate in industry consortia, and share anonymized residue and persistence data to help address emerging regulatory challenges. Honest communication around product limitations and strengths matters. For end-users, our technical panels can advise on buffer zones, handling protocols, and calibration practices for different climates—drawing from decades of collective field experience.

    Another challenge comes from supply chain disruptions. Since the molecule relies on specialty intermediates—chlorinated aromatics and phosphorothioating reagents—global shifts in raw material flows can threaten prompt delivery. We mitigate this risk through in-house intermediate production and long-standing local supplier networks. Our warehouses stock critical precursors and maintain buffer stocks during busy seasons. By running multiple synthesis lines, we flexibly scale production in step with agricultural demand cycles without resorting to uncontrolled overtime or rushed procedures that could cut corners on safety or quality.

    Worker safety stands as a non-negotiable value. Handling sulfur-containing reagents and chlorine donors carries specific occupational risks—nobody knows this like the team members doing the job every day. We keep exposure within recommended limits using closed systems and local extraction, plus robust training. No shortcut substitutes for continuous monitoring. Routine medical screening and anonymous reporting help us spot any emerging concerns before they threaten long-term health. Our plant’s safety record speaks for itself—something our staff and their families treat with the gravity it deserves.

    Supporting Sustainable Agriculture—A Holistic Approach

    The pressure to grow more food on less land has put a premium on effective, reliable, and professionally manufactured crop protection agents. O,O-Diethyl-O-2,5-Dichloro-4-Methylthiophenyl Phosphorothioate, when made to tight tolerances, supports that push. Looking past just the chemistry, we join with partners up and down the chain—agronomists, distributors with technical field support, and even grower associations—to share data and practical tips for best stewardship. Integrated pest management doesn’t stand on one chemical; it relies on multiple, harmonized tools. We provide honest input to ensure the ingredient aligns with modern, sustainable practices—whether that means reduced rates, precision application technology, or careful residual monitoring near sensitive habitats.

    For those striving to balance pest control with biodiversity or pollinator safety, our team can direct resources toward solutions. Education keeps risky misuse down—blunt approaches from the past, where spray rates exceeded recommendations, have faded in light of closer scrutiny and best-practice training. Field demo plots, jointly hosted with local partners, help new users see in practical terms how to mix, apply, and dispose of leftovers safely. We don’t just ship a drum and call it finished.

    Continuous Improvement—Listening and Acting

    After years in the industry, complacency delivers more problems than progress. Each growing season presents its own surprises—weather, pest migration, regulatory shifts, and evolving user preferences. We value feedback, whether praise or criticism. Customer field teams visit us regularly to discuss performance, safety incidents, or just “how it ran this year.” Every concern helps sharpen our process, prompting innovation in synthesis, blending, packaging, and stewardship. Our plant management keeps a direct line open for technical and quality questions—speeding up troubleshooting and reinforcing accountability.

    Sometimes, process tweaks look small—a shift in drying curve, a replacement packing gasket, a new solvent blend. Over time, these adjustments build a more robust product. The sum of controlled improvements, sparked by actual field needs rather than paperwork, accumulates into a difference that shows in every subsequent batch. Whether it’s a midseason rain or a sudden raw material shortage, the ability to adapt pays off both within the plant and across the supply chain that depends on us.

    Connecting Innovation with Responsibility

    Chemicals like O,O-Diethyl-O-2,5-Dichloro-4-Methylthiophenyl Phosphorothioate form the backbone of many essential agricultural strategies. Their value, though, rests on both performance and trust. Earning that trust requires more than compliance; it asks for open records, careful science, and responsible citizenship in the broader chemical ecosystem. Our commitment includes regular audits, reinvestment in cleaner technology, and a voice in shaping responsible regulatory frameworks.

    For those working in agriculture, seeing a season through with minimal crop loss, effective pest suppression, and least possible environmental tradeoff remains an everyday priority. Our company—led by a team who comes from scientific, engineering, and farm backgrounds—doesn’t lose sight of that common goal. O,O-Diethyl-O-2,5-Dichloro-4-Methylthiophenyl Phosphorothioate holds its place not because of advertising, but because year after year it performs, traceable down to each individual production lot, backed by direct collaborative support. From the reactors to shipment and beyond, we remain dedicated to knowing our products, standing behind our process, and understanding the actual needs of the people who use what we make.