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Dimethyl 4-(Methylthio)Phenyl Phosphate

    • Product Name Dimethyl 4-(Methylthio)Phenyl Phosphate
    • Alias MTPP
    • Einecs 259-009-6
    • 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

    170754

    product_name Dimethyl 4-(Methylthio)Phenyl Phosphate
    chemical_formula C9H13O4PS
    molecular_weight 248.24 g/mol
    CAS_number 2525-84-4
    appearance Colorless to pale yellow liquid
    boiling_point 140-142°C at 2 mmHg
    solubility Soluble in organic solvents (e.g., ethanol, chloroform)
    density 1.28 g/cm³
    purity Typically ≥ 98%
    refractive_index n20/D 1.552-1.556
    flash_point 136.4°C
    storage_conditions Store in a cool, dry place, tightly closed

    As an accredited Dimethyl 4-(Methylthio)Phenyl Phosphate factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.

    Packing & Storage
    Packing 250g of Dimethyl 4-(Methylthio)Phenyl Phosphate is supplied in a sealed, amber glass bottle with a tamper-evident cap.
    Shipping Dimethyl 4-(Methylthio)phenyl phosphate should be shipped in tightly sealed containers, protected from light, moisture, and incompatible substances. It must comply with local, national, and international chemical transport regulations. Proper labeling and documentation are required, and it is typically shipped by specialized carriers as a hazardous material, if applicable.
    Storage Dimethyl 4-(Methylthio)Phenyl Phosphate should be stored in a tightly sealed container, in a cool, dry, well-ventilated area away from incompatible materials such as strong oxidizers. Protect from moisture, direct sunlight, and sources of ignition. Ensure appropriate labeling and secondary containment. Personal protective equipment should be worn when handling, and access should be restricted to trained personnel.
    Application of Dimethyl 4-(Methylthio)Phenyl Phosphate

    Applications of Dimethyl 4-(Methylthio)Phenyl Phosphate in Industrial Manufacturing

    Dimethyl 4-(Methylthio)Phenyl Phosphate plays a significant role as a specialized intermediate and additive in multiple chemical industries. Below, we detail its technical contributions, integration stages, compliance boundaries, and direct impact on downstream end-products across real-world commercial sectors.

    1. Synthesis of Organophosphorus Pesticides

    As a direct intermediate in the agrochemical sector, this phosphate compound supports the synthesis of targeted organophosphorus pesticide actives. Its phosphoryl group reacts efficiently under controlled chlorination and methylation steps, thereby forming key phosphorothioate and phosphonate pesticide backbones. Process chemists incorporate this material following a strict workflow, optimizing reactant ratios to control purity and mitigate side-product formation. Downstream, quality assurance teams adhere closely to time-temperature-concentration profiles to meet global residue restrictions before formulating stable, application-ready pesticide granules and liquids.

    Industry compliance standards

    • FAO/WHO JMPR Guidelines for pesticide composition
    • ISO 22241 for pesticide technical material quality
    • REACH Annex XVII (EU) for organophosphate restriction
    • US EPA 40 CFR Part 180 for residue tolerance and technical grade definition

    Typical usage ratio

    • Up to 25% by weight in multi-step organophosphorus synthesis, with final content tailored based on desired pesticide molecule; higher purity grades used for low-impurity requirements in export markets

    Downstream process integration

    • Added during initial phosphorylation stage as a starting source; followed by controlled oxidation, chlorination or thioalkylation under inert atmosphere; quality monitored by HPLC and GC-MS

    Final product types

    • Technical grade insecticide intermediates
    • Emulsifiable pesticide concentrates
    • Ready-to-use agrochemical spraying solutions
    • Exported active ingredient powders for crop protection

    2. Flame Retardant Additive for Engineering Plastics

    Manufacturers incorporate this phosphate derivative into engineering-grade thermoplastic resins to enhance flame resistance, especially in polycarbonate (PC) and acrylonitrile butadiene styrene (ABS) applications. The compound integrates directly at the compounding stage, interacting with polymer chains to disrupt combustion processes and lower smoke toxicity. Strict batch mixing protocols and elevated screw extruder settings ensure full dispersion. Materials science laboratories routinely test for limiting oxygen index and UL 94 flammability compliance before converting compounded resin into electrical housings and automotive parts.

    Industry compliance standards

    • UL 94 Flammability Standard
    • IEC 60695-2-11 Glow Wire Test
    • RoHS Directive (EU) on restricted substances in plastic
    • ISO 4589-2: Oxygen Index Testing

    Typical usage ratio

    • 0.5%–4% by weight depending on required flammability rating and resin system; dosage adjusted based on end-use (e.g., electronic casings vs. automotive switches)

    Downstream process integration

    • Direct addition into the polymer melt via twin-screw extrusion; continuous inline monitoring of melt viscosity and additive dispersion; pelletized for downstream injection molding or sheet extrusion lines

    Final product types

    • Electrical enclosures for consumer electronics
    • Automotive interior and exterior modules
    • Connectors and safety relay components
    • Industrial appliance housings

    3. Intermediate in Pharmaceutical API Synthesis

    Pharmaceutical process chemists leverage this phosphate ester as a building block for certain anticholinesterase and CNS-active agents. Its unique functional group allows for selective substitution and ring-closing transformations in multi-step synthesis of organophosphorus pharmaceutical actives. Material enters the process via GMP-controlled transfer, and all conversion reactions undergo validation to comply with ICH Q7 standards. Downstream steps may involve purification by preparative chromatography, followed by micronization, stabilization, and assay confirmation before use in final formulation lines.

    Industry compliance standards

    • ICH Q7A GMP for Active Pharmaceutical Ingredients
    • Ph. Eur. 2.5.15 (European Pharmacopoeia for residual solvents)
    • US FDA 21 CFR 211 for finished pharmaceuticals
    • Japanese Pharmacopoeia (JP) section on organophosphorus compounds

    Typical usage ratio

    • Varies from 3%–12% molar equivalent, adjusted according to target API structure and synthesis scale; increased purity grades required for parenteral or CNS-active APIs

    Downstream process integration

    • Charged into dedicated glass-lined reactor suites during API intermediate construction; reacted in the presence of base or acid catalysts; post-reaction purification to pharmaceutical standards

    Final product types

    • Anticholinesterase active pharmaceutical ingredient crystals
    • Oral and injectable CNS drug formulations
    • Specialty veterinary drug actives
    • Research-grade reference standards for organophosphorus APIs

    4. Chemical Intermediate for Specialty Metal Extractants

    The material functions as a precursor in the production of phosphorus-containing chelating agents used in hydrometallurgical extraction, particularly for rare earths and noble metals. Synthesis specialists incorporate the compound under anhydrous conditions, enabling the production of highly selective extractants through esterification or amination. Strict batch records support full traceability, meeting high-purity demands in mining and refining operations. Extractant solutions produced downstream show high selectivity for targeted metal ions, with performance validated through solvent extraction pilot trials before scale-up.

    Industry compliance standards

    • ISO 9001 Quality Management for chemical intermediates
    • ASTM D4300 for extractant testing in solvent extraction
    • Chinese GB/T 14599-2016 (Hydrometallurgical standards)
    • Occupational health assessments for phosphorus extractant exposure (NIOSH, EU Reach)

    Typical usage ratio

    • Ranges between 8%–16% by weight in initial extractant synthesis, tailored through stoichiometric calculation based on target metal separation requirements and solution phase ratio

    Downstream process integration

    • Fed into high-shear reactors during extractant formation; purification through phase separation and solvent washes; conditioned for field use in counter-current extraction plants

    Final product types

    • Rare earth separations extractant concentrates
    • Gold and platinum group metal organic-phase extractants
    • Custom chelating agent solutions for mining projects
    • Industrial-scale solvent extraction formulations

    5. Modifier in Epoxy Resin Formulation

    Epoxy systems for high-performance coatings and composites benefit from the integration of this phosphorous ester, offering enhanced char formation and mechanical properties. Chemical engineering teams introduce the compound during the pre-polymer stage, ensuring homogeneous wet-out with base resins and curing agents. Advanced rheological control and additive screening guide flat sheet and filament winding producers to meet fire-resistance and structural codes. The resulting cured systems undergo rigorous thermal and physical testing prior to shipment.

    Industry compliance standards

    • ASTM E84 Surface Burning Characteristics of Building Materials
    • ISO 1043-4 for plasticizers in thermoset resins
    • EN 45545-2 Fire Protection on Railway Vehicles
    • REACH SVHC obligations for specialty additives

    Typical usage ratio

    • Between 1%–6% by weight depending on application—higher ratios recommended for construction paneling and composite cladding; reduced levels in applications where mechanical flexibility is critical

    Downstream process integration

    • Metered into epoxy resin prior to final blending and vacuum degassing; distributed via high-shear mixing; formulated for direct application on substrate or reinforcement layup

    Final product types

    • Fire-resistant epoxy coatings for structural steel
    • Composite panels for transportation and infrastructure
    • Industrial flooring with anti-static properties
    • Wind turbine blade and rail car structural elements
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    Certification & Compliance
    More Introduction

    Dimethyl 4-(Methylthio)Phenyl Phosphate: Insights from Manufacturing Experience

    The Role of Dimethyl 4-(Methylthio)Phenyl Phosphate in Modern Chemistry

    From a manufacturer’s perspective, Dimethyl 4-(Methylthio)Phenyl Phosphate has become one of the quiet workhorses in chemical synthesis, especially when the challenge calls for precision and reliability. With demand rising from downstream sectors, the relevance of its specific properties becomes clearer every season. Years of hands-on production have reinforced how critical this compound is, from meeting industrial demand curves for specialty materials to supporting large-scale agricultural chemistry projects.

    Consistent quality doesn’t happen by chance. Only a small fraction of compounds can deliver on stability, reactivity, and targeted application value the way Dimethyl 4-(Methylthio)Phenyl Phosphate can. We’ve shaped every batch under tightly maintained process parameters because we know trace byproduct changes can influence outcomes in downstream use. Handling this material in large production runs presents unique challenges, especially where temperature control and impurity profiles make all the difference.

    Interpreting the Specifications: Why Purity and Consistency Matter

    We maintain high product purity through closely controlled reaction steps. Over decades, we’ve seen the difference a single percent deviation in composition can make in later formulations. For Dimethyl 4-(Methylthio)Phenyl Phosphate, the industry norm typically calls for assay levels above 98%. Deliveries with uncertain composition create headaches not just in performance but across the compliance chain. Our in-house labs rely on gas chromatography and high-performance liquid chromatography for every batch, confirming identity, purity, and tracking potential byproducts such as dimethyl phosphate or residual solvents.

    Even the packaging choices reflect experience learned from countless shipping and storage cycles. A moisture-tight seal extends shelf life and helps avoid hydrolysis, so our storage drums and containers are chosen accordingly. This compound never stands still for long in our warehouse—the best practice is moving it directly to end users to capitalize on optimal activity.

    Understanding Product Differences: Dimethyl 4-(Methylthio)Phenyl Phosphate Compared with Analogues

    Choosing Dimethyl 4-(Methylthio)Phenyl Phosphate over alternatives starts with the sulfur-methyl group on the phenyl ring. That small difference in structure allows for functions others simply can’t match, especially in fine synthesis or as intermediates for custom pesticides and pharmaceutical actives. The methylthio moiety changes electron distribution, influencing both chemical reactivity and biological activity. We manufacture a range of aryl phosphate esters—many of our customers also purchase Dimethyl 4-nitrophenyl phosphate, for instance. The nitro variant comes up frequently where extra oxidative activity is important, but the methylthio derivative stays in high demand for selective biocidal or custom organic synthesis applications.

    Experience with both has shown where one outperforms. Dimethyl 4-nitrophenyl phosphate excels in rapid enzyme assays and quick biotransformations, while the methylthio version holds its own in more specialized applications such as slow-release or targeted reaction pathways. We follow strict in-factory controls to prevent batch contamination between analogues, since cross-contamination, even at low levels, can cost our clients time and money.

    Real-Life Applications and Industry Integration

    Much of the Dimethyl 4-(Methylthio)Phenyl Phosphate we manufacture joins larger-scale synthesis for specialty agrochemicals and pharmaceuticals. Our technical service teams visit customer plants to see products in action. The nuances in handling requirements become clear during these visits. For agrochemical clients looking for a precursor with both selective toxicity and environmental safety, this product offers a performance profile that’s tough to replicate.

    Reliability in downstream processing boils down to trace residuals and batch uniformity—not high-minded targets, but practical factory realities. We run custom pilot batches on occasion, whenever clients push for novel derivatives or formulations. Those cases give us the chance to see firsthand how robust the synthesis is against batch-to-batch variability. Feedback from formulation chemists might lead us to tweak solvent streams or improve the filtration stage, always with the goal of removing the last traces of color bodies or sulfur residuals that could undermine final product quality.

    Another significant application comes with pharmaceutical intermediates, particularly for those scaffolds that hinge on aromatic phosphates bearing sulfur-substituted phenyls. Speed and reproducibility matter most in pilot-scale supply. Only through repeated, closed-loop coordination between technical teams and the production floor do we keep every process detail fine-tuned, from catalyst selection right down to the drying stage.

    Scaling and Production: Experience-Driven Refinements

    Manufacturing Dimethyl 4-(Methylthio)Phenyl Phosphate at scale brings process constraints that simply don’t appear in small-batch labs. As production volume climbs, subtle heat transfer issues or impurity accumulation appear, prompting design tweaks in reactors and purification steps. We have invested in jacketed reactors with precise temperature feedback, pneumatically actuated valves, and continuous in-line monitoring for byproduct formation—all to keep reaction runs consistent and yield above 95% on a routine basis.

    Solvent selection stands out as a key process variable. Chlorinated solvents can provide efficiency during esterification yet come with strict regulatory scrutiny and challenging waste streams. We persistently look for greener alternatives, trialing new polar aprotic solvents as they hit the market. It’s a process of trial and observation—occasionally, a swap results in lower unwanted isomerization or reduced sulfur odor in the output.

    Waste minimization remains at the heart of our modernization program. Side reactions during methylation introduce minute levels of dimethyl sulfate or related compounds, which call for vigilant separation. Our final step purification integrates solvent singulation, nitrogen sparging, and carbon filtration, repeatedly refined over years of troubleshooting bottlenecks. The boost to both environmental performance and bottom-line yield proves the value of this investment.

    Supporting Our Clients: Technical Answers Grounded in Practice

    Clients often ask how Dimethyl 4-(Methylthio)Phenyl Phosphate responds to challenging reaction schemes or how it integrates with other actives in formulations. If your downstream chemistry needs flexibility with strong electron-donating properties on the phenyl phosphate scaffold, this compound keeps synthetic doors open. Our team relies on batch history data and direct analysis of impurity trends to help clients forecast shelf life or reaction predictability.

    Rather than relying solely on standardized datasheets, partners get support from process engineers who have run multi-ton synthesis and observed the subtle changes raw material selection brings. We use real case histories to advise clients considering blends, co-solvents, or whether stabilized or unstabilized versions might better suit a new project. Across applications, ongoing dialogue with end users keeps our attention trained on improvements that remove recurring pain points.

    Sustainability in Chemical Manufacturing

    Chemicals with sulfur in their makeup often come under scrutiny for odors, persistency, or downstream degradation. We’ve taken steps to contain and neutralize sulfur off-gassing both during production and in shipping. Closed system transfer, vapor recovery systems, and regular emissions monitoring have significantly reduced our ecological impact.

    Clients operating in markets with heavy environmental oversight demand documentation showing full traceability from raw input to finished product. Our digital batch tracking and waste manifest records provide the transparency modern logistics chains expect. Partnerships with hazardous waste processors allow us to safely repurpose or neutralize spent solvents and side streams. Chemical safety remains personal—our people live near our factories—and we design safety steps with that in mind.

    Comparing Production Challenges: Dimethyl 4-(Methylthio)Phenyl Phosphate versus Related Esters

    Each aryl phosphate ester we manufacture carves out its own identity during production. Dimethyl 4-(Methylthio)Phenyl Phosphate resists hydrolysis fairly well, especially when compared to its nitro-substituted cousin. That advantage lets us store and ship through a wider temperature range and still guarantee customer satisfaction upon arrival.

    The methylthio group, though, contributes some persistent sulfur notes and can complicate odor management. Our scrubber systems have evolved specifically due to experience with this molecule. We chose enhanced carbon beds and regular pressure-pulse cleaning cycles to keep plant air quality high. These are practical challenges met with practical tools—solutions that emerged naturally through repeated production cycles and hands-on troubleshooting.

    Explosive risk management has been another area where this product forced our team to up its game. Where certain phosphate esters feel more forgiving during mixing and transfer, the methylthio variant’s lower ignition threshold shaped our standard operating procedures. Only experienced handlers use direct transfer lines, static bleed-off, and bonded storage during large run movement. Factory training emphasizes real incidents and the lessons learned, not just theoretical risks.

    Solving Persistent Industry Issues: Collaboration over Generic Answers

    Sometimes partners enter with a textbook expectation of how Dimethyl 4-(Methylthio)Phenyl Phosphate should behave. Theory and full-scale production diverge once actual impurity loads and ambient moisture get involved. We offer tailored pilot runs for complex formulations and new biocidal products so that labs can see actual stability and pigment formation firsthand. Our engineers run on-site troubleshooting in customer facilities, guiding their process adjustments based on direct observation, not just remote advice.

    That same hands-on approach has guided past improvements in reaction quench steps, solvent exchange, and remote monitoring for runaway temperatures. By working shoulder to shoulder with technical teams, we achieve better defect resolution and more robust supply models that everyone downstream appreciates.

    Looking Ahead: Continuous Improvement, Real Challenges

    Dimethyl 4-(Methylthio)Phenyl Phosphate isn’t just a molecule on a catalog sheet. For our business, it means constant innovation, sustained vigilance, and a reliance on factual results over promises. Keeping impurities down, yields up, and storage safe isn’t theoretical — it’s a product of hundreds of batch records, instrumentation logs, and customer feedback sessions.

    We continually mine production analytics for insights. If a particular reactor pair-up leads to a lower residual dimethyl phosphate trend for three quarters straight, that route becomes the new standard for the next run. Teams across scheduling, maintenance, and technical service remain integrated in every campaign, ensuring actual usability for clients.

    Conclusion: Value Shaped by Direct Manufacturing Experience

    Dimethyl 4-(Methylthio)Phenyl Phosphate stands out because its quality hinges on practical, real-world manufacturing know-how. The value we build in each kg of material comes from solving problems before they escalate — through advanced purification, targeted odor management, and real engagement with client challenges. As regulatory requirements tighten and markets move toward more selective chemical use, having years of experience making and handling this compound puts us in a position to both supply present demand and innovate for what’s coming next.

    We keep our doors open to partners seeking solutions, not just shipments. Technical support means more than answering questions — it means involvement in your process and an ongoing push to make each run more efficient and each formulation more stable. The trajectory of Dimethyl 4-(Methylthio)Phenyl Phosphate’s industrial adoption is no mystery to those with hands in the process. The lessons learned in tanks, vats, and on the loading dock remain our most valuable resource for future growth.