| HS Code | 776553 |
| Chemical Name | O,O-Dimethyl-S-(2,3-Dihydro-5-Methoxy-2-Oxo-1,3,4-Thiadiazol-3-Ylmethyl) Dithiophosphate |
| Cas Number | 950-37-8 |
| Molecular Formula | C7H13N2O5PS3 |
| Molecular Weight | 348.36 g/mol |
| Appearance | Colorless to pale yellow liquid |
| Odor | Slight characteristic odor |
| Solubility | Soluble in organic solvents, limited solubility in water |
| Boiling Point | Decomposes before boiling |
| Density | 1.37 g/cm³ at 20°C |
| Storage Conditions | Store in a cool, dry, well-ventilated area away from direct sunlight |
| Stability | Stable under recommended storage conditions, decomposes upon heating |
| Use Category | Organophosphorus pesticide intermediate |
| Synonyms | Methidathion intermediate, Dithiophosphoric acid derivative |
As an accredited O,O-Dimethyl-S-(2,3-Dihydro-5-Methoxy-2-Oxo-1,3,4-Thiadiazol-3-Ylmethyl) Dithiophosphate factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | The chemical is supplied in a 500g amber glass bottle, featuring a tightly sealed screw cap with hazard and handling labels affixed. |
| Shipping | The chemical O,O-Dimethyl-S-(2,3-Dihydro-5-Methoxy-2-Oxo-1,3,4-Thiadiazol-3-Ylmethyl) Dithiophosphate should be shipped in tightly sealed containers, labeled according to hazardous material regulations. Transport at ambient temperature, away from moisture, heat, and incompatible substances. Ensure compliance with local, national, and international chemical shipping guidelines for safe handling and delivery. |
| Storage | Store **O,O-Dimethyl-S-(2,3-dihydro-5-methoxy-2-oxo-1,3,4-thiadiazol-3-ylmethyl) dithiophosphate** in a cool, dry, well-ventilated area away from incompatible substances such as oxidizers. Keep the container tightly closed and clearly labeled. Avoid exposure to direct sunlight, heat, and moisture. Use appropriate secondary containment to prevent environmental release in case of leaks or spills. |
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Working with O,O-Dimethyl-S-(2,3-Dihydro-5-Methoxy-2-Oxo-1,3,4-Thiadiazol-3-Ylmethyl) Dithiophosphate, we know the challenges and potential of making specialty organophosphates. The process involves not only precise reaction times and temperatures but strict raw material checks, with every batch built on years of measured adjustments and hands-on inspection. We don’t look at the molecule as just another formula on a page — every flask we fill, every filter cake we dry, has a story rooted in chemists’ efforts to keep impurities from interfering and to push yield where it can perform in real-world applications.
Our primary model from the last production upgrades carries the code DM-5MTD3. This refers to the compound with the full bridge of thiazolidine-thiadiazole and dithiophosphate groups, anchored by specific methylation at the oxygen atoms. No batch ships without confirmation by both HPLC and NMR analysis — there’s nothing worse than a trace contaminant compromising a process downstream.
Every kilogram that leaves the line comes from a continuous process, where each stage — methylation, cyclization, sulfurization — has been refined for reproducibility. Moisture content sits in the low single digits, thanks to labor-intensive vacuum drying, not just for technical bragging rights but to avoid the hydrolysis headaches many in downstream synthesis report when handled by less careful vendors. Color and odor control matter too, since off-spec lots quickly show up in delayed or inconsistent results at the end-user’s formulation stage.
In any conversation about O,O-Dimethyl-S-(2,3-Dihydro-5-Methoxy-2-Oxo-1,3,4-Thiadiazol-3-Ylmethyl) Dithiophosphate, the head-nodding familiarity among chemists comes from years of running similar structures. Yet not all organothiophosphates behave the same. Our engineers remember before we tuned up the reactor jacket duties, just how often unreacted O-methyl chlorides and side-chain cracks would pop up in final lots. That bitter lesson cost us time redoing batches, which no processor wants when a client’s production line is idled waiting to qualify a new supplier.
Molecular variation makes a difference. We’ve tracked how different grades of phosphorus pentasulfide shift impurity profiles, and how minor tweaks in oxadiazole temperature ramp impact yield by several percent. At first, it takes trial and error, but tenacity and careful recordkeeping reveal pathways to far cleaner product — strong enough for the most finicky chemical synthesis chains or agricultural intermediates.
The design of this product helps bridge numerous applications in organophosphorus chemistry, especially where strong nucleophilic reactivity is required with minimized byproduct formation. Workers at the plant floor have tested pH stability across broad ranges and watched how the thiadiazole ring offers greater hydrolytic resistance compared with more basic dithiophosphate forms.
Users come back with feedback every month, so we track which characteristics seem to matter most outside the lab bench. For some, the choice comes down to consistency — using the same source every quarter lets formulation chemists cut down on batch QC time. Others need compounds that bring greater selectivity when targeting certain metal ions, or chemical scaffolds for further derivatization. There’s a reason our batches land in pilot lines and full-scale plants, not just test tubes: both researchers and industrial buyers want fewer headaches.
Some clients in crop protection prefer this exact molecule for precursor synthesis, building more advanced actives on its scaffold. Others in specialty lubricants have used it as an extreme-pressure additive, pointing to unique sulfur content balancing wear resistance with oxidation control. We’ve had methodical friction tests come back showing better longevity compared with prior dithiophosphate additives. The molecule’s structure also lends itself to metalworking formulations where phosphate functionality and thiadiazole’s stability outperform simpler alkyl dithiophosphates, especially in environments prone to thermal degradation.
Talking shop with R&D chemists, we hear they need repeatable, clean functional groups for stepwise organic synthesis. Too much side reaction or crosslinking and yields can fall off a cliff. Our teams learned the hard way by running pilot-scale condensing reactions — temperature, solvent polarity, and reaction time all matter substantially. We offer this insight with every technical package so end users make fewer missteps scaling up.
Anyone can source chemicals, but not all get deep into the weeds with consistency. Some competitors ship variable lots, with more color, off-odors, or unexpected byproducts. We keep our process semi-automated, so instead of chasing output at any cost, production supervisors double-check active ingredient content and impurity fingerprints for every drum. As a result, our batches start with close analytical profiles and stay that way — no surprises across orders, which matters for any formulator tired of drifting titration results. We don’t just send out a spec sheet; we share full analytical data, batch history, and even the issues we catch in-house so customers arrive armed with the same facts.
From the beginning, we chose grade-specific glass lining for reactors, not stainless steel, based on corrosion data from aggressive sulfur species. This cut down on trace iron contamination, which we heard from customers would gum up catalysts or darken formulations. Plant mechanics do regular preventive maintenance targeting jacket leaks and gasket fatigue, after earlier staff caught a slow degradation problem in a now-defunct batch. No system is perfect, but direct material feedback loops keep us learning and responding fast — not just reading a supplier complaint and forwarding it onward. We bring our technicians face-to-face with what went right and what failed, so the next run is better.
Input materials come from a limited set of verified partners, not unknown brokers or regional resellers. During a raw material crunch a few years ago, we held back shipments, took the heat from buyers, but never chose substandard input chemicals. The short-term pain helped avoid costly end-user recalls. Every engineer here has seen how “cheap input, expensive headache” often plays out in specialty chemistry, and we don’t want customers to go through that.
It’s easy to talk purity and performance, but the bulk of our training and attention is spent on safety and safe handling. This compound, like most organothiophosphates, commands respect in handling. Site staff run closed-loop transfers and double-check for skin contact, especially since we’ve learned over decades that personal protective equipment, strong ventilation, and routine area cleanups make the difference in long-term worker health. We routinely rotate staff job stations to minimize cumulative exposure. Technical support urges caution, especially in new applications, and not just because regulations require it, but because we see the outcomes when protocols fall short.
Higher-purity lots generate less low-level vapors, but users still need a keen nose and set of gloves available. Each shipment comes with guidance honed by field experience, not just boilerplate. Our old hands can spot off-spec from smell alone, though we don’t skip GC/MS or titration backstops. This practice means we catch minor problems early — before they leave the site, not in a downstream recall. We believe that knowledge shared with users builds trust and keeps doors open longer than big marketing claims or tech jargon.
Strong product claims don’t mean much unless a team can back them up with hands-on fixes. In a batch from two autumns ago, we spotted a yield drop during the sulfurization stage. After a messy troubleshooting process, some careful pressure checks, and not a little frustration, we found incomplete mixing in a side loop. Many plants would have shipped the consignment for blending to mask the variance, but our supervisors and QAs voted to reprocess. The pain paid off: a week later, repeat runs held higher yields and less odor, with two customers calling it out as a plus. Internal debate is healthy when science comes first, not just shipping deadlines.
Another example came from a customer whose blend needed extremely low free-methanol content. After lab scale checks, we altered our vacuum-strip schedule and swapped a glass still insert for extra protection. It meant revalidating a whole process step, but the improvement meant fewer solvent compliance worries all down the line. We learned to listen early to technical queries — usually, a small change at the start avoids bigger headaches and rework later.
In pesticide intermediate supply, one of our largest contracts demanded a predictable reactivity index for kinetic modeling. Our batch analyses helped model the blend behavior, so waste streams dropped by nearly 15% compared to legacy compounds. Getting feedback from those end-processes lets us keep refining, drop by drop and run by run.
Chemists and engineers here have spent years figuring out wrinkles in real-world application. Sometimes, downstream users expect pure theoretical chemistry to play out without a hitch. Our experience reminds us that formulation space has a way of exposing any weak link in the supply chain. One multinational asked why fermentation yields dipped whenever the raw chemical from a previous producer rolled in. Together, we popped the hood and found a trace byproduct tied to poor separation in upstream synthesis. We adjusted our crystallization kinetics, bringing the impurity below detection limits — and the complaints vanished. We’ve kept a copy of that old batch record just to recall what it took to make a long-term customer happy.
Field support sometimes means tackling storage questions too. Some warehouses, in high humidity, cause product caking or slow polymerization. Rather than shuffling blame or pushing more desiccant, we tweaked the particle size and coated final samples for better stability. Those practical tweaks, not pure theoretical spec writing, separate reliable producers from interchangeable trading houses.
Another round of troubleshooting came with a client running sensitive high-throughput screening for advanced materials. Their early feedback called out trace yellowing and inconsistent spectral lines. Plant chemists partnered directly with their team, running parallel analysis across both labs — after a few tense weeks, changes to purification (including an extra carbon filtration and longer column residence time) produced a clean, colorless product load. Collaborative, two-way troubleshooting drove better results than finger-pointing ever would. This attitude spills over into every improvement project the team here approves.
Buyers in specialty chemicals want reliable sourcing above all. The world is full of similar dithiophosphates, but small details — moisture, purity, color, and trace byproducts — dictate success or frustration for users. For us, the main competitor isn’t another producer, but the temptation to cut costs and risk product drift. We hear from multinational customers who switched after their line halted due to contamination from bargain batches. Once the urgency passes, most prefer steady pricing and fewer disruptions, rather than lowest cost at all times.
In renewables and advanced materials, the feedback keeps highlighting product lifetime, compatibility, and data transparency. Our technical teams don’t just ship — they follow up, offer run notes, and share problem-solving insight. Working directly with production, they know what works and what needs a new approach. Documentation doesn’t end in a filing drawer: we treat it as a living resource supporting each next project. Often, a customer’s new R&D program builds right on last year’s technical notes.
Not all dithiophosphates act alike. Standard O,O-dimethyl dithiophosphates offer base-level reactivity and chelating ability. The addition of the 2,3-dihydro-5-methoxy-2-oxo-1,3,4-thiadiazol-3-ylmethyl group pushes performance on several axes. Hydrolytic resistance stands out first. Years running elevated storage trials show this molecule resists breakdown better than simple alkyl dithiophosphates, translating to fewer issues in shelf life testing and field stock rotation.
Thermal stability also steps up a notch. Customers in lubricants and specialty fluids run extended high-temperature tests, looking for less breakdown and gum formation. Repeatedly, batches from this product hold up under stress and fail fewer mechanical tests than earlier generations of similar products. The unique ring structure adds functional sites for further derivatization — another plus for R&D teams seeking to build more advanced molecules.
Comparing toxicity and regulatory footprint, our plant labs keep tracking impurity levels, helping downstream users avoid bottlenecks during environmental reviews. While no specialty chemical is perfectly benign, cleaner impurity profiles reduce the chance of unexpected complications. Tracking solvent residuals and batch homogeneity keeps our product within the aims of strict regulatory programs. The experience in daily manufacturing brings more trust from end-users aiming to limit their compliance risk exposure.
End performance tests, including wear resistance in tribological studies and reactivity in sulfur transfer reactions, show the molecular design beats many generic options. End-users who have switched for stability or higher selectivity point to improved run times, higher yields, and less equipment fouling. That kind of delta saves cost in the long run and fits what most process chemists actually need — not just a spec line on a certificate.
We know some buyers expect supplier relationships to end at the bill of lading. Yet in specialty chemistry, lasting results hinge on real dialog — not lip service. Anyone can copy a product spec, but it takes more work to track performance, handle emergencies, or support an unplanned process change. Our way means direct chemist-to-chemist answers, not just a customer service reply. Site visits, troubleshooting calls, and product improvement projects help make what we ship better for everyone involved.
If there’s ever a deviation, it’s reported up front. Nobody enjoys surprises, not production planners and definitely not regulatory teams. We track every step in our process and keep open documentation available. Shared knowledge helps customers adapt, whether it’s about reaction profile, storage life, or shipping quirks. No one wins alone; breakthroughs come from shared experience as much as individual innovation.
Many producers in this field come and go, chasing margin and volume. We work squarely with buyers willing to talk through problems, document solutions, and improve processes together. Standing by every batch produced builds loyalty and insight. Whether a researcher calls for a technical tweak or a plant manager flags a minor shipping issue, listening and responding improve our own practices and help the entire industry.
Real innovation takes shared goals, clear feedback, and willingness to admit mistakes. Our own lab failures and production line hiccups taught us the value of learning from setbacks. Open dialog, transparent records, and direct engagement set our team apart. In a crowded market for dithiophosphates, those qualities prove more important than the lowest price — and contribute the most to long-term customer gains.
We approach each new batch as an opportunity to apply lessons learned. From the analytic chemists checking titrations to the mechanics fine-tuning pumps, each improvement builds greater confidence in the product. Our goal isn’t to chase headlines, but to deliver repeatable, high-quality chemical tools for the next generation of process innovators. This approach rewards everyone: safer sites, more reliable field performance, less process waste, and stronger working partnerships up and down the value chain.
O,O-Dimethyl-S-(2,3-Dihydro-5-Methoxy-2-Oxo-1,3,4-Thiadiazol-3-Ylmethyl) Dithiophosphate stands out for chemists and process engineers who’ve experienced the frustration of inconsistent feeds or challenging downstream troubleshooting. Honest answers, repeatable quality, and an eye for shared advancement define what we do — and why end-users keep returning, not just for chemical supply, but for practical partnership.