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Talking about O,O-Dimethyl-S-[1,2-Bis(Ethoxycarbonyl)Ethyl] Dithiophosphate means looking back at a chapter in organophosphate chemistry that’s quietly run alongside much bigger headlines. This compound’s story began in the mid-20th century, when chemists dug into the world of phosphorus–sulfur bonds with a real sense of possibility. It emerged from research circles looking for better catalysts, more efficient intermediates, and specialty additives. Its evolution tracked along with broader industrial and agricultural chemical advances. Skilled chemists, building on earlier work with thiophosphates, refined its synthesis and saw its potential for practical uses in both laboratories and factories. These kinds of substances didn’t stay locked in academic journals. They started shaping the mix of agrochemical formulations and industrial auxiliaries as regulatory pressure and environmental awareness grew in the last half of the century.
On a shelf, this molecule rarely stands alone. Instead, it forms the backbone of blends and mixtures that drive efficiency or produce targeted effects. Chemical companies prize it as an intermediate for building more complex molecules. It doesn’t show up on retail store shelves and doesn’t have the widespread recognition of some commercial pesticides or industrial plastics. It’s more like the unsung craftsperson behind the scenes, filling roles in specialty synthesis and modification steps. My experience working in applied chemical research shows these compounds emerge in project after project, quietly running the show in everything from controlled-release agricultural inputs to lubricants and specialty coatings. The substance carries several alternate names—most notably under its dithiophosphate descriptors—but chemists in the know reach for it to capture its reliable, repeatable behavior in the lab and the plant.
Those who have handled O,O-Dimethyl-S-[1,2-Bis(Ethoxycarbonyl)Ethyl] Dithiophosphate recall it as a pale yellow liquid, though batches vary. It brings a mild, sulfurous odor—hard to forget once you’ve worked a few syntheses with it. Solubility leans toward nonpolar organic solvents. Its boiling and melting ranges keep it workable at standard lab and industrial conditions. The molecule’s phosphorus-sulfur motif shows a high reactivity with nucleophiles and electrophiles, making it the kind of intermediate that can zig and zag into different reaction pathways. Exothermic behavior sets in after prolonged heating or at elevated temperatures, so careful control matters. Strong oxidizers break it down fast, but stored in sealed glass under nitrogen, it stays stable for months. Handling it without gloves leaves a signature scent lingering long after the workday ends—a small reminder of the reality behind the chemical equation.
In industrial practice, specs come down to purity—often exceeding 95%—and water content, since too much moisture turns reaction controls into guesswork. Container markings tend to reference chemical abstracts numbers and the standard hazard pictograms. Unlike more commoditized chemicals, these labels rarely offer usage instructions since buyers already know what’s inside before ordering. Barcode tracking and batch numbers do show up as traceability now supports greater transparency, something regulators across North America, Europe, and East Asia demand. In the lab, everyone keeps the safety data sheet close at hand, because sometimes the difference between a clean procedure and a costly cleanup—or much worse—comes down to spotting a detail buried in those pages.
Manufacturing O,O-Dimethyl-S-[1,2-Bis(Ethoxycarbonyl)Ethyl] Dithiophosphate calls for a careful choreography of reaction sequences. It typically begins by reacting dimethyl dithiophosphoric acid with a diester derivative containing the 1,2-bis(ethoxycarbonyl)ethyl backbone. Sulfurization steps require controlled temperatures to avoid unwanted byproducts, and the addition sequence can make or break yield. I’ve watched scale-up processes where a misjudged cooling rate led to runaway side reactions, emphasizing the practical importance of pilot-scale runs before commercial production. Vacuum distillation, sometimes followed by liquid–liquid extraction, handles the last span of purification. The final product ends up dried and bottled under inert atmosphere, ready for use or resale to downstream partners.
If you ask an organic chemist about this molecule, they usually point to its use as a versatile intermediate. It reacts cleanly with various nucleophiles, forming thioesters and other P–S containing compounds. Electrophilic substitutions exploit the methyl groups, while the dithiophosphate backbone offers multiple functionalization options. I’ve seen it used in both lab-scale synthesis and larger process chemistry for modifying amines and alcohols. These modifications help craft custom surfactants or tune the reactivity of metal-based complexes, opening up new material properties. In organophosphate research, the opportunity to tweak reaction conditions and build entirely novel molecules around the core scaffold keeps drawing both academic and industrial chemists back to its bench.
Naming conventions zigzag through IUPAC quirks and industry shorthand. Besides the full systematic moniker, chemists sometimes call it “dithiophosphoric acid O,O-dimethyl ester, S-ester with 1,2-bis(ethoxycarbonyl)ethanol.” Synonyms may drift as projects move across borders—European researchers often use alternate abbreviations common within the REACH regulatory databases, while Asian manufacturers fold its identity into proprietary product lines. This tangled web of names sometimes frustrates cross-border collaborations, but shared structural diagrams bridge the gap. Anyone who’s spent time in research procurement knows to triple-check before pulling the trigger on an expensive specialty order.
No editorial on a dithiophosphate would be honest without mentioning risks. The organophosphate backbone raises flags due to links with enzyme inhibition—in particular, the cholinesterase mechanism that gave older insecticides such a toxic punch. In real-world settings, exposure comes mostly during transfers and bench-scale handling. Skin and respiratory exposure represent the big hazards, and each chemist develops a sixth sense for vapor and splatter control. Safety goggles, nitrile gloves, and an efficient fume hood form the daily uniform. Spills leave a stubborn residue, and cleanup often demands more patience than the synthesis. Long-term worker health ties into routine air monitoring and proper chemical hygiene, reinforced by incident reports and hard-won lessons from decades of use.
Most applications stay behind the curtain of trademarked blends or proprietary formulations. I’ve seen this chemical at the center of research into new lubricant additives where sulfur and phosphorus help limit metal-to-metal wear. In agriculture, it’s popped up as a structural element in experimental slow-release fertilizers, giving plants a measured nutrient boost while reducing leaching. Laboratories value it for high-yield heterocycle synthesis, particularly when building complex organic frameworks. Its presence echoes through patent filings and conference talks, a testament to its value as a flexible piece of the synthetic toolkit. Now and then, development chemists stumble across new use cases, bringing old molecules into new contexts by tweaking functional groups for emerging needs.
A deeper dive into the toxicology sparks debate and regulatory scrutiny. Animal studies track enzyme disruption, with acute effects noted at relatively low doses compared to bigger industrial chemicals. Chronic exposure tests in rodents reveal organ and neurological effects, driving regulatory agencies to recommend strict workplace limits and extensive monitoring. Research groups keep looking for green chemistry alternatives that retain reactivity but ditch the persistent environmental hazards. Some labs focus on tweaking the parent structure to break down faster in soil or water, hoping for safer, more sustainable industrial and agricultural use. Collaborations between public health experts and industry hope to tie real-world handling data with better biomarker tracking in case of accidental dosing.
The road ahead splits between refining old strengths and solving persistent problems. As sustainability and green chemistry gather steam in the sector, researchers look for new ways to recover, recycle, or safely degrade compounds like O,O-Dimethyl-S-[1,2-Bis(Ethoxycarbonyl)Ethyl] Dithiophosphate. There’s no substitute yet for its precise reactivity in organophosphorus synthesis, but molecular designers chip away at crafting alternatives from safer building blocks. Expanded research into biodegradable analogs could someday sideline many dithiophosphates if they match performance at the right price. Collaboration across regulatory, industrial, and academic circles means progress inches forward—balancing legacy utility against real human and environmental costs. The chemical’s fate, like many specialty agents, ties to this changing conversation about risk, performance, and responsibility in a world rightly demanding better answers from the chemical industry.
O,O-Dimethyl-S-[1,2-Bis(Ethoxycarbonyl)Ethyl] dithiophosphate is a mouthful, but its job in the world goes right into chemistry's more practical corners. You find this compound parked in the toolkits of both industrial chemists and manufacturers. Its chemistry falls under the dithiophosphate group—chemicals famous for their versatile help in making other products work better, safer, or cleaner.
Farmers and gardeners, believe it or not, depend on the results of this compound. Manufacturers use it as a building block in pesticides and fungicides, which keep crops from rotting or falling victim to insects or fungus. This isn’t just about profit—it’s about food on plates. According to the Food and Agriculture Organization, crop losses due to diseases account for up to 16% of global production each year, and some of this loss is preventable with targeted chemical solutions.
Besides fieldwork, the same compound steps into the world of lubricants as an important additive. Here, it works like a shield, helping oils protect engines and heavy equipment from rust, breakdown, and general wear. Good lubricants mean those thousand-dollar tractors or factory robots don’t die young. Industrial machinery running twenty-four hours a day won’t make it far if heat and friction keep grinding away their innards. Scientists at the Society of Tribologists and Lubrication Engineers point out that even a few percent performance gain in industrial lubricants saves entire companies millions of dollars a year—less downtime, fewer repairs, and better fuel efficiency.
The usefulness of this chemical doesn’t excuse recklessness. Dithiophosphates, like many strong chemistry tools, come with their batch of risks. Improper handling or overuse can put workers in danger, pollute water, or build up in soil where tomorrow’s crops will struggle. Data from the U.S. Environmental Protection Agency shows that even small traces of phosphorus-based compounds can trigger long-term environmental headaches, stressing fish populations and trickling into drinking water.
Regulation and good science step in here. Safety protocols mean donning gloves, masks, and using proper ventilation—plus, regular training for staff. But choosing better waste treatment and investing in new, cleaner substitutes or production methods is where real progress happens. Some labs now work on limiting the amount of this compound needed per product batch, or finding biodegradable options that break down harmlessly post-use.
More and more, industry pushes for sustainability in every part of the chain. Chemists experiment with biosynthesized alternatives that can do the same job with a lighter footprint on air, soil, and water. Government grants flow into research about recycling and reprocessing spent chemicals, so nothing valuable leaks into rivers or ends up under our feet for decades.
This approach isn’t just for optics or marketing. Real-world change—less pollution, better health outcomes for workers, and safer drinking water—rests on how well industries move past chemicals that worked in the last century, and into ones that match the priorities of today.
Learning from industrial history means balancing function and responsibility. O,O-Dimethyl-S-[1,2-Bis(Ethoxycarbonyl)Ethyl] dithiophosphate represents both the strengths and the headaches that modern chemistry brings into daily life. It’s up to scientists, engineers, and regulators to steer its use toward safety and sustainability. That’s the only way industry and environment both come out ahead.
Working with hazardous chemicals isn’t a guessing game. Even before cracking open a bottle or bag in a lab or on a shop floor, most people have run into stories about accidents that start with an overlooked step—or a rushed process. A splash can burn skin. Fumes can strike before a person realizes. I recall during my undergraduate days how a small lapse flooded a classroom with ammonia fumes—fast reminders about the real risks behind routine tasks.
Eye protection tops the list for good reason. One drop of acid or splatter from a caustic base changes someone’s entire week, if not their vision for life. Not even the most basic solutions—like vinegar or bleach—should go near an uncovered face. Gloves, especially those rated for chemical resistance, protect hands that always seem to end up where they shouldn’t. Aprons and full lab coats go further in blocking spills that will soak through cotton shirts in seconds.
I’ve worked in rooms where a sour, hint of vapor crept up because someone skipped the fume hood. Even low concentrations build up, causing headaches or worse. Proper ventilation, whether a fume hood or a simple exhaust fan, pulls toxic vapors away from lungs and eyes. People sometimes forget that gases can settle in low or enclosed spaces—leading to problems for anyone doing routine cleaning or working late.
Labeling feels tedious until the day a clear bottle gets mistaken for water and poured into the wrong container. Maybe it’s phenol, maybe it’s an aggressive solvent—there’s a reason labels must be legible, current, and specific. Storing incompatible chemicals together leads to accidents that spark fires or release toxic clouds. I’ve seen the aftermath of a small shelf collapse where bleach and acid bottles cracked open together; that’s a fast lesson about proper chemical segregation, secondary containment, and daily checks.
Emergency showers and eyewash stations should never be hidden behind clutter. Quick access matters more than most folks expect—I remember a situation where someone dithered a minute, and the burn kept spreading. Fire extinguishers, spill kits, and updated emergency contact information must be more than wall decorations. Training doesn’t mean anything if a person can’t locate the equipment quickly under stress.
Solid knowledge beats improvisation every time. Nearly all chemical incidents I’ve seen stem from shortcuts or a lack of basic training. Regular safety drills remind teams where to walk, what to wear, and which reactions carry extra risk. Most facilities update safety data sheets, but keeping them accessible matters—a binder deep in a drawer may as well not exist. Digital access helps, but only if everyone knows how to use it.
Complacency causes nearly as many problems as ignorance. Even if a process seems routine, small errors—diluting the wrong way, wiping an unknown spill with bare hands—can have real consequences. Peer checks, posted reminders, and a culture that rewards slow, careful work save untold hours and injuries. Sometimes, just seeing someone double-check a bottle or glove triggers others to rethink their own steps.
Simple habits, real awareness, and honest respect for the power of chemistry protect lives every day. No fancy words—just prevention, every time, with no shortcuts.O,O-Dimethyl-S-[1,2-Bis(Ethoxycarbonyl)Ethyl] Dithiophosphate isn’t a household chemical. It’s used in specialized industrial processes, so you’re not going to find it next to window cleaner in the store. That alone tells you this compound demands more care and attention than the average jug of bleach. People think of chemical safety as something for the textbooks, but workplace stories don’t lie—cutting corners can cost you in property, health, and reputation. I remember a case at an agrochemical plant years ago. Staff skipped over basic storage rules, and the warehouse manager paid with severe burns. Following good guidance on chemicals isn’t about being uptight; it keeps people safe and protects years of effort.
This chemical isn’t inert. Triple-check the materials safety datasheet and you’ll see words jumping out: flammable, reactive, toxic on contact. Many organophosphates, especially those with sulfur groups, release fumes and react with heat or water. I’ve seen leaks in storerooms, and clean-up is never as simple as spraying Lysol and calling it a day. These leaks can contaminate the air quickly or even spread to drainage, causing environmental headaches and expensive remediation.
Solid plans start with temperature. Don’t let this compound bake in the sun or freeze. Anything above normal room temperature risks breaking its bonds, which could mean fires or dangerous gases. My old supervisor used to carry a pocket thermometer strictly for the chem storage rooms. Shooting for 15-25°C keeps the substance stable and extends its life.
Humidity creeps up as another enemy. Moisture can turn O,O-Dimethyl-S-[1,2-Bis(Ethoxycarbonyl)Ethyl] Dithiophosphate unstable, sparking chemical changes nobody wants. Keep containers shut tight in low-humidity rooms. If you walk into a storeroom and the air feels swampy, that’s a weak link. More than one production line has been lost for weeks because humidity ruined a shipment.
Choose the container with guts to match the compound. Use only containers recommended by the manufacturer—usually HDPE or lined steel—and replace them every few years, even if they appear undamaged. Leaky seals and busted threads seem harmless until you catch a whiff you can’t explain.
Space matters: Keep it on a shelf or secondary containment tray, never on the ground. Spills roll downhill, and chemical puddles spread further than you think. I spent plenty of late nights chasing drips under shelving after careless stacking.
Label every drum, can, or bottle clearly and update each tag when new warnings come out. In a crisis, you can’t afford to guess what's inside. People I know keep laminated emergency cards posted nearby with the main risks and response steps in simple language.
Security isn’t about locks on doors. Never store dithiophosphate near strong bases, acids, or oxidizers. An accidental mix-up can trigger explosions or corrosive gas. At one job, our cross-check list on every delivery saved us more than once. Don’t let complacency set in; review chemical compatibility charts every six months.
No system works without regular training. Bring new workers up to speed fast, and run refresher sessions at least twice a year. Role-play emergencies. People remember what they practice, especially when nerves are high. Make sure everyone who could ever touch the storage area has personal protective equipment on hand and knows where to find the eye-wash and spill kits.
Once a month, walk through storage areas with a checklist, not just a quick glance. Replace labels, sweep up residue, and keep an inventory log that matches the physical stock. If a number feels off, stop and figure out why before you close up.
High-risk chemicals bring high stakes. The price of proper storage never outweighs the costs from an incident. I’ve watched teams lose months and tens of thousands of dollars to one overlooked bottle. Following tough but clear storage routines shows respect for people, property, and the years of science that made these chemicals useful in the first place.
People buy products with active ingredients promising results or safety, but many don’t know what actually makes those claims possible. The chemical structure holds the real story behind how something works, why it’s safe, or where it might cause problems. Back in high school chemistry, I learned to respect formulas not just as diagrams on a page but as blueprints with major implications. Years later, I worked in a lab testing common everyday items, and finding out exactly what sat beneath fancy marketing changed the way I looked at those items forever.
Everything has a formula—paracetamol, caffeine, even the plastic casing around your phone. Chemical structure doesn’t just show a series of letters and numbers. It reveals the building blocks, the arrangement that leads to certain behaviors. Caffeine (C8H10N4O2) stimulates because of the way its nitrogen atoms connect. Paracetamol’s structure allows it to block pain but not irritate the stomach the same way aspirin sometimes does.
If you’re someone concerned about safety, knowing what’s in a cleaning spray or face cream isn’t just trivia. Allergies, health risks, and even environmental impact—none stay hidden once you have the formula in front of you. Researchers and public health workers use this kind of knowledge every day to trace problems, recall dangerous products, or stop bad actors from sneaking in banned ingredients under alias names.
Chemicals don’t act in isolation. Two harmless-looking molecules, combined, sometimes create a compound you don’t want near your food or skin. There’s a story of a friend who used a hair straightener with a certain well-known brand, only to end up in the emergency room with breathing troubles. A closer look revealed complex formaldehyde donors—caught only because someone double-checked the chemical structure. Brands without transparency hide behind “proprietary formulas”—an excuse that doesn’t fly with consumers who demand honesty.
A recognizable name on the package isn’t enough. People want the full formula, maybe not to memorize, but at least so independent groups can check it. Countries like those in the EU demand publicly available safety data sheets and require ingredients to show up on packaging. In the US, pressure from advocates has brought about greater transparency, especially for chemical sunscreens and food additives.
Access to a chemical formula gives power. Parents checking for allergens, those with chemical sensitivities, and even gardeners watching out for dangerous pesticides—everybody benefits. Groups like the Environmental Working Group use accessible chemistry to give non-scientists a clear look into what they buy. I’ve known families who avoid foods with too many unpronounceable compounds, and they say it’s a stress reliever knowing the risks ahead of time.
Manufacturers can play a stronger role. Share the formulas, fund outreach to help people understand them, and back policies that hold everyone to the same safety standard. Scientists and educators keep working to demystify these codes and teach communities how molecular structure affects everything from safety to sustainability. When more people care about the structure behind the product, safer and smarter choices get easier for everyone.
Information or lack of transparency can make it tough to keep up with every risk tied to new chemicals. Imagining a product’s harmlessness just because it sits in our homes or gets touted in ads misleads us all. I grew up using cleaning products with mysterious names on the label. Years later, studies flagged some as respiratory irritants. Nobody had warned us.
Chemical companies often produce novel synthetics, but proper long-term data lags. PFAS, for example, entered consumer use in nonstick pans, raincoats, and even food packaging. Only after decades did researchers prove PFAS stick around in water, soil, and people’s blood. Chronic exposure connects to some cancers and immune system troubles. Recalling how my aunt’s town ran a bottled water program after PFAS tainted wells made the risks very real.
Another lesson comes from pesticides like DDT. Over years, they poisoned birds and caused thin eggshells. Rachel Carson raised the alarm in "Silent Spring." Listening to older neighbors talk about how bird numbers dropped back then drove home the message that ignoring early warning signs harms both wildlife and future generations.
Chemical exposure rarely announces itself. Acute reactions, like rashes after touching certain glues or headaches from volatile cleaning sprays, serve as warnings. Yet, many effects—from hormone disruption to asthma, or worse—take years to appear. I once lived in an apartment where peel-and-stick flooring gave off formaldehyde. Constant coughing and eye irritation vanished once we moved out, confirming what others experience in poor indoor air quality settings.
Workplace exposure risk runs high for those in laboratories or factories. Personal protective equipment, ventilation, and rigorous handling reduce incidents, but not everyone gets training, especially in small businesses. Workers told me about jobs with daily headaches, only discovering links to solvents long after quitting.
Regulators do push for better hazard labeling, but enforcement varies. I trust independent consumer advocacy groups more than manufacturers’ promises, because industries sometimes minimize downsides or fight tougher standards. The experience of reading “safe if used as directed” on a product, only to discover it lingers in dust or water, makes trust harder to earn.
Safe disposal creates headaches, too. Household hazardous waste collection days fill up fast in my area—proof that plenty of people care, but also that many chemicals outlast their intended use. Flushing compounds or tossing them out risks contaminating water systems.
Shifting industry focus toward non-toxic alternatives demands both public attention and government pressure. We could start by funding green chemistry research and giving businesses incentives to substitute safer materials. Schools can teach kids the basics of chemical safety, helping the next generation spot risks early. On the community level, supporting research and demanding open ingredient lists keeps pressure on manufacturers. Scientists recommend regular reevaluation of compounds already on the market as more evidence becomes available—a smart, ongoing job.
Cleaner, safer alternatives are not just luxuries. They cut long-term health costs and reduce damage to ecosystems. Each of us can help by voting, signing petitions, and buying from companies that share full information. Experience—both lived and learned—shows that pressing for answers and accountability brings much better results than trusting a label at face value.
| Names | |
| Preferred IUPAC name | O,O-dimethyl-S-[2-(ethoxycarbonyl)ethyl](ethoxycarbonyl)methanethioatephosphorothioate |
| Other names |
dimethoate Cygon Dimet Phosdrin Perfektion Roxion |
| Pronunciation | /ˌoʊ oʊ daɪˈmɛθəl ɛs waɪ tuː baɪs ˌiːˌθɒksiˈkɑːrbənɪl ˈiːθəl daɪˌθaɪoʊfəˈsfeɪt/ |
| Identifiers | |
| CAS Number | 18035-73-7 |
| 3D model (JSmol) | `OCCOC(=O)C(C(=O)OCC)SP(=S)(OC)OC` |
| Beilstein Reference | 1577630 |
| ChEBI | CHEBI:38645 |
| ChEMBL | CHEMBL2008903 |
| ChemSpider | 59312780 |
| DrugBank | DB01556 |
| ECHA InfoCard | 03d67dcf-4da7-44fd-afd9-73f157be9437 |
| EC Number | 262-690-5 |
| Gmelin Reference | 1418961 |
| KEGG | C19609 |
| MeSH | D008083 |
| PubChem CID | 859395 |
| RTECS number | TC8750000 |
| UNII | C6TW4G6E9M |
| UN number | UN3108 |
| CompTox Dashboard (EPA) | DTXSID4042519 |
| Properties | |
| Chemical formula | C10H19O6PS2 |
| Molar mass | 378.43 g/mol |
| Appearance | Colorless to yellow liquid |
| Odor | Odorless |
| Density | 1.23 g/cm³ |
| Solubility in water | Insoluble in water |
| log P | 2.13 |
| Vapor pressure | 1.72E-05 mmHg at 25°C |
| Acidity (pKa) | 1.62 |
| Basicity (pKb) | 1.53 |
| Magnetic susceptibility (χ) | -75.99 × 10⁻⁶ cm³/mol |
| Refractive index (nD) | 1.486 |
| Viscosity | Viscosity: 2.33 mPa·s (20 °C) |
| Dipole moment | 4.75 D |
| Thermochemistry | |
| Std molar entropy (S⦵298) | 510.6 J·mol⁻¹·K⁻¹ |
| Std enthalpy of formation (ΔfH⦵298) | -1089.7 kJ/mol |
| Std enthalpy of combustion (ΔcH⦵298) | -1468.1 kJ/mol |
| Pharmacology | |
| ATC code | S01XA20 |
| Hazards | |
| Main hazards | Harmful if swallowed. Causes skin irritation. Causes serious eye irritation. May cause respiratory irritation. |
| GHS labelling | GHS07, GHS09 |
| Pictograms | GHS07 |
| Signal word | Warning |
| Hazard statements | H302, H315, H319, H335 |
| Precautionary statements | P261, P264, P270, P271, P272, P273, P280, P302+P352, P308+P313, P312, P321, P363, P405, P501 |
| NFPA 704 (fire diamond) | 2-1-0 |
| Flash point | > 113 °C |
| Autoignition temperature | Autoignition temperature: 410°C |
| Lethal dose or concentration | LD50 oral rat 2480 mg/kg |
| LD50 (median dose) | 945 mg/kg (rat) |
| NIOSH | NA9064000 |
| REL (Recommended) | Not established |
| IDLH (Immediate danger) | Not established |
| Related compounds | |
| Related compounds |
O,O-Dimethyl dithiophosphate O,O-Diethyl dithiophosphate O,O-Dimethyl-S-ethyl dithiophosphate O,O-Dimethyl-S-methyl dithiophosphate O,O-Dimethyl-S-(2-ethoxycarbonylethyl) dithiophosphate |
