© 2026 Sinochem Nanjing Corporation,
All Right Reserved
Dichloroethane—or EDC, as most folks in the industry call it—didn’t just show up in the chemical world. Production scaled up back when large manufacturers realized it could fill gaps in polymer and solvent industries. People first made EDC using chlorine and ethylene, and that simple but effective reaction put it on the map as both a feedstock and a solvent. The hunger for vinyl chloride in the 20th century kept EDC in demand, with the biggest push coming from the booming plastics business. In my early days working in chemical analysis, EDC always seemed like a fixture, something every major facility dealt with, yet it was often talked about only in back rooms where environmental engineers compared plant histories and process tweaks.
EDC stands as a colorless, oily liquid. There’s a distinct aroma, sharp enough to catch your attention, but not so overwhelming you’d notice it in small leaks. It doesn’t show up in nature in large amounts; every drop in a big plant comes from human activity. Trade names keep changing, but whether you call it 1,2-dichloroethane or ethylene dichloride, you’re dealing with the same substance. Its volatility makes storage and transport a daily challenge; it evaporates at room temperature if containers aren’t tightly sealed. Over the years, EDC earned a spot as a robust intermediate—everyone in the chain, from tanker truck drivers to plastics engineers, recognizes the risks but also the utility.
EDC boils at just over 83 degrees Celsius and has a density higher than water. Unlike some solvents, it doesn’t mix well with water, which prevents quick cleanups after spills. Its solvent strength comes from the two tightly held chlorine atoms bound to the ethylene backbone; those atoms make EDC a favorite in extracting and dissolving reactions. This stability—a double-edged sword—makes EDC valuable for synthesizing vinyl chloride, yet it also means environmental breakdown takes serious time and exposure to light, heat, or certain catalysts. Its flammability gives plant operators something to worry about, since vapor forms flammable mixtures with air and can catch fire if someone ignores basic maintenance.
Neither factories nor labs cut corners with EDC. Labels warn of its dangers, with hazard symbols covering fire risk, health threats, and environmental impacts. Tech sheets—based on hard data—insist on storage in cool, well-ventilated spaces, far from oxidizers. The standard for purity remains strict; impurities can derail polymerization or leave residues in end products. As a chemical analyst, I found that even one misread on a vapor detector could suggest a fault in an entire batch run. Modern sensors pick out EDC at very low concentrations in both workplaces and neighborhoods bordering large industrial parks; this accountability forces everyone to take the long view.
Today, most EDC gets made by direct chlorination of ethylene with chlorine gas. This exothermic reaction takes careful balancing—push it too fast, temperatures soar, and yield falls. Some companies opt for oxychlorination, combining ethylene, chlorine, and oxygen with a copper catalyst. Each route gives a slightly different impurity profile, which matters downstream when converting EDC to vinyl chloride monomer. Early chemical engineers relied on simple setups, but more recent processes use towers, condensers, and separation columns to keep reaction conditions steady and emissions in check. As plants modernize, energy use drops, and waste handling improves—a lesson only learned after decades of stricter regulation and industrial incidents.
Nearly all EDC produced in big plants gets dehydrochlorinated to make vinyl chloride, destined for PVC pipes and coatings. But EDC can do more: it acts as a chlorinating agent in pharmaceuticals or specialty chemicals, and it dissolves a range of organic compounds in laboratory setups. Its reactions produce new compounds used in adhesives, inks, and cleaning fluids. I’ve met researchers searching for advanced catalysts that might someday convert EDC into other value-added chemicals, cutting waste, and potentially lowering toxic byproducts. That hunger for innovation keeps academics and industry veterans alike coming back, even as regulatory noose tightens around older uses.
Dig up an old textbook, and you’ll spot names like ethylene dichloride, 1,2-dichloroethane, or EDC. Chemists use the IUPAC label for conferences and papers, but in warehouses or shipping docs, the name changes. These synonyms pop up on global bills of lading and in regulatory checklists, reflecting the chemical’s long history and shifting industrial context. I’ve seen older plants use faded diagrams marked “Dutch liquid,” but whatever you call it, safety practices never change because the formula hasn’t changed.
People who work with EDC know its dangers. Workers suit up in gloves and goggles, because this liquid can get through skin and attack the nervous system, liver, and kidneys. Inhalation—especially during transfer or loading—brings headaches or even unconsciousness if leaks go unchecked. Most plants set up elaborate ventilation systems and alarms calibrated to catch even minor vapor rises. Spills trigger thorough emergency drills, with fire crews and on-site HAZMAT teams ready around the clock. The stakes rise for communities near chemical plants; tighter emission controls and routine groundwater testing represent victories for public health won over decades of advocacy. Everyone from regulators to line operators plays a role, because a single oversight can turn routine work into disaster.
Most of the world’s EDC turns into vinyl chloride for making PVC, which goes into pipes, siding, medical devices, and countless everyday products. That pipeline alone keeps entire economies moving, from raw feedstock producers to construction crews. Aside from PVC, EDC shows up as a solvent—chemists rely on its ability to dissolve oils, waxes, and resins. Laboratories trust EDC for extracting detailed organic compounds, proving useful in research where only a few other liquids measure up. There’s caution here, too: cleaning and degreasing once leaned heavily on EDC, but stricter rules and new technology now edge it out in favor of less toxic choices. As consumer demand shifts, so do EDC’s end uses.
Researchers chase cleaner EDC production methods using catalysts that run cooler and make less waste. There’s real appetite to discover safer alternatives, not just because EDC is dangerous, but because public scrutiny keeps climbing. Recent studies look at the molecule’s breakdown in the environment, tracking how long it lingers in soil or water, and how natural processes might aid cleanup. Others focus on recycling chlorine from industrial EDC streams, a practice that cuts costs and waste at once. At conferences, there’s a sense that the clock ticks louder for chemicals like EDC as new green standards beckon, and researchers feel the pressure not just to fix problems, but to anticipate them.
Too many stories exist of workers exposed to EDC years before modern ventilation was standard. Direct contact burns skin, and vapors can make you dizzy or depressed; animals exposed in labs show signs of cancer and organ failure. There’s plenty of data tying chronic inhalation or skin contact to serious long-term illness. Governments list EDC as a possible human carcinogen, with strict workplace exposure limits in place. Over the years, community groups have pushed for independent monitoring, arguing that even small leaks pose danger to neighborhoods near plants. These aren’t abstract threats—every year brings new studies on low-dose impacts, pressing companies to find new containment and detection tech.
Factories churn out EDC in massive volumes because plastics made from vinyl chloride remain integral to global infrastructure. Still, environmental pressure climbs higher, and new research highlights the mess created by EDC’s persistence in air and groundwater. Industry insiders quietly admit the need for alternatives, whether through new solvents, different polymer routes, or tech that sharply limits emissions. Pilot projects test bio-based pathways or smart recycling of spent EDC, signaling a shift that’s slow, but inevitable. Regulators keep raising the bar, not out of knee-jerk fear, but out of a hard-won understanding that costs measured in health and safety are never truly “external.” EDC presents a story that keeps evolving, shaped by human ingenuity, pressure to solve old problems, and a frank acknowledgment of the limits of twentieth-century chemistry. That push for better answers isn’t just smart business—it’s plain necessity.
Many hear “dichloroethane” or “EDC” and their eyes glaze over. Sounds like something hidden away in a dusty chemistry textbook. Truth is, this stuff threads its way through daily life more than most realize. EDC stands out because factories rely on it to churn out vinyl chloride monomer (VCM). Now, VCM is the main building block for PVC—what you find in pipes, window frames, and cable insulation. Look around any construction site and you’ll see the legacy of dichloroethane in those thick, white plastic pipes. It’s not just about convenience, but also cost. PVC pipes don’t rust, and folks like paying less for their plumbing.
EDC helps more than the construction world. Industrial cleaners draw on EDC since it dissolves grease and oils better than hot water ever could. In my own time wiping down an engine block for a project car, I’ve seen how solvents like this break down messes that just won’t budge. That same property means EDC has slipped into the textile industry, where it removes unwanted residues during processing. Factories also use it for making some pesticides and for extracting organic substances in labs. It’s one of those backbone chemicals that keeps other manufacturing gears turning, even if nobody talks about it over dinner.
Science gives a clear message: dichloroethane can be downright dangerous. I’ve heard stories from workers who remember the old days before strict safety rules. Some spent years around EDC fumes with little more than open windows for protection. EDC vapors can harm your liver and might even cause cancer after long enough exposure. That’s not fearmongering; the U.S. EPA and the International Agency for Research on Cancer back it up. Breathing too much of it over time threatens the nervous system, so headaches and dizziness show up early—and worse problems follow.
It doesn’t just vanish after use. EDC leaks have hurt groundwater in some places, leaving drinking water unfit for families living nearby. Cleanup takes time, and even small spills can linger for decades.
Rules today help keep EDC in check in countries with strong oversight. Laws put pressure on chemical plants to contain EDC, measure workplace air, and keep tanks sealed. Those steps matter a lot. The CDC recommends protective gear and good ventilation, so workers get a fair chance at staying healthy. Communities living near chemical plants want regular updates, not just corporate promises. I’ve found that when companies open lines for neighbors to get real answers, trust grows, and fewer accidents fly under the radar.
Society needs safer alternatives when possible, so research dollars should flow to materials that don’t lean on EDC. Smart design in factories, investment in leak detection technology, and supporting the next wave of chemists looking for replacements go a long way. The world doesn’t stop needing PVC overnight, but pushing for transparency, stronger oversight, and honest health monitoring keeps workers and neighborhoods from paying too high a price.
Bringing things back to basics, EDC powers the modern world in ways most folks don’t see. We owe it to ourselves—and especially to those making, using, and living near this chemical—to balance practical benefits with real health and environmental care.
Ask anyone who’s worked with Ethylene Dichloride—EDC—and you’ll likely hear the same thing: respect this chemical. My run-ins with EDC, mostly in industrial settings, taught me early that casual attitudes don’t mix well with hazardous substances. EDC is a clear, sweet-smelling liquid that hides its dangers well. It often shows up in PVC production and acts as a solvent or intermediate in many factories worldwide. Mishandling it can leave you with burns, headaches, or worse, something no workplace wants on its record.
Skipping personal protective equipment isn’t an option. Splash-proof goggles and gloves rated for chemical resistance—think nitrile or neoprene—make up the baseline. Lab coats offer some protection, but in larger facilities, chemical-resistant suits and boots provide an extra layer. Folks often get tired of wearing respirators, yet EDC fumes can irritate the lungs and might even lead to chronic issues with repeated exposure. Respirators fitted with organic vapor cartridges cut down that risk.
Old timers would sometimes crack a window and hope for the best. Building engineers today design workspaces with heavy-duty exhaust fans and fume hoods. Keeping EDC vapor concentrations below exposure limits keeps everyone out of the danger zone. Don’t forget: routine checks on airflow and ventilation filters spot problems before they get serious.
Pouring or transferring EDC for the first time can be nerve-wracking. It evaporates quickly and its vapors, heavier than air, hug low spots in the floor. Drums and containers should always be tightly sealed and labeled. EDC belongs away from flames, sparks, and direct sunlight. Static electricity poses another risk—grounding and bonding containers before transfers can stop a surprise ignition. Once an employee in my plant loosened a cap a little too fast; the fumes hung around and set off alarms. Better to take an extra minute and do it right.
Spills aren’t rare. Teams should drill for leak scenarios often, practicing evacuation and clean-up routines with real gear. Absorbent pads and neutralizing agents work for EDC, but only if they’re easy to reach. On-site showers and eyewash stations save vision and skin. Emergency numbers posted by the door matter more than a dusty handbook hidden in a drawer.
Nobody walks into a plant knowing every hazard. Safety meetings covering chemical exposure help employees at all levels make better choices. Regulatory standards—from the Occupational Safety and Health Administration (OSHA) or similar bodies—give clear limits and best practices. Honest conversations about what’s working and what still needs improving keep people sharp.
Some companies look ahead to greener chemistry or closed-loop production. Investing in research to swap out high-risk chemicals means fewer problems down the line. At the same time, workers who voice concerns about handling procedures often spark improvements faster than memos from the office ever could.
Working with EDC isn’t about fear. With the right habits, teamwork, and up-to-date training, safety becomes second nature—and that protects everyone who steps inside.
Dichloroethane usually shows up as a clear, oily liquid with a sweet smell, almost like chloroform or ether. It's heavy, almost a third heavier than water, so it sinks if spilled in a pond or stream. Pour some into a glass, and it looks just like water but behaves differently — it evaporates faster and leaves behind chilly fumes. The boiling point sits around 84°C, so under regular heat, it turns into vapor rather quickly compared to water. This trait matters: in factories, fumes can sneak into the air unless managed properly. On your fingers, it feels slippery, almost like touching oil, but don't mess around with it—skin absorbs it fast, which can be risky.
With low solubility in water and strong attraction to organic solvents, dichloroethane always finds its way into things like paint thinners and industrial cleaners. Take a bottle of paint stripper from the hardware store: if it smells sharp, it probably has dichloroethane in it. This chemical breaks down sticky resins and plastics, which makes it useful—but it also means you can’t just wash it down the drain. The vapor is much denser than air, so in a workshop, fumes hang low, creating danger for those with poor ventilation.
Dichloroethane falls into the haloalkane category, a group with chlorine atoms hung off a backbone of ethane. Chlorine’s attachment makes this molecule quite reactive. Once exposed to a strong base or heated hard enough, it lets the chlorines go, transforming into other powerful chemicals. Factories use it to make vinyl chloride, which ends up in PVC pipes, making everything from plumbing to kids’ toys. It’s not picky—given the right chemical nudge, it joins in reactions to create adhesives, and, in the past, it appeared in anti-knock gasoline blends before health rules kicked in.
A real concern comes from the way dichloroethane behaves in the environment and with our bodies. It doesn’t break down quickly on its own. Instead, it tends to hang around, migrate through soil into groundwater or drift as vapor through buildings. Inside the body, it gets broken down in the liver and releases small amounts of toxic chemicals, including chloride ions and other dangerous by-products. The EPA lists it as a likely carcinogen, and health agencies have tracked links between regular exposure and problems with the nervous system, liver, and kidneys.
After years of working in industrial labs, I’ve seen how easy it can be to underestimate the risks tied to volatile organics. Workers seldom spot a problem until they feel dizzy or notice a headache—classic signs of vapor exposure. Companies that store or use dichloroethane keep their warehouses cool, monitor vapor levels, and require anyone handling it to use gloves, goggles, and respirators. Local communities push for tougher spill controls, and research continues into less toxic alternatives in manufacturing.
Safer handling starts with better training, straightforward spill protocols, and well-designed ventilation. Engineers now use closed systems—pipes and tanks that keep vapor trapped—so workers don’t breathe in dangerous fumes. At home, most people avoid direct contact, but that’s only possible because agencies keep up with new studies and enforce strong rules. When mistakes happen, fast cleanup and proper reporting help limit long-term harm.
The story of dichloroethane shows how a single chemical, despite its uses, calls for real respect and constant attention—those physical and chemical features spell out both its usefulness and its dangers.
Ethylene dichloride (EDC) shows up in plastic production, especially for PVC, and can be found in some cleaning and degreasing products. It’s also a heavy-hitter on the list of chemicals flagged as hazardous, flammable, and toxic to both people and the environment. EDC can go from a liquid to a gas pretty quickly, and its vapors can knock you out or cause longer-term health problems with enough exposure. So, just tossing EDC into any old barrel, or hauling it around without a plan, endangers workers, the public, and even emergency crews who might have to respond to a spill.
Unlined carbon steel drums or ISO tanks stand out as the top choices for EDC storage. They handle pressure swings and temperature changes without cracking or corroding. Every barrel or tank needs a tight seal to stop leaks and block out water, which can create dangerous byproducts if it mixes with EDC. Some plants have switched to pressure-tested vessels with double-walled construction after watching single layers fail during summer heatwaves.
Anyone who handles EDC should demand clear, weather-resistant labels showing hazard warnings and basic emergency steps. No one wants to fumble for a safety sheet with chemical vapors in the air.
Storing EDC at 15°C to 25°C helps lower evaporation and keeps vapor pressure in check. Heated warehouses or tank warmers might sound safer in cold climates, but too much heat sparks fire risks and puts more vapor in the air. Proper storage areas keep EDC out of the sun and away from open flames or sparks, including frayed electrical wires. Good airflow matters. Ventilation systems need routine checks for blockages or leaks, since poor air movement bumps up the risk of toxic build-ups.
Transport routes for EDC deserve special attention. Haulers should pick routes with low chances of traffic crashes, far from water sources or neighborhoods. I’ve seen what even a small spill can do to a creek: dead fish, emergency cleanup crews in full gear, and a legal mess that drags on for months. Drivers moving EDC must complete hazardous materials training and wear proper gear. Regular drills can prepare them to react fast if something goes wrong—a brake check here, a quick call for backup there saves lives and land.
Fire departments and hospitals in communities near storage or transport routes should get regular updates on EDC volumes, risk zones, and response equipment. A simple phone tree or text alert system can jumpstart an evacuation if disaster strikes. Companies owe it to their workers and neighbors to run safety drills and share plans with local officials. After all, trust doesn’t come from paperwork—it grows from action and clear communication.
Investing in spill-proof valves, sensor alarms for vapor leaks, and GPS tracking on EDC shipments keeps tabs on problems before they get out of hand. Routine inspections paired with surprise audits catch cracks, rusty bolts, or old gaskets before they turn into news headlines. It costs less to prevent an accident than to clean one up—or explain it to a room full of angry parents.
EDC doesn’t belong on a short checklist or under a pile of old manuals. It demands daily attention, real training, and money spent on safety. Taking shortcuts means gambling with lives, business reputation, and the health of rivers and towns. Every drum or tanker should move and sit with the same care you’d demand for drinking water: clear, visible, and respected for its power.
If you check a chemical bottle in any university or industrial plant, you’ll spot a number below the name — that’s the CAS number. For dichloroethane, this code is 107-06-2. Regulators, lab techs, and buyers use this number to make sure everyone talks about the same compound. I’ve seen projects stall over a misquoted CAS number, especially with chemicals with multiple isomers or trade names. Without this identifier, manufacturers risk getting the wrong solvent or setting off safety headaches nobody wants.
Most commercial dichloroethane travels in drums at high concentrations, usually no less than 99.5% purity. Bulk suppliers stamp “technical grade” or “industrial grade” on the certificate, but don’t let these labels fool you — even a fraction of a percent of contamination changes the game. I remember a case in a plastics plant where an off-batch traced back to trace water mixed into their dichloroethane. That single glitch jammed up polymerization, warped the final product, and cost untold clean-up hours. For companies blending this chemical into PVC (polyvinyl chloride) or using it as a degreaser, purity is more than a lab number. Even a slight dip means trouble down the line.
For high-volume industrial settings, dichloroethane leaves the factory with a minimum 99.5% assay. You can spot the difference in price between technical and pure grades, but plant engineers usually prefer to pay more upfront for cleaner material. They’ve learned — sometimes the hard way — that low-grade solvent brings rust, residue, and fouled machinery. Chemical analysis reveals water, alcohols, or organic impurities as frequent culprits. Some facilities request certificates listing chloride and water content down to parts per million, giving no room for surprised in the production run.
Anyone who’s ever opened a container knows dichloroethane’s sweet, chloroform-like smell, warning you of its volatility. Without proper purification, contaminants can become airborne or react in unexpected ways, putting workers at greater risk. I’ve seen small lapses in ventilation let vapors build up, setting off alarms, headaches, and worse. Tighter purity controls mean less risk for the folks moving and handling the drums.
Better transparency helps. Suppliers who offer full breakdowns, not just summary purity numbers, save their customers time and frustration. On the buyer’s end, routine in-house analysis spots problems before production stops or accidents happen. Some companies put batch samples through gas chromatography, so they never take a spec at face value.
There’s an ongoing push for greener alternatives, but for now, dichloroethane isn’t leaving chemical supply chains. Making sure each drum meets the right CAS and purity standard isn’t just paperwork; it’s the heart of safe, cost-effective operation. A little extra diligence at this stage keeps businesses running, workers protected, and finished goods up to par.
| Names | |
| Preferred IUPAC name | 1,2-dichloroethane |
| Other names |
1,2-Dichloroethane Ethylene dichloride EDC |
| Pronunciation | /daɪˌklɔːroʊˈeθeɪn/ |
| Identifiers | |
| CAS Number | 107-06-2 |
| Beilstein Reference | 1209282 |
| ChEBI | CHEBI:35893 |
| ChEMBL | CHEMBL15255 |
| ChemSpider | 5267 |
| DrugBank | DB02180 |
| ECHA InfoCard | 03a7a8f7-6c4e-46b3-a9b0-2e30ebd16e89 |
| EC Number | 203-458-1 |
| Gmelin Reference | 82220 |
| KEGG | C01838 |
| MeSH | Dichloroethane |
| PubChem CID | 10707 |
| RTECS number | KI0525000 |
| UNII | 2D8SF04LOS |
| UN number | UN1184 |
| Properties | |
| Chemical formula | C2H4Cl2 |
| Molar mass | 98.96 g/mol |
| Appearance | Colorless transparent liquid |
| Odor | Sweet chloroform-like |
| Density | 1.25 g/cm³ |
| Solubility in water | 8.7 g/100 mL (20 °C) |
| log P | 1.48 |
| Vapor pressure | 80 hPa (20°C) |
| Acidity (pKa) | pKa ≈ -1.3 |
| Basicity (pKb) | 13.37 |
| Magnetic susceptibility (χ) | -9.85×10⁻⁶ cm³/mol |
| Refractive index (nD) | 1.444 |
| Viscosity | 0.84 mPa·s |
| Dipole moment | 1.80 D |
| Thermochemistry | |
| Std molar entropy (S⦵298) | 145.7 J·mol⁻¹·K⁻¹ |
| Std enthalpy of formation (ΔfH⦵298) | –181.7 kJ/mol |
| Std enthalpy of combustion (ΔcH⦵298) | -1347.1 kJ/mol |
| Hazards | |
| GHS labelling | GHS02, GHS07, GHS08 |
| Pictograms | GHS02,GHS07,GHS08 |
| Signal word | Danger |
| Hazard statements | H225, H302, H315, H319, H332, H351, H373, H411 |
| Precautionary statements | P210, P261, P301+P310, P305+P351+P338, P331, P403+P233 |
| NFPA 704 (fire diamond) | 2-3-0 |
| Flash point | 13°C |
| Autoignition temperature | 411°C |
| Explosive limits | 3.8%–15.4% |
| Lethal dose or concentration | LD50 oral, rat: 670 mg/kg |
| LD50 (median dose) | 680 mg/kg (oral, rat) |
| NIOSH | 201500 |
| PEL (Permissible) | 50 ppm (TWA) |
| REL (Recommended) | 10 ppm (40 mg/m3) |
| IDLH (Immediate danger) | 50 ppm |
| Related compounds | |
| Related compounds |
Ethylene Vinyl chloride Chloroethane 1,1-Dichloroethane 1,2-Dichloroethene Trichloroethane |
