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Allyltrichlorosilane made its appearance in synthetic chemistry during the rush for organosilicon compounds through the 1950s and 1960s. Back then, chemists aimed to forge new ways to link organic and inorganic structures as the world looked for polymers, coatings, and new types of adhesives. The reaction between allyl chloride and silicon tetrachloride gave the world its first samples—volatile, reactive, and ready for change. As industry demanded more from sealants and rubbers, scientists kept tinkering until a stabilized version emerged. This shift marked a real improvement for safer storage and handling, turning a once-lab-only chemical into something that could be scaled up for industry. The change from unstable, fuming bottles to more shelf-stable containers opened new doors for manufacturing and research.
Stabilized allyltrichlorosilane forms a vital link between traditional chlorosilanes and the kinds of versatile silicones and silanes that industries depend on today. It comes as a colorless liquid, recognizable for its pungent odor and ability to hydrolyze easily on contact with moisture. Bulk buyers in the chemical industry lean heavily on stabilized batches, which resist decomposition and keep shelf life manageable, especially outside lab settings. The molecule carries both reactivity and flexibility, channeling both silicon-based and organic reactions. I’ve seen big demand swings tied to local supply of precursor chemicals. Exporters in China and Western Europe keep prices competitive, but quality really depends on the care taken from manufacturing through shipping.
The main attraction of allyltrichlorosilane lies in its dual nature—a silicon core triple-bound to chlorine and an attached allyl group. Its molecular weight hovers just above 175 g/mol, making it light enough for distillation but heavy enough to handle without major evaporation losses. This liquid boils near 110°C under atmospheric pressure; check for sharp increases in vapor pressure with even modest temperature rises. Density lands close to 1.2 g/cm³ at room temperature, so it pours differently than most common solvents. The material evaporates quickly in an open container, and its solubility in organic solvents often surprises first-time users. Moisture-sensitive doesn’t even begin to capture the speed at which it reacts with water—fumes of hydrochloric acid build up within seconds, leaving behind a sticky residue. Safety sheets call for special care handling such volatility.
Today’s commercial allyltrichlorosilane, sold as stabilized grade, typically guarantees a purity above 98%. Labels outline the minimum levels of stabilizing additives, often proprietary blends that function by scavenging trace moisture and preventing polymerization. Containers carry warnings for corrosivity, flammability, and strict storage at cool, dry sites away from bases and acids. Globally, shipping aligns with UN number 2987, which covers most trichlorosilanes. Proper labeling has to list net weight, batch codes, expiry date, and manufacturer contact, all in compliance with regional hazardous materials regulations. Any slip-up in packaging leads to leaks and, occasionally, costly product losses for smaller operations.
Chemists in the early years used direct synthesis—blending allyl chloride gas with excess silicon tetrachloride, usually under pressure and with a catalyst like aluminum chloride to get things moving. Today, high-throughput plants keep catalysts sealed and reactions automated for precise yields. The final step introduces stabilizers while purging byproducts from the bulk liquid. Every liter produced involves checks for hydrolyzable chlorine, as leftover moisture triggers unwanted reactions both during and after bottling. I once visited a mid-sized factory in Southeast Asia where poor reactor maintenance led to cross-contamination, highlighting how process control can make or break a supplier’s reputation.
In a lab, allyltrichlorosilane acts like a chameleon. The triple chlorine groups react in succession, opening options for stepwise modification—one chlorine replaces at a time for the craftsman who wants custom silanes. Nucleophilic attack swaps chlorines for alkoxy, amino, or thiol functions, letting a researcher build specialized precursors for siloxane linkages. Under fresher conditions, the allyl group participates in classic electrophilic additions or cross-coupling. Radical-initiated processes (those requiring strong UV or peroxides) turn this clear liquid into a backbone for advanced polymers and resins. Industrial chemists often chase after quick conversions, but scale-up needs careful venting and temperature control. Unchecked, the reaction spits out a mess of hydrochloric acid fumes or leaves behind gunky tar.
This compound travels internationally under a long list of synonyms—"Trichloroallylsilane", "Allyltrichlorsilane", and sometimes just "ATS". Catalog listings might vary by language: US suppliers frequently shorten to "AllylTCS", European companies stick to longer descriptions for compliance, while Japanese and Korean suppliers mix in brand-specific names. Distributors sometimes rebrand to skirt export restrictions, making precise chemical identifiers and CAS numbers vital for research and procurement.
Safety looms large with every shipment. Unprotected exposure—liquid or vapor—leads to chemical burns and serious lung damage. Industry practice makes gloves, splash goggles, and full chemical suits nonnegotiable, especially during transfer operations. Local exhaust systems and negative-pressure workspaces keep vapors from building up. Labs rely on calcium chloride or phosphorus pentoxide dryers to handle accidental releases, neutralizing spills before they reach drains or air vents. Emergency protocols require eye washes and showers within steps of the handling room. I’ve watched a spill ignite panic and eat through solid rubber in minutes because someone underestimated the fumes. Reliable training and strict protocols keep injuries low, but the margin for error stays thin.
Allyltrichlorosilane’s biggest buyers often operate in the silicone polymer sector, spinning it into sealants, adhesives, and modified resins that stand up to harsh environments. Electric insulation, waterproofing sprays, and even medical-grade elastomers start life with one or more steps involving this compound. Custom synthesis services snap up stabilized grades to build silane coupling agents that boost adhesion between glass, metal, and plastics. It’s also used in specialty chemical syntheses—like chiral auxiliaries for pharma, or advanced coatings for automotive applications. Few chemicals transition so smoothly from small-batch lab work to large-scale industrial plants. Its performance in these products supports infrastructure projects in construction, electronics, and transportation, connecting chemistry to everyday life.
Academic and commercial labs keep pressing for new uses. Some groups use allyltrichlorosilane’s versatile backbone to design metal-organic frameworks for gas separations or catalysis. Others look at modifying the allyl side chain, opening up new organic transformations. Materials chemists develop custom silanes with enhanced durability for aerospace or medical implants. Universities and institutes often report tweaks to improve selectivity or reduce byproducts, aiming for greener, lower-waste processes. Funding agencies pay particular attention to routes that lower chlorinated waste—this pushes research toward alternative solvents or catalysts, narrowing emissions. I’ve watched joint industry-university teams race to patent slightly better methods, all hoping for an edge in high-value manufacturing.
Toxicology groups have tracked the impacts of stabilized allyltrichlorosilane, confirming its corrosive nature on skin, eyes, and respiratory tissue. Inhalation leads to rapid-onset pulmonary distress, so transporters and handlers train for spill response and regular medical checks. Animal studies show acute toxicity at exposures above 400 mg/kg, but workplace standards usually set far below this—airborne levels stay tightly controlled, with frequent air sampling. Long-term effects appear tied to chronic irritation or, in unventilated spaces, possible sensitization. Environmental data shows rapid hydrolysis and breakdown when spilled, with local acidification as the main ecological hazard. Waste disposal focuses on neutralization and dilution before environmental release. Global safety agencies update recommendations as new data surfaces, forcing constant policy review among users and producers.
Looking ahead, stabilized allyltrichlorosilane stands at a crossroads with trends in sustainable chemistry. Demand for high-performance polymers won’t slow, but industries look harder at reducing the hazards and waste linked to traditional chlorosilanes. Research teams work on ways to tune reactivity for fewer hazardous byproducts and better compatibility with renewable or recyclable feedstocks. Automation, digital tracking, and remote handling promise to lower human risk while squeezing out tighter process controls. Commercial pressures push suppliers to lower the environmental footprint of both manufacturing and downstream disposal—this may mean redesigned stabilization formulas or entirely new synthesis pathways. Young chemists entering the field find rich ground for innovation, with academic and industrial partners both searching for safer, cleaner alternatives that don’t sacrifice performance. New discoveries in organosilicon chemistry could open replacement products or expand into uses not yet imagined.
Allyltrichlorosilane [Stabilized] might sound obscure to plenty of people outside the chemical industry, but it makes a real difference in labs and factories. Walk through any modern workplace where silicones get built from scratch, and you’ll stumble across it. It stacks up as a handy building block—a starting point for making all sorts of things, from specialty coatings to advanced adhesives.
I remember the first time my team was handed a flask of it, bubbling in its glass container, needing extra care. Its structure combines a reactive allyl group with three chlorosilanes—something that creates both opportunity and risk. Folks in the business know that the “stabilized” label means less fuss over storage, but that doesn’t make it forgiving. Reactivity remains a big part of its draw, letting chemists attach organic groups to silicon atoms efficiently.
Picture a factory where researchers try to connect organic compounds to silicone materials. Allyltrichlorosilane [Stabilized] steps in as a linking piece. Its silicon atom acts ready to bond, and the allyl part lets it reach out toward other molecules. This isn’t just theory. Large manufacturers rely on these reactions to build modified silicones for waterproofing products, electronics encapsulation, and even specialty rubbers. I remember how our own binder prototypes jumped up a notch in toughness and flexibility once we experimented with this molecule as an intermediate.
Its versatility means different fields call on it for help. Some companies target coatings that battle moisture or resist corrosion. Others push for new adhesives that grip better in extreme cold or heat. Consumer electronics turn to materials built on this chemistry for their insulating layers and protective coatings. At a molecular level, this one compound helps raise the bar on durability and performance.
At the same time, using allyltrichlorosilane [stabilized] takes more than a steady hand. Its reactivity can put lab workers in harm’s way if they get sloppy with protective gear or ventilation. I’ve worked with teams who faced skin irritation and dangerous fumes after skipping steps in handling, especially when rushing an experiment. Making training and strict safety rules routine can head off a lot of problems. Modern processes also favor using stabilization—additives or careful packaging keep the compound in line during transport and storage, cutting hazards that used to be common.
Not everything about allyltrichlorosilane [stabilized] lines up with current goals for sustainability. Manufacturing it brings risks to both workers and the environment if waste gets out of hand. Industry insiders talk about greener synthesis routes or recovery methods for leftover materials. Moving toward closed systems and better recycling could fix some of the waste problems without giving up the strengths of the chemistry.
By sharing lessons, tightening up safety training, and investing in cleaner processes, the industry can keep the benefits without passing the risks on to people or the planet. My experience with this compound has taught me that progress never really stops—there’s always space for another layer of protection, another round of innovation, or a new approach that works better than the old one.
Allyltrichlorosilane, the stabilized version or not, isn't something that belongs in a casual workspace. It reacts fiercely with moisture, giving off hydrogen chloride gas. Breathing that stuff burns your throat, eyes feel like they’re on fire, and skin gets raw even from a tiny splash. Workers in chemical labs and manufacturing plants run the most risk, especially in places where training sometimes plays catch-up with tight deadlines or staffing cuts.
A solid, tested set of personal protective gear makes the difference. Forget just gloves and goggles; think chemical-splash goggles, full-face shields, rubber aprons, and nitrile gloves under thick neoprene gloves. Even a quick transfer can go south, and just a droplet causes burns and clouds the air. Respiratory protection becomes important when tinkering with a substance that fumes anywhere near moisture.
I’ve seen situations in academic labs where a simple N95 mask and a lab coat aren’t enough. Gaps in protective gear leave room for disaster. Half-face or full-face respirators with acid gas cartridges provide peace of mind. Sometimes, only people who’ve felt that tingling, stinging sensation from improper PPE understand why shortcuts leave scars.
Chemical fume hoods aren’t there for decoration. Proper ventilation whisks away airborne toxins before a nose can pick up trouble. Storage practices matter almost as much as handling. Allyltrichlorosilane prefers a cool, dry nook, locked away from moisture and acids. Use sealed containers that keep humidity out. Clear labels and up-to-date safety data sheets keep everyone on the same page.
Trained eyes scan containers for cracks and corrosion. I remember a stint helping clean up a forgotten chemical stockroom. Leaky bottles meant clouded air and wasted shifts on decontamination. Regular checks pay off far more than emergency calls or rushed evacuations in the middle of a busy afternoon.
No one becomes a chemical safety pro overnight. Training needs real-world examples, not just printed slides and quizzes. Handling Allyltrichlorosilane safely means learning by doing—under the eye of a mentor who’s already made a mistake or two. Refresher courses and regular drills help muscle memory kick in during actual spills.
Spill kits packed with neutralizers, absorbent pads, and chemical-resistant scoops stay close by. Emergency showers and eyewash stations should stay clear and functional. Calling for help isn’t a sign of weakness—it signals respect for chemicals with a punch like Allyltrichlorosilane.
Disposing of leftovers calls for strict steps. Waste containers must stay sealed, labeled, and never mixed with other chemicals. I’ve seen what happens when a well-meaning janitor collects odd liquids in a mop bucket—clouds rise, alarms sound, everyone scrambles outside. Trusted disposal contractors who know the difference between “hazardous” and “harmless” remove that chance of simple mistakes turning into headline news.
Working with Allyltrichlorosilane demands more than a checklist. It calls for honest conversations about risks, ongoing investment in protective gear, and respect for every step—no matter how rushed the workday gets. Each day handling it without a hitch reinforces the bond between solid training, hands-on experience, and a culture where safety gets more than lip service. Nobody looks forward to an accident; preventing one feels a lot better.
Chemicals like allyltrichlorosilane [stabilized] come with a story—a mix of sharp reactivity and real hazards. If you handle this material in any lab or industrial setting, the risks turn personal. It reacts quickly with moisture. It gives off hydrogen chloride, a toxic gas that burns eyes, skin, lungs. No one wants to head home early nursing chemical burns or after an emergency evacuation. That’s reason enough to learn the best way to store it.
Water is the enemy. The smallest amount—humidity, a drip, a loose lid—brings an unwanted reaction. In my own work with moisture-sensitive chemicals, vigilance becomes habit. Even a tiny slip can spell ruined material or sudden danger. Store allyltrichlorosilane in a dry, tightly closed container. The container itself should be glass or high-grade plastic that stays sealed.
Heat speeds up reactivity. A cool, well-ventilated storage room cuts risks. Store it in a refrigerator or dedicated flammable cabinet, controlled for temperature but never freezing, since freezing weakens containers and causes leaks. Never stack it near heaters, steam lines, or in places where sun creeps in. I recall a near-miss at a university lab when a poorly labeled bottle sat on a window ledge—after an afternoon in the sun, it oozed its contents and left a harsh, sour odor in the whole building. Lessons like that don’t fade.
Storing it next to acids, bases, or anything with water in it raises the risk of a violent reaction. Place it separately, label it clearly. More than once, a janitor or new technician has pulled bottles from shelves without realizing what’s inside. Clear labeling saves time—and sometimes lives.
Anyone handling or even checking a bottle of allyltrichlorosilane needs gloves, goggles, and a protective coat. Don’t skimp or try to save time. Even vapors can sting your eyes or throat. From years in research, the most common injuries come when someone thinks “I’m just moving this for a second.” A proper face shield and sturdy gloves always feel a little awkward—until you’ve seen a friend with a chemical burn.
Over months, containers degrade, seals crack, and labels fade. Check storage areas every few weeks. Any sign of corrosion or leaking—deal with it right away, following your local hazardous waste protocols. Most places require paperwork and special disposal procedures. Cutting corners can turn a minor leak into a building-wide evacuation.
Storing allyltrichlorosilane doesn’t mean memorizing dusty rules. It means treating it with the respect you’d give any highly reactive substance. Set up good storage, train each person on the team, update protocols regularly, and make no exceptions. You may not see the payoff every day, but a single close call—or a day when nothing goes wrong—reminds you it’s worth it.
Regulatory agencies like OSHA and NIOSH provide detailed datasheets and best practice guidelines. Your supplier may offer specific advice for their grade of stabilized material. Never hesitate to reach out for help or clarification. The right questions, asked early, save time and hardships later.
Allyltrichlorosilane brings together the reactivity of an allyl group with the industrial muscle of silicon chemistry. Its chemical formula is C3H5SiCl3. In simple terms, that means the molecule features a silicon atom bonded to three chlorine atoms and one allyl group (which is basically a three-carbon chain with a double bond). This set-up gives it some punch when thrown into organic and inorganic reactions.
Most folks working with allyltrichlorosilane notice it’s a colorless or slightly yellow liquid. If you pour it out, a sharp, stinging odor hits your nose right away—no mistaking this for harmless water. Under normal pressure, it boils at about 106 °C. It feels lighter than water, thanks to its density of 1.18 grams per cubic centimeter. This stuff won’t mix with water; instead, it ends up floating on top and, in the presence of moisture, starts breaking down quick.
Handling it at room temperature works fine, but it starts turning into fumes around 29 °C, so even basic indoor labs benefit from solid ventilation. Its vapor pressure at 20 °C clocks in around 16 mm Hg, showing it can jump from liquid to vapor if left open on the bench.
Anyone who’s tried working with chlorosilanes knows they live on the edge. Allyltrichlorosilane gets stabilized because it loves to react—fast—with air or water. Exposure to atmospheric humidity breaks it down into hydrochloric acid fumes and silicon-containing residues. That’s not just a mess; it can also mean unpredictable results or ruined batches in the lab. Stabilizing agents make it easier to ship, store, and use in controlled conditions.
Most chemical safety bros around the world, from OSHA in the US to REACH in Europe, put this compound on their watch list. Direct contact eats away at skin and eyes. Breathing in vapors burns the throat and lungs. Splatters destroy lab benches, electronics, and even steel over time because of the hydrochloric acid it makes. Even with the stabilized form, double gloves, goggles, and chemical hoods aren’t extras—they’re life-savers.
Companies have turned to allyltrichlorosilane for building specialty silicones, adhesives, and coating materials. The chemical’s structure opens a lot of doors for organic synthesis, or for making a surface that tightly grips onto glass, metal, or plastics. This bridge between organic and inorganic chemistry helps push new materials out of the research lab and into smart coatings or rugged composites.
I once saw a plant manager explain how keeping moisture even under 1% cut their waste in half. That lesson—learned on the shop floor, not in a textbook—shows how minor detail in physical properties shapes costs, safety, and product purity. Leaks or poor storage end up costing real money, whether through ruined inventory or safety non-compliance.
Safer storage doesn’t have to get complicated. Tightly sealed containers, nitrogen blanket, and fast transfer systems cut exposure and loss. Training workers about splash risks and reaction speed beats relying on labels or warnings alone. Pursuing alternatives—greener silane derivatives—could shrink the risks even more, but until then, respect for the basics keeps everyone safe and makes sure the chemistry works as expected.
Anyone who has handled reactive chemicals knows that a single misstep can cause chaos. Allyltrichlorosilane sits high on the list of compounds that demand respect; contact with water or even humid air can release a storm of flammable and corrosive fumes. I remember standing in a lab, watching an untrained colleague unscrew a bottle of something similar—his hands shook, knowing one drop could cause a nasty reaction. That memory taught me preparation is not about paranoia; it’s about cutting down risks before they spiral.
You’ll smell trouble before it becomes obvious. Sharp odors, hissing, or clouding air spell danger. Spills often bring panic, but panic only feeds mistakes. Most accidents happen because people try to clean without proper gear. Splashing water onto spilled allyltrichlorosilane means splashing hydrochloric acid into your face.
Experienced workers suit up before getting near the stuff. Chemical splash goggles, face shields, gloves made for strong acids, and a heavy apron form the first barrier. Anything less just invites a trip to the emergency room. I once saw nitrile gloves eaten away almost instantly in the wrong solvent—cheap shortcuts don’t belong around allyltrichlorosilane.
Fight the urge to mop up or reach for water. Non-sparking tools and dry sand—or specialized spill control material—should come out for cleanup. Why? Because water triggers an aggressive reaction. Block off the spill’s path with absorbents to trap the liquid. Tight, careful scooping into a chemical waste drum limits exposure, while a friend keeps the exit path clear. Evacuate anyone who doesn’t wear protection, especially if ventilation lags behind.
Air in the room turns dangerous, fast. Fumes burn eyes and lungs, leave skin raw, and take hours to fade. Years ago, I learned to keep a powered air-purifying respirator within reach—dust masks only offer false comfort. High-volume ventilation, like fume hoods, can’t get switched on fast enough. Get everyone out of the building, then let trained crews return. Lingering in the area trades health for heroics.
If someone gets splashed, no detergent, no rubbing—just peel off soaked clothes and keep washing skin with running water for at least fifteen minutes. This stings like nothing else, but stopping short means permanent scars. Eyes deserve an immediate flush with an eye-wash fountain. Breathing in the vapor? Only fresh air and urgent medical care can bring relief. Tell medical staff exactly what was in the air—doctors need specifics with chemicals like these.
Regulations like OSHA’s guidelines or material safety data sheets provide solid ground rules, but real safety grows from a culture that treats every chemical as serious business. Refresher drills, buddy systems, and routine equipment checks stop most problems before they start. In my experience, regular, unscripted practice builds muscle memory for the real thing—and those drills have saved workers I know. Good intentions count less than practice: spill kits belong where accidents happen, not locked away across the hallway.
A smart workplace trains everyone, not just lab managers. Emergency shutdown switches, alarms that work, and well-stocked, accessible kits mean a slip-up doesn’t become a headline. Encourage reporting of near-misses, because every close call exposes a weak spot before disaster finds it. A little humility—admitting what you don’t know—keeps people healthy, careers intact, and workplaces running safely.
| Names | |
| Preferred IUPAC name | Trichloro(prop-2-en-1-yl)silane |
| Other names |
Trichloroallylsilane Trichloro(2-propenyl)silane Allyltrichlorosilane Allyl trichlorosilane |
| Pronunciation | /əˌlɪl.traɪˌklɔːr.oʊˈsɪˌleɪn/ |
| Identifiers | |
| CAS Number | 107-37-9 |
| 3D model (JSmol) | `Allyltrichlorosilane [Stabilized]` JSmol 3D model string: ``` Cl[Si](Cl)(Cl)C\C=C ``` |
| Beilstein Reference | 3587193 |
| ChEBI | CHEBI:34998 |
| ChEMBL | CHEMBL1906711 |
| ChemSpider | 167246 |
| DrugBank | DB11368 |
| ECHA InfoCard | 100.004.610 |
| EC Number | 205-074-4 |
| Gmelin Reference | 87064 |
| KEGG | C19626 |
| MeSH | D000576 |
| PubChem CID | 24852195 |
| RTECS number | VX8050000 |
| UNII | 9T2K6JD6CM |
| UN number | UN1718 |
| Properties | |
| Chemical formula | C3H5Cl3Si |
| Molar mass | 181.5 g/mol |
| Appearance | Colorless to yellow liquid |
| Odor | Pungent |
| Density | 1.160 g/mL at 25°C |
| Solubility in water | Reacts violently |
| log P | 1.7 |
| Vapor pressure | 2.6 hPa (20°C) |
| Acidity (pKa) | Acidity (pKa): ~2.0 |
| Basicity (pKb) | 13.21 |
| Magnetic susceptibility (χ) | χ -0.72×10⁻⁶ cm³/mol |
| Refractive index (nD) | 1.436 |
| Viscosity | 1 cP (20°C) |
| Dipole moment | 1.17 D |
| Thermochemistry | |
| Std molar entropy (S⦵298) | 317.1 J·mol⁻¹·K⁻¹ |
| Std enthalpy of formation (ΔfH⦵298) | −382.7 kJ·mol⁻¹ |
| Std enthalpy of combustion (ΔcH⦵298) | -1609 kJ·mol⁻¹ |
| Hazards | |
| GHS labelling | **"Danger; H314, H331, H335, H226; GHS02, GHS05, GHS06, GHS07"** |
| Pictograms | GHS02,GHS05,GHS06 |
| Signal word | Danger |
| Hazard statements | H301 + H311 + H331, H314, H335, H410 |
| Precautionary statements | P210, P220, P260, P264, P271, P280, P301+P330+P331, P303+P361+P353, P304+P340, P305+P351+P338, P311, P335+P334, P362+P364, P370+P378, P403+P233, P405, P501 |
| NFPA 704 (fire diamond) | 3-0-2-W |
| Flash point | Flash point: -18 °C (closed cup) |
| Autoignition temperature | 255 °C (491 °F) |
| Explosive limits | Explosive limits: 2.6% to 12.4% (in air) |
| Lethal dose or concentration | Lethal dose or concentration: "LD50 (oral, rat): 380 mg/kg |
| LD50 (median dose) | LD50 (median dose): Oral rat LD50: 320 mg/kg |
| NIOSH | WW2975000 |
| REL (Recommended) | 3 ppm |
| IDLH (Immediate danger) | IDLH: 10 ppm |
| Related compounds | |
| Related compounds |
Trimethylsilyl chloride Triethylsilyl chloride Vinyltrichlorosilane Methyltrichlorosilane Phenyltrichlorosilane |
