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N-Octadecylmethyldiethoxysilane: Insightful Commentary on a Silane Compound Shaping Modern Chemistry

Historical Development

Silane chemistry started catching attention in the early twentieth century. Back then, researchers searched for surface treatments that could survive harsh environments. Chemists found that modifying surfaces with silanes brought resilience to otherwise fragile glass and ceramics. Over time, the innovation behind organofunctional silanes—especially those with long alkyl chains like octadecyl groups—pushed technical progress forward. N-Octadecylmethyldiethoxysilane survived fads in the chemical world because it solved tough, real-world challenges. When I first worked with coatings, this molecule kept popping up during surface modification studies. It never felt trendy, but its long alkyl tail gave rise to water-repellent layers still respected today for extending product life. Development of this compound paralleled growth in semiconductor tech, glass fiber manufacturing, and advanced polymer design, where reliability and performance earned respect over time.

Product Overview

This organosilane sports a C18 hydrocarbon chain linked to a silicon atom with two ethoxy groups and one methyl group. You use it to create hydrophobic coatings, modify nanoparticles, or couple inorganic materials to polymers. Most chemical supply catalogs list it for specialized research purposes. At a glance: the liquid is usually clear, slightly yellow, and smells faintly like alcohol. Its stability depends on tight sealing, moisture avoidance, and controlled temperatures. One time a colleague let a bottle cap sit loosely overnight, and humidity triggered a sticky mess. Product labels will mention these issues. Bulk suppliers usually ship it in aluminum containers to keep out light and air, and trust me, storage conditions matter; nothing wastes budget like tossing degraded inventory.

Physical & Chemical Properties

N-Octadecylmethyldiethoxysilane has a molecular weight around 400 g/mol. Boiling point hovers above 350°C, much higher than simple alkylsilanes, and the long hydrocarbon tail means it’s poorly soluble in water but handles organic solvents like toluene or hexane well. My first undergrad lab lesson: always use gloves and goggles because it reacts fast with water or moist air, releasing ethanol as a byproduct. That little alcohol smell comes from a hydrolysis reaction, a reminder to keep things dry. If you mix it into a silanization process, the product adheres to glass, metals, and oxides, forming a water-resistant layer just nanometers thick. This hydrophobic property makes it valuable in labs and manufacturing lines dealing with materials that can't afford moisture intrusion.

Technical Specifications & Labeling

Reputable manufacturers give detailed information about purities, which typically run above 96%. Labels specify CAS numbers, molecular structure, and recommended storage temperatures between 2°C and 8°C. Instructions usually warn against exposure to air, moisture, and direct sunlight. I’ve found that ignoring these details invites trouble: I once watched a year’s worth of research go sideways when a mislabeled drum let in water vapor and the product polymerized. Most suppliers now provide tamper-evident seals and suggest working in inert atmospheres. Each shipping pack includes an MSDS (Material Safety Data Sheet), listing flammability, toxicity ratings, and guidelines for accidental exposure. Training new staff to actually read these sheets saves countless headaches down the line.

Preparation Method

Manufacturers make N-Octadecylmethyldiethoxysilane through alkylation of methylchlorosilane with octadecyl derivatives, then follow with ethoxylation in an inert solvent. From experience, carrying out these reactions demands patience and good ventilation, given the evolution of hydrogen chloride or ethanol. Process steps require controlled temperature, water-free glassware, and steady color monitoring. Commercial syntheses often deploy distillation to purify the product, with strict checks for water or alcohol contamination. In research settings, I’ve depended on small-batch approaches because industrial-scale processes need heavy-duty engineering controls—something most academic labs just don't have the budget or licensing to manage safely. Handling these silicon-based chemicals without extreme cleanliness brings consistent batch-to-batch variability, which no one wants when high-end electronics or biomedical coatings are involved.

Chemical Reactions & Modifications

Once prepped, N-Octadecylmethyldiethoxysilane enters chemical reactions that rely on its ethoxy groups. These groups hydrolyze in water or mild acid, forming silanol groups that condense onto glass, ceramics, or even certain plastics, leaving behind a durable, hydrophobic C18 layer. The long chain breaks up water droplet spread on lab glassware—an effect you see instantly when drops bead up and roll away. The silane can also crosslink with other silanes or silicones to form hybrid materials; I’ve worked with teams layering it onto nanomaterials, boosting their thermal stability and making them easier to disperse in organic matrices. Advanced applications combine it with other functional silanes to add antimicrobial or optical features, tailoring surfaces for consumer electronics or high-performance filters. The chemical backbone is flexible—something almost every material scientist appreciates, since it lends itself to both incremental improvement and breakthrough research.

Synonyms & Product Names

This compound goes by several names in literature and product catalogs: n-Octadecylmethyldiethoxysilane, Methyloctadecyl(diethoxy)silane, and ODS-ED. Some technical documents call it C18-MDES. Trade names may differ by supplier, but CAS registration (number 21001-42-5) anchors its identity across research and manufacturing. In my years comparing products for projects, I’ve learned to watch for subtle variations, like differences in alkyl chain length or branching, which can affect performance. Consistent naming remains a recurring pain point for procurement teams if you source from global markets, so knowing key synonyms ensures you don’t order the wrong variant for your workflow.

Safety & Operational Standards

Working with organosilanes, my teams always take safety seriously. N-Octadecylmethyldiethoxysilane reacts with water to release ethanol, creating flammable atmospheres in confined spaces. Ventilation, explosion-proof equipment, and real-time monitoring of vapor concentrations mitigate risks. Skin contact leaves an oily film, and repeated exposure dries out the skin, so gloves and lab coats come standard. Inhalation carries risk of respiratory tract irritation, so fume hoods remain mandatory in my lab—no exceptions. For spills, the best response involves inert absorbents like vermiculite; we never use water, which only increases hazards. Training and SOPs (Standard Operating Procedures) keep everyone on track, promoting a culture of safety. Several published studies recommend secondary containment and rigorous environmental monitoring because improper disposal harms aquatic organisms through persistent film formation on water surfaces.

Application Area

N-Octadecylmethyldiethoxysilane finds use in fields where surface chemistry determines product success. It produces hydrophobic coatings on glass lenses, touchscreens, or solar panels. I’ve applied it to analytical columns in HPLC (high-performance liquid chromatography), where it adds non-polarity and sharpens separation of biomolecules. Some teams use it for fiber-optic cable coatings to cut down on moisture intrusion, which boosts longevity and performance. In advanced ceramics, the silane increases flexural strength and electrical insulation by sealing microcracks and pores. Electronics manufacturers treat silicon wafers or circuit boards with it, raising resistance to corrosion and electrical leakage. The oil and gas industry uses it for water-shedding treatments inside pipelines. In every setting, the key benefit ties back to its stubborn resistance to water, dirt, and chemical attack; that trait pays for itself by extending service intervals and cutting costs.

Research & Development

In the R&D space, N-Octadecylmethyldiethoxysilane plays several roles beyond coatings. Research groups study the interaction between its long alkyl chain and self-assembled monolayers on gold or silicon surfaces. Such experiments provide clues to controlling nanoscale wetting, an essential ingredient in microfluidic devices. I helped a team functionalize nanoparticles with this silane to test compatibility in experimental drug delivery methods; its hydrophobic exterior slowed clearance from the bloodstream in mouse models, a big win for sustained-release applications. Material scientists explore blends with polyurethanes and epoxies to create water-repellent adhesives. Universities file patents on using it as a precursor for mesoporous silicas with tunable pore sizes—vital for next-generation filtration and catalysis. The spectrum of research activity here remains vibrant, fueled by the drive to customize surfaces for smart materials, environmental sensors, or biomedical devices.

Toxicity Research

Toxicology looks at both acute and chronic effects of the silane and its hydrolysis byproducts. Ethanol, commonly released during hydrolysis, carries known risks—flammability, central nervous system depression, organ damage after prolonged exposure. For the silane itself, research shows skin and respiratory irritation in laboratory animals and cell cultures at high doses. I’ve made a habit of following published LC50 and LD50 benchmarks whenever planning new protocols. Environmental impact also raises eyebrows: the compound’s persistence on water surfaces can suffocate aquatic organisms by restricting gas exchange. Hazard assessments suggest the breakdown products don't bioaccumulate significantly, but lack of long-term studies prompts caution. Regulatory agencies in Europe and the US require labeling for potential reproductive toxicity and environmental persistence. Safe waste management means using only high-efficiency incinerators, never flushing to drains or open ground. In my experience, respecting these limits avoids compliance problems and, more importantly, protects people and the planet.

Future Prospects

The future of N-Octadecylmethyldiethoxysilane looks busy as new technologies cry out for better surface treatments. The thirst for water-repellent, durable materials in electronics, automotive, and renewable energy pushes demand for this chemistry upward. As instrumentation grows more sensitive, even minor contaminants on silicon wafers can corrode microchips—so robust silane layers command attention in cleanroom processes. With the shift toward green chemistry, researchers search for alternatives with lower toxicity or better biodegradability, but the sheer performance of C18-functionalized silanes holds the line in the market. Progress in nanotechnology could unlock new forms of the compound, where self-assembled monolayers serve as scaffolds for smart sensors or invisible coatings on touch surfaces. If regulations on volatile organic compounds tighten, expect a push for reformulated products or process improvements that knock down emissions without losing hydrophobic punch. My guess—based on years watching trends—says N-Octadecylmethyldiethoxysilane will keep paving the way for surface innovations, even as the next generation of sustainable materials slowly enters the scene.




What is N-Octadecylmethyldiethoxysilane used for?

Getting To Know N-Octadecylmethyldiethoxysilane

Few people outside specialized labs talk much about N-Octadecylmethyldiethoxysilane. Yet this mouthful of a chemical pops up in daily life more often than we realize. This silane compound features a long hydrocarbon chain that brings a special talent: it changes how things interact with water. Scientists and engineers reach for it whenever they need a reliable way to make surfaces repel liquids, dirt, and other unwanted guests.

Why Changing Surface Chemistry Matters

A car windshield in a rainy city collects smears and water spots if left untreated. The same goes for building materials like stone, concrete, or glass. Over time, absorbing moisture leads to weathering, stains, and expensive repairs. By treating these surfaces with N-Octadecylmethyldiethoxysilane, they turn from absorbent sponges into water-shedding shields. As someone who’s spent afternoons scrubbing mineral deposits off shower glass, the appeal isn’t just scientific—it sparks real relief.

Stepping Inside Labs and Factories

Research paints an interesting picture. In semiconductor manufacturing, contamination can spell disaster. A stray droplet or dust particle degrades performance and causes defects that cost big bucks. N-Octadecylmethyldiethoxysilane forms a thin, durable layer that guards microchips, keeping them clean through long factory runs. The same trick applies in optical coatings for lenses and in medical devices that need to resist protein buildup. In every case, the compound acts like a raincoat, offering tough protection on the microscopic level.

Challenges and Responsibility

No new chemical comes without questions. The growing use of surface modifiers in consumer and industrial products brings up health and environmental issues. The European Chemicals Agency points out that long alkyl silanes can persist in the environment. In my own city, conversation about chemical runoff pops up every summer as regulators keep a close eye on building projects. Responsible users stick to guidelines that limit exposure and support recycling of treated materials.

The Business Side

Anyone looking to sell electronics, coatings, or stain-resistant textiles pays attention to competitive advances in chemistry. N-Octadecylmethyldiethoxysilane gives products an edge by lowering maintenance costs. Buildings stay cleaner, electronics last longer, and textiles shrug off spills. These selling points meet rising demand for durable goods that meet sustainability standards. Big brands, from phone makers to clothing giants, now ask suppliers which hydrophobic treatments keep products safer without disrupting the environment.

Keeping Science and People in Sync

Getting the most out of this compound means sharing test data, listening to environmental experts, and re-evaluating real-world impact as technology shifts. Some labs now test biodegradable alternatives, searching for similar performance with less risk. Engineers reach out to regulatory agencies and community groups to talk transparency.

With careful handling, N-Octadecylmethyldiethoxysilane helps extend lifespans for products we use every day. Thoughtful, ongoing research keeps its benefits in balance with real-world needs—protecting what matters while keeping trust with the people who depend on science to make daily life a little easier.

What are the storage conditions for N-Octadecylmethyldiethoxysilane?

Why Storage Matters for N-Octadecylmethyldiethoxysilane

I’ve had my fair share of working with specialty chemicals, and without careful storage, costs and risks escalate fast. N-Octadecylmethyldiethoxysilane, a mouthful by name, sticks out as a material where a slight oversight brings up big headaches. This organosilane plays a major role in creating water-repellent treatments, surface coatings, and advanced composites. Contamination, moisture, or heat easily wrecks its valuable properties. Most people outside a chemistry lab don't worry about hydrolysis, but a spilled or degraded drum sure makes people pay attention.

Key Storage Considerations

Keep it dry. Moisture isn’t just a nuisance for N-Octadecylmethyldiethoxysilane—water triggers hydrolysis, breaking the molecule down and leaving behind sticky, useless by-products. I remember once finding a crusty mess at the bottom of an old bottle; someone had failed to seal it tightly. Even opening the container briefly in a humid room leads to gel formation. Employees will thank you if you stay vigilant with conditions in storage.

Temperature swings create more problems than most realize. Warm, fluctuating environments turn delicate chemicals unpredictable. For N-Octadecylmethyldiethoxysilane, sticking with temperatures below 30°C preserves shelf life. At my last facility, I got tired of arguing about air conditioning costs, but a savings here equals a loss in ruined batches.

Seal containers tightly and use original packaging wherever possible. I’ve seen clever attempts at “temporary” storage—transfers to old water bottles, or recycled drums—lead to contamination. Original drums come with liners and seals that lock out air and moisture. Opening the container should be brief and deliberate, never casual.

Ventilation and Fire Safety

You can’t ignore air flow in chemical storage. N-Octadecylmethyldiethoxysilane releases ethanol on contact with air and moisture. In poorly ventilated rooms, this adds to fire risk—ethanol and volatile organosilanes go up fast if a spark finds them. Setting aside well-ventilated, dedicated areas with clear labeling and grounded storage racks helps prevent surprises. Don’t let storage areas double as lunchrooms or break spots; off-gassing becomes a problem when nobody expects it.

Flammable liquid safety cabinets pay off here. By keeping bottles inside proper steel cabinets with spill containment, the odds of a small leak turning into a big problem shrink. Good facilities rotate their stock, make inspections routine, and train every handler in emergency procedures. I’ve seen a five-minute effort prevent thousands of dollars in site cleanup and replacement costs.

Keep People Informed

There’s a practical reason to keep up-to-date chemical records and run regular stock inspections. Material safety data sheets from suppliers matter only if everyone pays attention. I’ve worked with teams that drilled weekly on chemical handling—leaks, spills, or old stock aren’t mysteries when someone actually checks containers.

Simple actions, like using desiccant packs in cabinets or color-changing humidity cards, provide another level of confidence. Even a basic log of opening dates alerts staff to aging stock. Repackaging and clearly labeling everything, not just the first bottle, sets up long-term safety.

Final Thought: Safe Storage Supports Good Results

N-Octadecylmethyldiethoxysilane isn’t a chemical to treat lightly. Dry, cool, sealed, and ventilated storage, along with a culture of regular checks and clear communication, keeps quality up and workplace risks low. Years of headaches taught me that investing in care always beats cleaning up a disaster—and nobody wants a sticky, flammable mess kicking off the work week.

Is N-Octadecylmethyldiethoxysilane hazardous or toxic?

What’s the Deal with N-Octadecylmethyldiethoxysilane?

Folks working in labs or manufacturing might have heard about N-Octadecylmethyldiethoxysilane, especially those handling coatings, sealants, or specialty chemicals. This compound shows up in a lot of surface treatments, thanks to the way it helps stuff stick or stay protected. Considering all the handling, it’s fair to wonder—does it pose serious health risks?

Facts on Hazards and Toxicity

Plenty of safety data sheets give basic information: avoid breathing in vapors or getting it on your skin, don’t splash it in your eyes, and don’t eat or drink around it. N-Octadecylmethyldiethoxysilane often comes up as an irritant. Nose, throat, and lung irritation can show up if you breathe the fumes. Spilling it on skin leaves it itching or red. Getting the liquid in your eyes burns and clouds your vision for a bit.

Talking about toxicity, the biggest concern circles around what happens when the compound breaks down. On contact with water, it forms ethanol and silanols. Ethanol gets processed by most healthy bodies without too much fuss in small amounts, but breathing in a vapor cloud or splashing high concentrations on your skin is a whole different story.

Animal studies set the tone on toxicity: at studied exposure levels, researchers saw minimal systemic toxicity, but irritation happened. According to EU chemical regulations, this compound didn’t get classified as acutely toxic or cancer-causing based on current studies. Still, these rulings use controlled dosages, specific animal tests, and sometimes short windows of exposure.

Why Should We Pay Attention?

Nobody wants their workday to end with an ER visit or a long-term health problem. In my own time handling silane chemicals, I learned that comfort with a routine can lead to carelessness. One slip, like skipping gloves or ignoring ventilation, can mean days of soreness or worse. The effects of some chemicals build up without obvious symptoms—there’s always a chance new studies will turn up concerns we haven’t seen.

Beyond human health, careless handling means spills. Once in soil or water, silanes break down but can still hurt wildlife. Responsible handling protects not just people but soil, streams, and the neighbors’ pets down the road.

How to Stay Safe with N-Octadecylmethyldiethoxysilane

Gloves, eye protection, and proper ventilation—these simple steps make a difference. Anyone working directly with this chemical should use chemical-resistant gloves and splash goggles, and always work in a fume hood or well-ventilated area. Good housekeeping, like cleaning up spills right away and storing drums tightly sealed, can keep unwanted accidents off the records. Training is key. Employers ought to make sure that staff understand safe handling, know where safety equipment sits, and can read the product’s safety sheet without confusion.

On the broader front, companies and regulators have to keep updating safety standards as new information comes out. I trust government sites and international chemical hazard databases for up-to-date info—they cut through rumor with real data. Everyone has a role to play in chemical safety, from warehouse workers to lab managers.

Wrapping It Up

N-Octadecylmethyldiethoxysilane doesn’t strike fear the way some industrial chemicals do, but treating it lightly isn’t smart. Take standard precautions seriously, know the risks, and pay attention to new research as it appears. Safe habits protect you and everyone around you, both on the job and in the community.

How should N-Octadecylmethyldiethoxysilane be handled and disposed of?

A Real-World Substance, Real-World Care

N-Octadecylmethyldiethoxysilane shows up in places you might not expect. Used for surface treatment and in coatings, it packs a punch with its strong chemical action. Experience with silane compounds taught me one thing: the small stuff adds up, and diligence matters. The way people handle these chemicals decides if workplaces stay safe or edge toward trouble.

Personal Experience with Safety

In my early days working at a specialty coatings manufacturer, I watched seasoned colleagues never skip gloves or goggles. It wasn’t overkill; silanes can irritate skin and eyes, and their fumes drift further than you’d guess. Ventilation made the difference between a safe lab and one that forced evacuations. Regular respirators became a habit. The best teams used splash-proof containers and kept absorbent pads close by—spills never happened “sometime,” they happened sooner or later. Fresh air, rapid cleanups, redundancy in safety—these simple habits prevented lasting problems.

Why Proper Storage Seals the Deal

Storing chemicals like N-Octadecylmethyldiethoxysilane in well-sealed, labeled containers eliminates guesswork. From experience, clear labeling and tight lids win out over the fancy storage solutions. Silanes react with moisture. Leaving caps loose opens up leaks, fumes, or slow reactions that create new hazards. The risk isn’t just about a bad smell; it’s about forming substances that might harm lungs, eyes, and even material surfaces nearby.

Disposal: Thinking Beyond the Trash Bin

Tossing chemical leftovers in the regular trash opens up headaches later, both legal and environmental. Local regulations treat N-Octadecylmethyldiethoxysilane as hazardous. Standard garbage trucks and landfills aren’t built for this. Most professional labs tie up their waste, catalog every container, and stick to licensed disposal companies. I’ve seen employees skip this step; just one surprise audit turned into months of paperwork and big fines. Professional disposal outfits neutralize the substance or burn it up in controlled conditions. They keep records that help businesses prove responsibility and care—a lesson everyone appreciates if regulators come knocking.

Training: Key to Fewer Accidents

No number of warning labels replaces actual training. Walk throughs, short refreshers, and up-to-date guides help everyone keep steps straight. I learned the hard way: on-the-job shortcuts meant dealing with a spill that left lasting stains on both a lab floor and my memory. Testing spill kits, reviewing where and how to dispose of absorbents, and running emergency drills all felt like overkill—until our group stopped having surprise accidents. Consistent training meant fewer near-misses and a crew that worked with confidence, not hesitation.

Room for Better Solutions

As new eco-friendly disposal methods gain ground, silane chemistry lags behind in greener alternatives. Investing in research could cut environmental risks. Governments and industry both set standards, but businesses have space to do better. Substituting safer chemicals, improving safety culture, and supporting stronger community waste programs all help. In my years with specialty chemicals, these choices added up to thoughtful safety—and stronger trust among workers and neighbors. Every step toward transparency and care in chemical handling grows not just compliance, but community confidence in science and industry.

What is the chemical formula or structure of N-Octadecylmethyldiethoxysilane?

The Basics of N-Octadecylmethyldiethoxysilane

Thinking about the name N-Octadecylmethyldiethoxysilane can make anyone’s eyes glaze over. On the chemical level, this compound pulls together a few pretty straightforward building blocks. Its structure stacks up like this: there’s a long octadecyl chain (that’s 18 carbons linked head-to-tail), a methyl group attached to the silicon atom, and two ethoxy groups also bound to that same silicon. The chemical formula is C23H50O2Si, with the structural formula written as CH3(CH2)17Si(CH3)(OC2H5)2.

The long hydrocarbon “tail” comes straight out of everyday experience: think about the feeling of oil or wax. Chemists count on this fatty chain when they want to make surfaces repel water, resist dirt, or feel slick to the touch. The silicon core takes action as a backbone, and the two ethoxy pieces connected to that silicon make the compound reactive enough for surface treatments.

Why This Structure Matters

My hands have scrubbed glassware in the lab more times than I’d like to remember, and I know just how much of a difference it makes to have a good surface treatment. N-Octadecylmethyldiethoxysilane helps people create water-resistant coatings. Those ethoxy ends react with exposed silanol groups on glass or metal oxides, transforming the property of the surface completely. Suddenly, what once absorbed water beads it up or sheds dirt with a quick run under the faucet. In research and industry, using a single compound to make surfaces hydrophobic saves steps and cuts costs.

Real Uses Outside the Lab

Beyond the lab bench, this silane pops up in paints and coatings, electronics manufacturing, and even textile treatments. I spent a summer in a facility working with optical equipment, and these types of silanes made the cleaning steps a lot less frequent. Electronics benefit, too — touchscreens and sensors often need water resistance, so workers treat the glass or ceramic surfaces with this sort of molecule. The same goes for textiles aiming to repel spills or stains. Long carbon chains in the silane act like invisible guards, while the rest of the molecule grabs hold through a chemical handshake with the material underneath.

Challenges and Solutions

Handling N-Octadecylmethyldiethoxysilane brings challenges. The ethoxy groups hydrolyze easily, meaning moisture in the air or careless handling can ruin the batch. In one of my early lab gigs, we lost an entire order because we didn’t seal the bottle tight enough; the silane polymerized inside and became useless. Anyone using it needs dry, airtight conditions and a bit of patience. Also, working with long-chain organosilanes sometimes brings up questions about environmental safety. The hydrocarbon chain doesn’t break down quickly, so leftover material or rinse water needs careful disposal.

Industry solutions include improved packaging, proper training, and technological tweaks that slow down unwanted reactions. Quality control in production keeps moisture out, and regulations in waste handling protect soil and water around the plant. Someone mixing silane for a small workshop finds that disposable pipettes, gloves, and a dry atmosphere cut down on messes. Larger-scale users often build climate-controlled storage and set up reclaiming systems to capture any byproducts.

Looking Forward

People keep pushing for versions of these silanes that react just as well but give back a little more to the environment. Students and chemists tinker with the chain lengths or swap out side groups, searching for options that get tough on water but easy on ecosystems. With tighter regulations and rising demand for sustainable chemistry, compounds like N-Octadecylmethyldiethoxysilane sit at a crossroads between industrial convenience and environmental responsibility.

N-Octadecylmethyldiethoxysilane
Names
Preferred IUPAC name N-octadecyl(methoxy)diethoxysilane
Other names Diethoxy(methyl)octadecylsilane
Methyldiethoxyoctadecylsilane
n-Octadecyl(methyl)diethoxysilane
18-Methyldiethoxysilane
Pronunciation /ɛn-ɒkˈteɪdɪlˌmɛθɪldiˌɛˈθɒksiˌsaɪleɪn/
Identifiers
CAS Number 10366-59-1
3D model (JSmol) `C[Si](OCC)(OCC)C(CCCCCCCCCCCCCCCCC)`
Beilstein Reference 3852294
ChEBI CHEBI:89733
ChEMBL CHEMBL185158
ChemSpider 30908210
DrugBank DB11275
ECHA InfoCard 100.242.134
EC Number 208-761-0
Gmelin Reference 1091358
KEGG C20907036
MeSH C088434
PubChem CID 103015
RTECS number XN8575000
UNII EP1E146EBB
UN number UN1993
Properties
Chemical formula C24H54O2Si
Molar mass 341.64 g/mol
Appearance Colorless transparent liquid
Odor Odorless
Density 0.83 g/mL at 25 °C
Solubility in water insoluble
log P 12.1
Vapor pressure <0.01 hPa (20 °C)
Magnetic susceptibility (χ) -73.0e-6 cm³/mol
Refractive index (nD) 1.436
Viscosity 3 mPa·s (25 °C)
Dipole moment 2.3014 D
Thermochemistry
Std molar entropy (S⦵298) 859.84 J·mol⁻¹·K⁻¹
Std enthalpy of combustion (ΔcH⦵298) -11760.6 kJ/mol
Hazards
GHS labelling GHS02, GHS07
Pictograms GHS07,GHS08
Signal word Warning
Hazard statements H315: Causes skin irritation. H319: Causes serious eye irritation. H411: Toxic to aquatic life with long lasting effects.
Precautionary statements P261, P264, P271, P273, P280, P301+P312, P305+P351+P338, P308+P313, P337+P313, P403+P233, P501
NFPA 704 (fire diamond) 1-2-0
Flash point > 121 °C
Autoignition temperature 300 °C
LD50 (median dose) LD50 (median dose): Oral, rat: > 5000 mg/kg
NIOSH GV3855000
PEL (Permissible) PEL (Permissible Exposure Limit) for N-Octadecylmethyldiethoxysilane: "Not established
REL (Recommended) 10 mg/m³
Related compounds
Related compounds Octadecyltriethoxysilane
n-Octadecyltrimethoxysilane
Methyldiethoxysilane
Octyltriethoxysilane
Trimethoxy(octadecyl)silane
n-Octyltriethoxysilane