|
HS Code |
474139 |
| Chemical Name | Dimethyl Dichlorosilane |
| Chemical Formula | C2H6Cl2Si |
| Molecular Weight | 129.07 g/mol |
| Appearance | Colorless liquid |
| Boiling Point | 70 °C |
| Melting Point | -57 °C |
| Density | 1.07 g/cm³ |
| Solubility In Water | Reacts violently |
| Vapor Pressure | 175 mmHg at 20 °C |
| Flash Point | -6 °C |
| Cas Number | 75-78-5 |
As an accredited Dimethyl Dichlorosilane factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Dimethyl Dichlorosilane is packaged in a 500 mL amber glass bottle with a secure, airtight cap and clear hazard labeling. |
| Container Loading (20′ FCL) | 20′ FCL: Typically loaded with 80-120 drums (200L each) or 16-20 IBCs, totaling 16-24 metric tons, securely packed. |
| Shipping | Dimethyl Dichlorosilane is shipped in tightly sealed, corrosion-resistant containers under a dry, inert atmosphere to prevent hazardous reactions with moisture. Packaging adheres to international regulations for toxic and flammable chemicals. Proper labeling and documentation ensure safe handling during transport. Emergency response measures accompany all shipments to address accidental releases. |
| Storage | Dimethyl Dichlorosilane should be stored in a tightly sealed container, in a cool, dry, and well-ventilated area away from moisture, heat, and sources of ignition. Keep separate from water, oxidizing agents, acids, and strong bases. Use proper chemical safety containers, ensure storage away from incompatible substances, and clearly label the storage area. Always follow established safety protocols. |
| Shelf Life | Dimethyl Dichlorosilane typically has a shelf life of 12 months when stored in tightly sealed containers under cool, dry conditions. |
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Purity 99.0%: Dimethyl Dichlorosilane with purity 99.0% is used in the synthesis of high-performance silicone polymers, where it ensures consistent polymer chain formation and superior material strength. Boiling Point 70°C: Dimethyl Dichlorosilane with a boiling point of 70°C is used in vapor deposition processes, where it allows efficient precursor delivery and uniform thin film growth. Low Viscosity Grade: Dimethyl Dichlorosilane with a low viscosity grade is used in microelectronics manufacturing, where it enables precise coating and improved device miniaturization. Stability Temperature 35°C: Dimethyl Dichlorosilane with stability temperature 35°C is used in controlled chemical vapor deposition laboratories, where it provides reliable process safety and minimizes by-product formation. Molecular Weight 129.04 g/mol: Dimethyl Dichlorosilane with molecular weight 129.04 g/mol is used in siloxane network modification, where it enables controlled crosslinking and tailored mechanical flexibility. Water Content <0.05%: Dimethyl Dichlorosilane with water content less than 0.05% is used in moisture-sensitive coupling reactions, where it reduces unwanted hydrolysis and boosts reaction efficiency. High Reactivity Index: Dimethyl Dichlorosilane with high reactivity index is used in surface treatment of glass fibers, where it promotes rapid grafting and enhances adhesion properties. |
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Years of experience in silicon chemistry have shown us that even small shifts in molecular structure can drive big differences in performance and application. Dimethyl dichlorosilane, or DMDCS, stands apart from other silane compounds because of its unique combination of two methyl groups and two chlorine atoms attached directly to a silicon core. This structure opens doors across industries — not just for research, but for large-scale production where certainty and stability count for everything.
On our line, DMDCS typically leaves our reactors clear and moisture sensitive. The lighter molecular weight brings lowering boiling points compared to its bulkier kin, meaning it works efficiently in controlled environments where vapor-phase reactions need precise tuning. Siloxane polymer producers see a direct advantage. Our grade delivers reliable Si–C and Si–Cl bonds that react cleanly and predictably, making it a favorite for tightly managed synthesis steps.
Every batch that exits our storage tanks tells us that the market’s demands have shifted. Today, electronics and advanced coatings require higher consistency, especially at the molecular level. With DMDCS, we see smoother film-forming reactions. Branched and linear siloxane polymers benefit from the even reactivity of our product, avoiding hiccups like by-product formation or uneven backbone construction.
As a raw material supplier, we’re responsible for more than simply shipping chemicals. We take pride in real feedback from downstream users: they report cleaner surface modifications, less waste, and increased throughput on both pilot and full industrial scale. Our product’s volatility allows integration into vapor deposition setups—semiconductor fabricators prefer DMDCS for its sharp decomposition profile and lower contamination. This is not just a commodity; it shapes end results in ways that bulkier or less reactive silanes simply cannot.
In practice, what does a name like Dimethyl Dichlorosilane really convey? On our floor, we work with material that averages 99.5% purity, straight from fractional distillation. Impurity control is not just a QC checkbox—it prevents water from sneaking in and hydrolyzing Si–Cl bonds, leading to unwanted haze or acidic fogs during loading and use. By investing in tighter seals and advanced drying systems, we maintain stability throughout storage and distribution.
Unlike methyltrichlorosilane or trimethylchlorosilane, which bring more bulk or less reactivity, DMDCS gives formulators the right balance for controlled grafting and end-capping reactions in silicone production. Fewer chlorine groups compared to monochlorinated versions mean gentler reaction pathways, less corrosion on plant equipment, and cleaner product at the end of the line. Our feedback loops—from the operations team through customer R&D—help dial in purity specs that suit everything from lab experimentation to ton-sized reactor runs.
We respect Dimethyl Dichlorosilane’s reactivity. Years of direct handling taught us the risks that come with any strong chlorosilane: exposure to even trace water or humid air sets off rapid hydrolysis, releasing hydrogen chloride gas. Our packaging uses custom-lined drums and ISO containers overpressured with inert gas to stay ahead of leaks and keep the surrounding environment safe. Staff training emphasizes sturdy gloves, full-face protection, and positive ventilation around decanting bays.
Strict processes don’t just protect our company—they protect every customer who opens a container downstream. On-site fire protection meets chemical standards rather than generic industrial ones. We keep spill kits and neutralization basins in place, with regular drills so teams handle unplanned releases confidently. Our safety record stands up to scrutiny because we take the lessons of previous years seriously, not just as stories but as direct input into every SOP update and equipment spec.
Not all silanes fill the same shoes. DMDCS’s value comes from its ability to serve as both building block and modification agent. Silicone resin manufacturers rely on DMDCS to introduce methyl groups, giving final products added flexibility, water repellency, and higher thermal stability. Try the same chemistry with bulkier trichlorosilanes, and batch reproducibility suffers. DMDCS keeps polymer chains trim, predictable, and easy to cross-link. Paint makers and adhesives specialists also benefit from the resultant Si–C bonds, which resist breakdown even under heavy exposure to heat or solvents.
Our product slots into processes building optically clear, weather-resistant resins—ideal for sealants and encapsulants used outside, where UV breakdown threatens long-term performance. Customers trust that our batches will not introduce stray organics, chlorides, or carbonyl traces that could foul high-value downstream catalysts or electronics. That level of control only comes from experience—monitoring and tweaking synthesis loops rather than cutting corners or outsourcing core steps.
We’ve seen how swapping out even one methyl group can change a synthesis pathway. Trimethylchlorosilane may look similar on paper but does little for cross-linking potential. Methyltrichlorosilane ramps up the chlorine content, introducing harsher reactivity that erodes glassware and steel lines much faster. Dimethyl Dichlorosilane, by contrast, keeps reaction setups manageable—plant managers report lower maintenance costs and longer uptime. It also plugs cleanly into gas-phase reactions, producing fewer corrosive by-products when reacting with silicon wafers or glass substrates in electronics manufacturing.
Long-term, that difference means fewer shutdowns, better yields, and less expense wasted on replacement parts and repairs. Where cost is king, those benefits move the needle more than any marketing claim ever could. Our own maintenance logs support that assessment, as do retention rates from clients running high-throughput batch syntheses for years at a time.
Working with chlorosilanes puts us face-to-face with evolving environmental expectations. We not only track regulatory changes but adjust our wastewater and emissions controls far ahead of new rules. Polishing out residual acids and capturing evolved HCl sets benchmarks for local compliance and global export standards alike. We engineered our scrubbing systems so well that we have cut acid emissions measurably every quarter. Instead of viewing environmental investment as cost, we experience the payoff in stable relationships with regulators and neighbors.
Customers downstream, especially those exporting high-value goods, report easier shipments through customs and inspections because the starting materials already meet or beat environmental trace standards. We share detailed substance origin records, giving end users peace of mind when building sustainability reports or pursuing ISO certifications.
We never outsource the core steps of DMDCS production. Our control over precursor silicon, methyl chloride streams, and catalyst systems means no unwanted surprises from inconsistent feedstocks. If we run downtimes on a batch, production teams troubleshoot directly rather than waiting on overseas updates. This approach shields our customers from the supply volatility that plagues buyers who piece together silanes from multiple vendors or resellers.
Facing pandemic disruptions, our in-house stocks and logistics made all the difference—our shipments continued while others scrambled for inventory. We track raw material flows, forecast seasonal swings, and staff around-the-clock to match global time zones. That experience matters, especially for clients running continuous or just-in-time production lines where every delay adds up to lost market share.
Feedback shapes what we do. R&D groups running bench-scale synthesis give us their after-action notes—everything from clogging rates in microreactors to haze formation on specialty films. That direct communication drives small formulation tweaks, sometimes within days of a first report. We adjust drying protocols, re-screen trace contaminants, or change tanker loading schedules to match customer turnaround.
A coating manufacturer recently reported a small but persistent drop in transparency in treated films. Working together, we traced the issue back to subtle increases in organic residues from bulk storage tanks. By switching lining materials and ramping up tank cleaning frequency, we eliminated the problem within the next shipment cycle. This hands-on, flexible response is built into every partnership, big or small.
On a chemical plant floor, efficiency decisions happen minute to minute. DMDCS plays into those choices, giving operators fast-reacting, low-viscosity feedstocks that cut downtime between charges. Flashpoint and volatility properties shape the way we pump, store, and meter material—our teams solve practical issues around fugitive emissions, keeping sight glasses clear, and avoiding coking around pump seals.
Many users only see chemicals as abstract codes or drum labels. We understand that what flows out of our filling lines needs to perform across dozens of production steps, from automated injection equipment to manual batch reactors. Experience tells us which temperature swings are safe for storage, how quickly vapor can condense in cold weather, and what cleaning schedules really keep lines trouble-free without wasting solvent.
Working with potent reagents like DMDCS means training never stands still. Handling practices developed a decade ago don’t address today’s stricter exposure thresholds or the new monitoring and reporting requirements. Our documentation covers much more than regulatory boxes: it drives onboarding, drills, and daily walkdowns on the plant floor. Hazard communication starts with plain language and clear visual aids, not just SDS binders collecting dust.
We measure not just incident frequency but the number of “near misses.” Every early catch—be it a dropped vent plug or hairline crack in a hose—feeds into retraining cycles and updated SOPs. The lessons from older operators shape how we induct new hires, turning institutional memory into standardized best practices.
Chemistry never stands still, so neither do we. Our process improvements focus on intelligent automation—inline sensors flag early impurities, and digital logbooks flag process drift before the material ever reaches final drums. Investing in people means hands-on review with team leaders, not just technology upgrades. Seasoned operators bring problem-solving skills you won’t find in a spec sheet; they catch subtle hints of process off-tracking that data alone would miss.
Direct feedback loops also drive capital investments. If customers report yield increases following tweaks on our end, we make those changes permanent. Sometimes it means swapping in a new condenser design, sometimes overhauling a filtration train. The payoffs show in both reduced energy consumption and in tighter batch-to-batch consistency. Our long-term customer relationships stem from these constant internal improvements matched by real-world results.
We see Dimethyl Dichlorosilane as more than a commodity. Each kilo leaving our plant reflects a combination of hard-won experience, ongoing investment, and a refusal to accept good-enough as an endpoint. By owning every part of the process—from precursor procurement through logistics and customer support—we bring something different to the table than repackagers or distributors.
As new applications emerge—such as next-generation optical films, robust outdoor coatings, and high-temperature polymers—demands on material consistency and purity grow. We stay ahead of that curve by learning not just from our own line, but from every point where our product touches downstream processes. Our openness to feedback, relentless drive for improvement, and trust built over decades keep us aligned with customers, regulators, and the wider community.
Through all these changes, the importance of hands-on technical experience holds true. Dimethyl Dichlorosilane’s value grows not only from its catalog description, but from the long chain of decisions, partnerships, and lessons that grow with every ton produced. Each drum and shipment carry the story of people behind the process, working to ensure safer, smarter, and more responsible chemistry worldwide.