Hubei Xingfa Chemicals Group Co., Ltd
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Dimethyl Silicone Oil

    • Product Name: Dimethyl Silicone Oil
    • Chemical Name (IUPAC): Poly(dimethylsiloxane)
    • CAS No.: 63148-62-9
    • Chemical Formula: (CH3)3SiO[(CH3)2SiO]nSi(CH3)3
    • Form/Physical State: Liquid
    • Factroy Site: No.58 Gaoyang avenue, Gufu town, Xingshan county, Yichang, Hubei, China
    • Price Inquiry: sales3@liwei-chem.com
    • Manufacturer: Hubei Xingfa Chemicals Group Co., Ltd
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    Specifications

    HS Code

    218993

    Chemical Name Dimethyl Silicone Oil
    Cas Number 63148-62-9
    Appearance Colorless, transparent liquid
    Odor Odorless
    Viscosity Varies (typically 10-100,000 cSt at 25°C)
    Density 0.96-0.98 g/cm³ at 25°C
    Boiling Point 150-300°C (varies with viscosity)
    Flash Point ≥ 300°C
    Refractive Index 1.400-1.405 (at 25°C)
    Solubility In Water Insoluble
    Surface Tension 20-21 mN/m at 25°C
    Pour Point -50°C to -60°C
    Thermal Stability Stable up to 200-250°C
    Molecular Formula (C2H6OSi)n
    Grade Industrial/technical

    As an accredited Dimethyl Silicone Oil factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.

    Packing & Storage
    Packing Dimethyl Silicone Oil is packaged in a 200-liter blue steel drum with a tightly sealed lid to prevent leakage and contamination.
    Container Loading (20′ FCL) 20′ FCL can load around 80-100 steel drums, each 200 kg, totaling 16-20 metric tons of Dimethyl Silicone Oil.
    Shipping Dimethyl Silicone Oil is typically shipped in sealed, chemical-resistant containers such as drums or IBCs to prevent contamination and leakage. It should be stored in a cool, ventilated, and dry area, away from strong oxidizers. During transport, containers must be securely closed and handled according to applicable chemical safety regulations.
    Storage Dimethyl Silicone Oil should be stored in a cool, dry, well-ventilated area, away from direct sunlight, heat sources, and incompatible materials such as strong oxidizing agents. Keep containers tightly closed and clearly labeled. Store in corrosion-resistant containers made of compatible materials like stainless steel or polyethylene. Avoid contact with moisture. Follow local regulations and safety data sheet (SDS) recommendations for storage practices.
    Shelf Life Dimethyl Silicone Oil typically has a shelf life of 24 to 36 months when stored in unopened containers under cool, dry conditions.
    Application of Dimethyl Silicone Oil

    Viscosity Grade 1000cSt: Dimethyl Silicone Oil 1000cSt is used in hydraulic dampers, where it ensures consistent damping performance over a broad temperature range.

    Purity 99.9%: Dimethyl Silicone Oil with 99.9% purity is used in food processing machinery, where it provides superior lubricity and minimizes contamination risk.

    High Stability Temperature 250°C: Dimethyl Silicone Oil with a stability temperature of 250°C is used in heat transfer systems, where it maintains thermal conductivity without degradation.

    Low Volatility <0.5%: Dimethyl Silicone Oil with volatility below 0.5% is used in vacuum pumps, where it reduces vapor loss and enhances operational longevity.

    Medium Molecular Weight: Dimethyl Silicone Oil of medium molecular weight is used in textile finishing, where it imparts a smooth, anti-static finish to fibers.

    Kinematic Viscosity 350cSt: Dimethyl Silicone Oil 350cSt is used in cosmetic formulations, where it contributes to easy spreadability and a non-greasy feel.

    Flash Point 300°C: Dimethyl Silicone Oil with a flash point of 300°C is used in industrial mold release systems, where it provides high temperature safety and reliable release properties.

    Low Pour Point -60°C: Dimethyl Silicone Oil with a pour point of -60°C is used in aerospace lubricants, where it enables functionality in extremely low temperature environments.

    Refractive Index 1.402: Dimethyl Silicone Oil with a refractive index of 1.402 is used in optical instruments, where it enhances light transmission and reduces distortion.

    Shear Stability High: Dimethyl Silicone Oil with high shear stability is used in automotive shock absorbers, where it preserves viscosity under mechanical stress.

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    Certification & Compliance
    More Introduction

    Dimethyl Silicone Oil: From Manufacturer's Viewpoint

    What We See In Our Plant—A Product with Character

    The journey with dimethyl silicone oil starts as a hands-on experience. Pouring and blending, checking viscosity by eye and instrument, and troubleshooting tiny changes in each batch give us direct insight into its consistency. We have decades of accumulated know-how about its quirks and how users rely on them. Whether it’s low, medium, or high-viscosity grades, our teams keep the process dialed in, because mistakes show up fast. Each model—350, 1000, 12500, or whatever code customers ask for—has a practical difference that anyone pouring the oil can feel. A thinner grade slips between seals and bearings, while a 12500 grade spreads over surfaces and lingers. In our environment, technicians swap stories about how the smallest adjustments impact fluidity and foam control. These stories shape how we design, filter, and pack the product, never losing sight of how real-world surfaces and machines behave.

    This oil does not just sit on a checklist like an ordinary raw material. Each batch passing through our facility gets checked for clarity and odor. The majority of users care about those traits, so we learned quickly from returned drums that cloudiness or a faint chemical smell leads to headaches. Over time, our process now prevents these problems. Not every synthetic oil has this level of direct scrutiny. While high-volume commodity oils might get a quick inspection, our silicone oil attracts more attention because trouble in defoaming, lubrication, demolding, or as a dielectric fluid shows up fast in downstream applications.

    What Sets Dimethyl Silicone Oil Apart From Hydrocarbon Oils

    Long before we started shipping in tankers, we relied on chemistry’s stubbornness and surprises. Dimethyl silicone oil stands apart because it doesn’t break down easily under heat or electrical stress. In daily factory life, one batch might end up in transformers, another in food-grade release applications, or even in skin lotions. Consistency means more than just staying stable in storage; it means running through hot, cold, and wet conditions with minimal viscosity change. Traditional mineral oils, especially cheaper grades, cannot keep up in terms of thermal and oxidative stability. One electrician once commented that it’s the only oil he trusts for high-voltage switches. Those small comments point out the value that company documents sometimes skip.

    Another separation from regular organics comes down to interaction. Dimethyl silicone oil resists sticking and reacting with plastics, rubbers, and metals. I hear plenty of feedback from line operators dealing with gaskets or O-rings who see swelling and softening with other fluids, but much less so with our silicone formulas. Over the years, we fielded questions about residue and compatibility with sensitive surfaces in fields ranging from optics to aviation rubber parts—practical needs that shaped the design choices in refining, end-capping, filtration, and packing.

    Evolution of Specifications—Responding to Real Problems

    Inside our labs and production halls, product specs do not come from textbooks alone. Chemists respond to reports from customers who spot microscopic foaming or unwanted slickness. We adjust water content, filter out ionic residues, or boost flash points for electrical uses. Early on, some users complained about static buildup around high-speed bottling machinery. That sent our team back to the drawing board to test various polymer chain lengths and end groups. The result: a range of models tuned for antistatic, antifoam, or slip properties, all traceable to someone’s real-world challenge.

    Packaging evolved because users pointed out leaks in steel drums, or requested non-reactive inner coatings to prevent trace contamination. Some specialty customers wanted small, custom-filled bottles to preserve purity in laboratory settings. As a manufacturer, adapting to these changes required more sophisticated bottling and transfer lines, stricter clean-room settings, and rigorous in-process checks for every pail, tote, and bulk cylinder. It’s a constant feedback loop—each product version tangibly influenced by people using it beyond our gates.

    Meeting the Demands of Industry—What We Hear From Users

    Quantity demands can shift overnight. Years ago, we saw a surge from the textile sector as a global apparel boom kicked off. Dimethyl silicone oil went into softeners and sewing lubricants at scale. In years where insulation manufacturers ramped up, our output for cable filling grades took off. Other times, we slowed down some lines and sped up others as automotive, personal care, or paint surfactant producers adjusted their needs.

    We work closely with engineers and procurement teams. One technical manager at a paper mill wanted an oil that resisted shearing and mixed quickly with their defoamer blend. Our in-plant team modified viscosity curves and cross-checked anti-foam retention with side-by-side lab trials. Since then, improved grades caught on externally. End-users often ask for documentation on heavy metals, D4/D5 residues, or halogen screening. This forced us to improve analytical infrastructure. Regulations changed rapidly as more countries limited cyclic siloxanes in finished consumer products, so we adapted by shifting towards cleaner synthesis routes and better purification, as well as regularly reporting lab values to our customers.

    Continuous Improvement—Real Challenges and Real Solutions

    Product improvement rarely occurs in a vacuum. Every day, drums and IBCs head out to companies with time-critical processes. A mistake means lost time on a food-contact conveyor or missed lubrication in a new automotive design. Over the years, feedback focused our attention on small but recurring issues—oil haze that clogged machine heads or detectable odors in medical device molds. In response, we invested in better heating and vacuum systems to ensure tighter molecular weight distribution and more effective stripping of volatile side products. More precise process control did not show up only in internal charts but showed up as fewer complaints, and customers sticking with us for repeat orders.

    Technical support goes beyond standard answers. Sometimes we troubleshoot a batch on a customer’s site, not just by reviewing specs but by getting hands dirty, testing application methods, and reviewing their cleaning protocols. This hands-on manufacturing involvement ensures claims are not just marketing lines; we see the products succeed in the field.

    End-Use Diversity—Silicone Oil Beyond the Obvious

    As a core material, this oil finds its way into more corners than people realize. Aside from heat transfer fluids or electrical insulating oils, dimethyl silicone oil appears in polishing, personal care, urethane foam manufacture, industrial lubricants, heat-resistant greases, and even baking release sprays. Practical details in formulation often tip the balance. An industrial baker once reported that a competitor’s batch carbonized at high oven temps. After running our 1000 cSt oil, residues dropped dramatically and pans stayed cleaner longer.

    Manufacturers of PU foam use the oil as a cell regulator. It shapes foam uniformity and breathability, not merely by ingredient list, but by actual foam cell structure and collapse rates. Every year, teams from our facility spend time with polyurethane specialists to directly watch and learn from line operators, swapping samples to see firsthand how our adjustments translate into end product results. This direct contact shapes tweaks in viscosity and volatility, reinforcing a feedback cycle between plant floor and application field.

    Cosmetic formulators often demand more purity and clarity than technical users. For these industries, we dedicate special process streams, filter media, and de-ionized water treatments, as well as special packing lines to cut risk of contamination. Again, these investments stemmed from specific user complaints or shifting regulatory guidelines rather than distant market trends.

    Where Dimethyl Silicone Oil Excels—Real-World Testimonies

    Lubrication gets tested with every moving belt and bearing. Maintenance personnel often report that silicone oil’s resistance to oxidation and lasting film help them stretch maintenance cycles. Unlike hydrocarbon greases that gum up, silicone oils keep rotating equipment quieter and cleaner for longer intervals. In food-processing lines, where cleanliness and non-toxicity matter, users rely on our food-grade models, recognizing the safety that comes with high-purity synthesis.

    On the electronic side, high dielectric strength, coupled with safe performance across a wide temperature range, keeps demand steady among capacitor, transformer, and fuse manufacturers. Some years, a sudden spike in new solar inverter or EV battery cooling projects sends requests for custom-modified grades suitable for tight gap-filling or high heat settings.

    Water repellency presents another advantage. In construction and stonework renovation, our customers use silicone oil as a hydrophobic treatment on masonry and facades to prolong material life and appearance. These conversations about weather resistance bring our chemists and field staff together to compare old and new methods, tweaking formulas to withstand harsher climates and aggressive washing cycles. These upgrades do not only happen on paper—they stem from years of field failures and follow-ups.

    Trust Built Over Time—Long-Term Supply Partnership

    As a manufacturer, trust grows through routines—reliable grades, timely support, and backing every pail shipped. One missed shipment or off-spec model can disrupt entire operations downstream. Over years, we've helped clients weather supply disruptions and changing compliance regimes, flexing schedules and stock levels to cover urgent needs. Sometimes it means filling emergency orders or holding finished goods until the right ocean freight opens up. The relationship is about mutual problem-solving rather than simply pushing drums out the door.

    Quality commitments matter most when materials are deployed under pressure. We see fewer claims and longer contracts with firms making safety-critical devices, where traceability and supply stability matter more than price. One customer manufacturing electrical safety switches relies exclusively on our 350 cSt dielectric model because they trust the repeatability of racking tests done in our plant lab. This feedback gives us confidence in the process controls and motivates ongoing investment into deeper batch analytics and targeted operator training.

    Reducing Environmental Footprint—Striving for Better Practices

    Years ago, environmental focus started with simple emissions recording. Today, stewardship means thoroughly minimizing off-gassing, wastewater, and by-product siloxane release. We moved to closed transfer systems, solvent recovery, and containment not just for regulatory reasons, but after seeing firsthand how small leaks and spills unsettle the shop floor. Community concerns over persistent siloxanes have sharpened our monitoring. We also organize regular training, helping customers recycle and safely handle spent oils, featuring hands-on sessions and shared learnings between shifts.

    We keep pace with international changes in REACH, US EPA, and Asian regulatory updates, even surpassing them by screening raw materials for potential PBT (Persistent, Bioaccumulative, and Toxic) residues before they reach blending tanks. Back on the plant floor, solvent management and energy mapping give concrete routes to lower energy use, emissions, and waste. These steps grow out of day-to-day experience, where even a small improvement can ripple through hundreds of tons each year.

    Looking Forward—Guided by Direct Manufacturing Experience

    Every advancement starts close to the line: technician feedback, engineer insights, user calls, and real trial data. Dimethyl silicone oil remains a flexible workhorse because experience shapes its evolution, not just desk-based design. We continue refining process integration, from more precise distillation control to tighter filtration and customizable packaging. Our teams remain ready to co-develop new grades with application specialists, confident that hands-on collaboration delivers more than any promise made in a brochure.

    History in manufacturing this oil taught us to expect the unexpected. Whether facing a sudden supply crunch, a shift in safety standards, or an innovative application, we respond directly—testing, adapting, and sharing both successes and setbacks with our users. Dimethyl silicone oil’s staying power comes from this open-ended learning approach. It is not just another synthetic fluid; it is shaped and reshaped in the field, batch by batch, problem by problem, answering the needs of industries that keep turning, building, and inventing.

    Commitment to improvement drives every barrel, pail, and drum that leaves our site. Each delivered order is grounded in conversation, practical learning, and relentless adjustment, made possible only by staying close to customers, close to the production floor, and close to the science that defines real manufacturing. Dimethyl silicone oil is more than a finished good; it is a product of shared discovery, ongoing effort, and practical ingenuity.