Silicone Oil (Dimethyl Silicone Oil, Polydimethylsiloxane, PDMS) CAS 63148-62-9

Silicone oil (dimethyl silicone oil/polydimethylsiloxane) is the most produced and widely used type of organosilicon material, renowned for its excellent high and low temperature resistance (-50℃ to +200℃), superior electrical insulation, low surface tension, hydrophobicity, moisture resistance, and chemical inertness.

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Product Description

It has an extremely wide viscosity range (0.65-1,000,000 cSt and above), and can provide a full range of low, medium, and high viscosity products to suit different applications. It is widely used in electrical insulation, hydraulic damping, mold release agents, defoamers, cosmetics, polishing agents, and other fields. We can supply industrial, cosmetic, food, and medical grades, and support small-batch trial orders and customized packaging. With access to major ports such as Qingdao, Tianjin, and Shanghai, exports are efficient and hassle-free.

Product Information

ItemDescription
Product NameSilicone Oil (Dimethyl Silicone Oil, Polydimethylsiloxane, PDMS)
CAS No.63148-62-9
Molecular Formula[Si(CH₃)₂O]ₙ
Molecular WeightVaries by degree of polymerization, approx. 162-3000+
AppearanceColorless transparent liquid, odorless, non-toxic
Main TypesDimethyl Silicone Oil (General Purpose) : All side groups are methyl groups; largest production volume and widest application among all silicone oils.
Low Viscosity Silicone Oil: 0.65-5 cSt, excellent flowability, for precision lubrication, thinners.
Medium Viscosity Silicone Oil: 10-5000 cSt, general purpose, for electrical insulation, hydraulic oil, damping oil.
High Viscosity Silicone Oil: 6000-1,000,000+ cSt, thick semi-solid, for damping, shock absorption, grease base.
Modified Silicone Oil: Grafted with special functional groups for specific properties (hydrogen silicone oil, hydroxyl silicone oil, amino silicone oil, etc.).
Medical Grade Silicone Oil: Complies with Chinese Pharmacopoeia/USP standards, for medical devices, drug carriers.
Key Physical & Chemical PropertiesDensity: 0.93-0.98 g/cm³ (25℃); Flash Point: 125-330℃; Low freezing point, high flash point; Low surface tension, excellent water repellency; Insoluble in water, soluble in carbon tetrachloride, benzene, chloroform, ether, toluene
Service Temperature Range-50℃ to +200℃ (long-term use)
FeaturesExcellent high/low temperature resistance (-50℃ to +200℃); Excellent electrical insulation; Water repellent, low surface tension; Low viscosity-temperature coefficient; Chemically inert, physiologically inert, non-toxic and odorless; High compressibility; Wide viscosity range (0.65-1,000,000+ cSt)
Main ApplicationsElectrical/Electronics: Insulating medium for motors, electrical instruments, transformers, capacitors.
Mechanical: Hydraulic oil, damping oil, shock-absorbing oil, advanced lubricants, diffusion pump oil.
Mold Release Agent: Efficient release agent for plastics and rubber molding.
Defoamer: Defoaming agent for food, pharmaceutical, paper, water treatment, fermentation.
Cosmetics/Personal Care: Hair oils, hair creams, styling products, sunscreens, skin care.
Polishes: Polishes for automobiles, furniture, flooring, leather.
Others: Water repellent treatment for glass/fabrics, heat transfer fluids, hydraulic fluids
Packaging20kg drums, 200kg drums (steel or plastic), 1000kg IBC totes; custom packaging available
Storage ConditionsStore in cool, dry, well-ventilated area; keep sealed; avoid strong oxidizers; away from heat sources
Shipping RequirementsNon-hazardous cargo; protect from leakage, sunlight, and rain


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FAQ

Q1: Is Huafeng Chemical a manufacturer or a trader?
A: We are a professional service provider specializing in chemical foreign trade. Rather than being limited to the products of a single factory, we leverage the chemical industry cluster in Shandong Province to integrate production resources from multiple high-quality manufacturers. This allows us to offer a wide range of sourcing options—covering various product categories and origins—instead of simply pushing a single product. Furthermore, our core competitiveness lies in our professional foreign trade services (covering documentation, logistics, and regulatory compliance), ensuring a smooth and worry-free procurement process for you.


Q2: How is the security of my transaction guaranteed when working with Huafeng Chemical?
A: We strictly adhere to international trade rules (Incoterms® 2020) and accept various payment methods, such as Letters of Credit (L/C) and Telegraphic Transfers (T/T). For new clients, we support small-batch trial orders and can clearly define arbitration clauses and applicable laws within the contract. Additionally, we maintain a robust risk management system to help you mitigate common trade risks, such as exchange rate fluctuations, shipping delays, and document discrepancies.


Q3: Do you have experience serving clients in Russian-speaking regions?
A: Yes. We place great importance on the Russian-speaking market; our team includes Russian-speaking business professionals who are well-versed in the import regulations of Russia and the Eurasian Economic Union (EAEU). We understand the importance of EAC certification to clients in these regions and can assist with related compliance inquiries. We have established connections with chemical traders across various CIS countries and have gained valuable experience in specialized packaging and temperature-controlled shipping designed to withstand harsh local winter conditions.


Q4: How do you guarantee product quality?
A: We implement a strict supplier qualification and periodic audit system. A Certificate of Analysis (COA)—issued by the original manufacturer—is provided with every shipment. We also welcome pre-shipment inspections conducted by internationally recognized third-party agencies such as SGS, BV, or ITS. Should the test results fail to meet the standards specified in the contract, you have the right to reject the goods or request a replacement.

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