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ISO & SGS certificate Silicone oil /Dimethyl silicone oil/ Polydimethylsiloxane
Cas No: 63148-62-9
No Data 1 Kilogram 2000 Metric Ton/Month Wuhan Kemi-Works Chemical Co., Ltd Contact Supplier
High purity Polydimethylsiloxane 99%min TOP1 supplier in China
Cas No: 63148-62-9
No Data 100 Gram 1-1000 Metric Ton/Day Dayang Chem (Hangzhou) Co.,Ltd. Contact Supplier
Polydimethylsiloxane Food and Industry Grade
Cas No: 63148-62-9
USD $ 5.6-5.6 / Metric Ton 1 Metric Ton 8000 Metric Ton/Year Antimex Chemical Limied Contact Supplier
Polydimethyl Silicone oil (DY-201)
Cas No: 63148-62-9
USD $ 2850.0-2900.0 / Metric Ton 1 Metric Ton 1000 Metric Ton/Month Shandong Dayi Chemical Co., Ltd. Contact Supplier
Facoty of Low Viscosity Dimethyl silicone Fluid
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No Data 1 Metric Ton 20 Metric Ton/Day Zhejiang Puka Chemical CO., Ltd. Contact Supplier
Cas No: 63148-62-9
No Data No Data No Data Wuxi TAA Chemical Industry Co.,LTD. Contact Supplier
CHemwill -- Polydimethylsiloxane
Cas No: 63148-62-9
USD $ 1.0-1.0 / Metric Ton 1 Metric Ton 5 Metric Ton/Day Chemwill Asia Co., Ltd. Contact Supplier
Silicone oil
Cas No: 63148-62-9
No Data 1 Kilogram 30 Metric Ton/Month Simagchem Corporation Contact Supplier
High purity Polydimethylsiloxane 99%min TOP1 supplier in China CAS NO.63148-62-9
Cas No: 63148-62-9
USD $ 1.0-3.0 / Metric Ton 1 Metric Ton 10 Metric Ton/Day Hebei yanxi chemical co.,LTD. Contact Supplier
High Quality 99% 63148-62-9 Silicone oil Manufacturer
Cas No: 63148-62-9
USD $ 0.1-0.1 / Gram 1 Gram 100 Metric Ton/Year Xi'an Xszo Chem Co., Ltd. Contact Supplier

63148-62-9 Usage


Any of a large group of siloxane polymers based on a structure consisting of alternate silicon and oxygen atoms with various organic radicals attached to the silicon:

Organic silicone oil

Silicone oil is also known as organic silicone oil. They are one kind of silicone polymers. It is made through hydrolysis of organic silicon with mono-functional group or bifunctional group to form the corresponding mono-, di-silanol with silanol further interacting with each other under acidic conditions to form the cyclic or chain-like polymers, which are further subject to poly-condensation reaction at atmospheric pressure and vacuum conditions to produce silicone oil with certain molecule weight. Silicone oil is an organic compound with closed end groups; it has the structure formula as follows: Wherein R1, R2, R3 may be the either same of different organic groups such as methyl, ethyl, phenyl, vinyl, methoxy, ethoxy, and hydrogen. Those different groups result in different kind of silicone oil. Silicone oil is a colorless, oily substance with its viscosity being able to be formulated as well as having a relatively low freezing temperature. Moreover, its viscosity only changes little with temperature changes. It also has high thermal stability and is not subject to decomposition at high temperature. The end of its chain can’t be subject to further poly-condensation reaction. When being heated to above 400 ℃, it generates low molecular weight products with the bond between the methyl group and the silicon atom being not broken during the thermal decomposition process. Silicone oil also has water resistance as well as electrical insulation resistance with volume resistivity being higher than 1015Ωcm and permittivity ε = about 2.58. It has a low surface tension and is non-toxic. Low molecular weight silicone oil can be taken as Newtonian fluids with gradually shifting toward pseudoplastic fluids upon increasing molecular weight. Silicone oil has a low vapor pressure and high compressibility. It has no corrosion on the metal and is very stable against the vast majority of organic reagents. It has good compatibility with mineral oil and is resistant to dilute acid and alkali. Silicone oil is often used as advanced lubricants, anti-shock oil and insulating oil. It is also used as defoamers, mold releasing agents and the polishing agent of furniture, flooring, and automobile polish as well as the internal lubricants upon plastic processing. It also serves as a heat carrier, anti-vibration damping materials, cosmetics additives, medical polymer materials and glass fiber processing agents. The above information is edited by the Chemicalbook of Dai Xiongfeng.

Silicone oil for lubricating oil

It can be used as the anti-foam agents for oil as well as for synthesizing lubricating oil. Silicone oil is made from Si-O chain and organic compound. It is a kind of odorless, tasteless organic liquid with a high chemical stability, low freezing point, low volatility and excellent anti-oxidation property and resistance to high temperature. It has been over 50 years since at early time when polydimethylsiloxane (referred as silicone oil) was used as an anti-foaming agent. Only if the silicone oil in the lubricating oil is in its insoluble state can it have anti-foaming. In contrast, if it is in a dissolved state, it not only has no anti-foaming property but also plays a role of foaming agent. Therefore, it is very important to choose silicone oil with proper viscosity. It is general to choose the silicon oil with 100~100000mm2/s (25 ℃) viscosity for being the anti-foaming agent. The low viscosity silicone oil is easily to be dispersed to exhibit anti-foaming property, however with large solubility and poor anti-foam persistence; high viscosity silicone oil has a poor anti-foaming property but excellent continuity. In order to draw on the strength of each other, people often mix two kinds of high and low viscosity silicone oil for using in combination. The general applied amount is around 10mg/kg. Methyl silicone oil is produced from the following process: methyl chloride is first reacted with silicon in the presence of copper as the catalyst for generating into chloromethyl silane mixture. Then we further obtain methyl silane through hydrolysis; the methyl silane is further polymerized to obtain methyl with either acid or alkali catalyst. It is an excellent kind of anti-foaming agent with small usage amount and significant efficacy. It has wide applications and is commonly used in internal combustion engine oils and industrial lubricants. For highly dispersing it in the oil, first dissolve the silicone oil in a solvent (such as kerosene) into the concentrate liquid, and then stir and disperse it into the oil. Poor dispersion will result in poor anti-foam effect. Therefore, silicone oil anti-foaming agent is very sensitive to the blending technology. Reference: Wang Daquan “Fine Chemicals Dictionary” Beijing: Chemical Industry Press .1998, page 843.

Safety Profile

An experimental teratogen. Experimental reproductive effects. See also SILICONES.

Production Methods

Silicone elastomers are generally prepared from chlorosilanes. The chlorosilanes are hydrolyzed to give hydroxyl compounds that condense to form elastomers. Applications include electrical insulation, gaskets, surgical membranes and implants, and automobile engine components.

Transformer insulating oil

Silicone oil is an excellent kind of transformer insulating oil with high heat resistance and high flash point. It is not easy to be subject to oxidation and combustion with its long-term working temperature being as high as 200 ℃. Silicone oil can tolerate electric arc, corona. Moreover, the value its dielectric loss factor can keep nearly constant over a wide temperature range (-40~110 ℃) and frequency range (103~108Hz). In addition, it also has good viscosity-temperature, low freezing point, and low volatility and is non-toxic without contaminating the environment and so on. The disadvantage of silicone oil is its great dielectric loss, being easy for hydrolysis and relative high prices and so on. Currently the silicone oil variety frequent application and good efficacy is "polydimethylsiloxane." Silicone oil is easily soluble in water and can also have reaction with the relevant components of the reaction in the air. So it should be tightly sealed during the application process. In addition, it is also necessary to take measures to prevent moisture and air intrusion.

Product Features

Silicone oil having a silica structure and is liquid at room temperature and is called as siloxane, referred as silicone oils. The simplest polydimethylsiloxane is as formula [1]. In [2], if the R, R1, R2 are all methyl groups, it is called α, ω-trimethylsilyloxy polydimethylsiloxane, that’s the commonly called silicone oil. It is a linear polymer of a low molecular weight. If R1 and R2 are not a methyl group, then it is not related to this article. Silicone oil is a colorless or light yellow transparent liquid and is odorless and tasteless. It has a high boiling point and low freezing point. The silicon-oxygen bond is very stable. Silicone oil has the following features: ① low surface tension which is generally less than 209J/cm2 and is lower compared with the water and general surfactant; ② it has low solubility in water and oil with high activity. This feature allows that only a very small amount of silicone oil can already capable of reducing the surface tension of water; ③ It has high stability upon heating and oxygen; This feature allows the silicone oil can be used at high temperature without being subject to decomposition; ④ It has low volatility, and is chemically inert, for example, dimethicone with a viscosity of 3 × 10-2m2/s (20 ℃) ??has a vapor pressure at 100 ℃ as low as only being 6.67 mPa while this value is 40 mPa at 220 ℃. Moreover, it generally does not react with other substances; ⑤ It has high flash point and flame retardancy; ⑥ It has excellent electrical insulation ability with mold release property and anti-foaming property; ⑦ It has no physiological toxicity. Oral Mice LD50:100000 mg/kg, intravenous injection-dog LD50: 1.0ml/kg.


It can be used as emulsifiers. China has provided that it can be applied during the fermentation process with the maximum usage amount being 0.2g/kg. It can be used as advanced lubricants, anti-vibration oil, insulating oil, defoamers, release agents, polishes and vacuum diffusion pump oil. It can be used as the paint for prevention of moisture and rust of metal surface. It can also be used as the coating for the surfaces of buildings for prevention of water. It is used as hardening polyurethane foams additive.


(Liquid) Adhesives, lubricants, protective coat- ings, coolants, mold release agents, dielectric fluids, heat transfer, wetting agents and surfac- tants, foam stabilizer for polyurethanes, diffusion pumps, antifoaming agent for liquids, textile fin- ishes, water repellent, weatherproofing concrete, brake fluids, cosmetic items, polishes, foam shields in solar energy collectors, rust preventives. (Resin) Coatings, molding compounds, laminates (with glass cloth), filament winding sealants, room- temperature curing cements, electrical insulation, impregnating electric coils, bonding agent, modifier for alkyd resins, vibration-damping devices. (Elas- tomer, or silicone rubber) Encapsulation of elec- tronic parts; electrical insulation; gaskets; surgical membranes and implants; automobile engine com- ponents; flexible windows for face masks, air locks, etc.; miscellaneous mechanical products.

Chemical Properties

viscous colourless liquid

Oily linear polysiloxane

Silicone oil is a kind of oily linear polysiloxane produced from the hydrolysis and poly-condensation of chlorotrimethylsilane, ethyl chlorosilane, and phenyl chlorosilane containing mono-functional group and bifunctional group. The commonly called silicone oil means the polydimethylsiloxane and polymethyl phenyl siloxane. Silicone oil is a kind of colorless, odorless, non-toxic, transparent, non-volatile liquid with non-corrosive effect on metal, low freezing point and good anti-water property and moisture resistance, low surface tension and being capable of being resistant to dilute acids and bases and has wide application in various national economy departments. The viscosity of the silicone oil has small changes with temperature. At-60~250 °C, it can be used as a lubricant agent for sextant, electromotor, shells aiming system and shipborne radar devices. When being mixed with thickener such as carbon black and lithium stearate, it can be used for preparation of viscous grease for being applied to vacuum or high temperature sealing systems and the sealing of vacuum cocks, bushings, and valve. It will not be cured by high compression with a relative high compressibility and can be used as liquid springs of aircraft and used for eliminating flutter in the buffer, shock absorption system to maintain the stability of the gauge pointer in aircraft cabin and damping of damper device. Because of its non-corrosiveness on metal and long lifespan, it is widely used as hydraulic pressure fluid in various kinds of delivery systems such as being the hydraulic pressure fluid of aircraft landing gear, flaps, doors, and speed brakes; Because of its small density, low viscosity, it can decrease the weight of the hydraulic pressure systems of the aircraft system by 45% compared with the mineral oil system. It is heat resistant and can be used as the heat transfer medium of-50~250 ℃; it does not absorb moisture and has excellent electrical insulation and can resist high temperature to be used as a dielectric liquid for being applied to the capacitors and the miniature transformer of encapsulating and impregnating. It is permeable to visible light and can be coated to the lens and optical glass to improve the light transmission properties; its being coated to the motion picture film can reduce the friction and extend the lifespan of the film. It has a good water resistance and can be used for processing wool, rayon, nylon, cotton fabric and can be used for making waterproof fabric; it has a low surface tension and can be used for plastic and rubber mold releasing agents; in the food and textile industry, it can be used in defoamers. Dimethyl silicone is non-toxic with physiologically inertia and can be used for the treatment of flatulence and can also play a role of skin care when added to cosmetics.

Chemical Properties

It is milk-white viscous liquid and is non-volatile and odorless. It has a relative density of O.98~1.02. It is miscible with benzene, gasoline and other kinds of chlorinated hydrocarbons, aliphatic and aromatic hydrocarbons; it is not soluble in methanol, ethanol and water, but can be dispersed in water. It is Non-flammable, non-corrosive and is chemically stable. ADI: 0~1.5mg /start (FAO/WHO, 1994).

Production method

The Poly methyl siloxane and gas-phase silicon dioxide are mixed and crushed using roller to silica grease, then add polyoxyethylene alcohol, Tween 80 and deionized water for emulsion to generate it.

63148-62-9 Well-known Company Product Price

Brand (Code)Product description CAS number Packaging Price Detail
Alfa Aesar (A12728)  Silicone oil, for oil baths, usable range from -40 to +200°C    63148-62-9 100g 319.0CNY Detail
Alfa Aesar (A12728)  Silicone oil, for oil baths, usable range from -40 to +200°C    63148-62-9 500g 924.0CNY Detail
Alfa Aesar (A12728)  Silicone oil, for oil baths, usable range from -40 to +200°C    63148-62-9 2500g 3132.0CNY Detail
Sigma-Aldrich (181846)  Poly(dimethylsiloxane)  analytical standard, average Mw 95,000 (Typical), average Mn 50,000 (Typical) 63148-62-9 181846-25G 2,026.44CNY Detail
Sigma-Aldrich (361879)  Poly(dimethylsiloxane)  set of analytical standards, molecular weight series 63148-62-9 361879-1SET 3,477.24CNY Detail
Sigma-Aldrich (S0600000)  Siliconeoil  European Pharmacopoeia (EP) Reference Standard 63148-62-9 S0600000 1,880.19CNY Detail
Sigma-Aldrich (81153)  Poly(dimethylsiloxane)  analytical standard, for GPC, 311 63148-62-9 81153-100MG 5,297.76CNY Detail
USP (1546300)  Polydimethylsiloxane  United States Pharmacopeia (USP) Reference Standard 63148-62-9 1546300-500MG 4,662.45CNY Detail
Sigma-Aldrich (181838)  Siliconeoil  Dow Corning Corporation 200® fluid, viscosity 60,000 cSt (25 °C) 63148-62-9 181838-250ML 910.26CNY Detail
Sigma-Aldrich (181838)  Siliconeoil  Dow Corning Corporation 200® fluid, viscosity 60,000 cSt (25 °C) 63148-62-9 181838-1L 2,095.47CNY Detail
Aldrich (317667)  Siliconeoil  viscosity 5 cSt (25 °C) 63148-62-9 317667-5ML 599.04CNY Detail
Aldrich (317667)  Siliconeoil  viscosity 5 cSt (25 °C) 63148-62-9 317667-250ML 1,702.35CNY Detail



According to Globally Harmonized System of Classification and Labelling of Chemicals (GHS) - Sixth revised edition

Version: 1.0

Creation Date: Aug 13, 2017

Revision Date: Aug 13, 2017


1.1 GHS Product identifier

Product name Dimethylsilicone oil

1.2 Other means of identification

Product number -
Other names Poly(dimethylsiloxane)

1.3 Recommended use of the chemical and restrictions on use

Identified uses For industry use only.
Uses advised against no data available

1.4 Supplier's details

1.5 Emergency phone number

Emergency phone number -
Service hours Monday to Friday, 9am-5pm (Standard time zone: UTC/GMT +8 hours).

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