What is Silicone Oil 350 and what is it used for

What is Silicone Oil 350

Silicone 350 is insoluble in water, methanol, ethanol, dilute acids and caustics, vegetable and mineral oils, glycol and glycerin. It is soluble in hexane, aromatic hydrocarbons, chlorohydrocarbons, ethers, esters, ketones and higher alcohols.

A high quality of silicone oil which is clear, water- white, tasteless, odorless and neutral liquid. Silicone 350 is a linear, 100% Polydimethylsi­loxane Fluid. Its viscosity shows very little change with temperature variation. It exhibits minimum of change among all types of silicone fluids. Outstanding resistance to high and low temperature extremes, maintenance of flexibility over a wide temperature range are its unique properties.

It shows high resistance to breakdown by mechanical shearing. The low change in viscosity with temperature and excellent heat and cold resistance makes it an ideal lubricant. It is, therefore, widely used in gear wheels, bearings and brushes. It exhibits excellent dielectric properties, which are maintained for prolonged periods of time even under varying operating conditions.


  • Synonyms: alpha-Methyl-omega-methoxypolydi­methylsiloxane
  • Formula: (-Si(CH3)2O-)n
  • CAS No: 63148–62–9
  • Viscosity: 350 mm2/s
  • Melting Point: –55 oC
  • Autoignition Point: >400 oC
  • Flash Point: 315 oC
  • Density: 0.98 g/cm3 at 20oC
  • Solubility: insoluble in water

Performance properties:

  • High and low-temperature stability
  • Low pour point
  • Low temperature and pressure dependence of viscosity
  • Good dielectric characteristics
  • Low interfacial energy
  • High surface activity
  • High compressibility
  • Chemical inertness

Uses for Silicone 350:

  • Heat transfer media
  • Thermal transfer fluids
  • Hydraulic fluids
  • Dielectrics fluids
  • Water repellents
  • Polishes
  • Lubricants for eg treadmills
  • Antifoams
  • Mould release agents

Health & Safety:

This product is not classified according to the EU regulations.


Where to buy Buy Silicone Oil 350 cPs online

Buy silicone Antifoam



About mistralhowto

formulation chemist

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