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Dimethyl Silicone Oil

Wide Temperature Dielectric Silicone Fluids

Chemical Name:Linear Polydimethylsiloxane (Dimethylpolysiloxane or PDMS)
Product Category:Silicone FluidsProducts
Structural Formula:silicone-oil-63148-62-9-_11_65_b_116566
CAS No.:CAS No. 63148-62-9
EINECS:203-492-7
Molecular Formula:C6H18OSi2
Molecular Weight:162.38 g/mol

Wide Temperature Dielectric Silicone Fluids

Wide Temperature Dielectric Silicone Fluids (-50°C to 230°C) are clear, colorless, and odorless linear Polydimethylsiloxane (PDMS) fluids (CAS# 63148-62-9). They offer excellent dielectric strength, high flash points, superior thermal stability, and exceptional resistance to oxidation. With low vapor pressure and broad material compatibility—including metals, rubbers, and plastics—these fluids are ideal for dielectric, heat transfer, and thermal management applications.

Wide Temperature Dielectric Silicone Fluids are 100% linear Polydimethylsiloxane (PDMS) fluids (CAS# 63148-62-9), ideal for use as dielectric fluids and coolants in various industrial applications. These fluids are clear, colorless, odorless, and inert to most metals, plastics, and rubbers.

Key Features:

  • High dielectric strength
  • Wide temperature range
  • Low pour point and high flash point
  • Hydrophobic (insoluble in water)
  • Low viscosity change with temperature
  • Excellent oxidation resistance

Viscosity Range:

  • 20cSt to 100cSt (measured at 25°C)

Applications:

  • Electrical transformers
  • Capacitors and other high-voltage equipment

Product Options:

  1. Dow Corning 200® Fluid:
    • 20cSt, 50cSt, 100cSt
  2. Xiameter® PMX-200:
    • 20cSt, 50cSt, 100cSt
  3. Momentive SF96 Series:
    • SF96-20, SF96-50, SF96-100
  4. GE SF96 Series:
    • SF96-20, SF96-50, SF96-100
  5. Momentive Element 14® PDMS:
    • 20cSt, 50cSt, 100cSt
  6. Rhodorsil® 47 V:
    • 50cSt, 100cSt

For High Purity Needs: For fluids with <50ppm water content and IEC 836 specifications, see STO-50 Dielectric Silicone Fluid.

Product Data:

Property PSF-20cSt PSF-50cSt PSF-100cSt
Chemical name Polydimethylsiloxane Polydimethylsiloxane Polydimethylsiloxane
CAS # 63148-62-9 63148-62-9 63148-62-9
Appearance clear, colorless clear, colorless clear, colorless
Odorless Yes Yes Yes
Hydrophobic Yes Yes Yes
Viscosity @ 25°C 20cSt 50cSt 100cSt
V.T.C. 0.59 0.59 0.59
Soluble in water no no no
Pour point -60°C -55°C -55°C
Flash point 232°C 285°C 315°C
Boling point >200°C >250°C >250°C
Vapor pressure @ 25°C <1mmHg <1mmHg <1mmHg
Specific heat @ 25°C J/g °C 1.7 1.5 1.5
Thermal expansion cc/cc/°C 0.00107 0.00106 0.00096
Thermal conductivity g/cal/cm/sec °C 0.00034 0.00036 0.00037
Service temperature -50°C to 220°C -40°C to 230°C -40°C to 230°C

Properties of Dielectric Silicone Fluids

  • Clear, Colorless, Odorless: Clean and safe for use.
  • Long Service Life: Durable within recommended temperature ranges.
  • Low Viscosity: Reduces strain on pumps.
  • Low Pour Points: Effective at temperatures as low as -60°C.
  • Thermal Conductivity: 0.00034 to 0.00037 g/cal/cm/sec°C.
  • Specific Heat Value: 0.36 cal/g°C.
  • Low Viscosity Change: Stable at low temperatures with minimal viscosity increase.
  • Better Than Petroleum Oils: Less viscosity change than traditional oils.
  • 100% Synthetic: Made from high-quality synthetic materials.
  • Environmentally Friendly: VOC Exempt & HAP Free.
  • Hydrophobic: Does not absorb water.

Packaging Specifications

Packaging Specifications

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Wide Temperature Dielectric Silicone Fluids : Guide

Wide Temperature Dielectric Silicone Fluids offer excellent dielectric strength, ranging from 375 to 400 volts/mil, ensuring reliable electrical insulation performance. These fluids are designed with exceptional thermal conductivity values between 0.00034 to 0.00037 g/cal/cm/sec °C (0.15 to 0.16 W/m °C), making them effective in heat dissipation. With specific heat values of 0.36 cal/g °C (1.6 to 1.5 J/g °C), they efficiently absorb and retain heat.

One key advantage of Wide Temperature Dielectric Silicone Fluids is their low Viscosity-Temperature Coefficients (V.T.C.), which results in minimal viscosity increase, even under extremely low temperatures. This feature allows these fluids to circulate effectively in systems operating in challenging cold environments, providing consistent temperature control.

For applications requiring a specific viscosity range, our Pure Silicone Fluids are available, offering a wide range from 0.65 cSt to 20,000,000 cSt.

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