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Dimethyl Silicone Oil

D4 Cyclo-2244 Cyclomethicone Fluid

Chemical Name:Polydimethylsiloxane Fluid / PDMS Silicone Oil
Product Category:Cyclomethicones Silicone Fluids
Structural Formula:silicone-oil-63148-62-9-_11_65_b_116566
CAS No.:CAS No. 63148-62-9
Molecular Formula:C6H18OSi2
Molecular Weight:162.38 g/mol

D4 Cyclo-2244 Cyclomethicone Fluid

(D4) Cyclo‐2244-Cyclomethicone is a polydimethyl‐cyclosiloxane that is composed mainly of octamethylcyclotetrasiloxane (CAS# 556‐67‐2). The product is clear, tasteless, essentially odorless, non‐greasy and non‐stinging

Product Equivalent: Dow Corning® 244 Fluid & GE SF1173

Product Data:

Chemical nameOctamethylcyclotetrasiloxane
AppearanceClear, colorless, odorless fluid
Specific gravity @25°C0.95
Viscosity at 25 at 25°C2.5cSt
Heat of Vaporization @ 65°C40
Surface tension17.8
Flash point-closed cup57.22°C
Freeze point *17°C
Boiling point @ 760mmHg172°C
% Volatile100%
Cyclotetrasiloxane (D4) content>90%


  • Low viscosity PDMS Silicone Oils…viscosities slightly higher than water
  • Low pour points (as low as -90°C)
  • Wide Service Temperature Range
  • Low surface tension fluids (high spreadability)
  • Low viscosity change at temperature (low VTC)
  • RI Values between 1.3970 to 1.400
  • High Dielectric Strength
  • Newtonian behavior under shear
  • Excellent Lubricity
  • California VOC Exempt…replacement for petroleum based solvents that are not VOC Compliant

Applications Include:

  • Laboratory Bath Fluids
  • Heat Transfer Fluids
  • Dielectric Fluids
  • Low Viscosity Damping Fluids
  • ORC Turbo Generator Fluids
  • Low Viscosity Hydraulic Fluids
  • Refractive Index Matching Fluids
  • RI Matching Fluids for LED and Optics
  • Low Dielectric Constant Fluids for Photonics
  • VOC Exempt Fluids for Renewable Energies
  • Lubricants for Plastic Parts
  • Lubricants for Rubber Parts

Packaging Specifications

Packaging Specifications
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D4 Cyclomethicone Fluid : Guide

D4 Cyclo-2244 Cyclomethicone is a volatile polydimethylcyclosiloxane that is composed mainly of octamethylcyclotetrasiloxane (CAS#556-67-2). The product is clear, tasteless, essentially odorless, non-greasy and non-stinging.

Due to their volatility (varying rates of evaporation), low surface tensions (high spreadability), and non-greasy feel, Cyclomethicones are used as base fluids, carrying agents and wetting agents in a wide range of personal care products. Cosmetic applications include: room sprays, body sprays, antiperspirants, skin creams, skin lotions, suntan lotions, bath oils, hair care products etc.

Cyclomethicone Fluids are exempt from Federal VOC regulations, including California VOC Regulations (CARB) and OTC. They do not contribute to ozone-depletion and global warming, and are being widely accepted as replacements for Non-VOC compliant petroleum-based solvents. As carrying agents, Cyclo-2244 and Cyclo-2245 have comparable evaporation rates to naptha solvents, odorless mineral spirits (OMS) as well as some of the isoparaffinic solvents. They are compatible with most substates, including metals and plastics.

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