Tetradecamethylhexasiloxane
Title: Tetradecamethylhexasiloxane
CAS Registry Number: 107-52-8
Molecular Formula: C14H42O5Si6
Molecular Weight: 458.99
Percent Composition: C 36.63%, H 9.22%, O 17.43%, Si 36.71%
Literature References: Prepd by hydrolysis of dimethyldichlorosilane and trimethylchlorosilane: Patnode, Wilcock, J. Am. Chem. Soc. 68, 358 (1946); by reaction of hexamethyldisiloxane with octamethylcyclotetrasiloxane and sulfuric acid: eidem, ibid. 362; Patnode, US 2469888 (1949 to General Electric); by cohydrolysis of ethoxytrimethylsilane and diethoxydimethylsilane: Hunter et al., J. Am. Chem. Soc. 68, 2284 (1946); Hyde, US 2457677 (1948 to Corning Glass).
Properties: Liquid; bp20 142°; d420 0.8910; nD20 1.3948; flash pt 118.33°C. Freezes below -100°. Stable. Inert to most chemical reagents and rubber. Maintains about the same viscosity over a wide temp range. Sol in benzene and the lighter hydrocarbons; slightly sol in alcohol and the heavy hydrocarbons.
Boiling point: bp20 142°
Flash point: flash pt 118.33°C
Index of refraction: nD20 1.3948
Density: d420 0.8910
Use: As a basis for silicone oils or fluids designed to withstand extremes of temp; as a foam suppressant in petroleum lubricating oil.

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