Octamethyltrisiloxane
Title: Octamethyltrisiloxane
CAS Registry Number: 107-51-7
Molecular Formula: C8H24O2Si3
Molecular Weight: 236.53
Percent Composition: C 40.62%, H 10.23%, O 13.53%, Si 35.62%
Literature References: Prepn: Patnode, Wilcock, J. Am. Chem. Soc. 68, 358 (1946).
Properties: Liquid. bp 153°. d 0.8200. nD20 1.3848. mp ~-80°. 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 heavy hydrocarbons.
Melting point: mp ~-80°
Boiling point: bp 153°
Index of refraction: nD20 1.3848
Density: d 0.8200
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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