Title: Octamethylcyclotetrasiloxane
CAS Registry Number: 556-67-2
Molecular Formula: C8H24O4Si4
Molecular Weight: 296.62
Percent Composition: C 32.39%, H 8.16%, O 21.58%, Si 37.87%
Literature References: Isolated from the hydrolysis product of dimethyldichlorosilane: Patnode, Wilcock, J. Am. Chem. Soc. 68, 358 (1946).
Properties: Oily liquid. mp 17.5°. bp 175°. bp20 74°. d 0.9558. nD20 1.3968.
Melting point: mp 17.5°
Boiling point: bp 175°; bp20 74°
Index of refraction: nD20 1.3968
Density: d 0.9558
Use: Preparation of methyl silicon oils.