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Octaphenylcyclotetrasiloxane

Octaphenylcyclotetrasiloxane Basic information
Product Name:Octaphenylcyclotetrasiloxane
Synonyms:1-phenyl-2,5-dihydro-1$l^{5}-phosphole 1-oxide;CFS-565;Co-Formula CFS-565;OCTAPHENYLCYCLOTETRASILOXANE;CO9817;Cyclotetrasiloxane, octaphenyl-;octaphenyl-cyclotetrasiloxan;octaphenylcylclotetrasiloxane
CAS:546-56-5
MF:C48H40O4Si4
MW:793.18
EINECS:208-904-9
Product Categories:Organosilicon;Organometallic Reagents;Si (Classes of Silicon Compounds);Siloxanes;Si-O Compounds;Phenyl Silanes;Organics
Mol File:546-56-5.mol
Octaphenylcyclotetrasiloxane Structure
Octaphenylcyclotetrasiloxane Chemical Properties
Melting point 196-198 °C(lit.)
Boiling point 334 °C
density 1.185
vapor pressure 0Pa at 25℃
refractive index 1.62
Fp 200 °C
solubility very faint turbidity in Toluene
form solid
Specific Gravity1.185
color White to Almost white
Water Solubility insoluble
Hydrolytic Sensitivity1: no significant reaction with aqueous systems
BRN 2320758
LogP9 at 20℃
CAS DataBase Reference546-56-5(CAS DataBase Reference)
NIST Chemistry ReferenceOctaphenylcyclotetrasiloxane(546-56-5)
EPA Substance Registry SystemCyclotetrasiloxane, octaphenyl- (546-56-5)
Safety Information
Safety Statements 22-24/25
WGK Germany 1
RTECS GZ4398500
TSCA Yes
HS Code 29319090
MSDS Information
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Octaphenylcyclotetrasiloxane English
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Octaphenylcyclotetrasiloxane Usage And Synthesis
Chemical PropertiesOctaphenylcyclotetrasiloxane (OPCTS) is a white solid. It can be used for synthesizing pharmaceutical intermediates and organic silicone intermediates, especially for high temperature resistant phenyl silicone oil and other polymers.
PreparationOctaphenylcyclotetrasiloxane is typically produced industrially by one of two processes: 1) the hydrolysis of diphenyldichlorosilane or 2) the hydrolysis of diphenyldialkoxysilanes.
Process the production of octaphenylcyclotetrasiloxane
Flammability and ExplosibilityNotclassified
Purification MethodsRecrystallise it from AcOH, EtOAc, *C6H6 or *C6H6/EtOH. It forms two stable isomorphs and both forms, as well as the mixture, melt at 200-201o. There is a metastable form which melts at 187-189o. [Burkhard et al. J Am Chem Soc 67 2174 1945, Hyde et al. J Am Chem Soc 69 488 1947, Beilstein 16 IV 1530.]
Octaphenylcyclotetrasiloxane Preparation Products And Raw materials
Raw materialsDiphenylsilanediol-->Hexaphenylcyclotrisiloxane
1,3-DIPHENYL-1,3-DIMETHYLDISILOXANE 1,1,3,3-TETRAPHENYLDISILOXANE DIOL 1,1,3,3,5,5-HEXAMETHYLTRISILOXANE 2,4,6,8-TETRAMETHYLCYCLOTETRASILOXANE 1,1,3,3-Tetramethyltetraphenylcyclotetrasiloxane DIPHENYLCYCLOPROPENONE METHYLPHENYLSILANE 1,1,3,3-TETRAMETHYLDISILOXANE HEPTAMETHYL CYCLOTETRASILOXANE quadrosilan 2,4,6,8-tetramethyl-2,4,6,8-tetraphenylcyclotetrasiloxane 1,1,3,3,5,5-hexamethyl-1,3,5-trisilacyclohexane Diphenylsilane 1,1,3,3,5,5,7,7-OCTAMETHYLTETRASILOXANE Octaphenylcyclotetrasiloxane 1,3-dimethyldisiloxane heptamethylphenylcyclotetrasiloxane Diphenylsilanediol
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