| 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 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 Gravity | 1.185 |
| color | White to Almost white |
| Water Solubility | insoluble |
| Hydrolytic Sensitivity | 1: no significant reaction with aqueous systems |
| BRN | 2320758 |
| LogP | 9 at 20℃ |
| CAS DataBase Reference | 546-56-5(CAS DataBase Reference) |
| NIST Chemistry Reference | Octaphenylcyclotetrasiloxane(546-56-5) |
| EPA Substance Registry System | Cyclotetrasiloxane, octaphenyl- (546-56-5) |
| Safety Information |
| Safety Statements | 22-24/25 |
| WGK Germany | 1 |
| RTECS | GZ4398500 |
| TSCA | Yes |
| HS Code | 29319090 |
| MSDS Information |
| Provider | Language |
|---|---|
| Octaphenylcyclotetrasiloxane | English |
| SigmaAldrich | English |
| ACROS | English |
| ALFA | English |
| Octaphenylcyclotetrasiloxane Usage And Synthesis |
| Chemical Properties | Octaphenylcyclotetrasiloxane (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. |
| Preparation | Octaphenylcyclotetrasiloxane 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 Explosibility | Notclassified |
| Purification Methods | Recrystallise 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 materials | Diphenylsilanediol-->Hexaphenylcyclotrisiloxane |
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