Octaphenylcyclotetrasiloxane
- CAS No.
- 546-56-5
- Chemical Name:
- Octaphenylcyclotetrasiloxane
- Synonyms
- D 4ph;CO9817;CFS-565;Phenyl-D4;JACS-546-56-5;Co-Formula CFS-565;Octaphenylcyclotetrasilox;Ctaphenylcyclotetrasiloxane;OCTAPHENYLCYCLOTETRASILOXANE;octaphenyl-cyclotetrasiloxan
- CBNumber:
- CB7434749
- Molecular Formula:
- C48H40O4Si4
- Molecular Weight:
- 793.18
- MDL Number:
- MFCD00003268
- MOL File:
- 546-56-5.mol
| Product description | Number | Pack Size | Price |
| Octaphenylcyclotetrasiloxane >98.0%(HPLC) | O0231 | 5g | $23 |
| Octaphenylcyclotetrasiloxane >98.0%(HPLC) | O0231 | 25g | $61 |
| Octaphenylcyclotetrasiloxane | O273115 | 250mg | $45 |
| 2,2,4,4,6,6,8,8-Octaphenyl-1,3,5,7,2,4,6,8-tetraoxatetrasilocane 95+% | 099845 | 10g | $57 |
| Octaphenylcyclotetrasiloxane | P859 | 25g | $60.8 |
| More product size | |||
| Melting point | 196-198 °C(lit.) |
|---|---|
| Boiling point | 334 °C |
| Density | 1.185 |
| vapor pressure | 0Pa at 25℃ |
| refractive index | 1.62 |
| Flash point | 200 °C |
| storage temp. | Storage temp. 2-8°C |
| solubility | very faint turbidity in Toluene |
| form | solid |
| color | White to Almost white |
| Specific Gravity | 1.185 |
| 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) |
| EWG's Food Scores | 1 |
| FDA UNII | 2XYN998HZQ |
| NIST Chemistry Reference | Octaphenylcyclotetrasiloxane(546-56-5) |
| EPA Substance Registry System | Cyclotetrasiloxane, octaphenyl- (546-56-5) |
SAFETY
Risk and Safety Statements
| Symbol(GHS) |  GHS07 |
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Signal word | Warning | |||||||||
| Hazard statements | H302 | |||||||||
| Precautionary statements | P280-P305+P351+P338 | |||||||||
| Safety Statements | 22-24/25 | |||||||||
| WGK Germany | 1 | |||||||||
| RTECS | GZ4398500 | |||||||||
| TSCA | TSCA listed | |||||||||
| HS Code | 29319090 | |||||||||
| NFPA 704 |
|
Octaphenylcyclotetrasiloxane price More Price(16)
| Manufacturer | Product number | Product description | CAS number | Packaging | Price | Updated | Buy |
|---|---|---|---|---|---|---|---|
| TCI Chemical | O0231 | Octaphenylcyclotetrasiloxane >98.0%(HPLC) | 546-56-5 | 5g | $23 | 2025-07-31 | Buy |
| TCI Chemical | O0231 | Octaphenylcyclotetrasiloxane >98.0%(HPLC) | 546-56-5 | 25g | $61 | 2025-07-31 | Buy |
| TRC | O273115 | Octaphenylcyclotetrasiloxane | 546-56-5 | 250mg | $45 | 2021-12-16 | Buy |
| Matrix Scientific | 099845 | 2,2,4,4,6,6,8,8-Octaphenyl-1,3,5,7,2,4,6,8-tetraoxatetrasilocane 95+% | 546-56-5 | 10g | $57 | 2021-12-16 | Buy |
| AK Scientific | P859 | Octaphenylcyclotetrasiloxane | 546-56-5 | 25g | $60.8 | 2021-12-16 | Buy |
Octaphenylcyclotetrasiloxane Chemical Properties,Uses,Production
Application
Octaphenylcyclotetrasiloxane can be physically blended into antifouling coatings in monomer form to reduce the surface energy of the coating, increase the flexibility of the film, and also act as an antifoaming agent. An example of its application is as follows: A heat-dissipating coating is composed of the following raw material components in parts: 100-150 parts polyvinyl chloride, 78-80 parts polyether polyol, 80-85 parts polymethyl methacrylate, 55-80 parts polytetrafluoroethylene, 65-70 parts polyisoprene, 80-90 parts polypropylene, 6-10 parts alumina, 6-8 parts magnesium oxide, 4-6 parts octaphenylcyclotetrasiloxane, 6-8 parts sodium thiosulfate, and 7-9 parts dodecyl diisocyanate. The composition includes: methylamine acetylacetonate, 4-6 parts yttrium acetylacetonate, 5-8 parts 2-thiophenecarboxyltrifluoroacetone, 6-8 parts methyl methacrylate, 6-8 parts dibutyltin dilaurate, 8-10 parts quartz powder, 8-10 parts silica powder, 8-12 parts silica, 7-9 parts n-butanol, 3-5 parts dimethyl carbonate, 2-4 parts p-phenylenediamine, 3-5 parts stearoylbenzoylmethane, 4-5 parts triethyl phosphite, 8-10 parts titanium dioxide, and 12-15 parts bentonite. This invention's heat-dissipating coating exhibits excellent heat dissipation, good adhesion, strong stability, and is safe and free of toxic side effects.
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
Not classified
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
| Supplier | Tel | Country | ProdList | Advantage | |
|---|---|---|---|---|---|
| Suzhou Yuanrui Bio-Tech Co., Ltd | +86-18106132862 | sales02@yuanruibio.com | China | 285 | 58 |
| Dongguan City Betterly New Materials co.,Ltd | +86-13713468294 | sadie@betely.com | China | 39 | 58 |
| Henan Fengda Chemical Co., Ltd | +86-371-86557731 +86-13613820652 | info@fdachem.com | China | 20128 | 58 |
| Shanghai Daken Advanced Materials Co.,Ltd | +86-2158073036 | info@dakenam.com | China | 13799 | 58 |
| Henan Tianfu Chemical Co.,Ltd. | +86-0371-55170693 +86-19937530512 | info@tianfuchem.com | China | 21597 | 55 |
| Hangzhou FandaChem Co.,Ltd. | 008657128800458; +8615858145714 | FandaChem@Gmail.com | China | 1400 | 55 |
| ATK CHEMICAL COMPANY LIMITED | +undefined-21-51877795 | ivan@atkchemical.com | China | 33024 | 60 |
| career henan chemical co | +86-0371-86658258 +8613203830695 | sales@coreychem.com | China | 29831 | 58 |
| Jinan Finer Chemical Co., Ltd | +86-531-88989536 +86-15508631887 | sales@finerchem.com | China | 2950 | 58 |
| Hubei xin bonus chemical co. LTD | 86-13657291602 | linda@hubeijusheng.com | CHINA | 22963 | 58 |
View Lastest Price from Octaphenylcyclotetrasiloxane manufacturers
| Image | Update time | Product | Price | Min. Order | Purity | Supply Ability | Manufacturer | |
|---|---|---|---|---|---|---|---|---|
 |
2026-02-11 | Octaphenylcyclotetrasiloxane
546-56-5
|
US $5.00 / KG | 1KG | 99% | 500mt/year | Jinan Finer Chemical Co., Ltd | |
 |
2025-09-25 | Octaphenylcyclotetrasiloxane
546-56-5
|
US $100.00-1.00 / KG | 1KG | 99% | g-kg-tons, free sample is available | Henan Fengda Chemical Co., Ltd | |
 |
2025-07-17 | Octaphenyl cyclotetrasiloxane
546-56-5
|
US $9.89-8.97 / kg | 200kg | 98.42% | 8000 tons per year | Iota silicone oil (Anhui) Co.,ltd. |
-
- Octaphenylcyclotetrasiloxane
546-56-5
- US $5.00 / KG
- 99%
- Jinan Finer Chemical Co., Ltd
-
- Octaphenylcyclotetrasiloxane
546-56-5
- US $100.00-1.00 / KG
- 99%
- Henan Fengda Chemical Co., Ltd
-
- Octaphenyl cyclotetrasiloxane
546-56-5
- US $9.89-8.97 / kg
- 98.42%
- Iota silicone oil (Anhui) Co.,ltd.
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