Description and features
SilQon OPCTS (Octaphenylcyclotetrasiloxane) is a white solid with the chemical formula C48H40O4Si4. It serves as a key ingredient for synthesizing pharmaceutical intermediates and organic silicone intermediates, particularly in the production of high-temperature-resistant phenyl silicone oil and other polymers.
Additionally, we refer to octaphenylcyclotetrasiloxane as phenyl D4.
Availability
United States: Provided SilQon OPCTS is on stock in our local warehouse our lead time is about one week if delivered in 100 Kg drums.
We can also serve Canada, South America, South Africa, and other markets. Please contact our sales department for more details.
➔ Not available in EU countries.
➔ Limited available in the Europe Union as this product has not been REACH registered (yet).
Product Identification
| CAS number | 546-56-5 |
| EC number | 208-904-9 |
| HS code | 2931 90 00 |
| EC name | Octaphenylcyclotetrasiloxane |
| IUPAC name | Octaphenyl-1,3,5,7,2,4,6,8-tetraoxatetrasilocane |
Specification
| Appearance | White solid |
| Assay | ≥ 98.00 % |
Application
Octaphenylcyclotetrasiloxane is a siloxane that is used as a monomer in the production of phenyl silicone rubber. Besides it finds its application in the pharmaceutical industry for the syntheses of intermediates.
Packaging
Available packaging: 100 KG drums.
Special packaging is available on request.
Storage
Store Octaphenylcyclotetrasiloxane in a cool, dry and well-ventilated area and in line with legal requirements.
MSDS
A Material Safety Data Sheets (MSDS) is available for SilQon OPCTS and all other products supplied by Vesta Chemicals BV.
An MSDS outlines the hazards of a product and explains how to handle, use, and store the product safely. Besides it provides important regulatory and emergency response information for the purchased product.
Molecular and structural information
| Molecular formula | C48H40O4Si4 |
| Molecular weight | 793.17 g/mol |
| InChi key | VSIKJPJINIDELZ-UHFFFAOYSA-N |
| Structural formula |  |
Physicochemical information
| Boiling point | 332 ºC |
| Bulk density | 1.185 g/cm3 @ 25 ºC |
| Flash point | 200 ºC |
| Log Pow | 5.09 |
| Solubility in water | Insoluble in water |
| Vapor pressure | 7.23e-11 mmHg |