Octamethylcyclotetrasiloxane
TL;DR: Octamethylcyclotetrasiloxane (CAS 556-67-2) is a chemical compound with molecular formula C8H24O4Si4 and molecular weight 296.07516 g/mol, supplied by CoreyChem (Career Henan Chemical Co., Ltd.) with ISO-certified quality and global shipping.
2,2,4,4,6,6,8,8-octamethyl-1,3,5,7,2,4,6,8-tetraoxatetrasilocane
Also Known As: OCTAMETHYLCYCLOTETRASILOXANE, Cyclomethicone 4, OMCTS, Cyclotetrasiloxane, octamethyl-, Cyclotetrasiloxane
Application Areas
Top 5 of 22 IPC patent classification(s) from the SureChEMBL global patent database.
Technical Specifications
| Molecular Formula | C8H24O4Si4 |
| Molecular Weight | 296.07516 g/mol |
| XLogP | 2.87 |
| Topological Polar Surface Area (TPSA) | 36.9 Ų |
| Hydrogen Bond Donors | 0 |
| Hydrogen Bond Acceptors | 4 |
| Rotatable Bonds | 0 |
| Exact Mass | 296.07516 Da |
| Heavy Atoms | 16 |
| Complexity | 197.0 |
| Melting Point | 17.5 °C |
| Boiling Point | 175 °C |
| Density | Specific gravity: 0.9558 |
| Flash Point | 55 °C (131 °F) - closed cup |
| Vapor Pressure | 1.05 [mmHg] |
| Refractive Index | Index of refraction: 1.3968 at 20 °C/D |
| Solubility | In water, 0.056 mg/L at 23 °C |
| SMILES | C[Si]1(O[Si](O[Si](O[Si](O1)(C)C)(C)C)(C)C)C |
| InChIKey | HMMGMWAXVFQUOA-UHFFFAOYSA-N |
Product Description
Applications: Octamethylcyclotetrasiloxane is used in polymer chemistry and functional materials synthesis, as well as pharmaceutical synthesis routes and API production. It commonly serves as a versatile building block for organic synthesis. CoreyChem supplies Octamethylcyclotetrasiloxane (CAS 556-67-2) with custom synthesis available from milligram to multi-kilogram scale, supported by COA, MSDS, and HPLC/NMR/MS documentation.
A polymer intermediate supplied by CoreyChem, Octamethylcyclotetrasiloxane (CAS 556-67-2) has the molecular formula C8H24O4Si4 and a molecular weight of 296.08 g/mol. Reported properties include a density of Specific gravity: 0.9558 g/cm³, a solubility: In water, 0.056 mg/L at 23 °C. It is also known as OCTAMETHYLCYCLOTETRASILOXANE and Cyclomethicone 4.
Custom synthesis and full analytical documentation (COA/MSDS) are available from CoreyChem. Request a quotation with your required quantity and purity for current lead time and pricing.
Chemical Property Profile of Octamethylcyclotetrasiloxane
Property Insights of Octamethylcyclotetrasiloxane
The XLogP value of 2.87 suggests moderate lipophilicity, balancing water solubility and membrane permeability for Octamethylcyclotetrasiloxane. With a topological polar surface area (TPSA) of 36.9 Ų, Octamethylcyclotetrasiloxane exhibits relatively low polarity, potentially indicating favorable cell membrane permeability. Following Lipinski's Rule of Five, Octamethylcyclotetrasiloxane has 0 hydrogen bond donor(s) and 4 hydrogen bond acceptor(s), all within the drug-like range, suggesting favorable oral bioavailability potential.
Frequently Asked Questions
What is the CAS number of Octamethylcyclotetrasiloxane?
The CAS number of Octamethylcyclotetrasiloxane is 556-67-2.
What is the molecular formula of Octamethylcyclotetrasiloxane?
The molecular formula of Octamethylcyclotetrasiloxane is C8H24O4Si4.
What is the molecular weight of Octamethylcyclotetrasiloxane?
The molecular weight of Octamethylcyclotetrasiloxane is 296.07516 g/mol.
What are the applications of Octamethylcyclotetrasiloxane?
Octamethylcyclotetrasiloxane is used in polymer chemistry and functional materials synthesis, as well as pharmaceutical synthesis routes and API production. It commonly serves as a versatile building block for organic synthesis. CoreyChem supplies Octamethylcyclotetrasiloxane (CAS 556-67-2) with...
Where can I buy Octamethylcyclotetrasiloxane?
You can request a quote for Octamethylcyclotetrasiloxane directly from CoreyChem. Contact us or email [email protected] for pricing and availability.
Does CoreyChem offer custom synthesis for Octamethylcyclotetrasiloxane?
Yes, CoreyChem provides custom synthesis services for Octamethylcyclotetrasiloxane and related compounds. Contact us with your specific requirements including quantity, purity, and timeline.