Octadecamethyloctasiloxane
TL;DR: Octadecamethyloctasiloxane (CAS 556-69-4) is a chemical compound with molecular formula C18H54O7Si8 and molecular weight 606.2024 g/mol, supplied by CoreyChem (Career Henan Chemical Co., Ltd.) with ISO-certified quality and global shipping.
[dimethyl(trimethylsilyloxy)silyl]oxy-[[[[dimethyl(trimethylsilyloxy)silyl]oxy-dimethylsilyl]oxy-dimethylsilyl]oxy-dimethylsilyl]oxy-dimethylsilane
Also Known As: OCTADECAMETHYLOCTASILOXANE, Octasiloxane, octadecamethyl-, octadecamethyl-octasiloxane, Octadecamethylpentadecaneoctasiloxane, OCTASILOXANE, OCTADECAMETHYL
Application Areas
Top 5 of 3 IPC patent classification(s) from the SureChEMBL global patent database.
Technical Specifications
| Molecular Formula | C18H54O7Si8 |
| Molecular Weight | 606.2024 g/mol |
| XLogP | 6.98 |
| Topological Polar Surface Area (TPSA) | 64.6 Ų |
| Hydrogen Bond Donors | 0 |
| Hydrogen Bond Acceptors | 7 |
| Rotatable Bonds | 14 |
| Exact Mass | 606.2024 Da |
| Heavy Atoms | 33 |
| Complexity | 587.0 |
| Melting Point | -63 °C |
| Boiling Point | 311.6 °C |
| Density | 0.913 g/cu cm at 20 °C |
| Vapor Pressure | 6.98X10-5 mm Hg at 25 °C (extrapolated) |
| Refractive Index | Index of refraction: 1.3970 at 20 °C/D |
| Solubility | Very soluble in benzene, petroleum ether, ligroin |
| SMILES | C[Si](C)(C)O[Si](C)(C)O[Si](C)(C)O[Si](C)(C)O[Si](C)(C)O[Si](C)(C)O[Si](C)(C)O[Si](C)(C)C |
| InChIKey | VWGDPBQTSZDFMX-UHFFFAOYSA-N |
Product Description
Applications: Octadecamethyloctasiloxane 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. Available from CoreyChem as both catalog item and custom-synthesis project (mg to ton scale), with full analytical documentation (COA, MSDS, HPLC, NMR, MS).
A polymer intermediate supplied by CoreyChem, Octadecamethyloctasiloxane (CAS 556-69-4) has the molecular formula C18H54O7Si8 and a molecular weight of 606.2 g/mol. Reported properties include a density of 0.913 g/cu cm at 20 °C g/cm³, a solubility: Very soluble in benzene, petroleum ether, ligroin. Synonyms include OCTADECAMETHYLOCTASILOXANE and Octasiloxane, octadecamethyl-.
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 Octadecamethyloctasiloxane
Property Insights of Octadecamethyloctasiloxane
The XLogP value of 6.98 indicates that Octadecamethyloctasiloxane is lipophilic (fat-soluble), which may influence its absorption, distribution, and formulation strategy. The TPSA of 64.6 Ų falls within the moderate polarity range, balancing permeability and solubility for Octadecamethyloctasiloxane. Following Lipinski's Rule of Five, Octadecamethyloctasiloxane has 0 hydrogen bond donor(s) and 7 hydrogen bond acceptor(s), which may warrant consideration for formulation optimization.
Frequently Asked Questions
What is the CAS number of Octadecamethyloctasiloxane?
The CAS number of Octadecamethyloctasiloxane is 556-69-4.
What is the molecular formula of Octadecamethyloctasiloxane?
The molecular formula of Octadecamethyloctasiloxane is C18H54O7Si8.
What is the molecular weight of Octadecamethyloctasiloxane?
The molecular weight of Octadecamethyloctasiloxane is 606.2024 g/mol.
What are the applications of Octadecamethyloctasiloxane?
Octadecamethyloctasiloxane 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. Available from CoreyChem as both catalog item and custom-synthesis...
Where can I buy Octadecamethyloctasiloxane?
You can request a quote for Octadecamethyloctasiloxane directly from CoreyChem. Contact us or email [email protected] for pricing and availability.
Does CoreyChem offer custom synthesis for Octadecamethyloctasiloxane?
Yes, CoreyChem provides custom synthesis services for Octadecamethyloctasiloxane and related compounds. Contact us with your specific requirements including quantity, purity, and timeline.