Octadecamethyloctasiloxane
TL;DR: Octadecamethyloctasiloxane (CAS 556-69-4) is a chemical compound with molecular formula C18H54O7Si8 and molecular weight 606.20 g/mol, supplied by Kehong Biological (Henan Kehong Biological Technology Co., Ltd.) with CRO/CDMO custom synthesis services.
[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
| Molecular Formula | C18H54O7Si8 |
|---|---|
| Molecular Weight | 606.20 g/mol |
| LogP | 6.98 |
| Topological Polar Surface Area | 64.6 Ų |
| Hydrogen Bond Donors | 0 |
| Hydrogen Bond Acceptors | 7 |
| Rotatable Bonds | 14 |
| Exact Mass | 606.2024 |
| Heavy Atoms | 33 |
| Complexity | 587.0 |
| Melting Point | -63 °C |
| Boiling Point | 311.6 °C |
| Density | 0.913 g/cu cm at 20 °C |
| Solubility | Very soluble in benzene, petroleum ether, ligroin |
| Vapor Pressure | 6.98X10-5 mm Hg at 25 °C (extrapolated) |
| Refractive Index | 1.3970 at 20 °C |
Chemical Identifiers
| CAS Number | 556-69-4 |
|---|---|
| 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 |
Patent-Derived Application Labels
Derived from 3 IPC patent classification(s) across the SureChEMBL global patent database.
Product Overview
Octadecamethyloctasiloxane (CAS 556-69-4), with molecular formula C18H54O7Si8 and molecular weight 606.20 g/mol. IUPAC: [dimethyl(trimethylsilyloxy)silyl]oxy-[[[[dimethyl(trimethylsilyloxy)silyl]oxy-dimethylsilyl]oxy-dimethylsilyl]oxy-dimethylsilyl]oxy-dimethylsilane.
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
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 606.20 g/mol.
Where can I buy Octadecamethyloctasiloxane?
You can request a quote for Octadecamethyloctasiloxane directly from KEHONG BIO. Contact us or email info@kehongbio.com for pricing and availability.
Does KEHONG BIO offer custom synthesis for Octadecamethyloctasiloxane?
Yes, KEHONG BIO provides custom synthesis services for Octadecamethyloctasiloxane and related compounds. Contact us with your specific requirements including quantity, purity, and timeline.