- InChI
- InChI=1S/C18H54O9Si9/c1-28(2)19-29(3,4)21-31(7,8)23-33(11,12)25-35(15,16)27-36(17,18)26-34(13,14)24-32(9,10)22-30(5,6)20-28/h1-18H3
- InChI Key
- ISXOGOLHEGHGQF-UHFFFAOYSA-N
- Formula
- C18H54O9Si9
- SMILES
-
C[Si]1(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)O[Si ](C)(C)O1 - Molecular Weight1
- 667.39
- CAS
- 556-71-8
- Other Names
-
- Octadeamethyl-cyclononasiloxane
- octadecamethylcyclononasiloxane
- ω : Acentric Factor.
- ΔfG° : Standard Gibbs free energy of formation (kJ/mol).
- ΔfH°gas : Enthalpy of formation at standard conditions (kJ/mol).
- ΔfusH : Enthalpy of fusion at a given temperature (kJ/mol).
- ΔvapH° : Enthalpy of vaporization at standard conditions (kJ/mol).
- ΔvapH : Enthalpy of vaporization at a given temperature (kJ/mol).
- IE : Ionization energy (eV).
- log10WS : Log10 of Water solubility in mol/l.
- logPoct/wat : Octanol/Water partition coefficient.
- Pc : Critical Pressure (kPa).
- Pvap : Vapor pressure (kPa).
- Inp : Non-polar retention indices.
- Tboil : Normal Boiling Point Temperature (K).
- Tc : Critical Temperature (K).
- Tfus : Normal melting (fusion) point (K).
- Vc : Critical Volume (m3/kmol).
- 1: Molecular weight from the IUPAC atomic weights tables.
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Physical Properties
| Property | Value | Unit | Source |
|---|---|---|---|
| ω | 0.6956 | Relay (... Calculated Property | |
| ΔfG° | -680.13 | kJ/mol | Relay (... Calculated Property ⚠️ |
| ΔfH°gas | -2769.30 | kJ/mol | Relay (... Calculated Property |
| ΔvapH° | 76.57 | kJ/mol | Relay (... Calculated Property |
| IE | 9.30 | eV | Relay (... Calculated Property |
| log10WS | -3.52 | Relay (... Calculated Property | |
| logPoct/wat | 6.466 | Crippen Calculated Property | |
| Pc | -746.29 | kPa | Relay (... Calculated Property ⚠️ |
| Inp | [1855.00; 1874.00] |
|
|
| Inp | 1858.00 | NIST | |
| Inp | 1871.00 | NIST | |
| Inp | 1865.00 | NIST | |
| Inp | 1866.00 | NIST | |
| Inp | 1868.00 | NIST | |
| Inp | 1869.00 | NIST | |
| Inp | 1874.00 | NIST | |
| Inp | 1874.00 | NIST | |
| Inp | 1855.00 | NIST | |
| Inp | 1865.00 | NIST | |
| Inp | 1874.00 | NIST | |
| Inp | 1858.00 | NIST | |
| Tboil | 585.66 | K | Relay (... Calculated Property |
| Tc | 682.55 | K | Relay (... Calculated Property |
| Tfus | 250.00 ± 1.00 | K | NIST |
| Vc | 2.215 | m3/kmol | Relay (... Calculated Property |
Temperature Dependent Properties
| Property | Value | Unit | Temperature (K) | Source |
|---|---|---|---|---|
| ΔfusH | 25.64 | kJ/mol | 246.20 | NIST |
| ΔvapH | [67.90; 68.00] | kJ/mol | [523.50; 525.50] |
|
| ΔvapH | 67.90 | kJ/mol | 523.50 | NIST |
| ΔvapH | 68.00 | kJ/mol | 525.50 | NIST |
| Pvap | [4.73e-04; 0.23] | kPa | [338.15; 418.15] |
|
| Pvap | 4.73e-04 | kPa | 338.15 | Tempera... |
| Pvap | 1.20e-03 | kPa | 348.15 | Tempera... |
| Pvap | 2.89e-03 | kPa | 358.15 | Tempera... |
| Pvap | 6.63e-03 | kPa | 368.15 | Tempera... |
| Pvap | 0.01 | kPa | 378.15 | Tempera... |
| Pvap | 0.03 | kPa | 388.15 | Tempera... |
| Pvap | 0.06 | kPa | 398.15 | Tempera... |
| Pvap | 0.12 | kPa | 408.15 | Tempera... |
| Pvap | 0.23 | kPa | 418.15 | Tempera... |
Similar Compounds
Find more compounds similar to Cyclononasiloxane, octadecamethyl-.
Sources
- Cheméo Relay (1.0)
- Cheméo Relay (1.0, beta) ⚠️ Beta: served but experimental, data-limited and below our cross-validation release bar; the Joback value is recommended where available.
- Crippen Method
- Crippen Method
- Temperature-Dependent Vapor Pressure of Selected Cyclic and Linear Polydimethylsiloxane Oligomers
- NIST Webbook
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