- InChI
- InChI=1S/C9H18O2/c1-3-5-6-7-8(4-2)9(10)11/h8H,3-7H2,1-2H3,(H,10,11)
- InChI Key
- DYWSVUBJGFTOQC-UHFFFAOYSA-N
- Formula
- C9H18O2
- SMILES
- CCCCCC(CC)C(=O)O
- Molecular Weight1
- 158.24
- CAS
- 3274-29-1
- Other Names
-
- 2-Ethylheptanoic acid
- 3-Octanecarboxylic acid
- Cp,gas : Ideal gas heat capacity (J/mol×K).
- η : Dynamic viscosity (Pa×s).
- ΔfG° : Standard Gibbs free energy of formation (kJ/mol).
- ΔfH°gas : Enthalpy of formation at standard conditions (kJ/mol).
- ΔfusH° : Enthalpy of fusion at standard conditions (kJ/mol).
- ΔvapH° : Enthalpy of vaporization at standard conditions (kJ/mol).
- ΔvapH : Enthalpy of vaporization at a given temperature (kJ/mol).
- log10WS : Log10 of Water solubility in mol/l.
- logPoct/wat : Octanol/Water partition coefficient.
- McVol : McGowan's characteristic volume (ml/mol).
- Pc : Critical Pressure (kPa).
- Pvap : Vapor pressure (kPa).
- 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 |
|---|---|---|---|
| ΔfG° | -243.28 | kJ/mol | Joback Calculated Property |
| ΔfH°gas | -499.18 | kJ/mol | Joback Calculated Property |
| ΔfusH° | 21.23 | kJ/mol | Joback Calculated Property |
| ΔvapH° | 58.66 | kJ/mol | Joback Calculated Property |
| log10WS | -2.45 | Crippen Calculated Property | |
| logPoct/wat | 2.678 | Crippen Calculated Property | |
| McVol | 145.110 | ml/mol | McGowan Calculated Property |
| Pc | 2715.50 | kPa | Joback Calculated Property |
| Tboil | 550.93 | K | Joback Calculated Property |
| Tc | 721.77 | K | Joback Calculated Property |
| Tfus | 286.94 | K | Joback Calculated Property |
| Vc | 0.558 | m3/kmol | Joback Calculated Property |
Temperature Dependent Properties
| Property | Value | Unit | Temperature (K) | Source |
|---|---|---|---|---|
| Cp,gas | [355.57; 419.88] | J/mol×K | [550.93; 721.77] | 
|
| Cp,gas | 355.57 | J/mol×K | 550.93 | Joback Calculated Property |
| Cp,gas | 367.51 | J/mol×K | 579.40 | Joback Calculated Property |
| Cp,gas | 378.95 | J/mol×K | 607.88 | Joback Calculated Property |
| Cp,gas | 389.89 | J/mol×K | 636.35 | Joback Calculated Property |
| Cp,gas | 400.35 | J/mol×K | 664.82 | Joback Calculated Property |
| Cp,gas | 410.35 | J/mol×K | 693.29 | Joback Calculated Property |
| Cp,gas | 419.88 | J/mol×K | 721.77 | Joback Calculated Property |
| η | [0.0001171; 0.0229838] | Pa×s | [286.94; 550.93] |
|
| η | 0.0229838 | Pa×s | 286.94 | Joback Calculated Property |
| η | 0.0053119 | Pa×s | 330.94 | Joback Calculated Property |
| η | 0.0017314 | Pa×s | 374.94 | Joback Calculated Property |
| η | 0.0007142 | Pa×s | 418.94 | Joback Calculated Property |
| η | 0.0003486 | Pa×s | 462.93 | Joback Calculated Property |
| η | 0.0001927 | Pa×s | 506.93 | Joback Calculated Property |
| η | 0.0001171 | Pa×s | 550.93 | Joback Calculated Property |
| ΔvapH | 63.40 | kJ/mol | 430.50 | NIST |
Correlations
| Property | Value | Unit | Temperature (K) | Source |
|---|---|---|---|---|
| Pvap | [1.33; 202.65] | kPa | [395.72; 549.25] |
The Yaw...
|
| Equation | ln(Pvp) = A + B/(T + C) | |||
| Coefficient A | 1.54818e+01 | |||
| Coefficient B | -4.72238e+03 | |||
| Coefficient C | -8.49180e+01 | |||
| Temperature range, min. | 395.72 | |||
| Temperature range, max. | 549.25 | |||
| Pvap | 1.33 | kPa | 395.72 | Calculated Property |
| Pvap | 2.94 | kPa | 412.78 | Calculated Property |
| Pvap | 5.99 | kPa | 429.84 | Calculated Property |
| Pvap | 11.42 | kPa | 446.90 | Calculated Property |
| Pvap | 20.55 | kPa | 463.96 | Calculated Property |
| Pvap | 35.14 | kPa | 481.01 | Calculated Property |
| Pvap | 57.50 | kPa | 498.07 | Calculated Property |
| Pvap | 90.46 | kPa | 515.13 | Calculated Property |
| Pvap | 137.50 | kPa | 532.19 | Calculated Property |
| Pvap | 202.65 | kPa | 549.25 | Calculated Property |
Similar Compounds
Find more compounds similar to Heptanoic acid, 2-ethyl-.
Sources
- Crippen Method
- Crippen Method
- Joback Method
- McGowan Method
- NIST Webbook
- The Yaws Handbook of Vapor Pressure
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