- InChI
- InChI=1S/O3S/c1-4(2)3
- InChI Key
- AKEJUJNQAAGONA-UHFFFAOYSA-N
- Formula
- SO3
- SMILES
- O=S(=O)=O
- Molecular Weight1
- 80.06
- CAS
- 7446-11-9
- Other Names
-
- SULFAN
- SULFURIC OXIDE
- sulfuric anhydride
- ω : Acentric Factor.
- Cp,gas : Ideal gas heat capacity (J/mol×K).
- 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).
- IE : Ionization energy (eV).
- 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 |
|---|---|---|---|
| ω | 0.4516 | Relay (1.0) Calculated Property | |
| ΔfG° | -665.49 | kJ/mol | Joback Calculated Property |
| ΔfH°gas | -409.33 | kJ/mol | Relay (1.0) Calculated Property |
| ΔfusH° | 14.12 | kJ/mol | Joback Calculated Property |
| ΔvapH° | 28.94 | kJ/mol | Relay (1.0) Calculated Property |
| IE | 13.72 | eV | Relay (1.0) Calculated Property |
| logPoct/wat | -1.004 | Crippen Calculated Property | |
| McVol | 40.520 | ml/mol | McGowan Calculated Property |
| Pc | 12182.70 | kPa | Joback Calculated Property |
| Tboil | 315.26 | K | Relay (1.0) Calculated Property |
| Tc | 483.49 | K | Relay (1.0) Calculated Property |
| Tfus | 296.28 | K | Relay (1.0) Calculated Property |
| Vc | 0.125 | m3/kmol | Relay (1.0) Calculated Property |
Cheméo can also estimate Log10 of Water solubility in mol/l for this compound, but it falls outside the models' validated range, so it is not shown here. Open the prediction tool to compute it on demand.
Temperature Dependent Properties
| Property | Value | Unit | Temperature (K) | Source |
|---|---|---|---|---|
| Cp,gas | [48.37; 63.13] | J/mol×K | [235.28; 371.17] | 
|
| Cp,gas | 48.37 | J/mol×K | 235.28 | Joback Calculated Property |
| Cp,gas | 51.36 | J/mol×K | 257.93 | Joback Calculated Property |
| Cp,gas | 54.12 | J/mol×K | 280.58 | Joback Calculated Property |
| Cp,gas | 56.67 | J/mol×K | 303.23 | Joback Calculated Property |
| Cp,gas | 59.02 | J/mol×K | 325.88 | Joback Calculated Property |
| Cp,gas | 61.17 | J/mol×K | 348.53 | Joback Calculated Property |
| Cp,gas | 63.13 | J/mol×K | 371.17 | Joback Calculated Property |
Correlations
| Property | Value | Unit | Temperature (K) | Source |
|---|---|---|---|---|
| Pvap | [20.86; 7958.04] | kPa | [289.95; 490.85] |
The Yaws Handbook of Vapor Pressure
|
| Equation | ln(Pvp) = A + B/(T + C) | |||
| Coefficient A | 1.37724e+01 | |||
| Coefficient B | -1.73803e+03 | |||
| Coefficient C | -1.28040e+02 | |||
| Temperature range, min. | 289.95 | |||
| Temperature range, max. | 490.85 | |||
| Pvap | 20.86 | kPa | 289.95 | Calculated Property |
| Pvap | 76.59 | kPa | 312.27 | Calculated Property |
| Pvap | 212.30 | kPa | 334.59 | Calculated Property |
| Pvap | 482.35 | kPa | 356.92 | Calculated Property |
| Pvap | 947.16 | kPa | 379.24 | Calculated Property |
| Pvap | 1665.90 | kPa | 401.56 | Calculated Property |
| Pvap | 2690.74 | kPa | 423.88 | Calculated Property |
| Pvap | 4063.28 | kPa | 446.21 | Calculated Property |
| Pvap | 5813.14 | kPa | 468.53 | Calculated Property |
| Pvap | 7958.04 | kPa | 490.85 | Calculated Property |
Similar Compounds
Find more compounds similar to SULFUR TRIOXIDE.
Mixtures
Sources
- Cheméo Relay (1.0)
- Crippen Method
- Crippen Method
- Contribution to the quaternary system H2O-Al3+, Ca2+//O2- , SO42- : Solid-liquid equilibria in the ternary systems Al2(SO4)3-CaSO4-H2O and Al2O3-SO3-H2O at 25C
- Density, Viscosity, and Surface Tension of Liquid Phase Beckmann Rearrangement Mixtures
- Joback Method
- KDB
- McGowan Method
- The Yaws Handbook of Vapor Pressure
Note: Cheméo is only indexing the data, follow the source links to retrieve the latest data. The source is also providing more information like the publication year, authors and more.
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