Hydrogen iodide (data page)
This page provides supplementary chemical data on hydrogen iodide.
Structure and properties
| Structure and properties | |
|---|---|
| Index of refraction | 1.466 | 
| Dielectric constant | 1.00214 ε0 at 20 °C | 
| Bond strength | 298.407 kJ/mol | 
| Bond length | 160.9 pm | 
| Magnetic susceptibility | ? | 
Thermodynamic properties
| Phase behavior | |
|---|---|
| Triple point | ? K (? °C), ? Pa | 
| Critical point | 424 K (151 °C), 8310000 Pa | 
| Std enthalpy change of fusion, ΔfusH | ? kJ/mol | 
| Std entropy change of fusion, ΔfusS | ? J/(mol·K) | 
| Std enthalpy change of vaporization, ΔvapH | 19.76 kJ/mol | 
| Std entropy change of vaporization, ΔvapS | ? J/(mol·K) | 
| Solid properties | |
| Std enthalpy change of formation, ΔfH | ? kJ/mol | 
| Standard molar entropy, S | ? J/(mol K) | 
| Heat capacity, cp | ? J/(mol K) | 
| Liquid properties | |
| Std enthalpy change of formation, ΔfH | ? kJ/mol | 
| Standard molar entropy, S | ? J/(mol K) | 
| Heat capacity, cp | ? J/(mol K) | 
| Gas properties | |
| Std enthalpy change of formation, ΔfH | 26.5 kJ/mol | 
| Standard molar entropy, S | 206.6 J/(mol K) | 
| Heat capacity, cp | 29.2 J/(mol K) | 
Spectral data
| UV-Vis | |
|---|---|
| λmax | ? nm | 
| Extinction coefficient, ε | ? | 
| IR | |
| Major absorption bands | ? cm−1 | 
| NMR | |
| Proton NMR | |
| Carbon-13 NMR | |
| Other NMR data | |
| MS | |
| Masses of main fragments | |
Material Safety Data Sheet
The handling of this chemical may incur notable safety precautions. It is highly recommend that you seek the Material Safety Datasheet (MSDS) for this chemical from a reliable source such as SIRI, and follow its directions.
  This box:   
- Except where noted otherwise, data relate to Standard temperature and pressure.
- Reliability of data general note.