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, ΔfusHo	? kJ/mol
Std entropy change of fusion, ΔfusSo	? J/(mol·K)
Std enthalpy change of vaporization, ΔvapHo	19.76 kJ/mol
Std entropy change of vaporization, ΔvapSo	? J/(mol·K)
Solid properties
Std enthalpy change of formation, ΔfHosolid	? kJ/mol
Standard molar entropy, Sosolid	? J/(mol K)
Heat capacity, cp	? J/(mol K)
Liquid properties
Std enthalpy change of formation, ΔfHoliquid	? kJ/mol
Standard molar entropy, Soliquid	? J/(mol K)
Heat capacity, cp	? J/(mol K)
Gas properties
Std enthalpy change of formation, ΔfHogas	26.5 kJ/mol
Standard molar entropy, Sogas	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.

• hydrogen iodide MSDS

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• Except where noted otherwise, data relate to Standard temperature and pressure.
• Reliability of data general note.