Carbon monoxide (data page)
# Carbon monoxide (data page)

This page provides supplementary chemical data on carbon monoxide.

## Material safety data sheet

The handling of this chemical may incur notable safety precautions. It is highly recommended that you seek the material safety data sheet (MSDS) for this chemical from a reliable source such as SIRI, and follow its directions.

* MSDS from Advanced Gas Technologies in the SDSdata.org database

## Structure and properties

Structure and properties :

| Index of refraction, $n_D$ | 1.0003364 |
| - | - |
| Abbe number | ? |
| Dielectric constant, $ε_r$ | ? $ε_0$ at ? °C |
| Bond strength | 1850 N/m |
| Bond length | 0.111 nm |
| Bond energy | 1079 kJ/mol |
| Bond angle | Linear |
| Magnetic susceptibility | ? |

## Thermodynamic properties

Phase behavior :

| Triple point | 67.9 K (−205.1 °C), 15.35 kPa |
| - | - |
| Critical point | 132.7 K (−140.3 °C), 3498 kPa, 11.1 mol/L $(3.1×10^2$ $kg/m^3)$ |
| Std enthalpy change of fusion, $Δ_{fus}H^o$ | ? kJ/mol |
| Std entropy change of fusion, $Δ_{fus}S^o$ | ? J/(mol K) |
| Std enthalpy change of vaporization, $Δ_{vap}H^o$ | ? kJ/mol |
| Std entropy change of vaporization, $Δ_{vap}S^o$ | ? J/(mol K) |
| Std enthalpy change of sublimation, $Δ_{sub}H^o$ | 8 kJ/mol (at 51–68 K) |
| Std entropy change of sublimation, $Δ_{sub}S^o$ | ? J/(mol·K) |
| Solid properties ||
| Std enthalpy change of formation, $Δ_fH^o_{solid}$ | −110.5 kJ/mol |
| Standard molar entropy, $S^o_{solid}$ | ? J/(mol K) |
| Heat capacity, $c_p$ | ? J/(mol K) |
| Liquid properties ||
| Std enthalpy change of formation, $Δ_fH^o_{liquid}$ | ? kJ/mol |
| Standard molar entropy, $S^o_{liquid}$ | ? J/(mol K) |
| Heat capacity, $c_p$ | ? J/(mol K) |
| Gas properties ||
| Std enthalpy change of formation, $Δ_fH^o_{gas}$ | −110.53 kJ/mol |
| Std enthalpy change of combustion, $Δ_cH^o_{gas}$ | −283.0 kJ/mol |
| Standard molar entropy, $S^o_{gas}$ | 197.66 J/(mol K) |
| Heat capacity, $c_p$ | 29 J/(mol K) |

## Spectral data

UV-Vis :

| $λ_{max}$ | 55 nm |
| - | - |
| Extinction coefficient, ε | ? |
| IR ||
| Major absorption bands | 2143 $cm^{−1}$ |
| $^{13}CO$ | 2099.2 ± 4 $cm^{−1}$ |
| NMR ||
| Proton NMR | |
| Carbon-13 NMR | |
| Other NMR data | |
| MS ||
| Masses of main fragments | |
