# Nitromethane (data page)

This page provides supplementary chemical data on nitromethane.

## Material Safety Data Sheet

The handling of this chemical may incur notable safety precautions. MSDS is available from Mallinckrodt Baker.

## Structure and properties

Structure and properties :
| Index of refraction, n$_D$ | 1.3817 at 20 °C |
| Abbe number | ? |
| Dielectric constant, ε$_r$ | 37.27 ε$_0$ at 20 °C |
| Bond strength | ? |
| Bond length | ? |
| Bond angle | ? |
| Magnetic susceptibility | −21.0·10$^{−6}$ cm$^3$/mol |
| Surface tension | 39.04 dyn/cm at 10 °C 36.53 dyn/cm at 25 °C 32.33 dyn/cm at 50 °C |
| Viscosity | 0.63 cP at 25 °C |

## Thermodynamic properties

Phase behavior :
| Triple point | 244.77 K (−23.38 °C), ? Pa |
| Critical point | 588 K (315 °C), 5870 kPa |
| Std enthalpy change of fusion, Δ$_{fus}$H$^o$ | 9.7 kJ/mol |
| Std entropy change of fusion, Δ$_{fus}$S$^o$ | 39.6 J/(mol·K) |
| Std enthalpy change of vaporization, Δ$_{vap}$H$^o$ | 38.3 kJ/mol |
| Std entropy change of vaporization, Δ$_{vap}$S$^o$ | 128.36 J/(mol·K) |
| Solid properties ||
| Std enthalpy change of formation, Δ$_f$H$^o$$_{solid}$ | ? kJ/mol |
| Standard molar entropy, S$^o$$_{solid}$ | ? J/(mol K) |
| Heat capacity, c$_p$ | ? J/(mol K) |
| Liquid properties ||
| Std enthalpy change of formation, Δ$_f$H$^o$$_{liquid}$ | −112. kJ/mol |
| Standard molar entropy, S$^o$$_{liquid}$ | 171.9 J/(mol·K) |
| Enthalpy of combustion, Δ$_c$H$^o$$_{liquid}$ | −709 kJ/mol |
| Heat capacity, c$_p$ | 106.6 J/(mol·K) |
| Gas properties ||
| Std enthalpy change of formation, Δ$_f$H$^o$$_{gas}$ | −80.8 kJ/mol |
| Standard molar entropy, S$^o$$_{gas}$ | 282.9 J/(mol·K) |
| Heat capacity, c$_p$ | 55.5 J/(mol·K) at 25 °C |

## Vapor pressure of liquid

| P in mm Hg | P in mm Hg | 1 | 10 | 40 | 100 | 400 | 760 |
| T in °C | T in °C | −29.0 | 2.8 | 27.5 | 46.6 | 82.0 | 101.2 |
Table data obtained from CRC Handbook of Chemistry and Physics 44th ed.

## Distillation data

Vapor-liquid Equilibrium for Nitromethane/Ethanol P = 730 mm Hg :
| BP Temp. °C | % by mole ethanol | % by mole ethanol |
| BP Temp. °C | liquid | vapor |
| 97.7 | 3.0 | 15.7 |
| 93.4 | 4.7 | 22.3 |
| 88.9 | 8.5 | 32.9 |
| 86.1 | 12.2 | 39.5 |
| 83.6 | 16.6 | 45.3 |
| 80.6 | 25.6 | 52.9 |
| 79.2 | 31.8 | 56.3 |
| 77.9 | 45.1 | 63.5 |
| 77.0 | 53.9 | 66.9 |
| 77.1 | 58.9 | 68.6 |
| 76.5 | 64.6 | 70.5 |
| 76.4 | 72.4 | 74.0 |
| 76.6 | 78.7 | 77.3 |
| 76.5 | 81.9 | 79.4 |
| 76.7 | 85.9 | 82.2 |
| 76.9 | 91.4 | 87.1 |
| 77.7 | 95.3 | 93.0 |
| 77.8 | 97.3 | 96.5 |
Vapor-liquid Equilibrium for Nitromethane/Methanol P = 730 mm Hg :
| BP Temp. °C | % by mole methanol | % by mole methanol |
| BP Temp. °C | liquid | vapor |
| 96.9 | 1.5 | 13.3 |
| 93.1 | 2.6 | 22.8 |
| 89.1 | 4.8 | 33.4 |
| 84.8 | 7.5 | 42.9 |
| 82.1 | 9.6 | 48.4 |
| 77.9 | 15.2 | 57.0 |
| 72.9 | 25.4 | 67.3 |
| 71.1 | 31.4 | 70.4 |
| 68.2 | 42.6 | 74.7 |
| 67.3 | 49.3 | 76.1 |
| 65.6 | 67.8 | 81.8 |
| 65.1 | 74.7 | 83.8 |
| 65.0 | 81.3 | 86.4 |
| 64.6 | 88.6 | 90.1 |
| 64.5 | 91.4 | 92.1 |
| 64.4 | 96.0 | 95.6 |
| 64.5 | 99.4 | 99.3 |

## Spectral data

UV-Vis :
| λ$_{max}$ | ? nm |
| Extinction coefficient, ε | ? |
| IR ||
| Major absorption bands | ? cm$^{−1}$ |
| NMR ||
| Proton NMR | |
| Carbon-13 NMR | |
| Other NMR data | |
| MS ||
| Masses of main fragments | |
* view
* Except where noted otherwise, data relate to Standard temperature and pressure.
* Reliability of data general note.