Properties of Acetonitrile (C2H3N)
Acetonitrile is a colorless, volatile, and highly flammable organic compound with the chemical formula C2H3N. It is a nitrile compound and is often used in various chemical and industrial applications, including chromatography and spectroscopy.
The following table provides a comprehensive list of acetonitrile properties in both SI and US customary/Imperial units at normal temperature and pressure (NTP).
Click on the icon to switch between Metric and Imperial units.
| Physical Properties | Metric |
|---|---|
| Molar Mass | 41.05 g/mol |
| Density | 782 kg/m3 |
| Dynamic Viscosity | 0.35 mPa·s |
| Surface Tension | 29 mN/m |
| Thermal Properties | Metric |
| Melting Point | -44 °C |
| Boiling Point | 82 °C |
| Thermal Conductivity | 0.19 W/m·K |
| Specific Heat Capacity (Cp) | 2260 J/kg·K |
| Coefficient of Thermal Expansion (αV) | 1.37×10-3 1/°C |
| Vapor Pressure | 9.73 kPa |
| Critical Constants | Metric |
| Critical Temperature (Tc) | 272.3 °C |
| Critical Pressure (Pc) | 5 MPa |
| Critical Molar Volume (Vc) | 173 cm3/mol |
| Electrical Properties | Metric |
| Relative Permittivity (εr) | 36.64 |
| Optical Properties | Metric |
| Refractive Index (589 nm) | 1.344 |
| Hazardous Data | Metric |
| Flash Point | 6 °C |
| Autoignition Temperature | 524 °C |
| Lower Flammability Limit | 3% |
| Upper Flammability Limit | 16% |
| NFPA Rating (Health) | 2 |
| NFPA Rating (Fire) | 3 |
| NFPA Rating (Reactivity) | 0 |
Unless stated otherwise, all values are taken at room temperature (approximately 20°C or 68°F) and 1 atm pressure. (1 atm = 101,325 Pa)
Related Pages
References: 1) Cardarelli, François. Materials Handbook: A Concise Desktop Reference. Switzerland: Springer International Publishing, 2018. 2) CRC Handbook of Chemistry and Physics, 97th Edition. United Kingdom: CRC Press, 2016-2017. 3) Yaws, Carl L. The Yaws Handbook of Physical Properties for Hydrocarbons and Chemicals. Netherlands: Elsevier Science, 2015. 4) Fire Protection Guide to Hazardous Materials, 14th Edition. United States: National Fire Protection Association, 2010.