Properties of Cyclopropane (C3H6)
Cyclopropane is a highly flammable and colorless gas with a chemical formula C3H6. It is the smallest cycloalkane, consisting of a ring of three carbon atoms, each bonded to two hydrogen atoms. Due to its high ring strain, cyclopropane is known for its reactivity and is used in some chemical reactions.
The following table provides a comprehensive list of cyclopropane 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 | 42.081 g/mol |
| Density (0°C) | 1.879 kg/m3 |
| Dynamic Viscosity (25°C) | 8.74 µPa·s |
| Thermal Properties | Metric |
| Melting Point | -127.6 °C |
| Boiling Point | -33 °C |
| Thermal Conductivity (25°C) | 0.0192 W/m·K |
| Specific Heat Capacity (Cp) | 1321 J/kg·K |
| Critical Constants | Metric |
| Critical Temperature (Tc) | 124.7 °C |
| Critical Pressure (Pc) | 5.56 MPa |
| Critical Density (ρc) | 248 kg/m3 |
| Electrical Properties | Metric |
| Relative Permittivity (εr) | 1.00178 |
| Hazardous Data | Metric |
| Autoignition Temperature | 495 °C |
| Lower Flammability Limit | 2.4% |
| Upper Flammability Limit | 10.4% |
| NFPA Rating (Health) | 1 |
| NFPA Rating (Fire) | 4 |
| 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.