Properties of 2-Butanol (C4H10O)
2-Butanol, also known as sec-butanol, is a chemical compound with the molecular formula C4H10O. It is a colorless liquid with a strong, sweet odor and is commonly used as a solvent in various chemical processes and as a fuel additive.
The following table provides a comprehensive list of 2-butanol 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 | 74.12 g/mol |
| Density | 806 kg/m3 |
| Dynamic Viscosity | 3.706 mPa·s |
| Surface Tension | 23.47 mN/m |
| Thermal Properties | Metric |
| Melting Point | -115 °C |
| Boiling Point | 99.5 °C |
| Thermal Conductivity | 0.1346 W/m·K |
| Specific Heat Capacity (Cp) (25°C) | 0.145 J/kg·K |
| Vapor Pressure | 1.7 kPa |
| Critical Constants | Metric |
| Critical Temperature (Tc) | 263 °C |
| Critical Pressure (Pc) | 4.2 MPa |
| Critical Molar Volume (Vc) | 268 cm3/mol |
| Electrical Properties | Metric |
| Relative Permittivity (εr) | 17.26 |
| Optical Properties | Metric |
| Refractive Index (589 nm) | 1.395 |
| Hazardous Data | Metric |
| Flash Point | 24 °C |
| Autoignition Temperature | 405 °C |
| Lower Flammability Limit | 1.7% |
| Upper Flammability Limit | 9.8% |
| 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.