Properties of Thiophene (C4H4S)
Thiophene is a heterocyclic organic compound consisting of a five-membered ring containing four carbon atoms and one sulfur atom. It is aromatic and is often used as a building block in the synthesis of various organic compounds, including pharmaceuticals and agrochemicals.
The following table provides a comprehensive list of thiophene 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 | 84.14 g/mol |
| Density | 1065 kg/m3 |
| Dynamic Viscosity | 0.659 mPa·s |
| Thermal Properties | Metric |
| Melting Point | -38 °C |
| Boiling Point | 84 °C |
| Thermal Conductivity (25°C) | 0.199 W/m·K |
| Vapor Pressure (25°C) | 10.6 kPa |
| Critical Constants | Metric |
| Critical Temperature (Tc) | 306 °C |
| Critical Pressure (Pc) | 5.7 MPa |
| Critical Molar Volume (Vc) | 230 cm3/mol |
| Electrical Properties | Metric |
| Relative Permittivity (εr) | 2.739 |
| Optical Properties | Metric |
| Refractive Index (589 nm) | 1.5268 |
| Hazardous Data | Metric |
| Flash Point | -1 °C |
| NFPA Rating (Health) | 1 |
| 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.