Sample of old thiophene
| IUPAC name
| Other names
|Molar mass||84.14 g/mol|
|Density|| 1.06494 g/cm3 (20 °C)|
1.051 g/cm3 (25 °C)
|Melting point||−38 °C (−36 °F; 235 K)|
|Boiling point||84 °C (183 °F; 357 K)|
|0.301 g/100 ml (25 °C)|
|Solubility||Miscible glacial acetic acid, acetone, benzene, carbon tetrachloride, diethyl ether, dioxane, ethanol, isopropanol, pyridine, toluene, xylene|
|Vapor pressure||40 mmHg (12.5 °C)|
|Safety data sheet||Sigma-Aldrich|
|Flash point||−1 °C (30 °F; 272 K)|
|Lethal dose or concentration (LD, LC):|
LD50 (Median dose)
|1,400 mg/kg (rat, oral)|
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Thiophene is a heterocyclic compound with the formula C4H4S. It is the sulfur analogue of furan.
Oxidation of thiophene with trifluoroperacetic acid gives thiophene S-oxide.
Thiophene is a colorless liquid, with an odor similar to benzene. Older samples appear darker in color.
Thiophene is sold by lab suppliers.
- Make thiophene S-oxide
Thiophene is harmful and irritant if inhaled. It is flammable, and combustion will yield sulfur dioxide which is a strong irritant.
In closed bottles, in dark, away from light.
Should be burned in a special incinerator or neutralized with Fenton's reagent.