Toluene Definition
Toluene , also known as toluol , is an aromatic hydrocarbon. It is a colorless, water-insoluble liquid with the smell associated with paint thinners. It is a mono-substituted benzene derivative, consisting of a CH3 group attached to a phenyl group.
Toluene was first isolated in 1837 through a distillation of pine oil by a Polish chemist named Filip Walter, who named it rétinnaphte. In 1841, French chemist Henri Étienne Sainte-Claire Deville isolated a hydrocarbon from balsam of Tolu (an aromatic extract from the tropical Colombian tree Myroxylon balsamum), which Deville recognized as similar to Walter’s rétinnaphte and to benzene; hence he called the new hydrocarbon benzoène. In 1843, Jöns Jacob Berzelius recommended the name toluin. In 1850, French chemist Auguste Cahours isolated from a distillate of wood a hydrocarbon which he recognized as similar to Deville’s benzoène and which Cahours named toluène.
Toluene Applications
- Used as an industrial feedstock.
- Used as a solvent for carbon nanomaterials Used as a precursor to benzene via hydrodealkylation.
- Used in the manufacture of polyurethane foam.
- Used as an octane booster in gasoline fuels for internal combustion engines.
- Used as an intoxicative inhalant in a manner unintended by manufacturers.
- Used as a fullerene indicator.
CHARACTERISTICS
- CBI.
- Liquid.
- OtherSolid.
- Withheld.
- COLOURLESS.
- Sweet, pungent, benzene-like odor.
CHARACTERISTIC | VALUE |
Molecular Weight | 92.13 |
Boiling Point | 110.7 oC |
Melting Point | -95 oC |
Flash Point | 40 oF (closed cup) |
Vapor Density | 3.2 (air = 1) |
Vapor Pressure | 36.7 mm Hg at 30 oC |
Density/Specific Gravity | 0.866 at 20/4 oC (water = 1) |
Log Octanol/Water Partition Coefficient | 2.69 |
Conversion Factor | 1 ppm = 3.77 mg/m3 |