What is Toluene? Toluene, or also known as toluol, is an aromatic hydrocarbon. It can also be referred as methylbenzene, anisen, and phenyl methane. Toluene is a colorless and water-insoluble liquid. It has the smell that is often associated with paint thinners. The chemical has the boiling point of 110ºC and melting point of -93ºC. […]