It is a colorless, water -insoluble liquid with the smell associated with paint thinners. It is a mono-substituted benzene derivative, consisting of a methyl group (CH 3) attached to a phenyl group. As such, its systematic IUPAC name is methylbenzene. Toluene is predominantly used as an industrial feedstock and a solvent.Chemical formula: C₇H₈Melting point: −95 °C (−139 °F; 178 K)Molar mass: 92.141 g·mol−1Solubility in water: 0.52 g/L (20 °C)